SiBE12-908
Troubleshooting
Service Diagnosis
131
2.21
Discharge Pipe Temperature Control
Remote
Controller Display
F3
Outdoor Unit LED
Display
A
5
5
5
( - )
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
If the temperature being detected by the discharge pipe thermistor rises, the compressor will
stop. The temperature at which the compressor halts varies according to the frequency.
(1) 110°C when the frequency is above 30Hz on ascending or above 25Hz on descending.
(2) 108°C when the frequency is below 30Hz on ascending or below 25Hz on descending.
The error is cleared when the temperature has dropped below 95°C.
If the compressor stops 6 times successively due to abnormal discharge pipe temperature,
the system will be shut down.
The error counter will reset itself if this or any other error does not occur during the following
60-minute compressor running time (total time).
Supposed
Causes
Insufficient gas
Faulty operation of four 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
Troubleshooting
Check No.02
Refer to P.162
Check No.12
Refer to P.165
Check No.17
Refer to P.169
(R9442)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Malfunctioning
z
Discharge pipe thermistor
z
Outdoor unit heat exchanger thermistor
z
Outdoor temperature thermistor
z
Refrigerant shortage
z
Four way valve malfunctioning
z
Water mixed
z
Stop valve defective
Functioning
Functioning
Functioning
Malfunctioning
Malfunctioning
Replace the
defective
thermistor.
Replace the valve itself or
the coil.
Refer to the refrigerant line
check procedure.
Replace the outdoor unit
PCB.
Check No. 02
Check the
thermistors.
Check No. 17
Check the electronic
expansion valve.
Check No. 12
Check the
refrigerant line.
