Daikin VRV III RXYQ5-54PY1 Service Manual page 280

Si34-601A
Troubleshooting
Power ON
Power OFF
Troubleshooting
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Are the fan
transmission wire
connectors (X3A: Black,
X4A: Yellow) wrongly
connected?
YES
Check
whether or not
the power supply voltage
between L2 and N falls in
the range of 220 to
240VAC?
YES
Is the type
(PC No.) of the fan
inverter correct?
YES
Disconnect the cable from the
compressor, and then check
the compressor for the
insulation resistance.
NO
The insulation
resistance is low (i.e., not
more than
100kΩ.)
NO
Disconnect the cable from the
fan, and then check the fan
motor for the insulation
resistance.
NO
The insulation
resistance is low (i.e., not
more than
1MΩ.)
NO
Check for connector connections: Remove and insert the
connectors shown below.
[Fan 1]
• A1P X28A ⇔ X6A A3P
• A1P X20A ⇔ X4A A3P
• A3P X61A ⇔ X402A A2P
• A3P X1A ⇔ X403A A2P
• A3P X5A ⇔ X5A A4P
• A3P X41A ⇔ X3A A4P
• A4P X4A Short connector
F400U of the
A2P has been
molten.
NO
A
Troubleshooting by Indication on the Remote Controller
NO
NO
NO
YES
YES
[Fan 2]
• A4P X51A ⇔ X5A A8P
• A4P X4A ⇔ X3A A8P
• A8P X4A Short connector
Note) X3A: black
X4A: yellow
YES
Replace the noise
filter of the A2P.
Connect the connectors
to the corresponding
color (black or yellow).
On-site cause.
Correct the wiring.
Mount the correct type
of fan inverter.
FAN1 FAN2
RXYQ5P PC0511-3 -
RXYQ8P PC0511-1 -
RXYQ10P PC0511-1 -
RXYQ12P PC0511-3 PC0511-4
RXYQ16P PC0511-3 PC0511-4
RXYQ18P PC0511-1 PC0511-2
Replace the
compressor.
Replace the fan motor.
Replace the fan driver
PC board.
F400U
269