Mitsubishi Electric MSZ-A09NA Service Manual page 26

OPERATING PROCEDURE
2. Removing the electronic control P.C. board, the
power monitor receiver P.C. board, SW P.C. board
and the terminal block
(1) Remove the horizontal vane, the panel (Refer to 1.) and
the corner box.
(2) Remove the screw of the conduit cover, and conduit cover.
(See Photo 2.)
(3) Remove the indoor/outdoor connecting wire.
(4) Remove the switch holder from the electrical cover.
(See Photo 3.)
(5) Remove the screw of the electrical cover, and then the
electrical cover. (See Photo 3.)
(6) Remove the ground wire connected to the indoor
electronic control P.C. board from the electrical box.
(See Photo 4.)
(7) Unhook the power monitor receiver P.C. board holder from
the catch. (See Photo 3.)
(8) Open the rear cover of the power monitor receiver P.C.
board holder and pull out the power monitor receiver P.C.
board.
(9) Open the switch holder and pull out SW P.C. board.
(10) Pull the electronic control P.C. board slightly toward you
from the electrical box, and disconnect TAB3 and all the
connectors on the electronic control P.C. board.
(LD101 and LD105 are direct-mounted to the electronic
control P.C. board.)
(11) Pull out the electronic control P.C. board from the electrical
box.
(12) Remove the ground wire connected to the heat exchanger
from the electrical box. (See Photo 4.)
(13) Unhook the catches of the electrical box, and pull out the
electrical box.
(14) Remove the screw of the terminal block cover, and then
remove the terminal block cover and the terminal block
holder. (See Photo 5)
(15) Remove the terminal block by sliding it.
3. Removing the electrical box
(1) Remove the horizontal vane, the panel (Refer to 1.) and
the corner box.
(2) Remove the screw of Conduit cover, and then the indoor/
outdoor connecting wire. (See Photo 2.)
(3) Remove the switch holder and the electrical cover.
(See Photo 3.)
(4) Remove the ground wire connected to the heat exchanger
from the electrical box. (See Photo 4.)
(5) Disconnect the following connectors on the electronic
control P.C. board; the fan motor connector <CN211>, the
indoor coil thermistor connector <CN112>, the vane motor
connector <CN151>.
(6) Unhook the catches of the electrical box, and pull out the
electrical box.
Photo 3
Photo 4
Photo 5
Screw
26
PHOTOS
Switch holder
Screw of the
electrical cover.
Power monitor
receiver
P.C. board holder
Ground wire
Indoor fan motor
connector (CN211)
Indoor coil thermistor
connector (CN112)
Vane motor
connector (CN151)