Electronic Expansion Valve Coil Abnormality - Daikin VRV RXYQ72-384XAYCA Service Manual

SiUS342004EB

3.39 Electronic Expansion Valve Coil Abnormality

Applicable
All outdoor unit models
Models
E9
Error Code
Method of Error
Detects according to whether or not there is continuity across the electronic expansion valve coils.
Detection
Error Decision
When no current flows through common (COM[+]) at the time of turning ON the power supply.
Conditions
Supposed
 Disconnection of connectors from electronic expansion valves
Causes  Defective electronic expansion valve coil
 Defective outdoor unit main PCB
Troubleshooting
Reference
CHECK 18 Refer to page 376.
Part 6 Service Diagnosis
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Turn OFF the power supply
once, and then turn it ON again.
Return to normal?
NO
Check for electronic expansion valves applicable to the error code E9 while in monitor mode.
Sub code
E9-01/05/08: Y1E (Master / Slave 1 / Slave 2)
E9-03/06/09: Y2E (Master / Slave 1 / Slave 2)
E9-04/07/10: Y3E (Master / Slave 1 / Slave 2)
E9-26/27/28: Y4E (Master / Slave 1 / Slave 2)
E9-29/34/39: Y5E (Master / Slave 1 / Slave 2)
E9-32/37/42: Y7E (Master / Slave 1 / Slave 2)
Connector
for the electronic
expansion valve of the outdoor
unit main PCB (A1P) is
connected.
YES
The
resistance of the
electronic expansion
valve coil is normal.
CHECK 18
YES
YES
NO
NO
Troubleshooting by Error Code
Investigate external causes other than
failures (e.g. noise).
Properly and securely connect the
connector.
Replace the electronic expansion
valve.
Replace the outdoor unit main PCB
(A1P).
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