SiBE121135_A Troubleshooting for Outdoor Unit
Service Diagnosis 214
7.11 Discharge Pipe Temperature Control
Error Code F3
Outdoor Unit LED
Display
A j 1 i 2 h 3 i 4 h 5 h
∗ LED5 is equipped only on the 5-room model.
Method of Error
Detection
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.
îš„ The error is cleared when the discharge pipe temperature is dropped below
B °C.
îš„ If the error repeats, the system is shut down.
îš„ Reset condition: Continuous run for about 60 minutes without any other error
Supposed
Causes
îš„ Defective discharge pipe thermistor
(Defective outdoor heat exchanger thermistor or outdoor temperature thermistor)
îš„ Defective outdoor electronic expansion valve or coil
îš„ Refrigerant shortage
îš„ Defective four way valve
îš„ Water mixed in refrigerant
îš„ Defective stop valve
îš„ Defective outdoor unit PCB
Troubleshooting
Check No.01
Refer to P.230
Check No.12
Refer to P.234
Check No.14
Refer to P.235
A (°C) B (°C)
40/50/52/58 class 110 95
68/75/80/90 class 120 107
(R15286)
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
Check No. 01
Check the thermistors.
Check No. 14
Check the refrigerant
line.
Check No. 12
Check the outdoor electronic
expansion valve.
Replace the defective
thermistor.
Replace the outdoor
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.
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