Daikin VRV S RXMQ10ARY1, Service Manual

Page: 254 / 377

Troubleshooting by Error Code SiAF332111E
248 Part 6 Service Diagnosis
Note(s)
Reference
5.30 Electronic Expansion Valve Coil Abnormality
Applicable
Models
RXMQ6-12AR
Error Code
E9
Method of Error
Detection
Detect according to whether or not there is continuity across the electronic expansion valve
coils (Y1E, Y2E, Y4E).
Error Decision
Conditions
When no current flows through common (COM+) at the time of turning ON the power supply.
Supposed
Causes
 Disconnection of connectors from electronic expansion valves (Y1E, Y2E, Y4E)
 Defective electronic expansion valve coil
 Defective outdoor unit main PCB
Troubleshooting

1. RXMQ6/8AR: E9-03 (Y2E), E9-26 (Y4E)
RXMQ10/12AR: E9-01 (Y1E), E9-04 (Y2E)
CHECK 18 Refer to page 358.
Turn OFF the power supply
once, and then turn it ON again.
Return to normal?
Investigate external causes other than
failures (e.g. noise).
Replace the outdoor unit main PCB
(A1P).
YES
NO
Connector for
the electronic expansion
valve of the outdoor unit main
PCB (A1P) is
connected.
CHECK 18
The resistance of
the electronic expansion
valve coil is
normal.
Properly and securely connect the
connector.
NO
YES
Is sub code one of
the following?
E9-48, 54
Replace the defective electronic
expansion valve coil.
YES NO
NO YES
CHECK 18
The resistance of the
electronic expansion
valve coil is
normal.
Replace the electronic expansion
valve coil.
NO
Replace the outdoor unit main PCB
(A1P).
YES
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Check for electronic
expansion valves applicable
to the error code
E9 while in
monitor mode ( 1).
RXMQ6/8AR Only