Troubleshooting for Outdoor Unit SiUS121632EA
174 Service Diagnosis
7.11 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
A (seconds)
Other than below 240
Heating (when outdoor temperature is below -15
°C
(5
°F)
460
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