Specifications

Troubleshooting SiBE04-624
172 Service Diagnosis
2.23 Discharge Pipe Temperature Control
Remote
Controller Display
F3
Outdoor Unit LED
Display
A5 55 ( - )
Method of
Malfunction
Detection
Discharge pipe temperature control (stop, frequency attenuation, etc.) is executed based on the
temperature detected by the discharge pipe thermistor.
Malfunction
Decision
Conditions

The compressor stops when the discharge pipe temperature is 118°C or more. (Fault
condition is cleared when the discharge pipe temperature is below 85°C)

Shut down when the error repeats 4 times

Clear condition : Continuous operation for 60 minutes
Supposed
Causes

Insufficient gas

Faulty operation of 4-way valve

Defective discharge pipe thermistor
(Defective heat exchanger thermistor or outdoor air thermistor)

Defective outdoor unit PCB

Water mixed in the field piping

Defective electronic expansion valve

Defective stop valve

Defective indoor solenoid valve
Troubleshooting
Check No.2
Refer to P.202
Check No.12
Refer to P.205
Check No.17
Refer to P.209
Replace the thermistor.
Replace main body or coil of
electronic expansion valve.
Refer to remedial actions
related to refrigerant
system check.
Replace the outdoor unit
PCB.
(R3431)
Check No. 2
Thermistor check
Check No. 17
Electronic expansion valve
check
Check No. 12
Refrigerant system check
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
NG
OK
NG
OK
NG
OK
·Discharge pipe thermistor
·Outdoor heat exchanger thermistor
·Outdoor air thermistor
·Insufficient gas
·Faulty operation of 4-way valve
·Water mixed in
·Defective stop valve