Four Way Valve Abnormality - Daikin CTXG09QVJUW Service Manual

Troubleshooting for Outdoor Unit

7.11 Four Way Valve Abnormality

EA
Error Code
Outdoor Unit LED A
Display
Method of Error 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.
Detection
Error Decision The following condition continues for A seconds after the compressor has started.
Conditions
Other than below
Heating (when outdoor temperature is below -15
Tde: outdoor heat exchanger temperature
Supposed
Causes
174
j i h h h
1 2 3 4
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)
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
h
5
°C °F)
(5
SiUS121632EA
A (seconds)
240
460
Service Diagnosis