{"id":10099,"date":"2026-08-21T18:12:19","date_gmt":"2026-08-21T22:12:19","guid":{"rendered":"https:\/\/cetechsupport.com\/?p=10099"},"modified":"2026-08-21T18:12:19","modified_gmt":"2026-08-21T22:12:19","slug":"code-88-38-vfd-internal-fault-dc-discharge-code-88-78-vfd-lockout-int-dc-discharge","status":"publish","type":"post","link":"https:\/\/cetechsupport.com\/fr\/code-88-38-vfd-internal-fault-dc-discharge-code-88-78-vfd-lockout-int-dc-discharge\/","title":{"rendered":"Code 88-38 VFD Internal Fault &#8211; DC Discharge Code 88-78 VFD Lockout &#8211; Int DC Discharge"},"content":{"rendered":"<div class=\"wp-block-group fault-code-summary is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group__inner-container\">\n\n<h2 class=\"wp-block-heading\">Codes de d\u00e9faut couverts<\/h2>\n\n\n<p class=\"wp-block-paragraph\"><strong>88-38, 88-78<\/strong><\/p>\n\n<\/div><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">The unit VFD boosts the 230 VAC line voltage, converts the boosted AC voltage to DC voltage, and then rapidly switches the DC voltage on and off to create a three-phase waveform that operates the compressor at varying speeds. This fault becomes active when the DC voltage is shorted to ground and the VFD will open the power relay. While this fault or malfunction is active the unit is inoperable. The VFD will attempt to reset itself automatically but if problem persists, the fault will escalate to 88-78 malfunction and lock out system for 4 hours. Manually power cycle outdoor unit with disconnect, if malfunction persists replace VFD.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n<p class=\"has-small-font-size wp-block-paragraph\"><em>Pages de d\u00e9pannage ACHPVSR454-02SM.<\/em><\/p>","protected":false},"excerpt":{"rendered":"<p>Troubleshooting guidance for fault code(s) 88-38, 88-78.<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center 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88-78.","_links":{"self":[{"href":"https:\/\/cetechsupport.com\/fr\/wp-json\/wp\/v2\/posts\/10099","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cetechsupport.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cetechsupport.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cetechsupport.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cetechsupport.com\/fr\/wp-json\/wp\/v2\/comments?post=10099"}],"version-history":[{"count":1,"href":"https:\/\/cetechsupport.com\/fr\/wp-json\/wp\/v2\/posts\/10099\/revisions"}],"predecessor-version":[{"id":930357,"href":"https:\/\/cetechsupport.com\/fr\/wp-json\/wp\/v2\/posts\/10099\/revisions\/930357"}],"wp:attachment":[{"href":"https:\/\/cetechsupport.com\/fr\/wp-json\/wp\/v2\/media?parent=10099"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cetechsupport.com\/fr\/wp-json\/wp\/v2\/categories?post=10099"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cetechsupport.com\/fr\/wp-json\/wp\/v2\/tags?post=10099"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}