{"id":7272,"date":"2025-07-01T09:55:03","date_gmt":"2025-07-01T07:55:03","guid":{"rendered":"https:\/\/www.coldworld.gmbh\/troubleshooting-on-site\/"},"modified":"2025-07-18T15:21:45","modified_gmt":"2025-07-18T13:21:45","slug":"troubleshooting-on-site","status":"publish","type":"post","link":"https:\/\/www.coldworld.gmbh\/en\/system-support\/troubleshooting-on-site\/","title":{"rendered":"Troubleshooting on site"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"7272\" class=\"elementor elementor-7272\">\n\t\t\t\t<div class=\"elementor-element elementor-element-588923cc e-flex e-con-boxed e-con e-parent\" data-id=\"588923cc\" 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-71c0543a elementor-widget elementor-widget-gallery\" data-id=\"71c0543a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"gallery.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-2007c785 e-flex e-con-boxed e-con e-parent\" data-id=\"2007c785\" 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-47391a2a elementor-widget elementor-widget-heading\" data-id=\"47391a2a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">NH\u2083 refrigeration system in large warehouse back in stable operation<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-41f7baee e-flex e-con-boxed e-con e-parent\" data-id=\"41f7baee\" 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-25ec63d8 elementor-widget elementor-widget-text-editor\" data-id=\"25ec63d8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-start=\"227\" data-end=\"554\">For one of our customers, the operator of a large warehouse with three NH\u2083 refrigeration systems, we were asked to assist with a fault-prone system. Our team was on site at short notice and was able to restore the system to a stable and efficient operating state through targeted analysis and technical measures. <\/p><p data-start=\"227\" data-end=\"554\"> <\/p><h3 data-start=\"556\" data-end=\"579\">Plant overview<\/h3><p data-start=\"580\" data-end=\"636\">The warehouse is supplied by three separate refrigeration systems:<\/p><p data-start=\"639\" data-end=\"698\"><strong data-start=\"639\" data-end=\"674\">1\u00d7 single-stage NH\u2083 compound system<\/strong> for normal cooling<\/p><p data-start=\"701\" data-end=\"765\"><strong data-start=\"701\" data-end=\"738\">2\u00d7 two-stage NH\u2083 compound systems<\/strong> for the deep-freeze areas<\/p><p data-start=\"767\" data-end=\"942\"><strong data-start=\"767\" data-end=\"807\">In one of the standard cooling systems,<\/strong> malfunctions occurred during operation, which led to high loads on the condensing unit and unstable control conditions.<\/p><p data-start=\"767\" data-end=\"942\"> <\/p><h3 data-start=\"944\" data-end=\"987\">On-site analysis &#8211; identified problems:<\/h3><p data-start=\"990\" data-end=\"1106\"><strong data-start=\"990\" data-end=\"1031\">Extraneous air in the NH\u2083 refrigerant circuit<\/strong> \u2192 caused unstable pressure conditions and poor heat transfer<\/p><p data-start=\"1109\" data-end=\"1190\"><strong data-start=\"1109\" data-end=\"1143\">Defective high-pressure transmitter<\/strong> \u2192 supplied incorrect values to the control system<\/p><p data-start=\"1193\" data-end=\"1315\"><strong data-start=\"1193\" data-end=\"1234\">Condenser permanently under full load<\/strong> \u2192 high condensing pressures with a condensing temperature that is too cold at the same time<\/p><p data-start=\"1193\" data-end=\"1315\"> <\/p><h3 data-start=\"1317\" data-end=\"1346\">Measures implemented:<\/h3><p data-start=\"1349\" data-end=\"1404\">Professional <strong data-start=\"1362\" data-end=\"1376\">venting of<\/strong> the refrigerant circuit<\/p><p data-start=\"1407\" data-end=\"1499\"><strong data-start=\"1407\" data-end=\"1446\">Replacement of the defective transmitter<\/strong> to restore reliable control<\/p><p data-start=\"1502\" data-end=\"1578\"><strong data-start=\"1502\" data-end=\"1534\">Adjustment of the control parameters<\/strong> to optimize the condensation performance<\/p><h3 data-start=\"1580\" data-end=\"1634\">Before and after: comparison of control behavior<\/h3><p><img decoding=\"async\" class=\"alignnone wp-image-6615\" src=\"https:\/\/www.coldworld.gmbh\/wp-content\/uploads\/2025\/06\/Fremdluft05-300x200.jpg\" alt=\"\" width=\"254\" height=\"169\" srcset=\"https:\/\/www.coldworld.gmbh\/wp-content\/uploads\/2025\/06\/Fremdluft05-300x200.jpg 300w, https:\/\/www.coldworld.gmbh\/wp-content\/uploads\/2025\/06\/Fremdluft05-1024x683.jpg 1024w, https:\/\/www.coldworld.gmbh\/wp-content\/uploads\/2025\/06\/Fremdluft05-768x512.jpg 768w, https:\/\/www.coldworld.gmbh\/wp-content\/uploads\/2025\/06\/Fremdluft05-1536x1024.jpg 1536w, https:\/\/www.coldworld.gmbh\/wp-content\/uploads\/2025\/06\/Fremdluft05-2048x1365.jpg 2048w, https:\/\/www.coldworld.gmbh\/wp-content\/uploads\/2025\/06\/Fremdluft05-2000x1333.jpg 2000w, https:\/\/www.coldworld.gmbh\/wp-content\/uploads\/2025\/06\/Fremdluft05-1000x667.jpg 1000w, https:\/\/www.coldworld.gmbh\/wp-content\/uploads\/2025\/06\/Fremdluft05-1800x1200.jpg 1800w, https:\/\/www.coldworld.gmbh\/wp-content\/uploads\/2025\/06\/Fremdluft05-840x560.jpg 840w\" sizes=\"(max-width: 254px) 100vw, 254px\" \/><\/p><p data-start=\"1635\" data-end=\"1799\">The following image shows an excerpt from the system visualization &#8211; specifically the control behaviour of the condenser fans for controlling the high pressure.<\/p><ul><li data-start=\"1635\" data-end=\"1799\"><strong data-start=\"1803\" data-end=\"1819\">Blue line:<\/strong> High pressure curve<\/li><li data-start=\"1635\" data-end=\"1799\"><strong data-start=\"1841\" data-end=\"1857\">Yellow line:<\/strong> Fan requirement<\/li><\/ul><p data-start=\"1879\" data-end=\"2079\"><strong data-start=\"1879\" data-end=\"1903\">Before our application:<\/strong><br data-start=\"1903\" data-end=\"1906\">Despite 100% fan demand, the pressure increased continuously. The utilization of the fans showed a restless, clocking behavior without any noticeable effect on the pressure level. <\/p><p data-start=\"2081\" data-end=\"2301\"><strong data-start=\"2081\" data-end=\"2109\">After troubleshooting:<\/strong><br data-start=\"2109\" data-end=\"2112\">An even, stable pressure profile with moderate fan utilization shows the success of the measures implemented. The system has been running reliably and energy-efficiently ever since. <\/p><p data-start=\"2081\" data-end=\"2301\"> <\/p><h3 data-start=\"2303\" data-end=\"2318\">Result:<\/h3><p data-start=\"2321\" data-end=\"2374\"><strong data-start=\"2321\" data-end=\"2341\">Stable operation<\/strong> of the affected cooling system<\/p><p data-start=\"2377\" data-end=\"2455\"><strong data-start=\"2377\" data-end=\"2411\">Normalized condenser load<\/strong> and significantly reduced energy consumption<\/p><p data-start=\"2458\" data-end=\"2550\"><strong data-start=\"2458\" data-end=\"2502\">Restoration of operational safety<\/strong> without interfering with the other system areas<\/p><h3 data-start=\"2557\" data-end=\"2571\"> <\/h3><h3 data-start=\"2557\" data-end=\"2571\">Conclusion  <\/h3><p data-start=\"2572\" data-end=\"2873\">Our on-site support has shown how important in-depth specialist knowledge, experience with NH\u2083 systems and a structured analysis are in order to get existing systems back on track quickly and effectively.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-3aa5094d e-flex e-con-boxed e-con e-parent\" data-id=\"3aa5094d\" 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-210e6b0c elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"210e6b0c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5a086b7c elementor-widget elementor-widget-spacer\" data-id=\"5a086b7c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4a0c938d elementor-widget elementor-widget-heading\" data-id=\"4a0c938d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Our projects<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-1390bddc e-flex e-con-boxed e-con e-parent\" data-id=\"1390bddc\" 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-67234810 elementor-widget elementor-widget-nav-menu\" data-id=\"67234810\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"nav-menu.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>NH\u2083 refrigeration system in large warehouse back in [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":7190,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[90],"tags":[],"class_list":["post-7272","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-system-support"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - 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