Daikin RXYQ96PYDN Service Manual page 386

SiUS34-801A_b
Troubleshooting
Troubleshooting
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Turn power supply off, and
turn power supply on again.
Return to normal?
Check the electronic expansion valve corresponding to the malfunction code "
mode.
(Refer to P334~335 for how to check.)
When Check 4 shows as follows:
→ Electronic expansion valve for main use (Y1E, Y3E for Single, Y1E for Multi)
When Check 4 shows as follows:
→ Electronic expansion valve for refrigerant charge (Y4E for Single, Y2E for Multi)
When Check 4 shows as follows:
→ Electronic expansion valve for subcooling (Y2E, Y5E for Single, Y3E for Multi)
Explanation of " "
The connector
of outdoor unit PC board
(A1P) for electronic expansion
valve is connected.
The coil
resistance of electronic
expansion valve isnormal.
(Refer to ∗1)
∗ Make measurement of resistance between the connector pins, and then make sure the resistance
falls in the range of 40 to 50Ω.
(Orange) 1
(Red) 2
(Yellow) 3
(Black) 4
5
COM[+] (Gray) 6
Troubleshooting by Indication on the Remote Controller
YES
NO
Master unit
Slave unit 1
Slave unit 2
System
NO
YES
NO
YES
Measuring points Judgment criteria
1 - 6
2 - 6
3 - 6
4 - 6
External factor other than
malfunction (for example, noise
etc.).
E9
" in the monitor
Ensure correct connection.
Replace the connecting cable.
Replace outdoor unit PC board
(A1P).
40~50Ω
(V3067)
(V3067)
371