Mitsubishi Electric · Heat pumps · Mitsubishi Electric Ecodan FTC7 controller (PUZ-WM/WZ, PUHZ-SW)
E9Outdoor unit receives no signal from indoor unit.
Name in the manufacturer's documentation (service manual): Outdoor unit receives no signal from indoor unit.
[1]
In plain words (editorial)
The outdoor unit receives no signal from the indoor unit. The manual says to check that both units are switched on and that the connection cable is not damaged or loose.
When to call a service technician: If both units have power, the installer checks the connection cable.
✎ editorial – written from the cited sources, not a manufacturer statement. Status: draft.
For technicians
Steps given by the manufacturer (source text)
- Check both units are switched on. Check connection cable for damage or[2]
⚠ Work on refrigerant circuits, mains electricity and PV DC wiring is for qualified technicians only.
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] Mitsubishi Electric Ecodan FTC7 PAC-IF081B-E / PAC-IF082B-E / PAC-IF083B-E – Installation Manual (DG79H200H02) , p. 33 official manufacturer document quote verified
E9 Outdoor unit receives no signal from indoor unit.
- [2] Mitsubishi Electric Ecodan FTC7 PAC-IF081B-E / PAC-IF082B-E / PAC-IF083B-E – Installation Manual (DG79H200H02) , p. 33 official manufacturer document quote verified
Check both units are switched on. Check connection cable for damage or