Daikin RZQG71L9V1, Service Manual, Page: 161 / 215

ESIE15-13C Troubleshooting by Remote Controller
Service Diagnosis 147
4.18 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