Daikin VRV II-Q RQYQ8-48PY1B Service Manual page 127

SiBE341027
Troubleshooting
Note:
*1. Make measurement of resistance between the connector pins, and then make sure the
Service Diagnosis
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Turn OFF the power supply once
and then turn it ON again.
Return to normal?
Check the electronic expansion valve corresponding to the error code "
When confirmation of error 3 and 4 shows as follows:
When confirmation of error 3 and 4 shows as follows:
When confirmation of error 3 and 4 shows as follows:
Explanation of " "
The connector of
outdoor unit PCB
(A1P) for electronic
expansion valve is
connected.
The coil resistance of
electronic expansion
valve is normal.
(*1)
resistance falls in the range of 40 to 50W.
(Orange) 1
(Red) 2
(Yellow) 3
(Black) 4
5
COM[+] (Gray) 6
YES
NO
→ Electronic expansion valve for main (Y1E)
→ Electronic expansion valve for refrigerant charge (Y2E)
→ Electronic expansion valve for subcooling (Y3E)
Master unit
Slave unit 1
Slave unit 2
System
NO
YES
NO
YES
Measuring points
Judgement criteria
1 - 6
2 - 6
3 - 6
4 - 6
Troubleshooting by Remote Controller
External factor other than error
(for example, noise etc.).
E9
" in the monitor mode.
Ensure the correct connection.
Replace the electronic
expansion valve coil.
Replace the outdoor unit PCB
(A1P).
40~50 Ω
117