Troubleshooting by Remote Controller
SiBE281013
128
Service Diagnosis
4.17 Electronic Expansion Valve Abnormality
Remote
Controller
Display
E9
Applicable
Models
RZQG
Method of Error
Detection
The error is detected whether the continuity of electronic expansion valve exist or not.
The error is detected by the suction pipe superheat degree, discharge pipe superheat
degree and electronic expansion valve opening degree.
Error Decision
Conditions
No common power supply when the power is ON.
When the following conditions are met
•
Suction pipe superheat degree < 4°C
•
Minimum electronic expansion valve opening degree
•
Discharge pipe superheat degree < 5°C
Supposed
Causes
Defective electronic expansion valve
Disconnection of electronic expansion valve harness
Defective connection of electronic expansion valve connector
Defective each thermistor and mounting thermistor
Defective pressure sensor
Defective outdoor unit PCB
Abnormal wet operation
