Electronic Expansion Valve Abnormality - Daikin SkyAir GQI-Eco Series Service Manual

Troubleshooting by Remote Controller

4.17 Electronic Expansion Valve Abnormality

E9
Remote
Controller
Display
Applicable RZQG
Models
Method of Error
Detection
Error Decision
Conditions
Supposed
Causes
128
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.
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
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
SiBE281013
Service Diagnosis