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Viessmann · Heat pumps · Viessmann Vitocal 250-A (One Base, monobloc)

F.454Incorrect version of operating software for the electronics modules

Name in the manufacturer's documentation (service manual): Incorrect version of operating software for the electronics modules[1]

In plain words (editorial)

The electronics modules run incompatible operating software versions; the refrigerant circuit is locked until the correct version is installed.

When to call a service technician: Contact your heating contractor or Viessmann technical service.

✎ 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] Viessmann – Service instructions: System configuration and diagnosis for heat pumps with Viessmann One Base (6194799 GB, 3/2022) (6194799 GB (3/2022)) , p. 55 manufacturer document – copy from a distributor quote verified F.454
  2. [2] Viessmann – Service instructions: System configuration and diagnosis for heat pumps with Viessmann One Base (6194799 GB, 3/2022) (6194799 GB (3/2022)) , p. 55 manufacturer document – copy from a distributor quote verified Check the version of the
  3. [3] Viessmann – Service instructions: System configuration and diagnosis for heat pumps with Viessmann One Base (6194799 GB, 3/2022) (6194799 GB (3/2022)) , p. 55 manufacturer document – copy from a distributor quote verified Install correct software version if required
  4. [4] Viessmann – Service instructions: System configuration and diagnosis for heat pumps with Viessmann One Base (6194799 GB, 3/2022) (6194799 GB (3/2022)) , p. 55 manufacturer document – copy from a distributor quote verified The refrigerant circuit is locked