Electronic Expansion Valve Coil Abnormality, Dust Clogging - Daikin VRV IV-S RXTQ-TAVJU Series Service Manual

SiUS331604E
4.9 Electronic Expansion Valve Coil Abnormality, Dust
Clogging
A9
Error Code
Applicable All indoor units
Models
Method of Error Electronic expansion valve coil conditions are checked via micro-computer.
Detection The electronic expansion valve main body is checked for dust clogging via micro-computer.
Error Decision
Pin input for electronic expansion valve coil is abnormal when initializing micro-computer.
Either of the following conditions is seen/caused/occurs while the unit stops operation.
Conditions
Supposed
Causes
Service Diagnosis
Temperature of suction air (R1T) – temperature of liquid pipe of heat exchanger (R2T) > 8°C
(14.4°F).
Temperature of liquid pipe of heat exchanger (R2T) shows fixed degrees or below.
Defective electronic expansion valve coil
Defective indoor unit main PCB
Defective relay cables
Troubleshooting by Error Code
150