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SiBE12-933_A
Troubleshooting
Service Diagnosis
185
4.8
OL Activation (Compressor Overload)
Remote
Controller
Display
E5
Method of
Malfunction
Detection
A compressor overload is detected through compressor OL.
Malfunction
Decision
Conditions
If the compressor OL is activated twice, the system is shut down.
The error counter is reset if this or any other error does not occur during the following 60-
minute compressor running time (total time).
∗
The operating temperature condition is not specified.
Supposed
Causes
Refrigerant shortage
Four way valve malfunctioning
Outdoor unit PCB defective
Water mixed in the local piping
Electronic expansion valve defective
Stop valve defective
Troubleshooting
Check No.04
Refer to P.213
Check No.05
Refer to P.214
Check No.06
Refer to P.215
Check No.11
Refer to P.218
(R7137)
Insert the thermistor in
position.
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Discharge pipe
thermistor
disconnected?
YES
Check No. 06
Check the thermistors.
NO
Functioning
Check No. 04
Check the electronic
expansion valve.
Check No. 05
Check the four way
valve.
Check No. 11
Check the refrigerant
line.
Functioning
Functioning
Functioning
Malfunctioning
∗
Discharge pipe thermistor
Malfunctioning
Malfunctioning
Malfunctioning
∗
Refrigerant shortage
∗
Water mixed
∗
Stop valve defective
Replace the discharge pipe
thermistor.
Replace the valve itself or
the coil.
Replace the four way valve
coil or the valve itself.
Replace the outdoor unit
PCB.
Refer to the refrigerant line
check procedure.
Replace the outdoor unit
PCB.