Fault Codes / Haier / F22

Haier F22

Critical

AC overvoltage protection (outdoor)

Haier F22: AC overvoltage protection (outdoor) This fault typically halts operation and needs immediate attention.

Possible causes

Mains voltage too high/unstable
Faulty inverter PCB

Check steps

Measure mains voltage at outdoor unit
Check inverter PCB, replace if needed

Affected parts

Inverter-Platine

Safety note

Inverter capacitors may be charged — wait for discharge.

Source: Haier resmi servis kılavuzu — Haier service documentation (fault-codes.jimdofree.com Haier list, corroborated by Haier service manual excerpts on manualslib and scribd 'Haier Fault Codes' document): F22 = 'Overcurrent protection of AC electricity for the outdoor model' — an outdoor-unit AC overcurrent protect…

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

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