Specifications

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Troubleshooting 147
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Correct power supply.
NO
Is
the voltage of
power supply
208~230 V?
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
(V3186)
NO
YES
YES
YES
Replace the inverter PC
board.
Does
the voltage
between terminals P
and N gradually rise to
283VDC after
turning
on?
The
voltage
between the P and N
terminals is 190VDC
or more whenthe
compressor is
running.
NO
Is the
power supply voltage
at the connector X1A of
outdoor PC board
side?
Is the
power supply voltage
applied at LB and NB
on the noise filter
PC board?
Monitor field power
supply.
Check the transmission
wiring between the
outdoor unit PC board
and inverter unit.
NO
Replace the inverter PC
board.
YES
NO
Replace the inverter PC
board.
Turn on again.
YES