Mitsubishi Electric · Heat pumps · Mitsubishi Electric Ecodan PUZ-WM outdoor unit (R32)
EEIncorrect connection (outdoor unit does not receive the signals of I/F or FTC)
Name in the manufacturer's documentation (service manual): Incorrect connection (outdoor unit does not receive the signals of I/F or FTC)
[1]
This page only quotes the original English documentation. A plain-language explanation has not been written yet, so the page is not indexed by search engines.
For technicians
Detection conditions (source text)
- The outdoor unit does not receive the signals of I/F or FTC[2]
Possible causes (source text)
- A device other than Interface unit or Flow temp. controller unit is connected to the unit[3]
Steps given by the manufacturer (source text)
- Connect I/F or FTC to the unit[4]
⚠ 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 – Service Manual: Air to water heat pump units, outdoor unit PUZ-WM50VHA … PUZ-WM112YAA (OCH727 REVISED EDITION-A, 12/2023) (OCH727A (12/2023)) , p. 24 official manufacturer document quote verified
- [2] Mitsubishi Electric – Service Manual: Air to water heat pump units, outdoor unit PUZ-WM50VHA … PUZ-WM112YAA (OCH727 REVISED EDITION-A, 12/2023) (OCH727A (12/2023)) , p. 24 official manufacturer document quote verified
the outdoor unit does not receive the sig-
- [3] Mitsubishi Electric – Service Manual: Air to water heat pump units, outdoor unit PUZ-WM50VHA … PUZ-WM112YAA (OCH727 REVISED EDITION-A, 12/2023) (OCH727A (12/2023)) , p. 24 official manufacturer document quote verified
a device other than interface
- [4] Mitsubishi Electric – Service Manual: Air to water heat pump units, outdoor unit PUZ-WM50VHA … PUZ-WM112YAA (OCH727 REVISED EDITION-A, 12/2023) (OCH727A (12/2023)) , p. 24 official manufacturer document quote verified
connect i/f or ftc to the unit