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SiEN12-710A
Troubleshooting
Service Diagnosis
119
4.8 OL Activation (Compressor Overload)
Remote Control
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 will be shut down.
"
The error counter will reset itself 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.146
Check No.05
Refer to P.148
Check No.06
Refer to P.149
Check No.11
Refer to P.152
(R7137)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
YES
NO
Check No. 06
Check the thermistors.
Check No. 05
Check the four way valve.
Check No. 04
Check the electronic
expansion valve.
Insert the thermistor in
position.
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.
Discharge
pipe thermistor
disconnected?
Malfunctioning
∗
Discharge pipe thermistor
∗
Refrigerant shortage
∗
Water mixed
∗
Stop valve defective
Malfunctioning
Malfunctioning
Malfunctioning
Functioning
Functioning
Functioning
Functioning
Check No. 11
Check the refrigerant line.
Summary of Contents for 2MKS40FV1B
Page 11: ...Introduction SiEN12 710A x ...
Page 12: ...SiEN12 710A List of Functions 1 Part 1 List of Functions 1 Cooling Only 2 2 Heat Pump 4 ...
Page 17: ...Heat Pump SiEN12 710A 6 List of Functions ...
Page 25: ...Heat Pump SiEN12 710A 14 Specifications ...
Page 111: ...Instruction SiEN12 710A 100 Operation Manual ...
Page 199: ...Wiring Diagrams SiEN12 710A 188 Appendix ...
Page 203: ...SiEN12 710A iv Index ...