{"id":930855,"date":"2026-08-25T16:42:18","date_gmt":"2026-08-25T20:42:18","guid":{"rendered":"https:\/\/cetechsupport.com\/?p=930855"},"modified":"2026-09-22T13:19:51","modified_gmt":"2026-09-22T17:19:51","slug":"37mgra-eh-03-ec-07-ec-71","status":"publish","type":"post","link":"https:\/\/cetechsupport.com\/fr\/37mgra-eh-03-ec-07-ec-71\/","title":{"rendered":"37MGRA EH03 \/ EC07 \/ EC71 Fan Speed Is Operating Outside of Normal Range Diagnosis and Solution"},"content":{"rendered":"<div class=\"diagnostic-code-summary\">\n<h2>Codes de diagnostic couverts<\/h2>\n<p><strong>EH 03(EH03), EC 07(EC07), EC 71(EC71)<\/strong><\/p>\n<ul>\n<li>EH 03 &#8211; IDU Fan Speed Out of Control<\/li>\n<li>EC 07 &#8211; ODU Fan Speed Out of Control<\/li>\n<\/ul>\n<p>Description: When indoor \/ outdoor fan speed keeps too low or too high for a certain time, the LED displays the failure code and the AC turns off. Recommended parts to prepare: Connection wires, Fan assembly, Fan motor, PCB Troubleshooting and repair: &#8212;N Indoor or Outdoor DC Fan Motor (control chip is in fan motor) With the power on and when the unit is in standby, measure the voltage of pin1- pin3, pin4- pin3 in the fan motor connector. If the value of the voltage is not in the range shown in below table, the PCB needs to be replaced. Outdoor DC Fan Motor (control chip is in outdoor PCB) Release the UVW connector. Measure the resistance of U-V, U-W, V-W. If the resistances are not equal to each other, the fan motor needs to be replaced. Otherwise, the PCB needs to be replaced.<\/p>\n<\/div>\n<h2>Flux de travail de d\u00e9pannage<\/h2>\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/cetechsupport.com\/wp-content\/uploads\/2026\/08\/37mgra-v5-37mgra-eh-03-ec-07-ec-71-1.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1946\" height=\"2485\" class=\"wp-image-930984\" src=\"https:\/\/cetechsupport.com\/wp-content\/uploads\/2026\/08\/37mgra-v5-37mgra-eh-03-ec-07-ec-71-1.png\" alt=\"EH03 \/ EC 07 \/ EC 71 Fan Speed Is Operating Outside of Normal Range Diagnosis and Solution workflow\" srcset=\"https:\/\/cetechsupport.com\/wp-content\/uploads\/2026\/08\/37mgra-v5-37mgra-eh-03-ec-07-ec-71-1.png 1946w, https:\/\/cetechsupport.com\/wp-content\/uploads\/2026\/08\/37mgra-v5-37mgra-eh-03-ec-07-ec-71-1-235x300.png 235w, https:\/\/cetechsupport.com\/wp-content\/uploads\/2026\/08\/37mgra-v5-37mgra-eh-03-ec-07-ec-71-1-802x1024.png 802w, https:\/\/cetechsupport.com\/wp-content\/uploads\/2026\/08\/37mgra-v5-37mgra-eh-03-ec-07-ec-71-1-768x981.png 768w, https:\/\/cetechsupport.com\/wp-content\/uploads\/2026\/08\/37mgra-v5-37mgra-eh-03-ec-07-ec-71-1-1203x1536.png 1203w, https:\/\/cetechsupport.com\/wp-content\/uploads\/2026\/08\/37mgra-v5-37mgra-eh-03-ec-07-ec-71-1-1604x2048.png 1604w, https:\/\/cetechsupport.com\/wp-content\/uploads\/2026\/08\/37mgra-v5-37mgra-eh-03-ec-07-ec-71-1-9x12.png 9w\" sizes=\"auto, (max-width: 1946px) 100vw, 1946px\" \/><\/a><figcaption>EH03 \/ EC 07 \/ EC 71 Fan Speed Is Operating Outside of Normal Range Diagnosis and Solution workflow<\/figcaption><\/figure>\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/cetechsupport.com\/wp-content\/uploads\/2026\/08\/37mgra-v5-37mgra-eh-03-ec-07-ec-71-2.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1946\" height=\"2485\" class=\"wp-image-930985\" src=\"https:\/\/cetechsupport.com\/wp-content\/uploads\/2026\/08\/37mgra-v5-37mgra-eh-03-ec-07-ec-71-2.png\" alt=\"EH03 \/ EC 07 \/ EC 71 Fan Speed Is Operating Outside of Normal Range Diagnosis and Solution workflow\" srcset=\"https:\/\/cetechsupport.com\/wp-content\/uploads\/2026\/08\/37mgra-v5-37mgra-eh-03-ec-07-ec-71-2.png 1946w, https:\/\/cetechsupport.com\/wp-content\/uploads\/2026\/08\/37mgra-v5-37mgra-eh-03-ec-07-ec-71-2-235x300.png 235w, https:\/\/cetechsupport.com\/wp-content\/uploads\/2026\/08\/37mgra-v5-37mgra-eh-03-ec-07-ec-71-2-802x1024.png 802w, https:\/\/cetechsupport.com\/wp-content\/uploads\/2026\/08\/37mgra-v5-37mgra-eh-03-ec-07-ec-71-2-768x981.png 768w, https:\/\/cetechsupport.com\/wp-content\/uploads\/2026\/08\/37mgra-v5-37mgra-eh-03-ec-07-ec-71-2-1203x1536.png 1203w, https:\/\/cetechsupport.com\/wp-content\/uploads\/2026\/08\/37mgra-v5-37mgra-eh-03-ec-07-ec-71-2-1604x2048.png 1604w, https:\/\/cetechsupport.com\/wp-content\/uploads\/2026\/08\/37mgra-v5-37mgra-eh-03-ec-07-ec-71-2-9x12.png 9w\" sizes=\"auto, (max-width: 1946px) 100vw, 1946px\" \/><\/a><figcaption>EH03 \/ EC07 \/ EC71 Fan Speed Is Operating Outside of Normal Range Diagnosis and Solution workflow<\/figcaption><\/figure>\n<p><small><em>Source du flux de travail : manuel de service d'origine 37MGRA-02SM PDF. Noms des codes d'erreur recoup\u00e9s avec 37MGRA-04SI.<\/em><\/small><\/p>","protected":false},"excerpt":{"rendered":"<p>Troubleshooting workflow for EH 03, EC 07, EC 71.<\/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":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[241],"tags":[243,250,251,249],"class_list":["post-930855","post","type-post","status-publish","format-standard","hentry","category-37mgra-diagnostic-codes","tag-37mgra","tag-ec-07","tag-ec-71","tag-eh-03"],"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false,"trp-custom-language-flag":false},"uagb_author_info":{"display_name":"Carrier Enterprise","author_link":"https:\/\/cetechsupport.com\/fr\/author\/joshg\/"},"uagb_comment_info":0,"uagb_excerpt":"Troubleshooting workflow for EH 03, EC 07, EC 71.","_links":{"self":[{"href":"https:\/\/cetechsupport.com\/fr\/wp-json\/wp\/v2\/posts\/930855","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=930855"}],"version-history":[{"count":6,"href":"https:\/\/cetechsupport.com\/fr\/wp-json\/wp\/v2\/posts\/930855\/revisions"}],"predecessor-version":[{"id":931883,"href":"https:\/\/cetechsupport.com\/fr\/wp-json\/wp\/v2\/posts\/930855\/revisions\/931883"}],"wp:attachment":[{"href":"https:\/\/cetechsupport.com\/fr\/wp-json\/wp\/v2\/media?parent=930855"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cetechsupport.com\/fr\/wp-json\/wp\/v2\/categories?post=930855"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cetechsupport.com\/fr\/wp-json\/wp\/v2\/tags?post=930855"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}