Troubleshooting for Outdoor Unit SiBE121021_C
336 Service Diagnosis
7.3 OL Activation (Compressor Overload)
Remote
Controller
Display
E5
Outdoor Unit LED
Display
A
j
1
i
2
h
3
i
4
h
5
h
Method of
Malfunction
Detection
A compressor overload is detected through compressor OL.
Malfunction
Decision
Conditions
îš„
If the error repeats twice, the system is shut down.
îš„
Reset condition: Continuous run for about 60 minutes without any other error
∗
The operating temperature condition is not specified.
Supposed
Causes
îš„
Refrigerant shortage
îš„
Defective four way valve
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.13
Refer to P.365
Check No.14
Refer to P.365
(R14408)
Caution
YES
NG
∗ Discharge pipe thermistor
NO
OK
OK
NG
∗ Refrigerant shortage
∗ Four way valve
∗ Water mixed
∗ Stop valve
NG
OK
NG
OK
Insert the thermistor in
position.
Replace the discharge pipe
thermistor.
Replace the electronic
expansion valve or the coil.
Refer to the refrigerant line
check procedure.
Replace the outdoor unit
PCB.
Replace the four way valve
or the coil.
Replace the outdoor unit
PCB.
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Discharge pipe
thermistor
disconnected?
Check No. 01
Check the thermistors.
Check No. 12
Check the electronic
expansion valve.
Check No. 13
Check the four way
valve.
Check No. 14
Check the refrigerant
line.
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