Daikin VRV III RXYQ5-54PY1 Service Manual page 274

Si34-601A
Troubleshooting
Power OFF
Power ON
Power OFF
Power ON
Troubleshooting
A
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.
Check the power transistor on
the inverter PC board using a
multiple tester. [For details,
refer to information in the
"Check for power transistor"
in Page 350, 351.
The power
transistor has an
abnormality.
NO
Make wire connections
according to the Wiring Diagram.
Restart the
compressor, and then
check whether or not
the malfunction
recurs.
YES
Replace the inverter PCB.
Restart the
compressor, and then
check whether or not
the malfunction
recurs.
YES
Troubleshooting by Indication on the Remote Controller
YES
YES
YES
NO
NO
Repalce the compressor.
A3P: Replace the inverter
PCB.
Normal
• On-site causes such as
instantaneous power
failure or open phase
• Conduct checks and
diagnosis of the
compressor.
End of work
Replace the compressor.
• Conduct checks and
diagnosis of the
compressor.
263