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Mitsubishi Electric · Heat pumps · Mitsubishi Electric Ecodan FTC7 controller (PUZ-WM/WZ, PUHZ-SW)

E0–E5Communication failure between main remote controller and FTC

Name in the manufacturer's documentation (service manual): Communication failure between main remote controller and FTC[1]

In plain words (editorial)

The main remote controller cannot communicate with the FTC control unit of the heat pump. The manual says to check the connection cable for damage or loose connections.

When to call a service technician: If the cable looks fine, the installer checks the controller wiring.

✎ 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] Mitsubishi Electric Ecodan FTC7 PAC-IF081B-E / PAC-IF082B-E / PAC-IF083B-E – Installation Manual (DG79H200H02) , p. 33 official manufacturer document quote verified E0 - E5 Communication failure between main remote controller and FTC
  2. [2] Mitsubishi Electric Ecodan FTC7 PAC-IF081B-E / PAC-IF082B-E / PAC-IF083B-E – Installation Manual (DG79H200H02) , p. 33 official manufacturer document quote verified E0 - E5 Communication failure between main remote controller and FTC Check connection cable for damage or loose connections