Daikin VRV III-S RXYMQ36 48PVJU Service Manual page 151

Troubleshooting by Indication on the Remote Controller
Troubleshooting
Caution
Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged
Turn power supply off, and turn power
supply on again.
Return to normal?
NO
Check the electronic expansion valve corresponding to the malfunction code "
(Refer to P.105, 106 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 subcooling (Y3E)
Explanation of " "
The
connector of
outdoor unit PCB (A1P)
for electronic expansion
valve is connected.
YES
The coil
resistance of electronic
expansion valve is normal.
(*1)
YES
∗ Make measurement of resistance between the connector pins, and then make sure the resistance falls in the
range of 40 to 50Ω.
142
YES
Master unit
Slave unit 1
Slave unit 2
System
NO
NO
(Orange) 1
(Red) 2
(Yellow) 3
(Black) 4
5
COM[+] (Gray) 6
E9
" in the monitor mode.
Replace the outdoor unit PCB
(A1P).
Measuring points Judgement criteria
1 - 6
2 - 6
40~50Ω
3 - 6
4 - 6
SiUS34-907
External factor other than
malfunction (noise, for example).
Ensure correct connection.
Replace the connecting cable.
Troubleshooting