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Troubleshooting
SiEN12-710A
124
Service Diagnosis
4.12 Discharge Pipe Temperature Control
Remote Control
Display
F3
Method of
Malfunction
Detection
The discharge pipe temperature control (stop, frequency drooping, etc.) is checked with the
temperature being detected by the discharge pipe thermistor.
Malfunction
Decision
Conditions
If the temperature being detected by the discharge pipe thermistor rises, the compressor will
stop. The temperature at which the compressor halts varies according to the frequency.
(1) 110°C when the frequency is above 30Hz on ascending or above 25Hz on descending.
(2) 108°C when the frequency is below 30Hz on ascending or below 25Hz on descending.
"
The error is cleared when the temperature has dropped below 95°C.
"
If the compressor stops 6 times successively due to abnormal discharge pipe temperature,
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).
Supposed
Causes
"
Refrigerant shortage
"
Four way valve malfunctioning
"
Discharge pipe thermistor defective
(heat exchanger or outdoor temperature thermistor defective)
"
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.06
Refer to P.149
Check No.11
Refer to P.152
(R7141)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Malfunctioning
Functioning
Functioning
Functioning
Malfunctioning
Malfunctioning
Check No. 06
Check the thermistors.
Check No. 11
Check the refrigerant line.
Check No. 04
Check the electronic
expansion valve.
Replace the defective
thermistor.
Replace the valve itself or
the coil.
Refer to the refrigerant line
check procedure.
Replace the outdoor unit
PCB.
Discharge pipe thermistor
Outdoor unit heat exchanger thermistor
Outdoor temperature thermistor
Refrigerant shortage
Four way valve malfunctioning
Water mixed
Stop valve defective
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 ...