Daikin RXYQ-TA Series Service Manual page 240

Troubleshooting by Error Code
Troubleshooting
∗1. Make measurement of resistance between individual pins to ensure that it falls within the range
Note:
227
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
Y1E: E9-04 (Master), E9-07 (Slave 1), E9-10 (Slave 2)
Y2E: E9-01 (Master), E9-05 (Slave 1), E9-08 (Slave 2)
Connector for
the electronic
expansion valve of the outdoor
unit PCB (A1P) is
connected.
YES
The
resistance of
the electronic
expansion valve coil is
normal. (∗1)
YES
of 40 to 50 Ω.
(White)
(Yellow)
(Orange)
YES
NO
NO
1
2
Measurement
3 Point
1 – 6
(Blue)
4
2 – 6
3 – 6
5
4 – 6
(Red)
6
SiUS341615E
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).
Acceptance
Criteria
40 ~ 50 Ω
Service Diagnosis