28
Check code
Abnormal point and detection method
Cause
Countermeasure
PL
Abnormal refrigerant circuit
During Cooling, Dry, or Auto Cooling
operation, the following conditions are
regarded as failures when detected for 1
second.
a) The compressor continues to run for 30
or more seconds.
b) The liquid pipe temperature or the
condenser/evaporator temperature is
75°C or more.
These detected errors will not be
cancelled until the power source is
reset.
1 Abnormal operation of 4-way
valve
2 Disconnection of or leakage in
refrigerant pipes
3 Air into refrigerant piping
4 Abnormal operation (no rotation)
of indoor fan
• Defective fan motor
• Defective indoor control board.
5 Defective refrigerant circuit
(clogging)
1 When this error occurs, be sure to replace
the 4-way valve.
2 Check refrigerant pipes for disconnection or
leakage.
3 After the recovery of refrigerant, vacuum dry
the whole refrigerant circuit.
4 Refer to section "9-6-2. DC Fan motor (fan
motor/indoor controller board)".
5 Check refrigerant circuit for operation.
To avoid entry of moisture or air into
refrigerant circuit which could cause
abnormal high pressure, purge air in
refrigerant circuit or replace refrigerant.
Pb
1 Defective fan motor
2 Defective indoor controller board
12 Refer to "9-6-2. DC Fan Motor (fan motor/
indoor controller board)".
Fan motor trouble
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