Samsung

Room temperature sensor fault. Check sensor connections and replace if necessary.

Evaporator coil temperature sensor malfunction. Professional sensor replacement required.

Condenser coil temperature sensor fault. Replace outdoor coil sensor.

Ambient temperature sensor malfunction. Check outdoor sensor wiring.

Indoor/outdoor unit communication failure. Inspect control cable connections.

Indoor fan motor malfunction. Check motor operation and speed feedback.

Outdoor fan motor fault. Inspect fan motor and electrical connections.

Compressor discharge temperature abnormal. Professional diagnosis required.

Compressor suction temperature abnormal. Check refrigerant system.

Control board communication fault. Check board connections.

Condensate water level sensor fault. Check drainage system.

Air filter sensor malfunction. Check filter and sensor.

Remote controller sensor fault. Check controller and connections.

Humidity sensor malfunction. Check sensor and connections.

Motor position sensor fault. Professional sensor replacement required.

Compressor drive circuit malfunction. Professional diagnosis required.

Compressor protection activated. Check electrical supply and refrigerant.

Current sensor malfunction. Professional sensor replacement needed.

Voltage sensor fault. Check electrical connections and sensor.

Inverter control communication fault. Professional inverter diagnosis required.

Main control board malfunction. Professional board replacement required.

System configuration error. Check system settings and parameters.

System calibration error. Professional recalibration required.

Control sequence malfunction. Professional diagnosis required.

Electronic control valve malfunction. Professional valve replacement needed.

High pressure switch activated. Check refrigerant charge and system restrictions.

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

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

Reversing valve malfunction. Professional valve inspection and replacement needed.

Air filter severely clogged. Clean or replace air filters immediately.

Fan speed control fault. Check fan motor and control electronics.

Condensate overflow protection activated. Check drain system.

Defrost cycle malfunction. Check defrost sensors and control.

Fresh air damper control fault. Check damper motor and position.

Refrigerant flow control malfunction. Check expansion valve operation.

Compressor overheating protection. Check refrigerant levels and electrical supply.

Inverter circuit overheating. Check ventilation and component condition.

Supply voltage too high. Check electrical supply and voltage regulation.

Electrical current too high. Check wiring and electrical connections.

System temperature too high. Check system operation and ventilation.