Troubleshooting (Inverter) Si33-105
200 Troubleshooting R407C PLUS Series Heat Recovery System
Troubleshooting
(V2736)
The
transmission
wiring between the
outdoor unit PC board,
sub board and inverter unit
is disconnected.
YES
Fix the disconnection and turn on
again.
Connect transmission wiring and
turn on again.
NO
YES
The
microcomputer
monitor (green) on the
inverter unit is
blinking.
The
voltage
between red and white
of CN on the inverter
unit is 220 ~ 240 V
(50Hz)
Defect of outdoor PC board or
defect of inverter unit
Check the noise filter (Z1F) for
disconnection, and check the
power supply wiring or the inverter
unit.
Replace inverter PC board.
When the LC malfunction occur
again, replace control PC board.
YES
YES
Is the
outdoor unit
P.C.BOARD
replaced?
Confirm the horse power setting
on outdoor unit PC board was
done and reset power.
YES
The
microcomputer
monitor (green) on sub board
is blinking.
NO
NO
Check the sub board power and
the connector tightness.
NO
NO
YES
NO
Are X3A,
X16A, X17A on
the outdoor unit PC
board, sub board on the
inverter unit
connected
securely.
YES
Fix the power supply.
NO
Are the
power supply
voltage between each
phase right?
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
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