Mitsubishi Electric MSZ-EF18VGW-E1 Service Manual page 54

OPERATING PROCEDURE
2. Removing the Wi-Fi interface
(1) Remove the panel (Refer to section 1.) and the corner
box right.
(2) Remove the screw of the V.A. clamp.
Remove the V.A. clamp and the indoor/outdoor
connecting wire.
(3) Remove the screw of the electrical cover, and remove
the electrical cover.
(4) Disconnect the following connector (Photo 3):
<Indoor electronic control P.C. board>
CN110 (Wi-Fi interface)
(5) Remove the lead wire of the Wi-Fi interface from the
hook of the cable guide and water cut.
3. Removing the indoor electrical box
(1) Remove the panel (Refer to section 1.) and the corner
box right.
(2) Remove the screw of the V.A. clamp.
Remove the V.A. clamp and the indoor/outdoor
connecting wire.
(3) Remove the earth wire connected to the indoor heat
exchanger from the electrical box.
(4) Remove the screw of the electrical cover and remove
the electrical cover.
(5) Disconnect following connectors:
<Indoor electronic control P.C. board>
CN151 (Vane motor)
CN110 (Wi-Fi interface)
<Indoor power P.C. board>
CN211 (Indoor fan motor)
(6) Remove the lead wire of the Wi-Fi interface, and
remove the Wi-Fi interface (Refer to section 2.).
(7) Remove the screw fixing the electrical box, then
the upper catch of the electrical box, and
pull out the electrical box.
4. Removing the indoor power P.C. board, the
switch board, the display board, the receiver
board and the indoor electronic control P.C.
board
(1) Remove the panel (Refer to Section 1.) and the corner
box right.
(2) Remove the screw of the V.A. clamp. Remove the V.A.
clamp and the indoor/outdoor connecting wire.
(3) Remove the indoor electrical box (Refer to section 3.).
(4) Remove the earth wire connected to the electrical box
from the indoor power P.C. board.
(5) Disconnect the following connectors:
<Indoor electronic power P.C. board>
CN201 (Terminal block)
CN202 (To the indoor electronic control P.C. board)
(6) Remove the indoor power P.C. board.
(7) Disconnect the following connectors:
<Indoor electronic control P.C. board>
CN111 (Room temperature thermistor)
CN112 (Indoor coil thermistor)
(8) Unhook the catches of the display P.C. board holder
from the nozzle and the electrical box (right side).
(9) Open the rear cover of the display P.C. board holder
and remove the switch board, the display board and
the receiver board.
Remove the indoor electronic control P.C. board.
OBH831D
PHOTOS/FIGURES
Photo 2
Wi-Fi interface
Catch of indoor electronic
control P.C. board holder
Photo 3
Earth wire
Wi-Fi interface
Screw of
the terminal block
Wi-Fi interface
connector (CN110)
54
Electrical box
Earth wire
Screw of
the electrical cover
Screw of
the V.A. clamp
Display P.C. board
holder
Upper catch
Indoor power
P.C. board
Indoor electronic
control P.C. board
Screw of
the electrical box
Catch of indoor electronic
control P.C. board holder