159
TROUBLESHOOTING
Error
frequency
until error
display
Display
Treatment
Method of diagnosis / repair
Possible major causes Diagnosis / Repair
※1 ※2
15 in a row Error B B 1. Connector contact failure
2. Engine coolant pump failure
3. Harness disconnection
4. Outdoor control PCB failure
1. Check connector connection
2. Refer to P215, 24)Inspect Engine
Coolant Pump
2/15 minutes Error A B
3/60 minutes Error B B IPM element failure 1. Inspect or replace DCBL PCB
2. Refer to P215, 24)Inspect Engine
Coolant Pump
1 Error C, E N EEPROM failure Check outdoor control PCB
Error E N
Error E N
3 in a row Error B, E N Engine microcomputer communication
failure
Check outdoor control PCB
1 Error B, E N I/F microcomputer communication failure Check outdoor control PCB
12/60 minutes Error A N 1. Connector of refrigerant high pressure
switch or refrigerant high pressure
sensor contact failure
2. Refrigerant high pressure switch failure
3. Harness of refrigerant high pressure
switch disconnection or short circuit
4. Refrigerant high pressure sensor failure
5. Harness of refrigerant high pressure
sensor disconnection or short circuit
6. Refrigerant system failure
(Blockage, overfilling, etc.)
7. Gas mixer failure
8. Condenser heat dissipation failure
1. Check for connector of refrigerant high
pressure switch or refrigerant high
pressure sensor connection
2. Refer to P187, 7)High Pressure Abnor-
mality in Cooling Operation
3. Refer to P188, 8)High Pressure Abnor-
mality in Heating Operation
1ErrorAN
12/60 minutes Error B B 1. Connector of refrigerant low pressure
sensor contact failure
2. Refrigerant low pressure sensor failure
3. Harness of refrigerant low pressure
sensor disconnection or short circuit
4. Refrigerant system failure
(Blockage, overfilling, etc.)
5. Evaporator heat absorption failure
1. Check for connector of refrigerant low
pressure sensor connection
2. Refer to P189, 9)Refrigerant Low
Pressure Abnormality
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