Electronic Expansion Valve Coil Abnormality - Daikin SkyAir RZR-P Series Service Manual

SiUS281117

2.27 Electronic Expansion Valve Coil Abnormality

E9
Remote
Controller
Display
Applicable RZR, RZQ
Models
Method of Error
Detect errors based on check of continuity of the electronic expansion valve.
Detection Detect errors by suction pipe superheated degree, discharge pipe superheated degree and
electronic expansion valve opening degree.
 No common power supply when the power is turned ON
Error Decision
 When the following conditions are established
Conditions
 Defective electronic expansion valve
Supposed
 Disconnection of electronic expansion valve harness
Causes
 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
138
Suction pipe superheated degree  39.2°F
Discharge pipe superheated degree  41°F
Electronic expansion valve opening degree  Minimum opening degree
Troubleshooting by Remote Controller
Service Diagnosis