Electronic Expansion Valve Abnormality - Daikin ZQG71~140L7V1B Service Manual

Troubleshooting by Remote Controller

4.17 Electronic Expansion Valve Abnormality

E9
Remote
Controller
Display
Applicable
RZQG
Models
Method of Error
 The error is detected whether the continuity of electronic expansion valve exist or not.
Detection  The error is detected by the suction pipe superheat degree, discharge pipe superheat
Error Decision  No common power supply when the power is ON.
Conditions  When the following conditions are met
Supposed
 Defective electronic expansion valve
Causes  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
156
degree and electronic expansion valve opening degree.
 Suction pipe superheat degree < 4°C
 Minimum electronic expansion valve opening degree
 Discharge pipe superheat degree < 5°C
ESIE12-06
Service Diagnosis