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SiBE12-519
Troubleshooting
Service Diagnosis
149
4.11
Four Way Valve Abnormality
Remote
Controller
Display
EA
Method of
Malfunction
Detection
The liquid pipe temperature thermistor, the outdoor air temperature thermistor and the outdoor
unit heat exchanger thermistor are checked to see if they function within their normal ranges in
the operating mode.
Malfunction
Decision
Conditions
A following condition occurs after 3 minutes of the compressor start.
Cooling / dry operation
(outdoor unit heat exchanger temp. – liquid pipe temp.) < –5°C
Heating
(liquid pipe temp. – outdoor unit heat exchanger temp.) < 0°C
Supposed
Causes
Connector in poor contact
Thermistor defective
Outdoor unit PCB defective
Four way valve coil or harness defective
Four way valve defective
Foreign substance mixed in refrigerant
Insufficient gas
Summary of Contents for 2MKS40DVMB
Page 10: ...SiBE12 519 List of Functions 1 Part 1 List of Functions 1 Cooling Only 2 2 Heat Pump 4 ...
Page 15: ...Heat Pump SiBE12 519 6 List of Functions ...
Page 29: ...Heat Pump SiBE12 519 20 Specifications ...
Page 135: ...Instruction SiBE12 519 126 System Configuration ...
Page 211: ...Outdoor Unit SiBE12 519 202 Removal Procedure ...