Error 18, Error 19 (Abnormal in cooling circuit)
LCD indication Check point Symptom (1) Symptom (2) Remedy
Compressor(s) burned out
No discoloraion found in oil
㹢Replacement of compressor(s), dryer
Discoloration found in oil 㹢Replacement of compressor(s), dryer and oil separator
Discoloration found in oil of oil separator
㹢Replacement of Cascade foaming
Oil leak
Pipe(s) are disconnected
Crack/hole is found in
valve
Leak in frame pipe
Capillary blockage 㹢Replacement of capillary
Cooling performce is poor if refrigerant is
added.
㹢Replacement of compressor and oil separator
Replacement of cascade foaming if the symptom is still
present.
Error 10, Error 16, Error 17 (Abnormal in fan motor)
LCD indication Check point Symptom (1) Symptom (2) Remedy
Is fan motor locked?
Fan motor does not rotate smoothly
when it is rotated manually.
㹢Replacement of fan motor
Is fan motor open
circuited?
㹢Check conductivity in lead wires of fan motor by tester.
Replacement of fan motor
Error 10 Condenser temp is abnormal. Dust is piled up on condenser or grille. 㹢Clean up grille and open a grille to clean up condenser
Error 16 Fan motor A abnormal.
Error 17 Fan motor B abnormal.
㹢Weld and reprocess pipe, replacement of new components
㹢When gas leaked at low pressure side,
air or moisture intakes that maybe caused oil deterioration.
Replace compressor.
Error 18 Cooling circuit A abnormal.
Error 19 Cooling circuit B abnormal.
Does compressor(s)
turn on?
Gas leak
Troubleshooting
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