Troubleshooting for Outdoor Unit
SiSG121917E
153
Part 6 Service Diagnosis
Reference
Reference
Reference
7.12 Discharge Pipe Temperature Control
Error Code
F3
Outdoor Unit LED
Display
A
j
1
i
2
h
3
i
4
h
5
h
Method of Error
Detection
An error is determined with the temperature detected by the discharge pipe thermistor.
Error Decision
Conditions
If the temperature detected by the discharge pipe thermistor rises above
A
°C, the
compressor stops.
The error is cleared when the discharge pipe temperature is dropped below
B
°C.
If the error repeats, the system is shut down.
Reset condition: Continuous run for about 60 minutes without any other error
Supposed
Causes
Defective discharge pipe thermistor
(Defective outdoor heat exchanger thermistor or outdoor temperature thermistor)
Defective electronic expansion valve or coil
Refrigerant shortage
Water mixed in refrigerant
Defective stop valve
Defective outdoor unit PCB
Troubleshooting
Check No.01
Refer to P.169
Check No.12
Refer to P.172
Check No.14
Refer to P.173
A
(°C)
B
(°C)
50/65/80 class
120
102
90 class
120
107
(R20525)
Caution
NG
OK
OK
OK
NG
NG
∗
Discharge pipe thermistor
∗
Outdoor heat exchanger thermistor
∗
Outdoor temperature thermistor
∗
Refrigerant shortage
∗
Water mixed
∗
Stop valve
Check No. 01
Check the thermistors.
Check No. 14
Check the refrigerant
line.
Check No. 12
Check the electronic
expansion valve.
Replace the
defective
thermistor(s).
Replace the electronic
expansion valve or the coil.
Refer to the refrigerant line
check procedure.
Replace the outdoor unit
PCB (main PCB).
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
