Daikin CMSQ200A7W1B Service Manual page 189

Troubleshooting by Indication on the Remote Controller
Troubleshooting
Power OFF
Power ON
Power OFF
Power ON
178
A
The insulation
resistance is low (i.e.,
not more than
100kΩ.)
NO
Check the compressor motor
coil for any broken wire.
Some phase has a
broken wire.
NO
Check the power transistor on
the inverter PC board using a
multiple tester. [For details,
refer to information in the
"Check for power transistor"
on Page 258.
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 PC board.
Restart the
compressor, and then
check whether or not
the malfunction
recurs.
YES
YES
YES
YES
NO
NO
SiBE28-805
Repalce the compressor.
A3P: Replace the inverter
PC board.
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.
Troubleshooting