Service manual

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(V2815)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
The
transmission
wiring between
the outdoor unit
PC board, fan
drive 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 P.C.B is
blinking.
The voltage
between red and
white of X1A on
the inverter unit is
220 ~ 240 V.
YES
Defect of outdoor main PC board
or defect of inverter PC board.
Check the noise filter (Z1F) for
disconnection, and check the
power supply wiring or the inverter
PC board.
Replace inverter PC board.
When the LC malfunction occur
again, replace control PC board.
YES
The microcomputer
monitor (green) on fan
drive board is blinking.
NO
Check connection of the connector.
NO
NO
YES
NO
Are the connectors
between the main PC
board (A1P), fan drive
PC board (A3P) and
inverter PC board
(A2P) connected
securely?