ErrorCodeDoctor
Panasonic · Air Conditioner
Panasonic Air Conditioner F90 error code
Difficulty: Hard
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Cost: $150–$400
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Duration: Requires professional service
The F90 error means your Panasonic air conditioner detected a fault with either the power factor correction (PFC) circuit or a communication error between the system microcomputer and the compressor microcomputer. Both represent serious electrical or communication faults in the outdoor unit. A qualified technician will need to diagnose the specific cause and repair or replace the affected components.
Common causes
- Power factor correction circuit in the outdoor unit has developed a fault
- Communication error between the main system microcomputer and the compressor control microcomputer
- Power supply abnormality affecting the PFC circuit
How to fix it
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1
Turn off the unit at the circuit breaker
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2
Contact a qualified technician to diagnose and repair the PFC circuit or compressor communication fault