Aux F8

Critical

Inverter — Outdoor unit communication error between main PCB board and module board.

Aux F8: Outdoor unit communication error between main PCB board and module board. This fault typically halts operation and needs immediate attention.

Possible causes

Wiring between main and module board broken or board faulty.

Check steps

Check wiring between the boards.

Affected parts

Modulplatine

Safety note

Discharge capacitors, isolate power.

Reviewed by Anıl Güzeldemir — in the refrigeration machine room since 2006, developer of Enthalio.

Look up in Enthalio →

Related fault codes

Sensor fault.E5 Indoor room sensor open/short.E1 Indoor coil pipe sensor open/short.E2 Indoor fan motor fault.E3 Indoor ↔ outdoor communication error.E6 Outdoor air sensor open/short.F1