Service manual

32
LED1 LED2
Primary current protection
Secondary current protection
High-pressure protection
Defrosting in cooling
3 times Lighting
Discharge temperature
protection
• Check the amount of gas and refrigerant circuit.
• Check the LEV.
( Refer to 10-6.D. )
• Check the outdoor thermistor. ( Refer to 10-6.F. )
4 times Lighting
Low discharge
temperature protection
• Check the amount of gas and refrigerant circuit.
• Check the LEV.
( Refer to 10-6.D. )
5 times Lighting
Cooling high-pressure
protection
This symptom does not mean any abnormality of the
product, but check the following points.
• Indoor unit filter clogging
• Amount of gas
• Short cycle of indoor/outdoor air flow
LED1 LED2
9 times Lighting Service mode
-
Lighting Lighting Normal -
These symptoms do not mean any abnormality of the
product, but check the following points.
• Indoor unit filter clogging
• Amount of gas
• Short cycle of indoor/outdoor air flow
Once Lighting
Twice Lighting
-
When the discharge temperature exceeds 100: during operation.
When the frequency of the compressor is kept 80Hz or more and
the discharge temperature is kept under 39: for more than 20
minutes.
When the outdoor heat exchanger temperature exceeds 58:
during operation.
When the unit is operated with the emergency operation switch.
Symptom: Outdoor unit operates normally.
When the input current exceeds 15A.
When the current of the compressor exceeds 15A.
When the indoor gas pipe temperature exceeds 45: during heating.
When the indoor gas pipe temperature falls 3: or below during cooling.
Symptom: Outdoor unit does not operate normally.
Indication
Abnormal point Detecting method Check points
Indication
Abnormal point Detecting method Check points
OB389 --2qxp 05.1.26 18:15 Page 32