Daikin Super Multi Plus D-Series Service Manual page 324

SiEBE18-526
Troubleshooting
Troubleshooting
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Are the
connectors
between the main
NO
PC board (A1P) and
inverter PCB
(A2P) connected
securely?
YES
The
transmission
wiring between the
YES
outdoor unit PCB
inverter unit is
disconnected.
NO
The
microcomputer
YES
monitor (green) on
the inverter PCB
is blinking.
NO
The voltage
between red and
YES
white of X1A on the inverter
unit is the power supply
voltage.
NO
Troubleshooting for Outdoor Unit
Connect transmission wiring and
turn on again.
Fix the disconnection and turn on
again.
Defect of outdoor main PCB or
defect of inverter PCB.
Replace inverter PCB.
When the LC malfunction occur
again, replace control PCB.
Check the noise filter (Z1F) for
disconnection, and check the
power supply wiring or the inverter
PCB.
(Q0439)
313