Daikin RXL25G2V1B, Service Manual

Page: 105 / 294

Troubleshooting SiENBE04-925_A
90 Service Diagnosis
4.13 Four Way Valve Abnormality
Remote Control
Display
EA
Method of
Malfunction
Detection The room temperature thermistor, the indoor heat exchanger thermistor, the outdoor
temperature thermistor, and the outdoor heat exchanger thermistor are checked if they function
within their normal ranges in each operation mode.
Malfunction
Decision
Conditions A following condition continues over 1 ~ 10 minutes (depending on the model) after operating
for 5 ~ 10 minutes (depending on the model).
„
Cooling / Dry
(room thermistor temp. – indoor heat exchanger temp.) < –5°C
„
Heating
(indoor heat exchanger temp. – room thermistor temp.) < –5°C
„
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
SIENBE04-925_A_FRONT.pdf 105 24/02/2011 13:53:56