SiUS122226E Troubleshooting for Outdoor Unit
Part 6 Service Diagnosis 205
7.12 Four Way Valve Abnormality
Error Code EA
Outdoor Unit LED
Display
A j 1 i 2 h 3 h 4 h 5 h
Method of Error
Detection
The liquid pipe thermistor and the outdoor heat exchanger thermistor are checked to see if they
function within their normal ranges in the operating mode.
Error Decision
Conditions
The following condition continues for A seconds after the compressor has started.
Cooling operation
The lowest liquid pipe temperature among the rooms in operation –Tde > 45°C (81°F)
Heating operation
The highest liquid pipe temperature among the rooms in operation –Tde < 0°C (0°F)
Tde: outdoor heat exchanger temperature
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
2/3/4MXS 5MXS 2/3MXL(H) 4MXL(H)
A (seconds) Cooling 240 460 240 460
Heating 1 1 1 1
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