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SiUS092230EA
Troubleshooting for Outdoor Unit
Part 6 Service Diagnosis
171
7.8 Four Way Valve Abnormality
Error Code
EA
Method of Error
Detection
The room temperature thermistor and the indoor heat exchanger thermistor are checked if they
function within their normal ranges in each operation mode.
Error Decision
Conditions
The following condition continues over 10 minutes after operating for 5 minutes.
Cooling/Dry
A
–
B
< –5°C (
A
–
B
< –9°F)
Heating
B
–
A
< –5°C (
B
–
A
< –9°F)
A
: Room thermistor temperature
B
: Indoor heat exchanger temperature
If the error repeats, the system is shut down.
Reset condition: Continuous run for about 60 minutes without any other error
Supposed
Causes
Disconnection of four way valve coil
Defective four way valve, coil, or harness
Defective outdoor unit PCB
Defective thermistor
Refrigerant shortage
Water mixed in refrigerant
Defective stop valve
Summary of Contents for RX-W Series
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Page 207: ...SiUS092230EA Check Part 6 Service Diagnosis 201 15 18 24 class R25105 1 2 3 4 Multimeter ...
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Page 239: ...SiUS092230EA Piping Diagrams Part 8 Appendix 233 RX24WMVJU9 3D141502 ...