Troubleshooting
SiBE04-101
100
Service Diagnosis
4.13
Operation Halt Due to High Pressure Control for Cooling Operation
Remote Controller
Display
A5
Outdoor unit LED
Display
A
5
1
4
2
3
3
4
4
4
Method of
Malfunction
Detection
During cooling operation, the temperature detected by the defrost thermistor is used for the high pressure
control (stop, frequency drooping, etc.).
Malfunction
Decision
Conditions
When the temperature detected by defrost thermistor exceeds 65˚C during cooling operation. (Malfunction
condition canceled when the temperature drops to 54˚C or below)
Supposed Causes
Insufficient space smaller than required
Faulty outdoor unit fan
Faulty electronic expansion valve
Faulty defrost thermistor
Faulty PCB
Faulty stop valve
Overfilled refrigerant
Troubleshooting
Check No.2
Refer to P.120
Check No.4
Refer to P.120
Check No.20
Refer to P.125
Check No.1
Refer to P.119
Check No.20
Electronic expansion valve check
Check the installation space.
Normal
Replace the fan motor.
Repair the connector or fan
motor lead wires.
Replace the heat exchanger
thermistor.
Repairs are completed.
(Observation required)
Replace PCB.
Check No.4
Outdoor fan check
Abnormal
Normal
Judgment
Abnormal
YES
NO
Check No.1
Heat exchanger thermistor check
Normal
Replace the electronic
expansion valve or coil.
Replace the PCB.
Judgment
Abnormal
Normal
Change the air outlet grille
position.
Change the installation location.
Clean the heat exchanger.
Check No.2
Installation condition
check
Abnormal
Is
an abnormality
reproduced in spite of the
replacement of
refrigerant?
(R1175)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
SiBE04-101.book Page 100 Monday, October 15, 2001 3:08 PM