{"id":73801,"date":"2023-10-03T11:57:29","date_gmt":"2023-10-03T09:57:29","guid":{"rendered":"https:\/\/www.velasolaris.com\/faq\/what-to-do-in-case-of-error-message-no-throughput-generator-in-circuit-xy\/"},"modified":"2026-02-17T13:51:01","modified_gmt":"2026-02-17T12:51:01","slug":"what-to-do-in-case-of-error-message-no-throughput-generator-in-circuit-xy","status":"publish","type":"faq","link":"https:\/\/www.velasolaris.com\/en\/faq\/what-to-do-in-case-of-error-message-no-throughput-generator-in-circuit-xy\/","title":{"rendered":"What to do in case of error message &#8220;No throughput generator in circuit XY&#8221;?"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">This error message can have various causes. There must be exactly 1 flow generator per circuit. Series-connected pumps are not possible. If three-way valves are used at points where the flow direction is already defined, an overdefinition for the flow occurs.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Examples of constellations that can lead to the problem:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Two pumps in one fluid circuit<\/li>\n\n\n\n<li>Faucet and pump in one fluid circuit<\/li>\n\n\n\n<li>Fluid circuit has no pump<\/li>\n\n\n\n<li>Stratified lance not connected correctly or fluid circuit of a stratified lance not closed<\/li>\n\n\n\n<li>A circuit is divided with a T-piece, where it is not defined how the volume flow is divided<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The last case can be solved by replacing the T-piece with a mixing valve or using 2 pumps on the T-piece.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For visual examples, see the manual, section <a href=\"https:\/\/www.velasolaris.com\/en\/handbuch\/polysun-standard\/solar-thermal-and-conventional-heating-systems\/systems\/tips-and-tricks-to-work-with-designer\/\/#Limitations\">limitations<\/a>.<\/p>\n","protected":false},"author":19748,"comment_status":"open","ping_status":"open","template":"","bereich":[538,541],"software":[902],"class_list":["post-73801","faq","type-faq","status-publish","hentry","bereich-top-story-en","bereich-simulation-en","software-polysun-energy-modeling"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.0 (Yoast SEO v28.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>What to do in case of error message &quot;No throughput generator in circuit XY&quot;? - POLYSUN<\/title>\n<meta name=\"robots\" content=\"noindex, follow\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What to do in case of error message &quot;No throughput generator in circuit XY&quot;?\" \/>\n<meta property=\"og:description\" content=\"This error message can have various causes. There must be exactly 1 flow generator...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.velasolaris.com\/en\/faq\/what-to-do-in-case-of-error-message-no-throughput-generator-in-circuit-xy\/\" \/>\n<meta property=\"og:site_name\" content=\"POLYSUN\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/polysun.switzerland\/\" \/>\n<meta property=\"article:modified_time\" content=\"2026-02-17T12:51:01+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.velasolaris.com\\\/en\\\/faq\\\/what-to-do-in-case-of-error-message-no-throughput-generator-in-circuit-xy\\\/\",\"url\":\"https:\\\/\\\/www.velasolaris.com\\\/en\\\/faq\\\/what-to-do-in-case-of-error-message-no-throughput-generator-in-circuit-xy\\\/\",\"name\":\"What to do in case of error message \\\"No throughput generator in circuit XY\\\"? - POLYSUN\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.velasolaris.com\\\/en\\\/#website\"},\"datePublished\":\"2023-10-03T09:57:29+00:00\",\"dateModified\":\"2026-02-17T12:51:01+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.velasolaris.com\\\/en\\\/faq\\\/what-to-do-in-case-of-error-message-no-throughput-generator-in-circuit-xy\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.velasolaris.com\\\/en\\\/faq\\\/what-to-do-in-case-of-error-message-no-throughput-generator-in-circuit-xy\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.velasolaris.com\\\/en\\\/faq\\\/what-to-do-in-case-of-error-message-no-throughput-generator-in-circuit-xy\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.velasolaris.com\\\/en\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"FAQ\",\"item\":\"https:\\\/\\\/www.velasolaris.com\\\/en\\\/faq\\\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"What to do in case of error message &#8222;No throughput generator in circuit XY&#8220;?\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.velasolaris.com\\\/en\\\/#website\",\"url\":\"https:\\\/\\\/www.velasolaris.com\\\/en\\\/\",\"name\":\"POLYSUN\",\"description\":\"by Vela Solaris\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.velasolaris.com\\\/en\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.velasolaris.com\\\/en\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/www.velasolaris.com\\\/en\\\/#organization\",\"name\":\"POLYSUN\",\"url\":\"https:\\\/\\\/www.velasolaris.com\\\/en\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.velasolaris.com\\\/en\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/www.velasolaris.com\\\/wp-content\\\/uploads\\\/2020\\\/07\\\/Polysun-Logo.svg\",\"contentUrl\":\"https:\\\/\\\/www.velasolaris.com\\\/wp-content\\\/uploads\\\/2020\\\/07\\\/Polysun-Logo.svg\",\"width\":1,\"height\":1,\"caption\":\"POLYSUN\"},\"image\":{\"@id\":\"https:\\\/\\\/www.velasolaris.com\\\/en\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/polysun.switzerland\\\/\",\"https:\\\/\\\/www.linkedin.com\\\/company\\\/vela-solaris\\\/\"]}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"What to do in case of error message \"No throughput generator in circuit XY\"? - POLYSUN","robots":{"index":"noindex","follow":"follow"},"og_locale":"en_US","og_type":"article","og_title":"What to do in case of error message \"No throughput generator in circuit XY\"?","og_description":"This error message can have various causes. 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