Electronic Expansion Valve Coil Abnormality - Daikin Aurora Series Service Manual

Troubleshooting by Error Code

2.34 Electronic Expansion Valve Coil Abnormality

E9
Error Code
Applicable
All outdoor unit models
Models
Method of Error
Detect according to whether or not there is continuity across the electronic expansion valve coils
(Y1E-Y7E).
Detection
Error Decision
When no current flows through common (COM[+]) at the time of turning ON the power supply.
Conditions
Supposed
Causes
Troubleshooting
CHECK 18
219
Disconnection of connectors from electronic expansion valves (Y1E-Y7E)
Defective electronic expansion valve coil
Defective outdoor unit main PCB
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
E09-01/05/08: Y1E (master / slave 1 / slave 2)
E09-03/06/09: Y2E (master / slave 1 / slave 2)
E09-04/07/10: Y3E (master / slave 1 / slave 2)
E09-26/27/28: Y4E (master / slave 1 / slave 2)
E09-29/34/39: Y5E (master / slave 1 / slave 2)
E09-31/36/41: Y6E (master / slave 1 / slave 2)
E09-32/37/42: 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
Refer to page 300.
YES
NO
NO
SiUS341802E
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).
Service Diagnosis