{"id":30239,"date":"2026-07-20T14:42:33","date_gmt":"2026-07-20T06:42:33","guid":{"rendered":"https:\/\/www.cnspd.com\/?p=30239"},"modified":"2026-07-21T11:20:18","modified_gmt":"2026-07-21T03:20:18","slug":"spd-maintenance-checklist-for-maintenance-teams-and-panel-builders","status":"publish","type":"post","link":"https:\/\/www.cnspd.com\/id\/spd-maintenance-checklist\/","title":{"rendered":"Daftar Periksa Pemeliharaan SPD untuk Tim Pemeliharaan dan Pembuat Panel"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"30239\" class=\"elementor elementor-30239\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3eecc69 e-flex e-con-boxed e-con e-parent\" data-id=\"3eecc69\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ab4b0ab elementor-widget elementor-widget-html\" data-id=\"ab4b0ab\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<style>\r\n:root {\r\n    --lym-blue: #004898;\r\n    --lym-blue-dark: #00366f;\r\n    --lym-blue-light: #edf5fd;\r\n    --lym-blue-pale: #f5f9fe;\r\n    --lym-text: #172033;\r\n    --lym-muted: #596579;\r\n    --lym-line: #dbe3ed;\r\n    --lym-bg: #f6f8fb;\r\n    --lym-white: #ffffff;\r\n    --lym-green: #157347;\r\n    --lym-green-bg: #eaf7ef;\r\n    --lym-amber: #a85b08;\r\n    --lym-amber-bg: #fff6e8;\r\n    --lym-red: #b42318;\r\n    --lym-red-bg: #fff0ef;\r\n    --lym-radius: 16px;\r\n    --lym-shadow: 0 12px 34px rgba(23, 32, 51, 0.08);\r\n}\r\n\r\n.lym-page,\r\n.lym-page * {\r\n    box-sizing: border-box;\r\n}\r\n\r\n.lym-page {\r\n    width: 100%;\r\n    max-width: 1180px;\r\n    margin: 0 auto;\r\n    color: var(--lym-text);\r\n    font-family: inherit;\r\n    font-size: 17px;\r\n    line-height: 1.72;\r\n}\r\n\r\n.lym-page p {\r\n    margin: 0 0 18px;\r\n}\r\n\r\n.lym-page h2,\r\n.lym-page h3,\r\n.lym-page h4 {\r\n    color: var(--lym-text);\r\n    line-height: 1.25;\r\n    letter-spacing: -0.02em;\r\n}\r\n\r\n.lym-page h2 {\r\n    margin: 62px 0 22px;\r\n    padding-top: 4px;\r\n    font-size: clamp(29px, 3vw, 40px);\r\n}\r\n\r\n.lym-page h3 {\r\n    margin: 34px 0 14px;\r\n    font-size: clamp(22px, 2vw, 28px);\r\n}\r\n\r\n.lym-page h4 {\r\n    margin: 0;\r\n    font-size: 19px;\r\n}\r\n\r\n.lym-page ul,\r\n.lym-page ol {\r\n    margin: 0 0 22px;\r\n    padding-left: 25px;\r\n}\r\n\r\n.lym-page li {\r\n    margin-bottom: 8px;\r\n}\r\n\r\n.lym-page section[id] {\r\n    scroll-margin-top: 100px;\r\n}\r\n\r\n.lym-page a {\r\n    color: var(--lym-blue);\r\n    text-decoration: underline;\r\n    text-decoration-thickness: 1px;\r\n    text-underline-offset: 3px;\r\n}\r\n\r\n.lym-page a:hover {\r\n    color: var(--lym-blue-dark);\r\n}\r\n\r\n\/* =========================\r\n   INTRO\r\n========================= *\/\r\n\r\n.lym-intro {\r\n    padding: 35px 38px;\r\n    border: 1px solid var(--lym-line);\r\n    border-top: 5px solid var(--lym-blue);\r\n    border-radius: var(--lym-radius);\r\n    background:\r\n        linear-gradient(\r\n            135deg,\r\n            rgba(0, 72, 152, 0.075),\r\n            rgba(255, 255, 255, 0) 50%\r\n        ),\r\n        var(--lym-white);\r\n    box-shadow: var(--lym-shadow);\r\n}\r\n\r\n.lym-eyebrow {\r\n    display: inline-flex;\r\n    align-items: center;\r\n    gap: 8px;\r\n    margin-bottom: 15px;\r\n    color: var(--lym-blue);\r\n    font-size: 13px;\r\n    font-weight: 800;\r\n    line-height: 1.2;\r\n    letter-spacing: 0.09em;\r\n    text-transform: uppercase;\r\n}\r\n\r\n.lym-eyebrow::before {\r\n    width: 9px;\r\n    height: 9px;\r\n    border-radius: 50%;\r\n    background: var(--lym-blue);\r\n    content: \"\";\r\n}\r\n\r\n.lym-lead {\r\n    max-width: 980px;\r\n    margin-bottom: 20px !important;\r\n    color: #243047;\r\n    font-size: clamp(20px, 2vw, 26px);\r\n    font-weight: 650;\r\n    line-height: 1.48;\r\n}\r\n\r\n.lym-intro-copy {\r\n    max-width: 950px;\r\n    color: var(--lym-muted);\r\n}\r\n\r\n.lym-meta {\r\n    display: grid;\r\n    grid-template-columns: repeat(4, minmax(0, 1fr));\r\n    gap: 1px;\r\n    margin: 25px 0 0;\r\n    overflow: hidden;\r\n    border: 1px solid var(--lym-line);\r\n    border-radius: 12px;\r\n    background: var(--lym-line);\r\n}\r\n\r\n.lym-meta-item {\r\n    padding: 16px 17px;\r\n    background: #ffffff;\r\n}\r\n\r\n.lym-meta-label {\r\n    display: block;\r\n    margin-bottom: 5px;\r\n    color: var(--lym-muted);\r\n    font-size: 11px;\r\n    font-weight: 800;\r\n    letter-spacing: 0.06em;\r\n    text-transform: uppercase;\r\n}\r\n\r\n.lym-meta-value {\r\n    display: block;\r\n    color: var(--lym-text);\r\n    font-size: 14px;\r\n    font-weight: 700;\r\n    line-height: 1.45;\r\n}\r\n\r\n.lym-answer {\r\n    margin-top: 25px;\r\n    padding: 24px 26px;\r\n    border-left: 5px solid var(--lym-blue);\r\n    border-radius: 0 13px 13px 0;\r\n    background: var(--lym-blue-light);\r\n}\r\n\r\n.lym-answer strong {\r\n    display: block;\r\n    margin-bottom: 8px;\r\n    color: var(--lym-blue-dark);\r\n    font-size: 19px;\r\n}\r\n\r\n.lym-answer p:last-child {\r\n    margin-bottom: 0;\r\n}\r\n\r\n.lym-download-intro {\r\n    margin: 25px 0 0;\r\n    padding-top: 23px;\r\n    border-top: 1px solid var(--lym-line);\r\n}\r\n\r\n.lym-download-intro strong {\r\n    display: block;\r\n    margin-bottom: 6px;\r\n}\r\n\r\n.lym-download-intro p {\r\n    max-width: 900px;\r\n    margin-bottom: 0;\r\n    color: var(--lym-muted);\r\n    font-size: 15px;\r\n}\r\n\r\n.lym-actions {\r\n    display: flex;\r\n    flex-wrap: wrap;\r\n    gap: 12px;\r\n    margin-top: 18px;\r\n}\r\n\r\n.lym-btn {\r\n    display: inline-flex;\r\n    min-height: 48px;\r\n    align-items: center;\r\n    justify-content: center;\r\n    padding: 12px 20px;\r\n    border: 1px solid transparent;\r\n    border-radius: 8px;\r\n    font-family: inherit;\r\n    font-size: 15px;\r\n    font-weight: 750;\r\n    line-height: 1.2;\r\n    text-align: center;\r\n    text-decoration: none !important;\r\n    cursor: pointer;\r\n    transition:\r\n        transform 0.2s ease,\r\n        box-shadow 0.2s ease,\r\n        background-color 0.2s ease,\r\n        border-color 0.2s ease;\r\n}\r\n\r\n.lym-btn:hover {\r\n    transform: translateY(-1px);\r\n}\r\n\r\n.lym-btn-primary {\r\n    color: #ffffff !important;\r\n    background: var(--lym-blue);\r\n    box-shadow: 0 8px 18px rgba(0, 72, 152, 0.2);\r\n}\r\n\r\n.lym-btn-primary:hover {\r\n    background: var(--lym-blue-dark);\r\n}\r\n\r\n.lym-btn-secondary {\r\n    border-color: #aebccd;\r\n    color: var(--lym-text) !important;\r\n    background: #ffffff;\r\n}\r\n\r\n.lym-btn-secondary:hover {\r\n    border-color: var(--lym-blue);\r\n    color: var(--lym-blue) !important;\r\n}\r\n\r\n\/* =========================\r\n   TABLE OF CONTENTS\r\n========================= *\/\r\n\r\n.lym-toc {\r\n    margin: 34px 0 10px;\r\n    padding: 28px 30px;\r\n    border: 1px solid var(--lym-line);\r\n    border-radius: var(--lym-radius);\r\n    background: var(--lym-bg);\r\n}\r\n\r\n.lym-toc-title {\r\n    margin-bottom: 15px;\r\n    font-size: 19px;\r\n    font-weight: 800;\r\n}\r\n\r\n.lym-toc-grid {\r\n    display: grid;\r\n    grid-template-columns: repeat(2, minmax(0, 1fr));\r\n    gap: 7px 28px;\r\n}\r\n\r\n.lym-toc a {\r\n    display: block;\r\n    padding: 7px 0;\r\n    color: var(--lym-text);\r\n    font-size: 15px;\r\n    font-weight: 650;\r\n    text-decoration: none;\r\n}\r\n\r\n.lym-toc a:hover {\r\n    color: var(--lym-blue);\r\n}\r\n\r\n\/* =========================\r\n   GENERAL\r\n========================= *\/\r\n\r\n.lym-section-intro {\r\n    max-width: 930px;\r\n    color: var(--lym-muted);\r\n    font-size: 18px;\r\n}\r\n\r\n.lym-figure {\r\n    width: 100%;\r\n    margin: 30px 0 38px;\r\n}\r\n\r\n.lym-figure-frame {\r\n    overflow: hidden;\r\n    border: 1px solid var(--lym-line);\r\n    border-radius: 15px;\r\n    background: #ffffff;\r\n    box-shadow: 0 11px 30px rgba(23, 32, 51, 0.08);\r\n}\r\n\r\n.lym-figure img {\r\n    display: block;\r\n    width: 100%;\r\n    height: auto;\r\n    margin: 0;\r\n    border: 0;\r\n    object-fit: contain;\r\n}\r\n\r\n.lym-figure figcaption {\r\n    margin: 12px auto 0;\r\n    padding: 0 10px;\r\n    color: var(--lym-muted);\r\n    font-size: 14px;\r\n    line-height: 1.55;\r\n    text-align: center;\r\n}\r\n\r\n.lym-callout {\r\n    margin: 26px 0;\r\n    padding: 23px 25px;\r\n    border-radius: 13px;\r\n}\r\n\r\n.lym-callout strong {\r\n    display: block;\r\n    margin-bottom: 7px;\r\n}\r\n\r\n.lym-callout p:last-child {\r\n    margin-bottom: 0;\r\n}\r\n\r\n.lym-callout-blue {\r\n    border: 1px solid #bdd7ef;\r\n    background: var(--lym-blue-light);\r\n}\r\n\r\n.lym-callout-amber {\r\n    border: 1px solid #efc77c;\r\n    background: var(--lym-amber-bg);\r\n}\r\n\r\n.lym-callout-red {\r\n    border: 1px solid #efb3ae;\r\n    background: var(--lym-red-bg);\r\n}\r\n\r\n\/* =========================\r\n   SCHEDULE: ALWAYS 2 x 2\r\n========================= *\/\r\n\r\n.lym-schedule-grid {\r\n    display: grid;\r\n    grid-template-columns: repeat(2, minmax(0, 1fr));\r\n    gap: 20px;\r\n    margin: 28px 0 32px;\r\n}\r\n\r\n.lym-schedule-card {\r\n    display: grid;\r\n    grid-template-columns: 78px minmax(0, 1fr);\r\n    gap: 20px;\r\n    min-height: 245px;\r\n    padding: 27px;\r\n    border: 1px solid var(--lym-line);\r\n    border-radius: 15px;\r\n    background: #ffffff;\r\n    box-shadow: 0 8px 24px rgba(23, 32, 51, 0.055);\r\n}\r\n\r\n.lym-schedule-number {\r\n    display: flex;\r\n    width: 58px;\r\n    height: 58px;\r\n    align-items: center;\r\n    justify-content: center;\r\n    border-radius: 50%;\r\n    color: #ffffff;\r\n    background: var(--lym-blue);\r\n    font-size: 19px;\r\n    font-weight: 850;\r\n}\r\n\r\n.lym-schedule-content {\r\n    min-width: 0;\r\n}\r\n\r\n.lym-frequency {\r\n    display: block;\r\n    margin-bottom: 9px;\r\n    color: var(--lym-blue);\r\n    font-size: 13px;\r\n    font-weight: 850;\r\n    line-height: 1.35;\r\n    letter-spacing: 0.06em;\r\n    text-transform: uppercase;\r\n}\r\n\r\n.lym-schedule-card h3 {\r\n    margin: 0 0 12px;\r\n    font-size: clamp(23px, 2vw, 28px);\r\n}\r\n\r\n.lym-schedule-card p {\r\n    margin-bottom: 0;\r\n    color: var(--lym-muted);\r\n}\r\n\r\n.lym-schedule-card-event {\r\n    border-color: #efc77c;\r\n    background:\r\n        linear-gradient(\r\n            135deg,\r\n            rgba(255, 246, 232, 0.9),\r\n            rgba(255, 255, 255, 1)\r\n        );\r\n}\r\n\r\n.lym-schedule-card-event .lym-schedule-number {\r\n    background: var(--lym-amber);\r\n}\r\n\r\n\/* =========================\r\n   CHECKLIST CARDS\r\n========================= *\/\r\n\r\n.lym-checklist-section {\r\n    margin: 34px 0 42px;\r\n}\r\n\r\n.lym-checklist-heading {\r\n    display: flex;\r\n    align-items: center;\r\n    gap: 13px;\r\n    margin: 0 0 18px;\r\n    padding: 15px 19px;\r\n    border-left: 5px solid var(--lym-blue);\r\n    border-radius: 0 10px 10px 0;\r\n    color: var(--lym-blue-dark);\r\n    background: var(--lym-blue-light);\r\n    font-size: 20px;\r\n    font-weight: 850;\r\n    line-height: 1.35;\r\n}\r\n\r\n.lym-checklist-grid {\r\n    display: grid;\r\n    grid-template-columns: repeat(2, minmax(0, 1fr));\r\n    gap: 18px;\r\n}\r\n\r\n.lym-check-card {\r\n    overflow: hidden;\r\n    border: 1px solid var(--lym-line);\r\n    border-radius: 14px;\r\n    background: #ffffff;\r\n    box-shadow: 0 7px 22px rgba(23, 32, 51, 0.045);\r\n}\r\n\r\n.lym-check-card-head {\r\n    display: grid;\r\n    grid-template-columns: 32px minmax(0, 1fr) auto;\r\n    gap: 11px;\r\n    align-items: start;\r\n    padding: 19px 20px;\r\n    border-bottom: 1px solid var(--lym-line);\r\n    background: var(--lym-blue-pale);\r\n}\r\n\r\n.lym-checkbox {\r\n    display: inline-flex;\r\n    width: 23px;\r\n    height: 23px;\r\n    align-items: center;\r\n    justify-content: center;\r\n    margin-top: 1px;\r\n    border: 2px solid var(--lym-blue);\r\n    border-radius: 4px;\r\n    color: var(--lym-blue);\r\n    font-size: 14px;\r\n    font-weight: 800;\r\n    line-height: 1;\r\n}\r\n\r\n.lym-check-card-title {\r\n    min-width: 0;\r\n    font-size: 18px;\r\n    font-weight: 800;\r\n    line-height: 1.4;\r\n}\r\n\r\n.lym-timing {\r\n    display: inline-flex;\r\n    max-width: 145px;\r\n    align-items: center;\r\n    padding: 5px 9px;\r\n    border-radius: 999px;\r\n    color: var(--lym-blue-dark);\r\n    background: #dfeefd;\r\n    font-size: 11px;\r\n    font-weight: 800;\r\n    line-height: 1.3;\r\n    text-align: center;\r\n}\r\n\r\n.lym-check-card-body {\r\n    display: grid;\r\n    grid-template-columns: repeat(2, minmax(0, 1fr));\r\n}\r\n\r\n.lym-check-detail {\r\n    min-width: 0;\r\n    padding: 19px 20px 21px;\r\n}\r\n\r\n.lym-check-detail + .lym-check-detail {\r\n    border-left: 1px solid var(--lym-line);\r\n    background: #fcfdff;\r\n}\r\n\r\n.lym-detail-label {\r\n    display: block;\r\n    margin-bottom: 7px;\r\n    color: var(--lym-blue);\r\n    font-size: 12px;\r\n    font-weight: 850;\r\n    letter-spacing: 0.05em;\r\n    text-transform: uppercase;\r\n}\r\n\r\n.lym-check-detail p {\r\n    margin: 0;\r\n    color: var(--lym-muted);\r\n    font-size: 15px;\r\n    line-height: 1.62;\r\n}\r\n\r\n\/* =========================\r\n   GENERAL CARD GRIDS\r\n========================= *\/\r\n\r\n.lym-grid-3,\r\n.lym-grid-2 {\r\n    display: grid;\r\n    gap: 18px;\r\n    margin: 26px 0 31px;\r\n}\r\n\r\n.lym-grid-3 {\r\n    grid-template-columns: repeat(3, minmax(0, 1fr));\r\n}\r\n\r\n.lym-grid-2 {\r\n    grid-template-columns: repeat(2, minmax(0, 1fr));\r\n}\r\n\r\n.lym-card {\r\n    height: 100%;\r\n    padding: 24px;\r\n    border: 1px solid var(--lym-line);\r\n    border-radius: 14px;\r\n    background: #ffffff;\r\n    box-shadow: 0 7px 22px rgba(23, 32, 51, 0.05);\r\n}\r\n\r\n.lym-card h3,\r\n.lym-card h4 {\r\n    margin-top: 0;\r\n}\r\n\r\n.lym-card p:last-child,\r\n.lym-card ul:last-child {\r\n    margin-bottom: 0;\r\n}\r\n\r\n.lym-number {\r\n    display: inline-flex;\r\n    width: 38px;\r\n    height: 38px;\r\n    align-items: center;\r\n    justify-content: center;\r\n    margin-bottom: 15px;\r\n    border-radius: 50%;\r\n    color: #ffffff;\r\n    background: var(--lym-blue);\r\n    font-size: 15px;\r\n    font-weight: 850;\r\n}\r\n\r\n\/* =========================\r\n   WORKFLOW\r\n========================= *\/\r\n\r\n.lym-workflow {\r\n    display: grid;\r\n    grid-template-columns: repeat(5, minmax(0, 1fr));\r\n    gap: 13px;\r\n    margin: 28px 0 35px;\r\n}\r\n\r\n.lym-workflow-step {\r\n    position: relative;\r\n    padding: 21px 17px;\r\n    border: 1px solid var(--lym-line);\r\n    border-radius: 13px;\r\n    background: #ffffff;\r\n    text-align: center;\r\n}\r\n\r\n.lym-workflow-step:not(:last-child)::after {\r\n    position: absolute;\r\n    top: 50%;\r\n    right: -13px;\r\n    width: 13px;\r\n    color: var(--lym-blue);\r\n    content: \"\u203a\";\r\n    font-size: 27px;\r\n    font-weight: 900;\r\n    line-height: 1;\r\n    transform: translateY(-50%);\r\n    z-index: 2;\r\n}\r\n\r\n.lym-workflow-step strong {\r\n    display: block;\r\n    margin-bottom: 7px;\r\n    color: var(--lym-blue-dark);\r\n}\r\n\r\n.lym-workflow-step span {\r\n    display: block;\r\n    color: var(--lym-muted);\r\n    font-size: 14px;\r\n    line-height: 1.45;\r\n}\r\n\r\n\/* =========================\r\n   EVENT CARDS\r\n========================= *\/\r\n\r\n.lym-event-grid {\r\n    display: grid;\r\n    grid-template-columns: repeat(2, minmax(0, 1fr));\r\n    gap: 18px;\r\n    margin: 26px 0 32px;\r\n}\r\n\r\n.lym-event-card {\r\n    padding: 24px;\r\n    border: 1px solid var(--lym-line);\r\n    border-radius: 14px;\r\n    background: #ffffff;\r\n    box-shadow: 0 7px 22px rgba(23, 32, 51, 0.045);\r\n}\r\n\r\n.lym-event-trigger {\r\n    display: flex;\r\n    gap: 12px;\r\n    align-items: flex-start;\r\n    margin-bottom: 18px;\r\n}\r\n\r\n.lym-event-icon {\r\n    display: inline-flex;\r\n    width: 35px;\r\n    height: 35px;\r\n    flex: 0 0 35px;\r\n    align-items: center;\r\n    justify-content: center;\r\n    border-radius: 50%;\r\n    color: #ffffff;\r\n    background: var(--lym-amber);\r\n    font-size: 16px;\r\n    font-weight: 850;\r\n}\r\n\r\n.lym-event-trigger h3 {\r\n    margin: 3px 0 0;\r\n    font-size: 20px;\r\n}\r\n\r\n.lym-event-detail {\r\n    padding: 15px 0;\r\n    border-top: 1px solid var(--lym-line);\r\n}\r\n\r\n.lym-event-detail:first-of-type {\r\n    padding-top: 0;\r\n    border-top: 0;\r\n}\r\n\r\n.lym-event-detail:last-child {\r\n    padding-bottom: 0;\r\n}\r\n\r\n.lym-event-detail p {\r\n    margin: 0;\r\n    color: var(--lym-muted);\r\n    font-size: 15px;\r\n}\r\n\r\n\/* =========================\r\n   STATUS CARDS\r\n========================= *\/\r\n\r\n.lym-status-grid {\r\n    display: grid;\r\n    grid-template-columns: repeat(2, minmax(0, 1fr));\r\n    gap: 18px;\r\n    margin: 26px 0 32px;\r\n}\r\n\r\n.lym-status-card {\r\n    padding: 23px;\r\n    border: 1px solid var(--lym-line);\r\n    border-radius: 14px;\r\n    background: #ffffff;\r\n}\r\n\r\n.lym-status-card-head {\r\n    display: flex;\r\n    gap: 12px;\r\n    align-items: center;\r\n    margin-bottom: 17px;\r\n}\r\n\r\n.lym-status-dot {\r\n    width: 16px;\r\n    height: 16px;\r\n    flex: 0 0 16px;\r\n    border-radius: 50%;\r\n}\r\n\r\n.lym-status-dot-green {\r\n    background: var(--lym-green);\r\n}\r\n\r\n.lym-status-dot-red {\r\n    background: var(--lym-red);\r\n}\r\n\r\n.lym-status-dot-amber {\r\n    background: var(--lym-amber);\r\n}\r\n\r\n.lym-status-card h3 {\r\n    margin: 0;\r\n    font-size: 20px;\r\n}\r\n\r\n.lym-status-block {\r\n    padding: 14px 0;\r\n    border-top: 1px solid var(--lym-line);\r\n}\r\n\r\n.lym-status-block:first-of-type {\r\n    border-top: 0;\r\n}\r\n\r\n.lym-status-block:last-child {\r\n    padding-bottom: 0;\r\n}\r\n\r\n.lym-status-block p {\r\n    margin: 0;\r\n    color: var(--lym-muted);\r\n    font-size: 15px;\r\n}\r\n\r\n\/* =========================\r\n   DECISION\r\n========================= *\/\r\n\r\n.lym-decision {\r\n    display: grid;\r\n    grid-template-columns: minmax(0, 1fr) 72px minmax(0, 1fr);\r\n    align-items: stretch;\r\n    margin: 27px 0;\r\n}\r\n\r\n.lym-decision-panel {\r\n    padding: 27px;\r\n    border-radius: 14px;\r\n}\r\n\r\n.lym-decision-panel h3 {\r\n    margin-top: 0;\r\n}\r\n\r\n.lym-decision-replace {\r\n    border: 1px solid #efb3ae;\r\n    background: var(--lym-red-bg);\r\n}\r\n\r\n.lym-decision-investigate {\r\n    border: 1px solid #efc77c;\r\n    background: var(--lym-amber-bg);\r\n}\r\n\r\n.lym-decision-divider {\r\n    display: flex;\r\n    align-items: center;\r\n    justify-content: center;\r\n    color: var(--lym-muted);\r\n    font-size: 12px;\r\n    font-weight: 850;\r\n    text-align: center;\r\n    text-transform: uppercase;\r\n}\r\n\r\n\/* =========================\r\n   HANDOVER CARDS\r\n========================= *\/\r\n\r\n.lym-handover-grid {\r\n    display: grid;\r\n    grid-template-columns: repeat(2, minmax(0, 1fr));\r\n    gap: 16px;\r\n    margin: 27px 0 32px;\r\n}\r\n\r\n.lym-handover-card {\r\n    display: grid;\r\n    grid-template-columns: 38px minmax(0, 1fr);\r\n    gap: 14px;\r\n    padding: 22px;\r\n    border: 1px solid var(--lym-line);\r\n    border-radius: 13px;\r\n    background: #ffffff;\r\n}\r\n\r\n.lym-handover-card h3 {\r\n    margin: 0 0 7px;\r\n    font-size: 19px;\r\n}\r\n\r\n.lym-handover-card p {\r\n    margin: 0;\r\n    color: var(--lym-muted);\r\n    font-size: 15px;\r\n}\r\n\r\n\/* =========================\r\n   MAINTENANCE RECORD FORM\r\n========================= *\/\r\n\r\n.lym-record {\r\n    margin: 27px 0 34px;\r\n    padding: 28px;\r\n    border: 1px solid var(--lym-line);\r\n    border-radius: 15px;\r\n    background: #ffffff;\r\n    box-shadow: 0 7px 22px rgba(23, 32, 51, 0.045);\r\n}\r\n\r\n.lym-record-grid {\r\n    display: grid;\r\n    grid-template-columns: repeat(2, minmax(0, 1fr));\r\n    column-gap: 34px;\r\n    row-gap: 23px;\r\n}\r\n\r\n.lym-record-field {\r\n    min-width: 0;\r\n}\r\n\r\n.lym-record-label {\r\n    display: block;\r\n    margin-bottom: 8px;\r\n    color: var(--lym-blue-dark);\r\n    font-size: 13px;\r\n    font-weight: 800;\r\n}\r\n\r\n.lym-record-line {\r\n    display: block;\r\n    min-height: 28px;\r\n    border-bottom: 1px solid #9ba8b8;\r\n}\r\n\r\n.lym-record-field-wide {\r\n    grid-column: 1 \/ -1;\r\n}\r\n\r\n.lym-record-field-wide .lym-record-line {\r\n    min-height: 52px;\r\n}\r\n\r\n\/* =========================\r\n   SPECIALIST LINKS\r\n========================= *\/\r\n\r\n.lym-specialist-links {\r\n    margin: 27px 0;\r\n    padding: 24px 26px;\r\n    border: 1px solid var(--lym-line);\r\n    border-radius: 13px;\r\n    background: var(--lym-bg);\r\n}\r\n\r\n.lym-specialist-links strong {\r\n    display: block;\r\n    margin-bottom: 11px;\r\n}\r\n\r\n.lym-specialist-links ul {\r\n    margin-bottom: 0;\r\n}\r\n\r\n\/* =========================\r\n   FAQ\r\n========================= *\/\r\n\r\n.lym-faq {\r\n    margin-top: 25px;\r\n}\r\n\r\n.lym-faq details {\r\n    margin-bottom: 12px;\r\n    border: 1px solid var(--lym-line);\r\n    border-radius: 11px;\r\n    background: #ffffff;\r\n}\r\n\r\n.lym-faq summary {\r\n    position: relative;\r\n    padding: 19px 52px 19px 21px;\r\n    font-weight: 800;\r\n    line-height: 1.4;\r\n    cursor: pointer;\r\n    list-style: none;\r\n}\r\n\r\n.lym-faq summary::-webkit-details-marker {\r\n    display: none;\r\n}\r\n\r\n.lym-faq summary::after {\r\n    position: absolute;\r\n    top: 50%;\r\n    right: 21px;\r\n    color: var(--lym-blue);\r\n    content: \"+\";\r\n    font-size: 25px;\r\n    line-height: 1;\r\n    transform: translateY(-50%);\r\n}\r\n\r\n.lym-faq details[open] summary::after {\r\n    content: \"\u2212\";\r\n}\r\n\r\n.lym-faq-answer {\r\n    padding: 0 21px 20px;\r\n    color: var(--lym-muted);\r\n}\r\n\r\n.lym-faq-answer p:last-child {\r\n    margin-bottom: 0;\r\n}\r\n\r\n\/* =========================\r\n   RELATED \/ SOURCES \/ CTA\r\n========================= *\/\r\n\r\n.lym-related {\r\n    margin-top: 58px;\r\n    padding: 30px;\r\n    border: 1px solid var(--lym-line);\r\n    border-radius: var(--lym-radius);\r\n    background: var(--lym-bg);\r\n}\r\n\r\n.lym-related h2 {\r\n    margin-top: 0;\r\n    font-size: 28px;\r\n}\r\n\r\n.lym-related-grid {\r\n    display: grid;\r\n    grid-template-columns: repeat(2, minmax(0, 1fr));\r\n    gap: 12px 24px;\r\n}\r\n\r\n.lym-related a {\r\n    display: block;\r\n    padding: 13px 14px;\r\n    border: 1px solid var(--lym-line);\r\n    border-radius: 9px;\r\n    color: var(--lym-text);\r\n    background: #ffffff;\r\n    font-weight: 700;\r\n    text-decoration: none;\r\n}\r\n\r\n.lym-related a:hover {\r\n    border-color: var(--lym-blue);\r\n    color: var(--lym-blue);\r\n}\r\n\r\n.lym-source-list {\r\n    margin-top: 24px;\r\n    padding-left: 22px;\r\n}\r\n\r\n.lym-source-list li {\r\n    margin-bottom: 13px;\r\n    padding-left: 4px;\r\n}\r\n\r\n.lym-source-list a {\r\n    font-weight: 700;\r\n}\r\n\r\n.lym-cta {\r\n    margin-top: 62px;\r\n    padding: 36px;\r\n    border-radius: var(--lym-radius);\r\n    color: #ffffff;\r\n    background:\r\n        linear-gradient(\r\n            135deg,\r\n            rgba(0, 72, 152, 0.98),\r\n            rgba(0, 53, 111, 0.98)\r\n        );\r\n    box-shadow: 0 18px 42px rgba(0, 53, 111, 0.2);\r\n}\r\n\r\n.lym-cta h2 {\r\n    margin: 0 0 13px;\r\n    padding: 0;\r\n    color: #ffffff;\r\n    font-size: clamp(27px, 3vw, 37px);\r\n}\r\n\r\n.lym-cta p {\r\n    max-width: 850px;\r\n    color: rgba(255, 255, 255, 0.9);\r\n}\r\n\r\n.lym-cta .lym-btn-primary {\r\n    color: var(--lym-blue-dark) !important;\r\n    background: #ffffff;\r\n}\r\n\r\n.lym-cta .lym-btn-primary:hover {\r\n    background: #eef5fc;\r\n}\r\n\r\n.lym-small {\r\n    color: var(--lym-muted);\r\n    font-size: 14px;\r\n}\r\n\r\n\/* =========================\r\n   RESPONSIVE\r\n========================= *\/\r\n\r\n@media (max-width: 1440px) {\r\n    .lym-page {\r\n        max-width: 1140px;\r\n    }\r\n}\r\n\r\n@media (max-width: 1366px) {\r\n    .lym-page {\r\n        max-width: 1100px;\r\n    }\r\n}\r\n\r\n@media (max-width: 1280px) {\r\n    .lym-page {\r\n        max-width: 1040px;\r\n    }\r\n}\r\n\r\n@media (max-width: 1024px) {\r\n    .lym-page {\r\n        max-width: 100%;\r\n        padding: 0 22px;\r\n    }\r\n\r\n    .lym-meta {\r\n        grid-template-columns: repeat(2, minmax(0, 1fr));\r\n    }\r\n\r\n    .lym-workflow {\r\n        grid-template-columns: repeat(3, minmax(0, 1fr));\r\n    }\r\n\r\n    .lym-workflow-step::after {\r\n        display: none;\r\n    }\r\n\r\n    .lym-schedule-card {\r\n        grid-template-columns: 60px minmax(0, 1fr);\r\n        gap: 15px;\r\n        padding: 23px;\r\n    }\r\n\r\n    .lym-schedule-number {\r\n        width: 48px;\r\n        height: 48px;\r\n        font-size: 17px;\r\n    }\r\n}\r\n\r\n@media (max-width: 912px) {\r\n    .lym-grid-3 {\r\n        grid-template-columns: repeat(2, minmax(0, 1fr));\r\n    }\r\n\r\n    .lym-checklist-grid {\r\n        grid-template-columns: 1fr;\r\n    }\r\n\r\n    .lym-decision {\r\n        grid-template-columns: 1fr;\r\n        gap: 14px;\r\n    }\r\n\r\n    .lym-decision-divider {\r\n        min-height: 32px;\r\n    }\r\n}\r\n\r\n@media (max-width: 820px) {\r\n    .lym-intro {\r\n        padding: 30px;\r\n    }\r\n\r\n    .lym-toc-grid {\r\n        grid-template-columns: 1fr;\r\n    }\r\n\r\n    .lym-schedule-grid,\r\n    .lym-event-grid,\r\n    .lym-status-grid,\r\n    .lym-handover-grid {\r\n        grid-template-columns: 1fr;\r\n    }\r\n\r\n    .lym-schedule-card {\r\n        min-height: 0;\r\n    }\r\n}\r\n\r\n@media (max-width: 768px) {\r\n    .lym-page {\r\n        padding: 0 18px;\r\n        font-size: 16px;\r\n    }\r\n\r\n    .lym-page h2 {\r\n        margin-top: 49px;\r\n    }\r\n\r\n    .lym-grid-2,\r\n    .lym-related-grid {\r\n        grid-template-columns: 1fr;\r\n    }\r\n\r\n    .lym-workflow {\r\n        grid-template-columns: repeat(2, minmax(0, 1fr));\r\n    }\r\n\r\n    .lym-figure-frame {\r\n        border-radius: 12px;\r\n    }\r\n\r\n    .lym-figure figcaption {\r\n        font-size: 13px;\r\n    }\r\n\r\n    .lym-check-card-body {\r\n        grid-template-columns: 1fr;\r\n    }\r\n\r\n    .lym-check-detail + .lym-check-detail {\r\n        border-top: 1px solid var(--lym-line);\r\n        border-left: 0;\r\n    }\r\n}\r\n\r\n@media (max-width: 600px) {\r\n    .lym-intro {\r\n        padding: 25px 22px;\r\n        border-radius: 13px;\r\n    }\r\n\r\n    .lym-answer {\r\n        padding: 21px;\r\n    }\r\n\r\n    .lym-grid-3,\r\n    .lym-workflow {\r\n        grid-template-columns: 1fr;\r\n    }\r\n\r\n    .lym-actions {\r\n        flex-direction: column;\r\n    }\r\n\r\n    .lym-btn {\r\n        width: 100%;\r\n    }\r\n\r\n    .lym-figure {\r\n        margin: 23px 0 29px;\r\n    }\r\n\r\n    .lym-cta {\r\n        padding: 29px 23px;\r\n    }\r\n\r\n    .lym-record-grid {\r\n        grid-template-columns: 1fr;\r\n    }\r\n\r\n    .lym-record-field-wide {\r\n        grid-column: auto;\r\n    }\r\n\r\n    .lym-check-card-head {\r\n        grid-template-columns: 30px minmax(0, 1fr);\r\n    }\r\n\r\n    .lym-timing {\r\n        grid-column: 2;\r\n        justify-self: start;\r\n        max-width: none;\r\n    }\r\n}\r\n\r\n@media (max-width: 540px) {\r\n    .lym-page {\r\n        padding: 0 15px;\r\n    }\r\n\r\n    .lym-toc,\r\n    .lym-related {\r\n        padding: 22px;\r\n    }\r\n\r\n    .lym-meta {\r\n        grid-template-columns: 1fr;\r\n    }\r\n\r\n    .lym-schedule-card {\r\n        grid-template-columns: 1fr;\r\n    }\r\n\r\n    .lym-schedule-number {\r\n        width: 44px;\r\n        height: 44px;\r\n    }\r\n\r\n    .lym-record {\r\n        padding: 22px;\r\n    }\r\n}\r\n\r\n@media (max-width: 480px) {\r\n    .lym-lead {\r\n        font-size: 20px;\r\n    }\r\n\r\n    .lym-page h2 {\r\n        font-size: 28px;\r\n    }\r\n\r\n    .lym-page h3 {\r\n        font-size: 22px;\r\n    }\r\n\r\n    .lym-figure figcaption {\r\n        text-align: left;\r\n    }\r\n}\r\n\r\n@media (max-width: 430px) {\r\n    .lym-intro {\r\n        padding: 23px 19px;\r\n    }\r\n\r\n    .lym-card,\r\n    .lym-event-card,\r\n    .lym-status-card,\r\n    .lym-handover-card {\r\n        padding: 21px;\r\n    }\r\n}\r\n\r\n@media (max-width: 414px) {\r\n    .lym-page {\r\n        padding: 0 13px;\r\n    }\r\n\r\n    .lym-callout {\r\n        padding: 20px;\r\n    }\r\n}\r\n\r\n@media (max-width: 390px) {\r\n    .lym-page {\r\n        font-size: 15.5px;\r\n    }\r\n\r\n    .lym-toc {\r\n        padding: 20px 18px;\r\n    }\r\n}\r\n\r\n@media (max-width: 375px) {\r\n    .lym-answer {\r\n        padding: 19px 17px;\r\n    }\r\n\r\n    .lym-cta {\r\n        padding: 26px 19px;\r\n    }\r\n}\r\n\r\n@media (max-width: 360px) {\r\n    .lym-page {\r\n        padding: 0 11px;\r\n    }\r\n\r\n    .lym-page h2 {\r\n        font-size: 26px;\r\n    }\r\n}\r\n\r\n@media (max-width: 320px) {\r\n    .lym-page {\r\n        padding: 0 8px;\r\n    }\r\n\r\n    .lym-intro {\r\n        padding: 21px 16px;\r\n    }\r\n\r\n    .lym-btn {\r\n        padding-right: 13px;\r\n        padding-left: 13px;\r\n        font-size: 14px;\r\n    }\r\n}\r\n\r\n\/* =========================\r\n   PRINT\r\n========================= *\/\r\n\r\n@media print {\r\n    body.lym-print-mode * {\r\n        visibility: hidden !important;\r\n    }\r\n\r\n    body.lym-print-mode #lym-print-area,\r\n    body.lym-print-mode #lym-print-area * {\r\n        visibility: visible !important;\r\n    }\r\n\r\n    body.lym-print-mode #lym-print-area {\r\n        position: absolute;\r\n        top: 0;\r\n        left: 0;\r\n        width: 100%;\r\n        max-width: none;\r\n        margin: 0;\r\n        color: #000000;\r\n    }\r\n\r\n    body.lym-print-mode .lym-screen-only {\r\n        display: none !important;\r\n    }\r\n\r\n    body.lym-print-mode .lym-checklist-grid,\r\n    body.lym-print-mode .lym-schedule-grid,\r\n    body.lym-print-mode .lym-event-grid,\r\n    body.lym-print-mode .lym-status-grid,\r\n    body.lym-print-mode .lym-handover-grid {\r\n        grid-template-columns: repeat(2, minmax(0, 1fr));\r\n    }\r\n\r\n    body.lym-print-mode .lym-check-card,\r\n    body.lym-print-mode .lym-schedule-card,\r\n    body.lym-print-mode .lym-event-card,\r\n    body.lym-print-mode .lym-status-card,\r\n    body.lym-print-mode .lym-handover-card,\r\n    body.lym-print-mode .lym-card,\r\n    body.lym-print-mode .lym-callout,\r\n    body.lym-print-mode .lym-figure,\r\n    body.lym-print-mode .lym-record {\r\n        box-shadow: none;\r\n        break-inside: avoid;\r\n    }\r\n\r\n    body.lym-print-mode .lym-figure-frame {\r\n        border-color: #999999;\r\n        box-shadow: none;\r\n    }\r\n}\r\n<\/style>\r\n\r\n<div class=\"lym-page\">\r\n\r\n    <section class=\"lym-intro\">\r\n        <div class=\"lym-eyebrow\">\r\n            Field-ready preventive maintenance guide\r\n        <\/div>\r\n\r\n        <p class=\"lym-lead\">\r\n            This SPD maintenance checklist helps maintenance teams and panel\r\n            builders plan inspection intervals, check SPD condition, test remote\r\n            signals, record corrective actions and manage replacement stock.\r\n        <\/p>\r\n\r\n        <p class=\"lym-intro-copy\">\r\n            It is designed for low-voltage distribution boards, solar PV\r\n            installations, telecom sites, industrial control panels and OEM\r\n            switchboards. The goal is not only to identify a red indicator. The\r\n            goal is to maintain a traceable system that confirms where each SPD is\r\n            installed, what was checked, what failed, what was replaced and whether\r\n            the underlying cause was resolved.\r\n        <\/p>\r\n\r\n        <div class=\"lym-meta\">\r\n            <div class=\"lym-meta-item\">\r\n                <span class=\"lym-meta-label\">Prepared for<\/span>\r\n                <span class=\"lym-meta-value\">\r\n                    Maintenance teams and panel builders\r\n                <\/span>\r\n            <\/div>\r\n\r\n            <div class=\"lym-meta-item\">\r\n                <span class=\"lym-meta-label\">Technical scope<\/span>\r\n                <span class=\"lym-meta-value\">\r\n                    AC, PV DC and signal-line SPD maintenance\r\n                <\/span>\r\n            <\/div>\r\n\r\n            <div class=\"lym-meta-item\">\r\n                <span class=\"lym-meta-label\">Technical review<\/span>\r\n                <span class=\"lym-meta-value\">\r\n                    LEEYEE SPD Engineering Team\r\n                <\/span>\r\n            <\/div>\r\n\r\n            <div class=\"lym-meta-item\">\r\n                <span class=\"lym-meta-label\">Last updated<\/span>\r\n                <span class=\"lym-meta-value\">\r\n                    July 20, 2026\r\n                <\/span>\r\n            <\/div>\r\n        <\/div>\r\n\r\n        <div class=\"lym-answer\">\r\n            <strong>Quick answer: how often should SPDs be inspected?<\/strong>\r\n\r\n            <p>\r\n                There is no single inspection interval that applies to every\r\n                installation. A practical SPD maintenance schedule combines routine\r\n                visual checks, planned panel inspections, an annual documented\r\n                review and immediate event-triggered checks after lightning, surge\r\n                alarms, backup-protection operation or electrical-system changes.\r\n            <\/p>\r\n\r\n            <p>\r\n                Final intervals must follow local requirements, the site risk\r\n                assessment, the lightning protection inspection programme, the\r\n                installed SPD manufacturer's instructions and the criticality of\r\n                the protected equipment.\r\n            <\/p>\r\n        <\/div>\r\n\r\n        <div class=\"lym-download-intro lym-screen-only\">\r\n            <strong>Use the checklist in the field<\/strong>\r\n\r\n            <p>\r\n                Print the complete inspection checklist as a PDF, or download an\r\n                editable CSV maintenance log containing asset details, inspection\r\n                results, corrective actions, replacement records and the next\r\n                inspection date.\r\n            <\/p>\r\n\r\n            <div class=\"lym-actions\">\r\n                <button\r\n                    type=\"button\"\r\n                    class=\"lym-btn lym-btn-primary\"\r\n                    id=\"lym-print-btn\">\r\n                    <span>Print \/ Save SPD Checklist as PDF<\/span>\r\n                <\/button>\r\n\r\n                <button\r\n                    type=\"button\"\r\n                    class=\"lym-btn lym-btn-secondary\"\r\n                    id=\"lym-csv-btn\">\r\n                    <span>Download Editable Maintenance Log<\/span>\r\n                <\/button>\r\n            <\/div>\r\n        <\/div>\r\n    <\/section>\r\n\r\n    <nav class=\"lym-toc lym-screen-only\" aria-label=\"Article contents\">\r\n        <div class=\"lym-toc-title\">On this page<\/div>\r\n\r\n        <div class=\"lym-toc-grid\">\r\n            <a href=\"#inspection-frequency\">\r\n                1. Recommended inspection schedule\r\n            <\/a>\r\n\r\n            <a href=\"#maintenance-checklist\">\r\n                2. Complete maintenance checklist\r\n            <\/a>\r\n\r\n            <a href=\"#safe-workflow\">\r\n                3. Safe inspection workflow\r\n            <\/a>\r\n\r\n            <a href=\"#routine-inspection\">\r\n                4. Routine visual inspection\r\n            <\/a>\r\n\r\n            <a href=\"#planned-inspection\">\r\n                5. Planned panel inspection\r\n            <\/a>\r\n\r\n            <a href=\"#annual-review\">\r\n                6. Annual documented review\r\n            <\/a>\r\n\r\n            <a href=\"#post-event-inspection\">\r\n                7. Post-lightning and event checks\r\n            <\/a>\r\n\r\n            <a href=\"#indicator-remote-signal\">\r\n                8. Indicator and remote signal checks\r\n            <\/a>\r\n\r\n            <a href=\"#replace-or-investigate\">\r\n                9. Replacement and root-cause decision\r\n            <\/a>\r\n\r\n            <a href=\"#panel-builder-handover\">\r\n                10. Panel builder handover checklist\r\n            <\/a>\r\n\r\n            <a href=\"#spare-stock\">\r\n                11. Replacement stock planning\r\n            <\/a>\r\n\r\n            <a href=\"#maintenance-record\">\r\n                12. Maintenance record template\r\n            <\/a>\r\n\r\n            <a href=\"#application-notes\">\r\n                13. Application-specific notes\r\n            <\/a>\r\n\r\n            <a href=\"#faq\">\r\n                14. Frequently asked questions\r\n            <\/a>\r\n        <\/div>\r\n    <\/nav>\r\n\r\n    <div id=\"lym-print-area\">\r\n\r\n        <section id=\"inspection-frequency\">\r\n            <div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/id\/spd-maintenance-checklist\/#recommended-spd-inspection-schedule\" >Recommended SPD Inspection Schedule<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/id\/spd-maintenance-checklist\/#complete-spd-maintenance-checklist\" >Complete SPD Maintenance Checklist<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/id\/spd-maintenance-checklist\/#safe-spd-inspection-workflow\" >Safe SPD Inspection Workflow<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/id\/spd-maintenance-checklist\/#routine-visual-inspection\" >Routine Visual Inspection<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/id\/spd-maintenance-checklist\/#quarterly-or-planned-panel-inspection\" >Quarterly or Planned Panel Inspection<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/id\/spd-maintenance-checklist\/#annual-documented-spd-review\" >Annual Documented SPD Review<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/id\/spd-maintenance-checklist\/#when-an-immediate-post-event-inspection-is-required\" >When an Immediate Post-Event Inspection Is Required<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/id\/spd-maintenance-checklist\/#checking-the-spd-indicator-and-remote-signal\" >Checking the SPD Indicator and Remote Signal<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/id\/spd-maintenance-checklist\/#replace-the-spd-or-investigate-the-root-cause\" >Replace the SPD or Investigate the Root Cause?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/id\/spd-maintenance-checklist\/#spd-maintenance-handover-checklist-for-panel-builders\" >SPD Maintenance Handover Checklist for Panel Builders<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/id\/spd-maintenance-checklist\/#how-many-spare-spd-modules-should-a-site-keep\" >How Many Spare SPD Modules Should a Site Keep?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/id\/spd-maintenance-checklist\/#spd-maintenance-record-template\" >SPD Maintenance Record Template<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/id\/spd-maintenance-checklist\/#application-specific-spd-maintenance-notes\" >Application-Specific SPD Maintenance Notes<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/id\/spd-maintenance-checklist\/#frequently-asked-questions\" >Frequently Asked Questions<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/id\/spd-maintenance-checklist\/#related-spd-maintenance-guides\" >Related SPD Maintenance Guides<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/id\/spd-maintenance-checklist\/#authoritative-technical-sources\" >Authoritative Technical Sources<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/id\/spd-maintenance-checklist\/#need-an-spd-configuration-designed-for-easier-maintenance\" >Need an SPD Configuration Designed for Easier Maintenance?<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"recommended-spd-inspection-schedule\"><\/span>Recommended SPD Inspection Schedule<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n            <p class=\"lym-section-intro\">\r\n                The schedule below is a practical preventive-maintenance framework,\r\n                not a universal legal interval. High-lightning locations, remote\r\n                sites, critical production lines and installations with repeated\r\n                surge events may require shorter intervals.\r\n            <\/p>\r\n\r\n            <figure class=\"lym-figure\">\r\n                <div class=\"lym-figure-frame\">\r\n                    <img loading=\"lazy\"\r\n                        src=\"https:\/\/www.cnspd.com\/wp-content\/uploads\/2026\/07\/spd-maintenance-inspection-schedule.webp\"\r\n                        alt=\"Recommended SPD maintenance inspection schedule with routine, planned, annual and event-triggered checks\"\r\n                        width=\"1448\"\r\n                        height=\"1086\"\r\n                        loading=\"lazy\"\r\n                        decoding=\"async\">\r\n                <\/div>\r\n\r\n                <figcaption>\r\n                    A risk-based SPD maintenance schedule combines routine checks,\r\n                    planned panel inspections, annual reviews and immediate\r\n                    event-triggered inspections.\r\n                <\/figcaption>\r\n            <\/figure>\r\n\r\n            <div class=\"lym-schedule-grid\">\r\n                <article class=\"lym-schedule-card\">\r\n                    <div class=\"lym-schedule-number\">01<\/div>\r\n\r\n                    <div class=\"lym-schedule-content\">\r\n                        <span class=\"lym-frequency\">\r\n                            Routine \/ Monthly\r\n                        <\/span>\r\n\r\n                        <h3>Visual status check<\/h3>\r\n\r\n                        <p>\r\n                            Check visible indicators, remote alarms,\r\n                            backup-protection status and obvious signs of heat,\r\n                            moisture or physical damage during normal site rounds.\r\n                        <\/p>\r\n                    <\/div>\r\n                <\/article>\r\n\r\n                <article class=\"lym-schedule-card\">\r\n                    <div class=\"lym-schedule-number\">02<\/div>\r\n\r\n                    <div class=\"lym-schedule-content\">\r\n                        <span class=\"lym-frequency\">\r\n                            Quarterly or Semiannual\r\n                        <\/span>\r\n\r\n                        <h3>Planned panel inspection<\/h3>\r\n\r\n                        <p>\r\n                            During an authorised maintenance window, inspect\r\n                            terminals, PE connections, cartridge seating, conductor\r\n                            routing, corrosion and thermal condition.\r\n                        <\/p>\r\n                    <\/div>\r\n                <\/article>\r\n\r\n                <article class=\"lym-schedule-card\">\r\n                    <div class=\"lym-schedule-number\">03<\/div>\r\n\r\n                    <div class=\"lym-schedule-content\">\r\n                        <span class=\"lym-frequency\">\r\n                            Annual\r\n                        <\/span>\r\n\r\n                        <h3>Documented system review<\/h3>\r\n\r\n                        <p>\r\n                            Reconcile installed SPDs with drawings and records. Test\r\n                            remote indication, review failures, update spare stock\r\n                            and close outstanding corrective actions.\r\n                        <\/p>\r\n                    <\/div>\r\n                <\/article>\r\n\r\n                <article class=\"lym-schedule-card lym-schedule-card-event\">\r\n                    <div class=\"lym-schedule-number\">04<\/div>\r\n\r\n                    <div class=\"lym-schedule-content\">\r\n                        <span class=\"lym-frequency\">\r\n                            Event Triggered\r\n                        <\/span>\r\n\r\n                        <h3>Immediate additional inspection<\/h3>\r\n\r\n                        <p>\r\n                            Inspect after suspected lightning, an SPD alarm, backup\r\n                            fuse or breaker operation, unexplained equipment failure,\r\n                            water ingress or electrical-system modification.\r\n                        <\/p>\r\n                    <\/div>\r\n                <\/article>\r\n            <\/div>\r\n\r\n            <div class=\"lym-callout lym-callout-blue\">\r\n                <strong>Use a risk-based interval<\/strong>\r\n\r\n                <p>\r\n                    A monthly check may mean looking through a transparent panel\r\n                    window or reviewing a BMS alarm. It does not mean opening a live\r\n                    switchboard every month. Internal work must follow the site's\r\n                    electrical safety and isolation procedure.\r\n                <\/p>\r\n            <\/div>\r\n        <\/section>\r\n\r\n        <section id=\"maintenance-checklist\">\r\n            <h2><span class=\"ez-toc-section\" id=\"complete-spd-maintenance-checklist\"><\/span>Complete SPD Maintenance Checklist<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n            <p class=\"lym-section-intro\">\r\n                Use this field checklist for low-voltage AC, PV DC and industrial\r\n                control panels. Add any product-specific checks required by the\r\n                installed SPD manufacturer's instructions.\r\n            <\/p>\r\n\r\n            <figure class=\"lym-figure\">\r\n                <div class=\"lym-figure-frame\">\r\n                    <img loading=\"lazy\"\r\n                        src=\"https:\/\/www.cnspd.com\/wp-content\/uploads\/2026\/07\/spd-panel-maintenance-inspection-points.webp\"\r\n                        alt=\"Electrical panel diagram showing the main SPD maintenance inspection points\"\r\n                        width=\"1448\"\r\n                        height=\"1086\"\r\n                        loading=\"lazy\"\r\n                        decoding=\"async\">\r\n                <\/div>\r\n\r\n                <figcaption>\r\n                    Main inspection points include the status indicator,\r\n                    replaceable cartridge, remote contact, power and PE conductors,\r\n                    backup protection, enclosure condition and identification labels.\r\n                <\/figcaption>\r\n            <\/figure>\r\n\r\n            <div class=\"lym-checklist-section\">\r\n                <div class=\"lym-checklist-heading\">\r\n                    A. Asset and design verification\r\n                <\/div>\r\n\r\n                <div class=\"lym-checklist-grid\">\r\n\r\n                    <article class=\"lym-check-card\">\r\n                        <div class=\"lym-check-card-head\">\r\n                            <span class=\"lym-checkbox\">\u2713<\/span>\r\n\r\n                            <div class=\"lym-check-card-title\">\r\n                                Panel and SPD identification\r\n                            <\/div>\r\n\r\n                            <span class=\"lym-timing\">\r\n                                Annual \/ Commissioning\r\n                            <\/span>\r\n                        <\/div>\r\n\r\n                        <div class=\"lym-check-card-body\">\r\n                            <div class=\"lym-check-detail\">\r\n                                <span class=\"lym-detail-label\">Pass criteria<\/span>\r\n\r\n                                <p>\r\n                                    Site, panel ID, circuit, SPD model, pole\r\n                                    configuration and installation location match\r\n                                    the maintenance register.\r\n                                <\/p>\r\n                            <\/div>\r\n\r\n                            <div class=\"lym-check-detail\">\r\n                                <span class=\"lym-detail-label\">\r\n                                    Action if abnormal\r\n                                <\/span>\r\n\r\n                                <p>\r\n                                    Correct the asset register and label the panel\r\n                                    before closing the inspection.\r\n                                <\/p>\r\n                            <\/div>\r\n                        <\/div>\r\n                    <\/article>\r\n\r\n                    <article class=\"lym-check-card\">\r\n                        <div class=\"lym-check-card-head\">\r\n                            <span class=\"lym-checkbox\">\u2713<\/span>\r\n\r\n                            <div class=\"lym-check-card-title\">\r\n                                Electrical ratings\r\n                            <\/div>\r\n\r\n                            <span class=\"lym-timing\">\r\n                                Annual \/ Replacement\r\n                            <\/span>\r\n                        <\/div>\r\n\r\n                        <div class=\"lym-check-card-body\">\r\n                            <div class=\"lym-check-detail\">\r\n                                <span class=\"lym-detail-label\">Pass criteria<\/span>\r\n\r\n                                <p>\r\n                                    SPD Type, Uc or Ucpv, In, Imax or Iimp, poles and\r\n                                    protection modes match the approved design.\r\n                                <\/p>\r\n                            <\/div>\r\n\r\n                            <div class=\"lym-check-detail\">\r\n                                <span class=\"lym-detail-label\">\r\n                                    Action if abnormal\r\n                                <\/span>\r\n\r\n                                <p>\r\n                                    Escalate for engineering review. Do not select a\r\n                                    replacement only by matching its external\r\n                                    dimensions.\r\n                                <\/p>\r\n                            <\/div>\r\n                        <\/div>\r\n                    <\/article>\r\n\r\n                    <article class=\"lym-check-card\">\r\n                        <div class=\"lym-check-card-head\">\r\n                            <span class=\"lym-checkbox\">\u2713<\/span>\r\n\r\n                            <div class=\"lym-check-card-title\">\r\n                                System configuration\r\n                            <\/div>\r\n\r\n                            <span class=\"lym-timing\">\r\n                                Annual \/ After Modification\r\n                            <\/span>\r\n                        <\/div>\r\n\r\n                        <div class=\"lym-check-card-body\">\r\n                            <div class=\"lym-check-detail\">\r\n                                <span class=\"lym-detail-label\">Pass criteria<\/span>\r\n\r\n                                <p>\r\n                                    The installed SPD arrangement remains suitable\r\n                                    for the earthing system, AC or DC application and\r\n                                    actual system voltage.\r\n                                <\/p>\r\n                            <\/div>\r\n\r\n                            <div class=\"lym-check-detail\">\r\n                                <span class=\"lym-detail-label\">\r\n                                    Action if abnormal\r\n                                <\/span>\r\n\r\n                                <p>\r\n                                    Review the original design and later electrical\r\n                                    modifications before installing a replacement.\r\n                                <\/p>\r\n                            <\/div>\r\n                        <\/div>\r\n                    <\/article>\r\n\r\n                <\/div>\r\n            <\/div>\r\n\r\n            <div class=\"lym-checklist-section\">\r\n                <div class=\"lym-checklist-heading\">\r\n                    B. Status and remote monitoring\r\n                <\/div>\r\n\r\n                <div class=\"lym-checklist-grid\">\r\n\r\n                    <article class=\"lym-check-card\">\r\n                        <div class=\"lym-check-card-head\">\r\n                            <span class=\"lym-checkbox\">\u2713<\/span>\r\n\r\n                            <div class=\"lym-check-card-title\">\r\n                                Visual status indicator\r\n                            <\/div>\r\n\r\n                            <span class=\"lym-timing\">\r\n                                Every Visit\r\n                            <\/span>\r\n                        <\/div>\r\n\r\n                        <div class=\"lym-check-card-body\">\r\n                            <div class=\"lym-check-detail\">\r\n                                <span class=\"lym-detail-label\">Pass criteria<\/span>\r\n\r\n                                <p>\r\n                                    Every pole or cartridge shows the manufacturer's\r\n                                    documented normal state. No plug is missing or\r\n                                    partially inserted.\r\n                                <\/p>\r\n                            <\/div>\r\n\r\n                            <div class=\"lym-check-detail\">\r\n                                <span class=\"lym-detail-label\">\r\n                                    Action if abnormal\r\n                                <\/span>\r\n\r\n                                <p>\r\n                                    Replace the affected cartridge or complete unit\r\n                                    when the displayed state is defined as end of life.\r\n                                <\/p>\r\n                            <\/div>\r\n                        <\/div>\r\n                    <\/article>\r\n\r\n                    <article class=\"lym-check-card\">\r\n                        <div class=\"lym-check-card-head\">\r\n                            <span class=\"lym-checkbox\">\u2713<\/span>\r\n\r\n                            <div class=\"lym-check-card-title\">\r\n                                Indicator interpretation\r\n                            <\/div>\r\n\r\n                            <span class=\"lym-timing\">\r\n                                Every Visit\r\n                            <\/span>\r\n                        <\/div>\r\n\r\n                        <div class=\"lym-check-card-body\">\r\n                            <div class=\"lym-check-detail\">\r\n                                <span class=\"lym-detail-label\">Pass criteria<\/span>\r\n\r\n                                <p>\r\n                                    The technician confirms the meaning of green,\r\n                                    red, dark, flashing or mechanical indicator\r\n                                    states from the correct instructions.\r\n                                <\/p>\r\n                            <\/div>\r\n\r\n                            <div class=\"lym-check-detail\">\r\n                                <span class=\"lym-detail-label\">\r\n                                    Action if abnormal\r\n                                <\/span>\r\n\r\n                                <p>\r\n                                    Do not assume every dark LED means failure or\r\n                                    that every green window proves full remaining\r\n                                    surge capacity.\r\n                                <\/p>\r\n                            <\/div>\r\n                        <\/div>\r\n                    <\/article>\r\n\r\n                    <article class=\"lym-check-card\">\r\n                        <div class=\"lym-check-card-head\">\r\n                            <span class=\"lym-checkbox\">\u2713<\/span>\r\n\r\n                            <div class=\"lym-check-card-title\">\r\n                                Remote indication contact\r\n                            <\/div>\r\n\r\n                            <span class=\"lym-timing\">\r\n                                Annual \/ Commissioning\r\n                            <\/span>\r\n                        <\/div>\r\n\r\n                        <div class=\"lym-check-card-body\">\r\n                            <div class=\"lym-check-detail\">\r\n                                <span class=\"lym-detail-label\">Pass criteria<\/span>\r\n\r\n                                <p>\r\n                                    NO, NC and COM logic matches the drawing and local\r\n                                    indication. The PLC, BMS or SCADA receives the\r\n                                    expected state.\r\n                                <\/p>\r\n                            <\/div>\r\n\r\n                            <div class=\"lym-check-detail\">\r\n                                <span class=\"lym-detail-label\">\r\n                                    Action if abnormal\r\n                                <\/span>\r\n\r\n                                <p>\r\n                                    Check contact wiring, auxiliary supply, alarm\r\n                                    mapping and the manufacturer's approved test method.\r\n                                <\/p>\r\n                            <\/div>\r\n                        <\/div>\r\n                    <\/article>\r\n\r\n                    <article class=\"lym-check-card\">\r\n                        <div class=\"lym-check-card-head\">\r\n                            <span class=\"lym-checkbox\">\u2713<\/span>\r\n\r\n                            <div class=\"lym-check-card-title\">\r\n                                Alarm identification\r\n                            <\/div>\r\n\r\n                            <span class=\"lym-timing\">\r\n                                Annual\r\n                            <\/span>\r\n                        <\/div>\r\n\r\n                        <div class=\"lym-check-card-body\">\r\n                            <div class=\"lym-check-detail\">\r\n                                <span class=\"lym-detail-label\">Pass criteria<\/span>\r\n\r\n                                <p>\r\n                                    The alarm identifies the correct site, panel or\r\n                                    SPD group instead of showing an unidentified\r\n                                    general alarm.\r\n                                <\/p>\r\n                            <\/div>\r\n\r\n                            <div class=\"lym-check-detail\">\r\n                                <span class=\"lym-detail-label\">\r\n                                    Action if abnormal\r\n                                <\/span>\r\n\r\n                                <p>\r\n                                    Update PLC or BMS naming and the alarm escalation\r\n                                    instructions.\r\n                                <\/p>\r\n                            <\/div>\r\n                        <\/div>\r\n                    <\/article>\r\n\r\n                <\/div>\r\n            <\/div>\r\n\r\n            <div class=\"lym-checklist-section\">\r\n                <div class=\"lym-checklist-heading\">\r\n                    C. Wiring, terminals and protective coordination\r\n                <\/div>\r\n\r\n                <div class=\"lym-checklist-grid\">\r\n\r\n                    <article class=\"lym-check-card\">\r\n                        <div class=\"lym-check-card-head\">\r\n                            <span class=\"lym-checkbox\">\u2713<\/span>\r\n\r\n                            <div class=\"lym-check-card-title\">\r\n                                Line, neutral and DC conductors\r\n                            <\/div>\r\n\r\n                            <span class=\"lym-timing\">\r\n                                Planned Inspection\r\n                            <\/span>\r\n                        <\/div>\r\n\r\n                        <div class=\"lym-check-card-body\">\r\n                            <div class=\"lym-check-detail\">\r\n                                <span class=\"lym-detail-label\">Pass criteria<\/span>\r\n\r\n                                <p>\r\n                                    Conductors are correctly routed and free from\r\n                                    damaged insulation, exposed copper, crushing or\r\n                                    abnormal bending.\r\n                                <\/p>\r\n                            <\/div>\r\n\r\n                            <div class=\"lym-check-detail\">\r\n                                <span class=\"lym-detail-label\">\r\n                                    Action if abnormal\r\n                                <\/span>\r\n\r\n                                <p>\r\n                                    Isolate the panel and repair or replace damaged\r\n                                    conductors.\r\n                                <\/p>\r\n                            <\/div>\r\n                        <\/div>\r\n                    <\/article>\r\n\r\n                    <article class=\"lym-check-card\">\r\n                        <div class=\"lym-check-card-head\">\r\n                            <span class=\"lym-checkbox\">\u2713<\/span>\r\n\r\n                            <div class=\"lym-check-card-title\">\r\n                                Terminal condition\r\n                            <\/div>\r\n\r\n                            <span class=\"lym-timing\">\r\n                                Planned Inspection\r\n                            <\/span>\r\n                        <\/div>\r\n\r\n                        <div class=\"lym-check-card-body\">\r\n                            <div class=\"lym-check-detail\">\r\n                                <span class=\"lym-detail-label\">Pass criteria<\/span>\r\n\r\n                                <p>\r\n                                    No loosening, discoloration, carbon deposits,\r\n                                    melting or arcing are visible at SPD or\r\n                                    backup-protection terminals.\r\n                                <\/p>\r\n                            <\/div>\r\n\r\n                            <div class=\"lym-check-detail\">\r\n                                <span class=\"lym-detail-label\">\r\n                                    Action if abnormal\r\n                                <\/span>\r\n\r\n                                <p>\r\n                                    De-energise the panel, inspect the conductor and\r\n                                    terminal, and replace heat-damaged components.\r\n                                <\/p>\r\n                            <\/div>\r\n                        <\/div>\r\n                    <\/article>\r\n\r\n                    <article class=\"lym-check-card\">\r\n                        <div class=\"lym-check-card-head\">\r\n                            <span class=\"lym-checkbox\">\u2713<\/span>\r\n\r\n                            <div class=\"lym-check-card-title\">\r\n                                Terminal torque\r\n                            <\/div>\r\n\r\n                            <span class=\"lym-timing\">\r\n                                Planned Shutdown\r\n                            <\/span>\r\n                        <\/div>\r\n\r\n                        <div class=\"lym-check-card-body\">\r\n                            <div class=\"lym-check-detail\">\r\n                                <span class=\"lym-detail-label\">Pass criteria<\/span>\r\n\r\n                                <p>\r\n                                    Connections comply with the value specified for\r\n                                    the particular SPD, base, fuse holder or circuit\r\n                                    breaker.\r\n                                <\/p>\r\n                            <\/div>\r\n\r\n                            <div class=\"lym-check-detail\">\r\n                                <span class=\"lym-detail-label\">\r\n                                    Action if abnormal\r\n                                <\/span>\r\n\r\n                                <p>\r\n                                    Re-terminate only under safe isolation and to the\r\n                                    manufacturer's stated value. Do not use a generic\r\n                                    torque figure.\r\n                                <\/p>\r\n                            <\/div>\r\n                        <\/div>\r\n                    <\/article>\r\n\r\n                    <article class=\"lym-check-card\">\r\n                        <div class=\"lym-check-card-head\">\r\n                            <span class=\"lym-checkbox\">\u2713<\/span>\r\n\r\n                            <div class=\"lym-check-card-title\">\r\n                                Connection length and routing\r\n                            <\/div>\r\n\r\n                            <span class=\"lym-timing\">\r\n                                Annual \/ After Modification\r\n                            <\/span>\r\n                        <\/div>\r\n\r\n                        <div class=\"lym-check-card-body\">\r\n                            <div class=\"lym-check-detail\">\r\n                                <span class=\"lym-detail-label\">Pass criteria<\/span>\r\n\r\n                                <p>\r\n                                    SPD conductors remain short and direct. Later\r\n                                    modifications have not introduced loops or\r\n                                    unnecessary conductor length.\r\n                                <\/p>\r\n                            <\/div>\r\n\r\n                            <div class=\"lym-check-detail\">\r\n                                <span class=\"lym-detail-label\">\r\n                                    Action if abnormal\r\n                                <\/span>\r\n\r\n                                <p>\r\n                                    Redesign routing where lead voltage could increase\r\n                                    the effective protection level at the equipment.\r\n                                <\/p>\r\n                            <\/div>\r\n                        <\/div>\r\n                    <\/article>\r\n\r\n                    <article class=\"lym-check-card\">\r\n                        <div class=\"lym-check-card-head\">\r\n                            <span class=\"lym-checkbox\">\u2713<\/span>\r\n\r\n                            <div class=\"lym-check-card-title\">\r\n                                Backup fuse or circuit breaker\r\n                            <\/div>\r\n\r\n                            <span class=\"lym-timing\">\r\n                                Every Visit\r\n                            <\/span>\r\n                        <\/div>\r\n\r\n                        <div class=\"lym-check-card-body\">\r\n                            <div class=\"lym-check-detail\">\r\n                                <span class=\"lym-detail-label\">Pass criteria<\/span>\r\n\r\n                                <p>\r\n                                    The device is present, operational and rated\r\n                                    according to the manufacturer's coordination\r\n                                    requirements.\r\n                                <\/p>\r\n                            <\/div>\r\n\r\n                            <div class=\"lym-check-detail\">\r\n                                <span class=\"lym-detail-label\">\r\n                                    Action if abnormal\r\n                                <\/span>\r\n\r\n                                <p>\r\n                                    Investigate why it operated. Do not simply reset\r\n                                    the breaker or replace the fuse without inspecting\r\n                                    the SPD.\r\n                                <\/p>\r\n                            <\/div>\r\n                        <\/div>\r\n                    <\/article>\r\n\r\n                <\/div>\r\n            <\/div>\r\n\r\n            <div class=\"lym-checklist-section\">\r\n                <div class=\"lym-checklist-heading\">\r\n                    D. PE, bonding and enclosure condition\r\n                <\/div>\r\n\r\n                <div class=\"lym-checklist-grid\">\r\n\r\n                    <article class=\"lym-check-card\">\r\n                        <div class=\"lym-check-card-head\">\r\n                            <span class=\"lym-checkbox\">\u2713<\/span>\r\n\r\n                            <div class=\"lym-check-card-title\">\r\n                                PE conductor and bonding\r\n                            <\/div>\r\n\r\n                            <span class=\"lym-timing\">\r\n                                Planned Inspection\r\n                            <\/span>\r\n                        <\/div>\r\n\r\n                        <div class=\"lym-check-card-body\">\r\n                            <div class=\"lym-check-detail\">\r\n                                <span class=\"lym-detail-label\">Pass criteria<\/span>\r\n\r\n                                <p>\r\n                                    The PE connection is secure, short, correctly\r\n                                    routed and free from corrosion. Required\r\n                                    equipotential bonding remains intact.\r\n                                <\/p>\r\n                            <\/div>\r\n\r\n                            <div class=\"lym-check-detail\">\r\n                                <span class=\"lym-detail-label\">\r\n                                    Action if abnormal\r\n                                <\/span>\r\n\r\n                                <p>\r\n                                    Repair the connection and investigate changes to\r\n                                    the site's bonding arrangement.\r\n                                <\/p>\r\n                            <\/div>\r\n                        <\/div>\r\n                    <\/article>\r\n\r\n                    <article class=\"lym-check-card\">\r\n                        <div class=\"lym-check-card-head\">\r\n                            <span class=\"lym-checkbox\">\u2713<\/span>\r\n\r\n                            <div class=\"lym-check-card-title\">\r\n                                Earthing assessment\r\n                            <\/div>\r\n\r\n                            <span class=\"lym-timing\">\r\n                                Annual \/ After Earth Work\r\n                            <\/span>\r\n                        <\/div>\r\n\r\n                        <div class=\"lym-check-card-body\">\r\n                            <div class=\"lym-check-detail\">\r\n                                <span class=\"lym-detail-label\">Pass criteria<\/span>\r\n\r\n                                <p>\r\n                                    Site earthing and bonding continue to match the\r\n                                    project design and applicable installation rules.\r\n                                <\/p>\r\n                            <\/div>\r\n\r\n                            <div class=\"lym-check-detail\">\r\n                                <span class=\"lym-detail-label\">\r\n                                    Action if abnormal\r\n                                <\/span>\r\n\r\n                                <p>\r\n                                    Do not judge SPD effectiveness from one universal\r\n                                    resistance value. Review the complete surge-current\r\n                                    path.\r\n                                <\/p>\r\n                            <\/div>\r\n                        <\/div>\r\n                    <\/article>\r\n\r\n                    <article class=\"lym-check-card\">\r\n                        <div class=\"lym-check-card-head\">\r\n                            <span class=\"lym-checkbox\">\u2713<\/span>\r\n\r\n                            <div class=\"lym-check-card-title\">\r\n                                Housing and cartridge condition\r\n                            <\/div>\r\n\r\n                            <span class=\"lym-timing\">\r\n                                Every Visit\r\n                            <\/span>\r\n                        <\/div>\r\n\r\n                        <div class=\"lym-check-card-body\">\r\n                            <div class=\"lym-check-detail\">\r\n                                <span class=\"lym-detail-label\">Pass criteria<\/span>\r\n\r\n                                <p>\r\n                                    No cracking, deformation, loose plug, broken\r\n                                    locking feature, soot, scorch marks or melted\r\n                                    plastic.\r\n                                <\/p>\r\n                            <\/div>\r\n\r\n                            <div class=\"lym-check-detail\">\r\n                                <span class=\"lym-detail-label\">\r\n                                    Action if abnormal\r\n                                <\/span>\r\n\r\n                                <p>\r\n                                    Isolate and replace damaged parts. Inspect the\r\n                                    surrounding panel before re-energising.\r\n                                <\/p>\r\n                            <\/div>\r\n                        <\/div>\r\n                    <\/article>\r\n\r\n                    <article class=\"lym-check-card\">\r\n                        <div class=\"lym-check-card-head\">\r\n                            <span class=\"lym-checkbox\">\u2713<\/span>\r\n\r\n                            <div class=\"lym-check-card-title\">\r\n                                Temperature and odour\r\n                            <\/div>\r\n\r\n                            <span class=\"lym-timing\">\r\n                                Every Visit \/ Thermal Survey\r\n                            <\/span>\r\n                        <\/div>\r\n\r\n                        <div class=\"lym-check-card-body\">\r\n                            <div class=\"lym-check-detail\">\r\n                                <span class=\"lym-detail-label\">Pass criteria<\/span>\r\n\r\n                                <p>\r\n                                    No abnormal heat, burning smell or unusual\r\n                                    temperature difference is found around the SPD\r\n                                    and adjacent components.\r\n                                <\/p>\r\n                            <\/div>\r\n\r\n                            <div class=\"lym-check-detail\">\r\n                                <span class=\"lym-detail-label\">\r\n                                    Action if abnormal\r\n                                <\/span>\r\n\r\n                                <p>\r\n                                    Arrange a safe thermal investigation and inspect\r\n                                    terminals, loading, ventilation and nearby heat\r\n                                    sources.\r\n                                <\/p>\r\n                            <\/div>\r\n                        <\/div>\r\n                    <\/article>\r\n\r\n                    <article class=\"lym-check-card\">\r\n                        <div class=\"lym-check-card-head\">\r\n                            <span class=\"lym-checkbox\">\u2713<\/span>\r\n\r\n                            <div class=\"lym-check-card-title\">\r\n                                Moisture, dust and corrosion\r\n                            <\/div>\r\n\r\n                            <span class=\"lym-timing\">\r\n                                Every Visit\r\n                            <\/span>\r\n                        <\/div>\r\n\r\n                        <div class=\"lym-check-card-body\">\r\n                            <div class=\"lym-check-detail\">\r\n                                <span class=\"lym-detail-label\">Pass criteria<\/span>\r\n\r\n                                <p>\r\n                                    The enclosure is dry and clean. Cable entries,\r\n                                    seals, vents and drainage prevent environmental\r\n                                    contamination.\r\n                                <\/p>\r\n                            <\/div>\r\n\r\n                            <div class=\"lym-check-detail\">\r\n                                <span class=\"lym-detail-label\">\r\n                                    Action if abnormal\r\n                                <\/span>\r\n\r\n                                <p>\r\n                                    Correct the enclosure problem before fitting\r\n                                    another SPD.\r\n                                <\/p>\r\n                            <\/div>\r\n                        <\/div>\r\n                    <\/article>\r\n\r\n                <\/div>\r\n            <\/div>\r\n\r\n            <div class=\"lym-checklist-section\">\r\n                <div class=\"lym-checklist-heading\">\r\n                    E. Records, replacement and spare stock\r\n                <\/div>\r\n\r\n                <div class=\"lym-checklist-grid\">\r\n\r\n                    <article class=\"lym-check-card\">\r\n                        <div class=\"lym-check-card-head\">\r\n                            <span class=\"lym-checkbox\">\u2713<\/span>\r\n\r\n                            <div class=\"lym-check-card-title\">\r\n                                Event and replacement history\r\n                            <\/div>\r\n\r\n                            <span class=\"lym-timing\">\r\n                                Every Inspection\r\n                            <\/span>\r\n                        <\/div>\r\n\r\n                        <div class=\"lym-check-card-body\">\r\n                            <div class=\"lym-check-detail\">\r\n                                <span class=\"lym-detail-label\">Pass criteria<\/span>\r\n\r\n                                <p>\r\n                                    Lightning events, alarms, breaker operation,\r\n                                    replacements and unexplained equipment faults\r\n                                    have been recorded.\r\n                                <\/p>\r\n                            <\/div>\r\n\r\n                            <div class=\"lym-check-detail\">\r\n                                <span class=\"lym-detail-label\">\r\n                                    Action if abnormal\r\n                                <\/span>\r\n\r\n                                <p>\r\n                                    Reconstruct the history from BMS logs, work orders\r\n                                    and maintenance reports where possible.\r\n                                <\/p>\r\n                            <\/div>\r\n                        <\/div>\r\n                    <\/article>\r\n\r\n                    <article class=\"lym-check-card\">\r\n                        <div class=\"lym-check-card-head\">\r\n                            <span class=\"lym-checkbox\">\u2713<\/span>\r\n\r\n                            <div class=\"lym-check-card-title\">\r\n                                Correct replacement cartridge\r\n                            <\/div>\r\n\r\n                            <span class=\"lym-timing\">\r\n                                Before Replacement\r\n                            <\/span>\r\n                        <\/div>\r\n\r\n                        <div class=\"lym-check-card-body\">\r\n                            <div class=\"lym-check-detail\">\r\n                                <span class=\"lym-detail-label\">Pass criteria<\/span>\r\n\r\n                                <p>\r\n                                    The spare matches the full model, ratings, poles,\r\n                                    protection mode and compatible plug base.\r\n                                <\/p>\r\n                            <\/div>\r\n\r\n                            <div class=\"lym-check-detail\">\r\n                                <span class=\"lym-detail-label\">\r\n                                    Action if abnormal\r\n                                <\/span>\r\n\r\n                                <p>\r\n                                    Quarantine unmatched stock. Do not install a\r\n                                    visually similar cartridge without technical\r\n                                    confirmation.\r\n                                <\/p>\r\n                            <\/div>\r\n                        <\/div>\r\n                    <\/article>\r\n\r\n                    <article class=\"lym-check-card\">\r\n                        <div class=\"lym-check-card-head\">\r\n                            <span class=\"lym-checkbox\">\u2713<\/span>\r\n\r\n                            <div class=\"lym-check-card-title\">\r\n                                Corrective-action closure\r\n                            <\/div>\r\n\r\n                            <span class=\"lym-timing\">\r\n                                After Every Failure\r\n                            <\/span>\r\n                        <\/div>\r\n\r\n                        <div class=\"lym-check-card-body\">\r\n                            <div class=\"lym-check-detail\">\r\n                                <span class=\"lym-detail-label\">Pass criteria<\/span>\r\n\r\n                                <p>\r\n                                    Defect owner, action, target date, completion\r\n                                    evidence and reviewer approval are documented.\r\n                                <\/p>\r\n                            <\/div>\r\n\r\n                            <div class=\"lym-check-detail\">\r\n                                <span class=\"lym-detail-label\">\r\n                                    Action if abnormal\r\n                                <\/span>\r\n\r\n                                <p>\r\n                                    Keep the work order open until protection is\r\n                                    restored and the underlying cause is addressed.\r\n                                <\/p>\r\n                            <\/div>\r\n                        <\/div>\r\n                    <\/article>\r\n\r\n                <\/div>\r\n            <\/div>\r\n\r\n            <div class=\"lym-callout lym-callout-amber\">\r\n                <strong>Important testing limitation<\/strong>\r\n\r\n                <p>\r\n                    A standard multimeter or insulation resistance test does not, by\r\n                    itself, prove that an SPD still has its original voltage\r\n                    protection level or remaining discharge capacity. Where\r\n                    electrical condition testing is required, follow the\r\n                    manufacturer's approved equipment and procedure.\r\n                <\/p>\r\n            <\/div>\r\n        <\/section>\r\n\r\n        <section id=\"safe-workflow\">\r\n            <h2><span class=\"ez-toc-section\" id=\"safe-spd-inspection-workflow\"><\/span>Safe SPD Inspection Workflow<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n            <p class=\"lym-section-intro\">\r\n                Internal inspection, tightening, unplugging and replacement must be\r\n                carried out by appropriately qualified personnel under the site's\r\n                electrical safety procedure.\r\n            <\/p>\r\n\r\n            <div class=\"lym-workflow\">\r\n                <div class=\"lym-workflow-step\">\r\n                    <strong>1. Identify<\/strong>\r\n                    <span>Confirm the site, panel, circuit and exact SPD model.<\/span>\r\n                <\/div>\r\n\r\n                <div class=\"lym-workflow-step\">\r\n                    <strong>2. Review<\/strong>\r\n                    <span>Check drawings, previous alarms and records.<\/span>\r\n                <\/div>\r\n\r\n                <div class=\"lym-workflow-step\">\r\n                    <strong>3. Isolate<\/strong>\r\n                    <span>Apply the approved shutdown and lockout process.<\/span>\r\n                <\/div>\r\n\r\n                <div class=\"lym-workflow-step\">\r\n                    <strong>4. Inspect<\/strong>\r\n                    <span>Complete visual, wiring and signal checks.<\/span>\r\n                <\/div>\r\n\r\n                <div class=\"lym-workflow-step\">\r\n                    <strong>5. Close<\/strong>\r\n                    <span>Replace, verify, document and replenish stock.<\/span>\r\n                <\/div>\r\n            <\/div>\r\n\r\n            <div class=\"lym-callout lym-callout-red\">\r\n                <strong>Do not rely on the indicator alone<\/strong>\r\n\r\n                <p>\r\n                    An SPD showing a normal local indicator may still be incorrectly\r\n                    selected, poorly connected or disconnected by an open backup\r\n                    protective device. The indicator is one inspection point, not\r\n                    the complete maintenance result.\r\n                <\/p>\r\n            <\/div>\r\n        <\/section>\r\n\r\n        <section id=\"routine-inspection\">\r\n            <h2><span class=\"ez-toc-section\" id=\"routine-visual-inspection\"><\/span>Routine Visual Inspection<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n            <p>\r\n                Routine checks should be fast enough to include in normal electrical\r\n                rounds. They should focus on conditions that can be seen or reported\r\n                without disturbing an energised panel.\r\n            <\/p>\r\n\r\n            <div class=\"lym-grid-3\">\r\n                <article class=\"lym-card\">\r\n                    <div class=\"lym-number\">01<\/div>\r\n\r\n                    <h3>Indicator status<\/h3>\r\n\r\n                    <ul>\r\n                        <li>Check every pole or cartridge.<\/li>\r\n                        <li>Record the displayed state.<\/li>\r\n                        <li>Confirm its meaning from the instructions.<\/li>\r\n                        <li>Photograph abnormal indications.<\/li>\r\n                    <\/ul>\r\n                <\/article>\r\n\r\n                <article class=\"lym-card\">\r\n                    <div class=\"lym-number\">02<\/div>\r\n\r\n                    <h3>Alarm and backup protection<\/h3>\r\n\r\n                    <ul>\r\n                        <li>Review PLC, BMS or SCADA alarms.<\/li>\r\n                        <li>Check the backup fuse or breaker.<\/li>\r\n                        <li>Identify alarms reset without investigation.<\/li>\r\n                    <\/ul>\r\n                <\/article>\r\n\r\n                <article class=\"lym-card\">\r\n                    <div class=\"lym-number\">03<\/div>\r\n\r\n                    <h3>Environmental condition<\/h3>\r\n\r\n                    <ul>\r\n                        <li>Look for condensation and corrosion.<\/li>\r\n                        <li>Check for discoloration or melted plastic.<\/li>\r\n                        <li>Record burning odour or abnormal heat.<\/li>\r\n                    <\/ul>\r\n                <\/article>\r\n            <\/div>\r\n        <\/section>\r\n\r\n        <section id=\"planned-inspection\">\r\n            <h2><span class=\"ez-toc-section\" id=\"quarterly-or-planned-panel-inspection\"><\/span>Quarterly or Planned Panel Inspection<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n            <p>\r\n                \u201cQuarterly inspection\u201d should not automatically mean opening every\r\n                panel four times each year. Select the interval from the site risk\r\n                assessment and combine internal SPD inspection with planned\r\n                switchboard maintenance where practical.\r\n            <\/p>\r\n\r\n            <div class=\"lym-grid-2\">\r\n                <article class=\"lym-card\">\r\n                    <h3>Mechanical and electrical connections<\/h3>\r\n\r\n                    <ul>\r\n                        <li>Cartridge seating and locking features.<\/li>\r\n                        <li>Phase, neutral, DC and PE conductors.<\/li>\r\n                        <li>Terminal condition and specified torque.<\/li>\r\n                        <li>Backup fuse or circuit-breaker rating.<\/li>\r\n                    <\/ul>\r\n                <\/article>\r\n\r\n                <article class=\"lym-card\">\r\n                    <h3>Panel and environmental condition<\/h3>\r\n\r\n                    <ul>\r\n                        <li>Thermal damage and discoloration.<\/li>\r\n                        <li>Conductor length and routing.<\/li>\r\n                        <li>Corrosion and moisture entry.<\/li>\r\n                        <li>Remote-contact wiring security.<\/li>\r\n                    <\/ul>\r\n                <\/article>\r\n            <\/div>\r\n\r\n            <div class=\"lym-callout lym-callout-blue\">\r\n                <strong>Do not repeatedly tighten healthy terminals<\/strong>\r\n\r\n                <p>\r\n                    The purpose is to verify connection condition, not to apply\r\n                    uncontrolled additional torque during every visit. Follow the\r\n                    equipment manufacturer's instructions and the site's switchboard\r\n                    maintenance procedure.\r\n                <\/p>\r\n            <\/div>\r\n        <\/section>\r\n\r\n        <section id=\"annual-review\">\r\n            <h2><span class=\"ez-toc-section\" id=\"annual-documented-spd-review\"><\/span>Annual Documented SPD Review<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n            <p>\r\n                The annual review should confirm that the complete surge protection\r\n                arrangement still matches the facility, rather than only recording\r\n                that individual cartridges look normal.\r\n            <\/p>\r\n\r\n            <div class=\"lym-grid-3\">\r\n                <article class=\"lym-card\">\r\n                    <h3>Asset reconciliation<\/h3>\r\n\r\n                    <p>\r\n                        Compare the installed model and ratings with drawings, panel\r\n                        schedules and the approved bill of materials.\r\n                    <\/p>\r\n                <\/article>\r\n\r\n                <article class=\"lym-card\">\r\n                    <h3>Failure trend review<\/h3>\r\n\r\n                    <p>\r\n                        Look for repeated replacements, seasonal failures and links\r\n                        to utility switching or lightning events.\r\n                    <\/p>\r\n                <\/article>\r\n\r\n                <article class=\"lym-card\">\r\n                    <h3>Spare stock review<\/h3>\r\n\r\n                    <p>\r\n                        Check quantity, compatibility, storage condition, labels and\r\n                        lead time for critical replacement parts.\r\n                    <\/p>\r\n                <\/article>\r\n\r\n                <article class=\"lym-card\">\r\n                    <h3>Remote alarm verification<\/h3>\r\n\r\n                    <p>\r\n                        Confirm local and remote states agree and that alarms reach\r\n                        the correct maintenance team.\r\n                    <\/p>\r\n                <\/article>\r\n\r\n                <article class=\"lym-card\">\r\n                    <h3>Change management<\/h3>\r\n\r\n                    <p>\r\n                        Review transformer, generator, cable, earthing and panel\r\n                        changes that may affect SPD selection.\r\n                    <\/p>\r\n                <\/article>\r\n\r\n                <article class=\"lym-card\">\r\n                    <h3>Corrective-action closure<\/h3>\r\n\r\n                    <p>\r\n                        Confirm protection is restored and the underlying cause has\r\n                        been addressed.\r\n                    <\/p>\r\n                <\/article>\r\n            <\/div>\r\n        <\/section>\r\n\r\n        <section id=\"post-event-inspection\">\r\n            <h2><span class=\"ez-toc-section\" id=\"when-an-immediate-post-event-inspection-is-required\"><\/span>When an Immediate Post-Event Inspection Is Required<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n            <p>\r\n                Do not wait until the next scheduled inspection when there is\r\n                evidence that the installation may have experienced a significant\r\n                electrical or environmental event.\r\n            <\/p>\r\n\r\n            <div class=\"lym-event-grid\">\r\n\r\n                <article class=\"lym-event-card\">\r\n                    <div class=\"lym-event-trigger\">\r\n                        <span class=\"lym-event-icon\">01<\/span>\r\n                        <h3>Nearby lightning<\/h3>\r\n                    <\/div>\r\n\r\n                    <div class=\"lym-event-detail\">\r\n                        <span class=\"lym-detail-label\">Why it matters<\/span>\r\n\r\n                        <p>\r\n                            The SPD may have conducted surge current without causing\r\n                            an immediate equipment outage.\r\n                        <\/p>\r\n                    <\/div>\r\n\r\n                    <div class=\"lym-event-detail\">\r\n                        <span class=\"lym-detail-label\">Minimum response<\/span>\r\n\r\n                        <p>\r\n                            Inspect coordinated SPD levels, indicators, remote\r\n                            alarms, backup protection, PE connections and affected\r\n                            equipment.\r\n                        <\/p>\r\n                    <\/div>\r\n                <\/article>\r\n\r\n                <article class=\"lym-event-card\">\r\n                    <div class=\"lym-event-trigger\">\r\n                        <span class=\"lym-event-icon\">02<\/span>\r\n                        <h3>Remote SPD fault alarm<\/h3>\r\n                    <\/div>\r\n\r\n                    <div class=\"lym-event-detail\">\r\n                        <span class=\"lym-detail-label\">Why it matters<\/span>\r\n\r\n                        <p>\r\n                            A cartridge or monitored SPD group may have disconnected.\r\n                        <\/p>\r\n                    <\/div>\r\n\r\n                    <div class=\"lym-event-detail\">\r\n                        <span class=\"lym-detail-label\">Minimum response<\/span>\r\n\r\n                        <p>\r\n                            Identify the exact panel and module, verify the local\r\n                            indication and restore protection promptly.\r\n                        <\/p>\r\n                    <\/div>\r\n                <\/article>\r\n\r\n                <article class=\"lym-event-card\">\r\n                    <div class=\"lym-event-trigger\">\r\n                        <span class=\"lym-event-icon\">03<\/span>\r\n                        <h3>Backup protection operation<\/h3>\r\n                    <\/div>\r\n\r\n                    <div class=\"lym-event-detail\">\r\n                        <span class=\"lym-detail-label\">Why it matters<\/span>\r\n\r\n                        <p>\r\n                            Operation may indicate an SPD fault, short circuit or\r\n                            coordination problem.\r\n                        <\/p>\r\n                    <\/div>\r\n\r\n                    <div class=\"lym-event-detail\">\r\n                        <span class=\"lym-detail-label\">Minimum response<\/span>\r\n\r\n                        <p>\r\n                            Isolate and investigate before resetting or replacing\r\n                            the protective device.\r\n                        <\/p>\r\n                    <\/div>\r\n                <\/article>\r\n\r\n                <article class=\"lym-event-card\">\r\n                    <div class=\"lym-event-trigger\">\r\n                        <span class=\"lym-event-icon\">04<\/span>\r\n                        <h3>Equipment or communication failure<\/h3>\r\n                    <\/div>\r\n\r\n                    <div class=\"lym-event-detail\">\r\n                        <span class=\"lym-detail-label\">Why it matters<\/span>\r\n\r\n                        <p>\r\n                            The event may indicate surge activity on power, signal\r\n                            or communication lines.\r\n                        <\/p>\r\n                    <\/div>\r\n\r\n                    <div class=\"lym-event-detail\">\r\n                        <span class=\"lym-detail-label\">Minimum response<\/span>\r\n\r\n                        <p>\r\n                            Check both power and signal SPDs and review available\r\n                            event logs.\r\n                        <\/p>\r\n                    <\/div>\r\n                <\/article>\r\n\r\n                <article class=\"lym-event-card\">\r\n                    <div class=\"lym-event-trigger\">\r\n                        <span class=\"lym-event-icon\">05<\/span>\r\n                        <h3>Electrical-system modification<\/h3>\r\n                    <\/div>\r\n\r\n                    <div class=\"lym-event-detail\">\r\n                        <span class=\"lym-detail-label\">Why it matters<\/span>\r\n\r\n                        <p>\r\n                            New voltage, transformer, generator, cable or earthing\r\n                            conditions may invalidate the original SPD selection.\r\n                        <\/p>\r\n                    <\/div>\r\n\r\n                    <div class=\"lym-event-detail\">\r\n                        <span class=\"lym-detail-label\">Minimum response<\/span>\r\n\r\n                        <p>\r\n                            Recheck Uc or Ucpv, topology, backup protection,\r\n                            coordination and conductor routing.\r\n                        <\/p>\r\n                    <\/div>\r\n                <\/article>\r\n\r\n                <article class=\"lym-event-card\">\r\n                    <div class=\"lym-event-trigger\">\r\n                        <span class=\"lym-event-icon\">06<\/span>\r\n                        <h3>Water ingress or overheating<\/h3>\r\n                    <\/div>\r\n\r\n                    <div class=\"lym-event-detail\">\r\n                        <span class=\"lym-detail-label\">Why it matters<\/span>\r\n\r\n                        <p>\r\n                            Environmental damage may compromise terminals,\r\n                            insulation and protective components.\r\n                        <\/p>\r\n                    <\/div>\r\n\r\n                    <div class=\"lym-event-detail\">\r\n                        <span class=\"lym-detail-label\">Minimum response<\/span>\r\n\r\n                        <p>\r\n                            Correct the enclosure fault and inspect all affected\r\n                            devices before re-energising.\r\n                        <\/p>\r\n                    <\/div>\r\n                <\/article>\r\n\r\n            <\/div>\r\n        <\/section>\r\n\r\n        <section id=\"indicator-remote-signal\">\r\n            <h2><span class=\"ez-toc-section\" id=\"checking-the-spd-indicator-and-remote-signal\"><\/span>Checking the SPD Indicator and Remote Signal<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n            <p>\r\n                Always interpret the local indicator using the instructions for the\r\n                exact installed model. Indicator colours and LED behaviour are not\r\n                identical across all products.\r\n            <\/p>\r\n\r\n            <div class=\"lym-status-grid\">\r\n\r\n                <article class=\"lym-status-card\">\r\n                    <div class=\"lym-status-card-head\">\r\n                        <span class=\"lym-status-dot lym-status-dot-green\"><\/span>\r\n                        <h3>Normal indication<\/h3>\r\n                    <\/div>\r\n\r\n                    <div class=\"lym-status-block\">\r\n                        <span class=\"lym-detail-label\">Possible meaning<\/span>\r\n\r\n                        <p>\r\n                            The product's monitoring mechanism currently reports its\r\n                            normal state.\r\n                        <\/p>\r\n                    <\/div>\r\n\r\n                    <div class=\"lym-status-block\">\r\n                        <span class=\"lym-detail-label\">Maintenance response<\/span>\r\n\r\n                        <p>\r\n                            Continue the remaining checklist. The indicator does not\r\n                            prove correct selection, wiring or full remaining capacity.\r\n                        <\/p>\r\n                    <\/div>\r\n                <\/article>\r\n\r\n                <article class=\"lym-status-card\">\r\n                    <div class=\"lym-status-card-head\">\r\n                        <span class=\"lym-status-dot lym-status-dot-red\"><\/span>\r\n                        <h3>End-of-life indication<\/h3>\r\n                    <\/div>\r\n\r\n                    <div class=\"lym-status-block\">\r\n                        <span class=\"lym-detail-label\">Possible meaning<\/span>\r\n\r\n                        <p>\r\n                            The monitored component or internal disconnector has\r\n                            entered the manufacturer's fault state.\r\n                        <\/p>\r\n                    <\/div>\r\n\r\n                    <div class=\"lym-status-block\">\r\n                        <span class=\"lym-detail-label\">Maintenance response<\/span>\r\n\r\n                        <p>\r\n                            Replace the correct cartridge or complete SPD and\r\n                            investigate why it operated.\r\n                        <\/p>\r\n                    <\/div>\r\n                <\/article>\r\n\r\n                <article class=\"lym-status-card\">\r\n                    <div class=\"lym-status-card-head\">\r\n                        <span class=\"lym-status-dot lym-status-dot-amber\"><\/span>\r\n                        <h3>Dark or unclear indicator<\/h3>\r\n                    <\/div>\r\n\r\n                    <div class=\"lym-status-block\">\r\n                        <span class=\"lym-detail-label\">Possible meaning<\/span>\r\n\r\n                        <p>\r\n                            It may indicate loss of auxiliary power, indicator\r\n                            failure or another product-specific state.\r\n                        <\/p>\r\n                    <\/div>\r\n\r\n                    <div class=\"lym-status-block\">\r\n                        <span class=\"lym-detail-label\">Maintenance response<\/span>\r\n\r\n                        <p>\r\n                            Check the exact datasheet and supply condition before\r\n                            making a replacement decision.\r\n                        <\/p>\r\n                    <\/div>\r\n                <\/article>\r\n\r\n                <article class=\"lym-status-card\">\r\n                    <div class=\"lym-status-card-head\">\r\n                        <span class=\"lym-status-dot lym-status-dot-amber\"><\/span>\r\n                        <h3>Mixed pole states<\/h3>\r\n                    <\/div>\r\n\r\n                    <div class=\"lym-status-block\">\r\n                        <span class=\"lym-detail-label\">Possible meaning<\/span>\r\n\r\n                        <p>\r\n                            One protection mode may be offline while other poles\r\n                            still appear normal.\r\n                        <\/p>\r\n                    <\/div>\r\n\r\n                    <div class=\"lym-status-block\">\r\n                        <span class=\"lym-detail-label\">Maintenance response<\/span>\r\n\r\n                        <p>\r\n                            Treat the system as incompletely protected and replace\r\n                            the affected cartridge.\r\n                        <\/p>\r\n                    <\/div>\r\n                <\/article>\r\n\r\n            <\/div>\r\n\r\n            <h3>Remote signal verification<\/h3>\r\n\r\n            <ol>\r\n                <li>\r\n                    Confirm terminal designations and contact ratings from the\r\n                    datasheet.\r\n                <\/li>\r\n                <li>Confirm the expected NO and NC states.<\/li>\r\n                <li>Compare the local indicator with PLC, BMS or SCADA status.<\/li>\r\n                <li>Use the approved simulated-state method where provided.<\/li>\r\n                <li>Confirm the alarm identifies the correct panel.<\/li>\r\n                <li>Confirm the maintenance team receives the alarm.<\/li>\r\n                <li>Record the test and restore the normal condition.<\/li>\r\n            <\/ol>\r\n\r\n            <div class=\"lym-callout lym-callout-amber\">\r\n                <strong>Remote monitoring does not replace inspection<\/strong>\r\n\r\n                <p>\r\n                    A dry contact cannot confirm terminal condition, PE continuity,\r\n                    moisture, backup fuse rating, conductor routing or enclosure\r\n                    damage.\r\n                <\/p>\r\n            <\/div>\r\n\r\n            <div class=\"lym-specialist-links lym-screen-only\">\r\n                <strong>Need the detailed wiring procedure?<\/strong>\r\n\r\n                <p>\r\n                    For NO, NC and COM wiring to PLC, BMS or SCADA, see the\r\n                    <a href=\"\/spd-remote-alarm-plc\/\">\r\n                        SPD remote alarm contact guide\r\n                    <\/a>.\r\n                <\/p>\r\n            <\/div>\r\n        <\/section>\r\n\r\n        <section id=\"replace-or-investigate\">\r\n            <h2><span class=\"ez-toc-section\" id=\"replace-the-spd-or-investigate-the-root-cause\"><\/span>Replace the SPD or Investigate the Root Cause?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n            <p>\r\n                A failed cartridge must be replaced, but replacement alone may not\r\n                prevent another early failure.\r\n            <\/p>\r\n\r\n            <figure class=\"lym-figure\">\r\n                <div class=\"lym-figure-frame\">\r\n                    <img loading=\"lazy\"\r\n                        src=\"https:\/\/www.cnspd.com\/wp-content\/uploads\/2026\/07\/spd-maintenance-replacement-decision-flow.webp\"\r\n                        alt=\"SPD maintenance decision flow for inspection, replacement and root-cause investigation\"\r\n                        width=\"1448\"\r\n                        height=\"1086\"\r\n                        loading=\"lazy\"\r\n                        decoding=\"async\">\r\n                <\/div>\r\n\r\n                <figcaption>\r\n                    Replace failed protection promptly, but investigate system\r\n                    voltage, SPD selection, wiring, PE, backup protection and\r\n                    environmental conditions when failures are repeated or abnormal.\r\n                <\/figcaption>\r\n            <\/figure>\r\n\r\n            <div class=\"lym-decision\">\r\n                <div class=\"lym-decision-panel lym-decision-replace\">\r\n                    <h3>Replace promptly<\/h3>\r\n\r\n                    <ul>\r\n                        <li>The end-of-life indication is active.<\/li>\r\n                        <li>The housing or cartridge is cracked or burnt.<\/li>\r\n                        <li>There is evidence of arcing or carbonisation.<\/li>\r\n                        <li>The SPD cannot return to its normal state.<\/li>\r\n                        <li>The manufacturer requires replacement.<\/li>\r\n                    <\/ul>\r\n                <\/div>\r\n\r\n                <div class=\"lym-decision-divider\">and<\/div>\r\n\r\n                <div class=\"lym-decision-panel lym-decision-investigate\">\r\n                    <h3>Investigate before closing the job<\/h3>\r\n\r\n                    <ul>\r\n                        <li>Failures repeat unusually quickly.<\/li>\r\n                        <li>Operating voltage may exceed Uc or Ucpv.<\/li>\r\n                        <li>Backup protection repeatedly operates.<\/li>\r\n                        <li>Temperature or moisture is abnormal.<\/li>\r\n                        <li>The earthing arrangement has changed.<\/li>\r\n                        <li>The SPD Type may not match the exposure.<\/li>\r\n                    <\/ul>\r\n                <\/div>\r\n            <\/div>\r\n\r\n            <h3>Root-cause review for repeated failure<\/h3>\r\n\r\n            <div class=\"lym-grid-2\">\r\n                <article class=\"lym-card\">\r\n                    <h3>Electrical checks<\/h3>\r\n\r\n                    <ul>\r\n                        <li>Failed protection mode.<\/li>\r\n                        <li>Actual system voltage.<\/li>\r\n                        <li>Uc or Ucpv selection.<\/li>\r\n                        <li>Earthing-system topology.<\/li>\r\n                        <li>Backup-device coordination.<\/li>\r\n                    <\/ul>\r\n                <\/article>\r\n\r\n                <article class=\"lym-card\">\r\n                    <h3>Installation and environmental checks<\/h3>\r\n\r\n                    <ul>\r\n                        <li>Connection length and routing.<\/li>\r\n                        <li>Terminal and conductor condition.<\/li>\r\n                        <li>Temperature and ventilation.<\/li>\r\n                        <li>Moisture and contamination.<\/li>\r\n                        <li>Lightning and switching history.<\/li>\r\n                    <\/ul>\r\n                <\/article>\r\n            <\/div>\r\n\r\n            <div class=\"lym-specialist-links lym-screen-only\">\r\n                <strong>Detailed fault and replacement guides<\/strong>\r\n\r\n                <ul>\r\n                    <li>\r\n                        <a href=\"\/how-to-check-spd-failure\/\">\r\n                            How to check whether an SPD has failed\r\n                        <\/a>\r\n                    <\/li>\r\n\r\n                    <li>\r\n                        <a href=\"\/spd-cartridge-replacement\/\">\r\n                            SPD cartridge replacement guide\r\n                        <\/a>\r\n                    <\/li>\r\n\r\n                    <li>\r\n                        <a href=\"\/spd-failure-causes\/\">\r\n                            Common causes of SPD failure\r\n                        <\/a>\r\n                    <\/li>\r\n\r\n                    <li>\r\n                        <a href=\"\/why-spd-burns-out\/\">\r\n                            Why an SPD burns, melts or smokes\r\n                        <\/a>\r\n                    <\/li>\r\n                <\/ul>\r\n            <\/div>\r\n        <\/section>\r\n\r\n        <section id=\"panel-builder-handover\">\r\n            <h2><span class=\"ez-toc-section\" id=\"spd-maintenance-handover-checklist-for-panel-builders\"><\/span>SPD Maintenance Handover Checklist for Panel Builders<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n            <p>\r\n                The future maintenance team needs enough information to identify a\r\n                failure and order the correct replacement years later.\r\n            <\/p>\r\n\r\n            <div class=\"lym-handover-grid\">\r\n\r\n                <article class=\"lym-handover-card\">\r\n                    <span class=\"lym-checkbox\">\u2713<\/span>\r\n\r\n                    <div>\r\n                        <h3>SPD schedule<\/h3>\r\n\r\n                        <p>\r\n                            Panel ID, circuit, model, Type, Uc\/Ucpv, discharge\r\n                            ratings, poles and installation date.\r\n                        <\/p>\r\n                    <\/div>\r\n                <\/article>\r\n\r\n                <article class=\"lym-handover-card\">\r\n                    <span class=\"lym-checkbox\">\u2713<\/span>\r\n\r\n                    <div>\r\n                        <h3>Single-line and wiring diagrams<\/h3>\r\n\r\n                        <p>\r\n                            SPD position, connection topology, backup protection,\r\n                            PE path and remote-contact terminals.\r\n                        <\/p>\r\n                    <\/div>\r\n                <\/article>\r\n\r\n                <article class=\"lym-handover-card\">\r\n                    <span class=\"lym-checkbox\">\u2713<\/span>\r\n\r\n                    <div>\r\n                        <h3>Manufacturer instructions<\/h3>\r\n\r\n                        <p>\r\n                            Installation, torque, indication, replacement, safety\r\n                            and approved testing instructions.\r\n                        <\/p>\r\n                    <\/div>\r\n                <\/article>\r\n\r\n                <article class=\"lym-handover-card\">\r\n                    <span class=\"lym-checkbox\">\u2713<\/span>\r\n\r\n                    <div>\r\n                        <h3>Replacement information<\/h3>\r\n\r\n                        <p>\r\n                            Complete SPD and cartridge part numbers and compatible\r\n                            plug-base information.\r\n                        <\/p>\r\n                    <\/div>\r\n                <\/article>\r\n\r\n                <article class=\"lym-handover-card\">\r\n                    <span class=\"lym-checkbox\">\u2713<\/span>\r\n\r\n                    <div>\r\n                        <h3>Remote alarm logic<\/h3>\r\n\r\n                        <p>\r\n                            NO\/NC\/COM state, contact rating, terminal number and\r\n                            PLC\/BMS point name.\r\n                        <\/p>\r\n                    <\/div>\r\n                <\/article>\r\n\r\n                <article class=\"lym-handover-card\">\r\n                    <span class=\"lym-checkbox\">\u2713<\/span>\r\n\r\n                    <div>\r\n                        <h3>Commissioning baseline<\/h3>\r\n\r\n                        <p>\r\n                            Initial indication, remote alarm test, photographs and\r\n                            commissioning date.\r\n                        <\/p>\r\n                    <\/div>\r\n                <\/article>\r\n\r\n                <article class=\"lym-handover-card\">\r\n                    <span class=\"lym-checkbox\">\u2713<\/span>\r\n\r\n                    <div>\r\n                        <h3>Maintenance schedule<\/h3>\r\n\r\n                        <p>\r\n                            Routine, planned, annual and event-triggered inspection\r\n                            recommendations.\r\n                        <\/p>\r\n                    <\/div>\r\n                <\/article>\r\n\r\n                <article class=\"lym-handover-card\">\r\n                    <span class=\"lym-checkbox\">\u2713<\/span>\r\n\r\n                    <div>\r\n                        <h3>Initial spare stock<\/h3>\r\n\r\n                        <p>\r\n                            Quantity and model of replacement cartridges or complete\r\n                            SPDs supplied with the project.\r\n                        <\/p>\r\n                    <\/div>\r\n                <\/article>\r\n\r\n            <\/div>\r\n        <\/section>\r\n\r\n        <section id=\"spare-stock\">\r\n            <h2><span class=\"ez-toc-section\" id=\"how-many-spare-spd-modules-should-a-site-keep\"><\/span>How Many Spare SPD Modules Should a Site Keep?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n            <p>\r\n                Spare-stock requirements depend on product commonality, site access,\r\n                lead time, lightning exposure, historical consumption and equipment\r\n                criticality.\r\n            <\/p>\r\n\r\n            <div class=\"lym-grid-3\">\r\n                <article class=\"lym-card\">\r\n                    <h3>Critical small site<\/h3>\r\n\r\n                    <p>\r\n                        Keep at least one verified replacement for each critical or\r\n                        unique SPD configuration.\r\n                    <\/p>\r\n                <\/article>\r\n\r\n                <article class=\"lym-card\">\r\n                    <h3>Large standardised site<\/h3>\r\n\r\n                    <p>\r\n                        Set minimum quantities from the installed base, historical\r\n                        replacement rate and supplier lead time.\r\n                    <\/p>\r\n                <\/article>\r\n\r\n                <article class=\"lym-card\">\r\n                    <h3>Remote or unmanned site<\/h3>\r\n\r\n                    <p>\r\n                        Store the correct replacement near the service location and\r\n                        identify it before technicians travel.\r\n                    <\/p>\r\n                <\/article>\r\n            <\/div>\r\n\r\n            <h3>Verify every spare against these fields<\/h3>\r\n\r\n            <div class=\"lym-grid-2\">\r\n                <article class=\"lym-card\">\r\n                    <ul>\r\n                        <li>Manufacturer and complete model.<\/li>\r\n                        <li>AC, PV DC or signal application.<\/li>\r\n                        <li>Uc or Ucpv rating.<\/li>\r\n                        <li>SPD Type and discharge ratings.<\/li>\r\n                    <\/ul>\r\n                <\/article>\r\n\r\n                <article class=\"lym-card\">\r\n                    <ul>\r\n                        <li>Number of poles and protection modes.<\/li>\r\n                        <li>Cartridge and base compatibility.<\/li>\r\n                        <li>Remote-contact version.<\/li>\r\n                        <li>Packaging and storage condition.<\/li>\r\n                    <\/ul>\r\n                <\/article>\r\n            <\/div>\r\n        <\/section>\r\n\r\n        <section id=\"maintenance-record\">\r\n            <h2><span class=\"ez-toc-section\" id=\"spd-maintenance-record-template\"><\/span>SPD Maintenance Record Template<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n            <p>\r\n                \u201cChecked\u2014OK\u201d is not a sufficient record. The maintenance log should\r\n                identify the inspected asset, actual result, corrective action and\r\n                next inspection date.\r\n            <\/p>\r\n\r\n            <div class=\"lym-record\">\r\n                <div class=\"lym-record-grid\">\r\n\r\n                    <div class=\"lym-record-field\">\r\n                        <span class=\"lym-record-label\">Site \/ Building<\/span>\r\n                        <span class=\"lym-record-line\"><\/span>\r\n                    <\/div>\r\n\r\n                    <div class=\"lym-record-field\">\r\n                        <span class=\"lym-record-label\">Panel ID<\/span>\r\n                        <span class=\"lym-record-line\"><\/span>\r\n                    <\/div>\r\n\r\n                    <div class=\"lym-record-field\">\r\n                        <span class=\"lym-record-label\">Inspection Date<\/span>\r\n                        <span class=\"lym-record-line\"><\/span>\r\n                    <\/div>\r\n\r\n                    <div class=\"lym-record-field\">\r\n                        <span class=\"lym-record-label\">Inspection Trigger<\/span>\r\n                        <span class=\"lym-record-line\"><\/span>\r\n                    <\/div>\r\n\r\n                    <div class=\"lym-record-field\">\r\n                        <span class=\"lym-record-label\">SPD Manufacturer<\/span>\r\n                        <span class=\"lym-record-line\"><\/span>\r\n                    <\/div>\r\n\r\n                    <div class=\"lym-record-field\">\r\n                        <span class=\"lym-record-label\">SPD Model<\/span>\r\n                        <span class=\"lym-record-line\"><\/span>\r\n                    <\/div>\r\n\r\n                    <div class=\"lym-record-field\">\r\n                        <span class=\"lym-record-label\">SPD Type<\/span>\r\n                        <span class=\"lym-record-line\"><\/span>\r\n                    <\/div>\r\n\r\n                    <div class=\"lym-record-field\">\r\n                        <span class=\"lym-record-label\">Uc \/ Ucpv<\/span>\r\n                        <span class=\"lym-record-line\"><\/span>\r\n                    <\/div>\r\n\r\n                    <div class=\"lym-record-field\">\r\n                        <span class=\"lym-record-label\">In \/ Imax \/ Iimp<\/span>\r\n                        <span class=\"lym-record-line\"><\/span>\r\n                    <\/div>\r\n\r\n                    <div class=\"lym-record-field\">\r\n                        <span class=\"lym-record-label\">\r\n                            Poles \/ Protection Modes\r\n                        <\/span>\r\n                        <span class=\"lym-record-line\"><\/span>\r\n                    <\/div>\r\n\r\n                    <div class=\"lym-record-field\">\r\n                        <span class=\"lym-record-label\">Indicator Status<\/span>\r\n                        <span class=\"lym-record-line\"><\/span>\r\n                    <\/div>\r\n\r\n                    <div class=\"lym-record-field\">\r\n                        <span class=\"lym-record-label\">Remote Signal Result<\/span>\r\n                        <span class=\"lym-record-line\"><\/span>\r\n                    <\/div>\r\n\r\n                    <div class=\"lym-record-field\">\r\n                        <span class=\"lym-record-label\">Backup Protection<\/span>\r\n                        <span class=\"lym-record-line\"><\/span>\r\n                    <\/div>\r\n\r\n                    <div class=\"lym-record-field\">\r\n                        <span class=\"lym-record-label\">PE \/ Bonding Condition<\/span>\r\n                        <span class=\"lym-record-line\"><\/span>\r\n                    <\/div>\r\n\r\n                    <div class=\"lym-record-field lym-record-field-wide\">\r\n                        <span class=\"lym-record-label\">Corrective Action<\/span>\r\n                        <span class=\"lym-record-line\"><\/span>\r\n                    <\/div>\r\n\r\n                    <div class=\"lym-record-field\">\r\n                        <span class=\"lym-record-label\">Replacement Part<\/span>\r\n                        <span class=\"lym-record-line\"><\/span>\r\n                    <\/div>\r\n\r\n                    <div class=\"lym-record-field\">\r\n                        <span class=\"lym-record-label\">Suspected Root Cause<\/span>\r\n                        <span class=\"lym-record-line\"><\/span>\r\n                    <\/div>\r\n\r\n                    <div class=\"lym-record-field\">\r\n                        <span class=\"lym-record-label\">Technician<\/span>\r\n                        <span class=\"lym-record-line\"><\/span>\r\n                    <\/div>\r\n\r\n                    <div class=\"lym-record-field\">\r\n                        <span class=\"lym-record-label\">Reviewer<\/span>\r\n                        <span class=\"lym-record-line\"><\/span>\r\n                    <\/div>\r\n\r\n                    <div class=\"lym-record-field\">\r\n                        <span class=\"lym-record-label\">Action Due Date<\/span>\r\n                        <span class=\"lym-record-line\"><\/span>\r\n                    <\/div>\r\n\r\n                    <div class=\"lym-record-field\">\r\n                        <span class=\"lym-record-label\">Next Inspection Date<\/span>\r\n                        <span class=\"lym-record-line\"><\/span>\r\n                    <\/div>\r\n\r\n                <\/div>\r\n            <\/div>\r\n        <\/section>\r\n\r\n        <section id=\"application-notes\">\r\n            <h2><span class=\"ez-toc-section\" id=\"application-specific-spd-maintenance-notes\"><\/span>Application-Specific SPD Maintenance Notes<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n            <div class=\"lym-grid-3\">\r\n                <article class=\"lym-card\">\r\n                    <h3>Solar PV systems<\/h3>\r\n\r\n                    <ul>\r\n                        <li>Check DC polarity and Ucpv.<\/li>\r\n                        <li>Inspect combiner boxes and inverter inputs.<\/li>\r\n                        <li>Check for condensation and failed seals.<\/li>\r\n                        <li>Use PV DC-rated replacement cartridges.<\/li>\r\n                    <\/ul>\r\n                <\/article>\r\n\r\n                <article class=\"lym-card\">\r\n                    <h3>Telecom and remote sites<\/h3>\r\n\r\n                    <ul>\r\n                        <li>Prioritise remote alarm verification.<\/li>\r\n                        <li>Check DC power, data and earthing paths.<\/li>\r\n                        <li>Keep exact spares near the site.<\/li>\r\n                        <li>Review alarms after storms.<\/li>\r\n                    <\/ul>\r\n                <\/article>\r\n\r\n                <article class=\"lym-card\">\r\n                    <h3>Industrial control panels<\/h3>\r\n\r\n                    <ul>\r\n                        <li>Check power and signal SPDs together.<\/li>\r\n                        <li>Review PLC and VFD fault logs.<\/li>\r\n                        <li>Confirm interface compatibility.<\/li>\r\n                        <li>Verify remote-contact mapping.<\/li>\r\n                    <\/ul>\r\n                <\/article>\r\n\r\n                <article class=\"lym-card\">\r\n                    <h3>Data centres<\/h3>\r\n\r\n                    <ul>\r\n                        <li>Use alarm integration.<\/li>\r\n                        <li>Coordinate with UPS maintenance.<\/li>\r\n                        <li>Track replacements by panel.<\/li>\r\n                        <li>Keep rapid-access spares.<\/li>\r\n                    <\/ul>\r\n                <\/article>\r\n\r\n                <article class=\"lym-card\">\r\n                    <h3>Outdoor distribution boards<\/h3>\r\n\r\n                    <ul>\r\n                        <li>Inspect seals, glands and drainage.<\/li>\r\n                        <li>Check corrosion and condensation.<\/li>\r\n                        <li>Confirm suitable enclosure protection.<\/li>\r\n                        <li>Inspect after severe weather.<\/li>\r\n                    <\/ul>\r\n                <\/article>\r\n\r\n                <article class=\"lym-card\">\r\n                    <h3>Panel builder after-sales teams<\/h3>\r\n\r\n                    <ul>\r\n                        <li>Keep the original BOM and drawings.<\/li>\r\n                        <li>Provide exact replacement codes.<\/li>\r\n                        <li>Record customer-side modifications.<\/li>\r\n                        <li>Use failure records to improve designs.<\/li>\r\n                    <\/ul>\r\n                <\/article>\r\n            <\/div>\r\n        <\/section>\r\n\r\n    <\/div>\r\n\r\n    <section id=\"faq\">\r\n        <h2><span class=\"ez-toc-section\" id=\"frequently-asked-questions\"><\/span>Frequently Asked Questions<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n        <div class=\"lym-faq\">\r\n            <details>\r\n                <summary>\r\n                    How often should surge protective devices be inspected?\r\n                <\/summary>\r\n\r\n                <div class=\"lym-faq-answer\">\r\n                    <p>\r\n                        There is no universal interval for every SPD. Use routine\r\n                        visual checks, planned panel inspections, an annual review\r\n                        and immediate post-event inspections.\r\n                    <\/p>\r\n                <\/div>\r\n            <\/details>\r\n\r\n            <details>\r\n                <summary>\r\n                    Is a monthly SPD inspection mandatory?\r\n                <\/summary>\r\n\r\n                <div class=\"lym-faq-answer\">\r\n                    <p>\r\n                        Not universally. Monthly visual checks are a practical policy\r\n                        for high-risk sites, but they are not a worldwide legal\r\n                        requirement.\r\n                    <\/p>\r\n                <\/div>\r\n            <\/details>\r\n\r\n            <details>\r\n                <summary>\r\n                    Does a green SPD indicator guarantee full protection?\r\n                <\/summary>\r\n\r\n                <div class=\"lym-faq-answer\">\r\n                    <p>\r\n                        No. It does not prove correct Uc selection, wiring, backup\r\n                        protection or full remaining surge capacity.\r\n                    <\/p>\r\n                <\/div>\r\n            <\/details>\r\n\r\n            <details>\r\n                <summary>\r\n                    Should an SPD be replaced after every lightning storm?\r\n                <\/summary>\r\n\r\n                <div class=\"lym-faq-answer\">\r\n                    <p>\r\n                        Not automatically. Inspect it after the event and follow the\r\n                        manufacturer's replacement criteria.\r\n                    <\/p>\r\n                <\/div>\r\n            <\/details>\r\n\r\n            <details>\r\n                <summary>\r\n                    Can a multimeter confirm that an SPD is healthy?\r\n                <\/summary>\r\n\r\n                <div class=\"lym-faq-answer\">\r\n                    <p>\r\n                        A normal multimeter reading cannot confirm the original\r\n                        voltage protection level or remaining discharge capacity.\r\n                    <\/p>\r\n                <\/div>\r\n            <\/details>\r\n\r\n            <details>\r\n                <summary>\r\n                    Should SPD terminals be tightened during every inspection?\r\n                <\/summary>\r\n\r\n                <div class=\"lym-faq-answer\">\r\n                    <p>\r\n                        Not blindly. Torque verification must follow the specific\r\n                        manufacturer's value and the site's maintenance procedure.\r\n                    <\/p>\r\n                <\/div>\r\n            <\/details>\r\n\r\n            <details>\r\n                <summary>\r\n                    What should be recorded after replacing a cartridge?\r\n                <\/summary>\r\n\r\n                <div class=\"lym-faq-answer\">\r\n                    <p>\r\n                        Record the panel, failed mode, old and new model, ratings,\r\n                        event trigger, date, technician, suspected cause and updated\r\n                        spare quantity.\r\n                    <\/p>\r\n                <\/div>\r\n            <\/details>\r\n\r\n            <details>\r\n                <summary>\r\n                    Can a different brand of cartridge fit an existing base?\r\n                <\/summary>\r\n\r\n                <div class=\"lym-faq-answer\">\r\n                    <p>\r\n                        Do not assume compatibility. Verify the manufacturer, series,\r\n                        ratings, mechanical keying and remote-contact arrangement.\r\n                    <\/p>\r\n                <\/div>\r\n            <\/details>\r\n        <\/div>\r\n    <\/section>\r\n\r\n    <section class=\"lym-related lym-screen-only\">\r\n        <h2><span class=\"ez-toc-section\" id=\"related-spd-maintenance-guides\"><\/span>Related SPD Maintenance Guides<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n        <div class=\"lym-related-grid\">\r\n            <a href=\"\/how-to-check-spd-failure\/\">\r\n                How to Check SPD Failure\r\n            <\/a>\r\n\r\n            <a href=\"\/spd-cartridge-replacement\/\">\r\n                SPD Cartridge Replacement Guide\r\n            <\/a>\r\n\r\n            <a href=\"\/spd-failure-causes\/\">\r\n                Common Causes of SPD Failure\r\n            <\/a>\r\n\r\n            <a href=\"\/why-spd-burns-out\/\">\r\n                Why an SPD Burns, Melts or Smokes\r\n            <\/a>\r\n\r\n            <a href=\"\/spd-remote-alarm-plc\/\">\r\n                SPD Remote Alarm Contact Guide\r\n            <\/a>\r\n\r\n            <a href=\"\/spd-grounding-resistance\/\">\r\n                SPD Grounding and Bonding\r\n            <\/a>\r\n\r\n            <a href=\"\/spd-cable-length-0-5m\/\">\r\n                SPD Connection Length Guide\r\n            <\/a>\r\n\r\n            <a href=\"\/replace-spd-after-lightning\/\">\r\n                SPD Inspection After Lightning\r\n            <\/a>\r\n        <\/div>\r\n    <\/section>\r\n\r\n    <section id=\"authoritative-sources\">\r\n        <h2><span class=\"ez-toc-section\" id=\"authoritative-technical-sources\"><\/span>Authoritative Technical Sources<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n        <p>\r\n            Inspection intervals and test methods must be confirmed against local\r\n            requirements, project specifications and the instructions supplied with\r\n            the installed SPD.\r\n        <\/p>\r\n\r\n        <ol class=\"lym-source-list\">\r\n            <li>\r\n                <a\r\n                    href=\"https:\/\/webstore.iec.ch\/en\/publication\/29590\"\r\n                    target=\"_blank\"\r\n                    rel=\"noopener noreferrer\">\r\n                    IEC 62305-4:2024\r\n                <\/a>\r\n                \u2014 Surge protection measures for electrical and electronic systems.\r\n            <\/li>\r\n\r\n            <li>\r\n                <a\r\n                    href=\"https:\/\/webstore.iec.ch\/en\/publication\/33680\"\r\n                    target=\"_blank\"\r\n                    rel=\"noopener noreferrer\">\r\n                    IEC 62305-3:2024\r\n                <\/a>\r\n                \u2014 Inspection and maintenance of lightning protection systems.\r\n            <\/li>\r\n\r\n            <li>\r\n                <a\r\n                    href=\"https:\/\/webstore.iec.ch\/en\/publication\/65314\"\r\n                    target=\"_blank\"\r\n                    rel=\"noopener noreferrer\">\r\n                    IEC 61643-11:2025\r\n                <\/a>\r\n                \u2014 AC power SPD requirements and test methods.\r\n            <\/li>\r\n\r\n            <li>\r\n                <a\r\n                    href=\"https:\/\/webstore.iec.ch\/en\/publication\/26931\"\r\n                    target=\"_blank\"\r\n                    rel=\"noopener noreferrer\">\r\n                    IEC 61643-31\r\n                <\/a>\r\n                \u2014 PV DC SPD requirements and test methods.\r\n            <\/li>\r\n\r\n            <li>\r\n                <a\r\n                    href=\"https:\/\/webstore.iec.ch\/en\/publication\/69085\"\r\n                    target=\"_blank\"\r\n                    rel=\"noopener noreferrer\">\r\n                    IEC 61643-21:2025\r\n                <\/a>\r\n                \u2014 Telecommunications and signalling network SPDs.\r\n            <\/li>\r\n\r\n            <li>\r\n                <a\r\n                    href=\"https:\/\/www.dehn-international.com\/en\/faq-power-supply-systems-redliner\"\r\n                    target=\"_blank\"\r\n                    rel=\"noopener noreferrer\">\r\n                    DEHN power-supply SPD inspection guidance\r\n                <\/a>\r\n            <\/li>\r\n\r\n            <li>\r\n                <a\r\n                    href=\"https:\/\/www.phoenixcontact.com\/assets\/c8428ddc-254d-40b8-a2f2-540ac13bd818\/epaper\/5131327_TT_Basics_EN.pdf\"\r\n                    target=\"_blank\"\r\n                    rel=\"noopener noreferrer\">\r\n                    Phoenix Contact lightning and surge protection basics\r\n                <\/a>\r\n            <\/li>\r\n        <\/ol>\r\n    <\/section>\r\n\r\n    <section class=\"lym-cta lym-screen-only\">\r\n        <h2><span class=\"ez-toc-section\" id=\"need-an-spd-configuration-designed-for-easier-maintenance\"><\/span>Need an SPD Configuration Designed for Easier Maintenance?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n        <p>\r\n            LEEYEE supports panel builders, OEM buyers and project teams with\r\n            pluggable AC and PV DC SPDs, visual indication, optional remote\r\n            signalling, replacement planning and technical documentation.\r\n        <\/p>\r\n\r\n        <div class=\"lym-actions\">\r\n            <a\r\n                href=\"javascript:void(0);\"\r\n                class=\"lym-btn lym-btn-primary leeyee-site-popup-btn\">\r\n                <span>Discuss Your SPD Requirement<\/span>\r\n            <\/a>\r\n        <\/div>\r\n    <\/section>\r\n\r\n<\/div>\r\n\r\n<script>\r\n(function () {\r\n    \"use strict\";\r\n\r\n    var printButton = document.getElementById(\"lym-print-btn\");\r\n    var csvButton = document.getElementById(\"lym-csv-btn\");\r\n\r\n    if (printButton) 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