Daikin FTX25JVEA9 Service Manual page 254

Si18-201
Troubleshooting
Service Diagnosis
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Check the supply voltage.
Does the power
supply have the rated
voltage?
YES
Check the varistor of the
indoor unit PCB.
Is it damaged?
NO
Check the fuse of the indoor
unit PCB.
Is there conductivity?
YES
Check the thermal fuse of the
terminal board.
Is there conductivity?
YES
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Troubleshooting - Split Type Indoor Unit
NO
YES
NO
NO
Check the connection wire
contact at the terminal board.
Is the connection proper?
YES
Check the power supply, and
correct it if not proper.
Replace the varistor.
Replace the fuse.
NO
Replace the thermal fuse of
the terminal board.
Replace the terminal board
and thermal fuse.
(MF007)
241