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

F.687EHCU electronics module communication error

Name in the manufacturer's documentation (service manual): EHCU electronics module communication error[1]

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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. 59 manufacturer document – copy from a distributor quote verified F.687
  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. 59 manufacturer document – copy from a distributor quote verified Check connections on EH- CU electronics module
  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. 59 manufacturer document – copy from a distributor quote verified Check whether components are wrongly connected
  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. 59 manufacturer document – copy from a distributor quote verified Isolate the system from the
  5. [5] Viessmann – Service instructions: System configuration and diagnosis for heat pumps with Viessmann One Base (6194799 GB, 3/2022) (6194799 GB (3/2022)) , p. 59 manufacturer document – copy from a distributor quote verified Restart the system
  6. [6] Viessmann – Service instructions: System configuration and diagnosis for heat pumps with Viessmann One Base (6194799 GB, 3/2022) (6194799 GB (3/2022)) , p. 59 manufacturer document – copy from a distributor quote verified If the fault persists, replace the EHCU electronics module
  7. [7] Viessmann – Service instructions: System configuration and diagnosis for heat pumps with Viessmann One Base (6194799 GB, 3/2022) (6194799 GB (3/2022)) , p. 59 manufacturer document – copy from a distributor quote verified The heat pump is switched off.