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Vaillant · Heat pumps · Vaillant aroTHERM plus with uniTOWER plus

S.277Building circuit: Pump fault

Name in the manufacturer's documentation (service manual): Building circuit: Pump fault[1]

In plain words (editorial)

The heating circuit pump is not running. The heat pump switches off for 10 minutes and restarts; after three unsuccessful restarts it switches off with a fault message.

When to call a service technician: If the fault message appears, contact a heating engineer.

✎ editorial – written from the cited sources, not a manufacturer statement. Status: draft.

The Polish page has more detail (plain-language explanation, safe checks, guides): Read in Polish →

Sources

Every statement has a footnote to the document and PDF page. “Quote verified” means the quote was found automatically in the text of that page.

  1. [1] Vaillant uniTOWER plus VIH QW 190/6 E – Operating, installation and maintenance instructions (0020291525_05) (0020291525_05) , p. 58 official manufacturer document quote verified S.277 Building circuit: Pump
  2. [2] Vaillant uniTOWER plus VIH QW 190/6 E – Operating, installation and maintenance instructions (0020291525_05) (0020291525_05) , p. 58 official manufacturer document quote verified If the building circuit pump is inactive, the heat pump is
  3. [3] Vaillant uniTOWER plus VIH QW 190/6 E – Operating, installation and maintenance instructions (0020291525_05) (0020291525_05) , p. 58 official manufacturer document quote verified If the building circuit pump is inactive, the heat pump is switched off for 10 minutes and is then restar- ted