Viessmann · Heat pumps · Viessmann Vitocal 250-A (One Base, monobloc)
F.103HMI programming unit communication error
Name in the manufacturer's documentation (service manual): HMI programming unit communication error
[1]
In plain words (editorial)
Communication error with the HMI programming unit – no operation possible. The manual's remedy is replacing the programming unit.
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] Viessmann – Service instructions: System configuration and diagnosis for heat pumps with Viessmann One Base (6194799 GB, 3/2022) (6194799 GB (3/2022)) , p. 53 manufacturer document – copy from a distributor quote verified
F.103
- [2] Viessmann – Service instructions: System configuration and diagnosis for heat pumps with Viessmann One Base (6194799 GB, 3/2022) (6194799 GB (3/2022)) , p. 53 manufacturer document – copy from a distributor quote verified
Replace HMI programming unit
- [3] Viessmann – Service instructions: System configuration and diagnosis for heat pumps with Viessmann One Base (6194799 GB, 3/2022) (6194799 GB (3/2022)) , p. 53 manufacturer document – copy from a distributor quote verified
No operation possible