Haier · Split air conditioners · Haier Flexis Plus (wall-mounted split, R32)
F3Communication error between module board and main PCB board
Name in the manufacturer's documentation (service manual): Communication error between module board and main PCB board
[1]
In plain words (editorial)
The IPM module and the outdoor main PCB cannot communicate – a broken board, IPM module or a disconnected communication wire.
When to call a service technician: Call a service technician.
✎ editorial – written from the cited sources, not a manufacturer statement. Status: draft.
For technicians
Detection conditions (source text)
- Communication is detected by checking the IPM module and the outdoor PCB[2]
Possible causes (source text)
⚠ 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] Haier – Service Manual, Model AS35S2SF1FA-BH (Flexis Plus), Version V1, 2020-11-14 (V1 (2020-11-14)) , p. 29 official manufacturer document quote verified
- [2] Haier – Service Manual, Model AS35S2SF1FA-BH (Flexis Plus), Version V1, 2020-11-14 (V1 (2020-11-14)) , p. 35 official manufacturer document quote verified
Communication is detected by checking the IPM module and the outdoor PCB
- [3] Haier – Service Manual, Model AS35S2SF1FA-BH (Flexis Plus), Version V1, 2020-11-14 (V1 (2020-11-14)) , p. 35 official manufacturer document quote verified
The outdoor PCB is broken
- [4] Haier – Service Manual, Model AS35S2SF1FA-BH (Flexis Plus), Version V1, 2020-11-14 (V1 (2020-11-14)) , p. 35 official manufacturer document quote verified
The IPM module is broken
- [5] Haier – Service Manual, Model AS35S2SF1FA-BH (Flexis Plus), Version V1, 2020-11-14 (V1 (2020-11-14)) , p. 35 official manufacturer document quote verified
Communication wiring disconnected