Troubleshooting for Outdoor Unit SiBE121021_C
340 Service Diagnosis
7.7 Discharge Pipe Temperature Control
Remote
Controller
Display
F3
Outdoor Unit LED
Display
A
j
1
i
2
h
3
i
4
h
5
h
Method of
Malfunction
Detection
Detected by the discharge pipe thermistor
Malfunction
Decision
Conditions
îš„
If the temperature detected by the discharge pipe thermistor rises above
A
°C, the
compressor stops.
îš„
The error is cleared when the discharge pipe temperature is dropped below
B
°C.
îš„
If the error repeats 6 times, the system is shut down.
îš„
Reset condition: Continuous run for about 60 minutes without any other error
Supposed
Causes
îš„
Refrigerant shortage
îš„
Defective four way valve
îš„
Defective discharge pipe thermistor
(Defective outdoor heat exchanger thermistor or outdoor temperature thermistor)
îš„
Defective outdoor unit PCB
îš„
Water mixed in refrigerant
îš„
Defective electronic expansion valve
îš„
Defective stop valve
Troubleshooting
Check No.01
Refer to P.362
Check No.12
Refer to P.364
Check No.14
Refer to P.365
A (°C) B (°C)
50/52/58 class 110 95
68/75/80/90 class 120 107
(R14412)
Caution
NG
OK
OK
OK
NG
NG
• Discharge pipe thermistor
• Outdoor heat exchanger thermistor
• Outdoor temperature thermistor
• Refrigerant shortage
• Four way valve
• Water mixed
• Stop valve
Replace the defective
thermistor.
Replace the electronic
expansion valve or the coil.
Refer to the refrigerant line
check procedure.
Replace the outdoor unit
PCB.
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Check No. 01
Check the thermistors.
Check No. 12
Check the electronic
expansion valve.
Check No. 14
Check the refrigerant
line.
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