Mitsubishi Electric MSZ-HR25VFK-ER1 Service Manual page 43

OPERATING PROCEDURE
2. Removing the indoor terminal P.C. board, indoor
electronic control P.C. board, and power monitor
receiver SW P.C. board and the electrical box
<Removing the electrical box>
(1) Remove the panel. (Refer to section 1.)
Remove the corner box right .
(2) Remove the screw of the V.A. clamp.
Remove the V.A. clamp and the indoor/outdoor connect-
ing wire.
(3) Remove the screws of the electrical cover and electrical
cover.
(4) Remove the connector of the coil thermistor from the
indoor electronic control P.C. board.
Remove the wires of the indoor coil thermistors from the
water cover, and remove the tab of the earth wire.
(5) Remove the water cover.
(6) Remove the following connectors from the indoor elec-
tronic control P.C. board:
CN151 (Vane motor)
CN211 (Fan motor)
(7) Remove the upper catch of the electrical box, and pull out
the electrical box.
NOTE:
To attach the electrical box, pass the wires connecting the
indoor power monitor receiver SW P.C. board and the
indoor electronic control P.C. board through A. Pass the
lead wires of the fan motor through B as shown in the
Photo 3.
<Removing the indoor terminal P.C. board, indoor elec-
tronic control P.C. board, and power monitor receiver
SW P.C. board>
(8) Remove the screw of the terminal block and remove the
earth wire connected to the electrical box from the
indoor electronic control P.C. board.
(9) Remove the display P.C. board holder from the electri-
cal box.
(10) Unhook the hooks of the the display P.C. board holder
(Photo 4) and remove the power monitor receiver SW
P.C. board.
(11) Remove the room temperature thermistor from the elec-
trical box .
Remove the indoor terminal P.C. board and the indoor
electronic control P.C board from the electrical box.
*1: Remove the insulations when replace the indoor elec-
tric control P.C. board.
Photo 4
Display
P.C.
board
holder
OBH822F
Photo 2
Water cover
Photo 3
Screw of the
terminal block
2 hooks
A
43
PHOTOS/FIGURES
Tab of the
earth wire
Display P.C. board
holder
Earth wire connected
to the electrical box
Indoor coil thermistor
connector (CN112)
Wires of indoor
coil thermistor
Screw of the
electrical cover
Screw of the
V.A. clamp
Electrical box
Indoor electronic
control P.C. board
Indoor fan motor
connector CN211
Vane motor
connector CN151
Room tempera-
ture thermistor
connector CN111
Insulations*1
B