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

J0Communication failure between FTC and wireless receiver

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

In plain words (editorial)

The FTC control unit cannot communicate with the wireless receiver. The manual says to check the connection cable and make sure the wireless remote controller's battery is not flat.

When to call a service technician: If a fresh battery does not help, contact the installer.

✎ 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 J0 Communication failure between FTC and wireless receiver
  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 J0 Communication failure between FTC and wireless receiver Check connection cable for damage or loose connections
  3. [3] Mitsubishi Electric Ecodan FTC7 PAC-IF081B-E / PAC-IF082B-E / PAC-IF083B-E – Installation Manual (DG79H200H02) , p. 33 official manufacturer document quote verified Check wireless remote controller’s battery is not flat