Panasonic

Communication fault between indoor and outdoor units. Check control cable connections.

Outdoor unit communication failure. Check outdoor control board and wiring.

Remote controller communication fault. Check controller and connections.

Room temperature sensor malfunction. Sensor replacement required for proper operation.

Indoor evaporator coil sensor fault. Professional sensor replacement needed.

Indoor fan motor malfunction or speed detection error. Check motor and connections.

Louver swing motor malfunction. Check motor operation and mechanical connections.

Current sensor malfunction. Professional sensor replacement required.

Indoor control board malfunction. Professional PCB inspection and replacement required.

High pressure sensor fault. Professional sensor replacement needed.

Low pressure sensor malfunction. Check sensor and connections.

Compressor discharge temperature sensor fault. Professional replacement required.

Condensate drain pump malfunction. Check pump operation and clear any blockages.

Condensate water level sensor fault. Check sensor and drainage system.

nanoe-X air purification system fault. Check nanoe device and replace if necessary.

Filter reset sensor malfunction. Check sensor and filter system.

Water pump sensor fault. Check pump sensor and operation.

Incompatible indoor and outdoor unit combination. Verify system compatibility.

Refrigerant type setting error. Check system configuration and settings.

General system setting error. Review all system parameters and settings.

Outdoor unit communication failure. Check outdoor control board and wiring.

Outdoor fan motor malfunction. Check motor operation and electrical connections.

Outdoor ambient temperature sensor fault. Replace outdoor sensor.

Compressor discharge temperature sensor malfunction. Professional replacement needed.

Compressor suction temperature sensor fault. Check sensor and connections.

Outdoor heat exchanger sensor fault. Replace outdoor coil temperature sensor.

Outdoor unit control board malfunction. Professional PCB replacement required.

Reversing valve malfunction. Professional valve inspection and replacement needed.

Electronic expansion valve malfunction. Professional valve replacement required.

High pressure switch activated. Check refrigerant charge and condenser coil.

Low pressure protection activated. Check for refrigerant leaks and insufficient charge.

Compressor protection circuit activated. Professional compressor diagnosis required.

System overload protection triggered. Check electrical supply and system capacity.

Indoor coil freeze protection activated. Check airflow and refrigerant levels.

Defrost cycle malfunction. Check defrost sensors and control system.

Oil return system malfunction. Professional oil system diagnosis required.

Insufficient refrigerant detected. Check for leaks and recharge system professionally.

Power supply abnormality detected. Check electrical connections and voltage.

Incorrect phase sequence. Check three-phase electrical connections.

Supply voltage fluctuation detected. Check electrical supply stability.

Supply frequency abnormal. Check electrical supply frequency.

Inverter circuit malfunction. Professional inverter diagnosis and repair required.

Motor malfunction detected. Check motor operation and electrical connections.

Current sensor malfunction. Professional sensor replacement required.

Motor position sensor fault. Professional sensor replacement needed.

Motor speed sensor malfunction. Check sensor and connections.

Motor torque sensor fault. Professional sensor replacement required.