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SiEN12-710A
Troubleshooting
Service Diagnosis
131
4.17 Thermistor or Related Abnormality (Outdoor Unit)
Remote Control
Display
P4, J3, J6, J8, J9, H9
Method of
Malfunction
Detection
This type of error is detected by checking the thermistor input voltage to the microcomputer.
[A thermistor error is detected by checking the temperature.]
Malfunction
Decision
Conditions
The thermistor input is above 4.98 V or below 0.02 V with the power on for 5 seconds.
Error
J3
is judged if the discharge pipe thermistor temperature is smaller than the condenser
thermistor temperature.
In case of
J8
or
J9
, the system will be shut down when the error is detected at all of operating
units.
Supposed
Causes
"
Connector in poor contact
"
Thermistor defective
"
Outdoor unit PCB defective
"
Indoor unit PCB defective
"
Condenser thermistor defective in the case of
J3
error (outdoor unit heat exchanger
thermistor in the cooling mode, or indoor unit heat exchanger thermistor in the heating
mode)
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 ...