Troubleshooting
SiBE041012_A
99
Service Diagnosis
4.15 Discharge Pipe Temperature Control
Remote
Controller
Display
F3
Method of
Malfunction
Detection
An error is determined with the temperature detected by the discharge pipe thermistor.
Malfunction
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 has dropped below
B
°C.
<25/35 class>
<50 class>
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 outdoor electronic expansion valve or coil
Refrigerant shortage
Defective four way valve
Water mixed in refrigerant
Defective stop valve
Defective outdoor unit PCB
Troubleshooting
Check No.01
Refer to P.123
Check No.12
Refer to P.125
Check No.14
Refer to P.126
Stop temperatures
A
(°C)
B
(°C)
(1) above 45 Hz (rising), above 40 Hz (dropping)
110
97
(2) 30 ~ 45 Hz (rising), 25 ~ 40 Hz (dropping)
105
92
(3) below 30 Hz (rising), below 25 Hz (dropping)
99
86
A
(°C)
B
(°C)
110
95
(R15274)
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
coil.
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.
