Coil Abnormality; Electronic Expansion Valve Coil Abnormality - Daikin VRV-WIII RWEYQ72PTJU Service Manual

Troubleshooting by Indication on the Remote Controller

Electronic Expansion Valve Coil Abnormality

A9
Error Code
Applicable Indoor units except FXFQ models
Models
Method of Error
Check coil condition of electronic expansion valve by using micro-computer.
Detection
Error Decision
Pin input for electronic expansion valve coil is abnormal when initializing micro-computer.
Conditions
 Defective of electronic expansion valve coil
Supposed
 Defective PCB indoor unit
Causes
 Defective relay cables
Troubleshooting
168
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
Electronic
expansion valve is
connected to X7A of
indoor unit
PCB.
YES
Coil
check of
electronic expansion
valve drive indicates
normal.
CHECK 9
YES
Relay
cables short
circuit or
disconnected.
NO
CHECK 9 Refer to P.249.
NO
NO
YES
SiUS30-1301
Shut the power supply OFF
after connection and then
restart.
Replace the electronic
expansion valve coil.
Replace the relay cables.
When restarting the operation
after shutting the power supply
OFF does not work, replace the
indoor unit PCB.
Service Diagnosis