SiUS281117
Troubleshooting by Remote Controller
138
Service Diagnosis
2.27 Electronic Expansion Valve Coil Abnormality
Remote
Controller
Display
E9
Applicable
Models
RZR, RZQ
Method of Error
Detection
Detect errors based on check of continuity of the electronic expansion valve.
Detect errors by suction pipe superheated degree, discharge pipe superheated degree and
electronic expansion valve opening degree.
Error Decision
Conditions
No common power supply when the power is turned ON
When the following conditions are established
Suction pipe superheated degree
39.2°F
Discharge pipe superheated degree
41°F
Electronic expansion valve opening degree
Minimum opening degree
Supposed
Causes
Defective electronic expansion valve
Disconnection of electronic expansion valve harness
Defective connection of electronic expansion valve connector
Defective each thermistor
Defective of each thermistor mounting
Defective pressure sensor
Defective outdoor unit control PCB
Wet operation
