Electronic Expansion Valve Coil Abnormality - Daikin REYQ-TA Series Service Manual

SiUS371614E

3.32 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-Y5E).
Detection
Error Decision
When no current flows through common (COM[+]) at the time of turning ON the power supply.
Conditions
Supposed
Causes
Troubleshooting
∗1. Make measurement of resistance between individual pins to ensure that it falls within the range
Note:
Service Diagnosis
Disconnection of connectors from electronic expansion valves
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
E09-03/06/09: Y2E
E09-04/07/10: Y3E
E09-26/27/28: Y4E
E09-29/34/39: Y5E
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.
YES
NO
NO
(White)
1
Measurement
(Yellow)
2
Point
(Orange)
3
1 – 6
(Blue)
4
2 – 6
3 – 6
5
4 – 6
(Red)
6
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).
Acceptance
Criteria
40-50 Ω
218