Four Way Valve Abnormality - Daikin 2MXS-W Series Service Manual

SiUS122226E

7.12 Four Way Valve Abnormality

EA
Error Code
Outdoor Unit LED A j 1 i 2 h 3 h 4 h 5 h
Display
Method of Error
The liquid pipe thermistor and the outdoor heat exchanger thermistor are checked to see if they
Detection function within their normal ranges in the operating mode.
Error Decision
The following condition continues for A seconds after the compressor has started.
Conditions
 Cooling operation
 Heating operation
A (seconds)
Tde: outdoor heat exchanger temperature
Supposed  Disconnection of four way valve coil
Causes  Defective four way valve, coil, or harness
 Defective outdoor unit PCB
 Defective thermistor
 Refrigerant shortage
 Water mixed in refrigerant
 Defective stop valve
Part 6 Service Diagnosis
The lowest liquid pipe temperature among the rooms in operation –Tde > 45°C (81°F)
The highest liquid pipe temperature among the rooms in operation –Tde < 0°C (0°F)
Cooling
Heating
2/3/4MXS 5MXS
240 460
1 1
Troubleshooting for Outdoor Unit
2/3MXL(H) 4MXL(H)
240 460
1 1
205