Daikin RQYQ140-180PY1, Service Manual, Page: 131 / 231

SiBE341001 Troubleshooting by Remote Controller
Troubleshooting 122
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Turn power supply off, and
turn power supply on again.
Return to normal?
YES
External factor other than
malfunction (for example, noise
etc.).
Check the electronic expansion valve corresponding to the malfunction code “
E9
” in the monitor
mode.
(Refer to P.106~P.107 for how to check.)
{
When Confirmation of malfunction 4 shows as follows:
→
Electronic expansion valve for main use (Y1E)
{
When Confirmation of malfunction 4 shows as follows:
→
Electronic expansion valve for refrigerant charge (Y2E)
{
When Confirmation of malfunction 4 shows as follows:
→
Electronic expansion valve for subcooling (Y3E)
{
Explanation of “ ”
Master unit
Slave unit 1
Slave unit 2
System
The connector of
outdoor unit PCB
(A1P) for electronic
expansion valve is
connected.
The coil resistance of
electronic expansion
valve is normal.
(Refer to
∗
1)
NO
Ensure correct connection.
NO
NO
YES
YES
Replace the electronic
expansion valve coil.
Replace the outdoor unit PCB
(A1P).
∗
Make measurement of resistance between the connector pins, and then make sure the resistance
falls in the range of 40 to 50
Ω
.
(Orange) 1
(Red) 2
(Yellow) 3
(Black) 4
5
COM[+] (Gray) 6
Measuring points
1 - 6
2 - 6
3 - 6
4 - 6
Judgement criteria
40~50
Ω