{"id":930867,"date":"2026-08-25T16:42:17","date_gmt":"2026-08-25T20:42:17","guid":{"rendered":"https:\/\/cetechsupport.com\/?p=930867"},"modified":"2026-09-22T13:44:56","modified_gmt":"2026-09-22T17:44:56","slug":"37mgra-pc-03-pc-30-pc-31","status":"publish","type":"post","link":"https:\/\/cetechsupport.com\/es\/37mgra-pc-03-pc-30-pc-31\/","title":{"rendered":"37MGRA PC 03 Pressure Protection (low or high pressure), PC 30 High Pressure Protection, PC 31 Low Pressure Protection (Diagnosis and Solution)"},"content":{"rendered":"<div class=\"diagnostic-code-summary\">\n<h2>C\u00f3digos de diagn\u00f3stico cubiertos<\/h2>\n<p><strong>PC 03(PC03), PC 30(PC30), PC 31(PC31)<\/strong><\/p>\n<ul>\n<li>PC 03 &#8211; Low- or High-Pressure Protection<\/li>\n<\/ul>\n<p>Description: Outdoor pressure switch cut off the system because high pressure is higher than 638 psi or outdoor pressure switch cut off the system because low pressure is lower than 19 psi, the LED displays the failure code. Recommended parts to prepare: Connection wires, Pressure switch, Outdoor fan, Outdoor main PCB, Refrigerant Troubleshooting and repair: <\/p>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Flujo de soluci\u00f3n de problemas<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/cetechsupport.com\/wp-content\/uploads\/2026\/08\/37mgra-v5-37mgra-pc-03-pc-30-pc-31-1.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1946\" height=\"2485\" src=\"https:\/\/cetechsupport.com\/wp-content\/uploads\/2026\/08\/37mgra-v5-37mgra-pc-03-pc-30-pc-31-1.png\" alt=\"PC 03 Pressure Protection (low or high pressure), PC 30 High Pressure Protection, PC 31 Low Pressure Protection (Diagnosis and Solution) workflow\" class=\"wp-image-930997\" srcset=\"https:\/\/cetechsupport.com\/wp-content\/uploads\/2026\/08\/37mgra-v5-37mgra-pc-03-pc-30-pc-31-1.png 1946w, https:\/\/cetechsupport.com\/wp-content\/uploads\/2026\/08\/37mgra-v5-37mgra-pc-03-pc-30-pc-31-1-235x300.png 235w, https:\/\/cetechsupport.com\/wp-content\/uploads\/2026\/08\/37mgra-v5-37mgra-pc-03-pc-30-pc-31-1-802x1024.png 802w, https:\/\/cetechsupport.com\/wp-content\/uploads\/2026\/08\/37mgra-v5-37mgra-pc-03-pc-30-pc-31-1-768x981.png 768w, https:\/\/cetechsupport.com\/wp-content\/uploads\/2026\/08\/37mgra-v5-37mgra-pc-03-pc-30-pc-31-1-1203x1536.png 1203w, https:\/\/cetechsupport.com\/wp-content\/uploads\/2026\/08\/37mgra-v5-37mgra-pc-03-pc-30-pc-31-1-1604x2048.png 1604w, https:\/\/cetechsupport.com\/wp-content\/uploads\/2026\/08\/37mgra-v5-37mgra-pc-03-pc-30-pc-31-1-9x12.png 9w\" sizes=\"auto, (max-width: 1946px) 100vw, 1946px\" \/><\/a><figcaption class=\"wp-element-caption\">PC 03 Pressure Protection (low or high pressure), PC 30 High Pressure Protection, PC 31 Low Pressure Protection (Diagnosis and Solution) workflow<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/cetechsupport.com\/wp-content\/uploads\/2026\/08\/37mgra-v5-37mgra-pc-03-pc-30-pc-31-2.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1946\" height=\"2485\" src=\"https:\/\/cetechsupport.com\/wp-content\/uploads\/2026\/08\/37mgra-v5-37mgra-pc-03-pc-30-pc-31-2.png\" alt=\"PC 03 Pressure Protection (low or high pressure), PC 30 High Pressure Protection, PC 31 Low Pressure Protection (Diagnosis and Solution) workflow\" class=\"wp-image-930998\" srcset=\"https:\/\/cetechsupport.com\/wp-content\/uploads\/2026\/08\/37mgra-v5-37mgra-pc-03-pc-30-pc-31-2.png 1946w, https:\/\/cetechsupport.com\/wp-content\/uploads\/2026\/08\/37mgra-v5-37mgra-pc-03-pc-30-pc-31-2-235x300.png 235w, https:\/\/cetechsupport.com\/wp-content\/uploads\/2026\/08\/37mgra-v5-37mgra-pc-03-pc-30-pc-31-2-802x1024.png 802w, https:\/\/cetechsupport.com\/wp-content\/uploads\/2026\/08\/37mgra-v5-37mgra-pc-03-pc-30-pc-31-2-768x981.png 768w, https:\/\/cetechsupport.com\/wp-content\/uploads\/2026\/08\/37mgra-v5-37mgra-pc-03-pc-30-pc-31-2-1203x1536.png 1203w, https:\/\/cetechsupport.com\/wp-content\/uploads\/2026\/08\/37mgra-v5-37mgra-pc-03-pc-30-pc-31-2-1604x2048.png 1604w, https:\/\/cetechsupport.com\/wp-content\/uploads\/2026\/08\/37mgra-v5-37mgra-pc-03-pc-30-pc-31-2-9x12.png 9w\" sizes=\"auto, (max-width: 1946px) 100vw, 1946px\" \/><\/a><figcaption class=\"wp-element-caption\">PC 03 Pressure Protection (low or high pressure), PC 30 High Pressure Protection, PC 31 Low Pressure Protection (Diagnosis and Solution) workflow<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><small><em>Fuente del flujo de trabajo: manual de servicio original 37MGRA-02SM PDF. Nombres de c\u00f3digos de error contrastados con 37MGRA-04SI.<\/em><\/small><\/p>","protected":false},"excerpt":{"rendered":"<p>Troubleshooting workflow for PC 03, PC 30, PC 31.<\/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":[243,272,273,274],"class_list":["post-930867","post","type-post","status-publish","format-standard","hentry","category-37mgra-diagnostic-codes","tag-37mgra","tag-pc-03","tag-pc-30","tag-pc-31"],"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\/es\/author\/joshg\/"},"uagb_comment_info":0,"uagb_excerpt":"Troubleshooting workflow for PC 03, PC 30, PC 31.","_links":{"self":[{"href":"https:\/\/cetechsupport.com\/es\/wp-json\/wp\/v2\/posts\/930867","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cetechsupport.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cetechsupport.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cetechsupport.com\/es\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cetechsupport.com\/es\/wp-json\/wp\/v2\/comments?post=930867"}],"version-history":[{"count":5,"href":"https:\/\/cetechsupport.com\/es\/wp-json\/wp\/v2\/posts\/930867\/revisions"}],"predecessor-version":[{"id":931906,"href":"https:\/\/cetechsupport.com\/es\/wp-json\/wp\/v2\/posts\/930867\/revisions\/931906"}],"wp:attachment":[{"href":"https:\/\/cetechsupport.com\/es\/wp-json\/wp\/v2\/media?parent=930867"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cetechsupport.com\/es\/wp-json\/wp\/v2\/categories?post=930867"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cetechsupport.com\/es\/wp-json\/wp\/v2\/tags?post=930867"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}