Daikin VRV III RXYQ5-54PY1 Service Manual page 252

Si34-601A
Troubleshooting
Power OFF
Power ON
Troubleshooting
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Is the stop valve open?
YES
Check the compressor cable
for disconnection and flaws.
The compressor cable
has a defect.
NO
Are wire
connections made to
phases U, V, and W in the
proper order and
manner?
NO
Are wire
connections properly
made (according to the
Wiring Diagram)?
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
Check the compressor motor
coil for any broken wire.
NO
Some phase has a
broken wire.
NO
Restart the
compressor, and then
check whetehr or not
the malfunction
recurs.
YES
Has the
compressor started
up at high differential
pressure (not less
than 0.5MPa)?
NO
Troubleshooting by Indication on the Remote Controller
NO
YES
NO
NO
Are the wire connections
mixed up with those for
non-inverter compressor?
YES
YES
NO
YES
On-site causes.
Open the stop valve.
Repalce the cable, and
then securely connect
the connectors.
Make wire connections
without a mistake.
W
U
V
Make wire connections
without a mistake.
Replace the
compressor.
End of work
Faulty pressure
equalization or else
may have occurred.
Check the refrigerant
system.
Faulty pressure
equalization:
Check the refrigerant
system.
Replace the
compressor.
• Conduct checks and
diagnosis of the
compressor.
241