Mitsubishi Electric OBH839 Service Manual page 31

OPERATING PROCEDURE
2. Removing the indoor electronic control P.C.
board, receiver P.C. board, display P.C. board,
and SW P.C. board
(1) Remove the panel (refer to section 1) and the corner
box.
(2) Remove the screw of the V.A. clamp. Remove the V.A.
clamp and the indoor/outdoor connecting wire. (Photo 2)
(3) Remove the screw of the electrical cover, and then
the electrical cover. (Photo 2)
(4) Remove the display holder and SW holder. (Photo 3)
(5) Unhook the catches
holder and remove the receiver P.C. board.
(Photo 5, 6)
(6) Unhook the catches
board. (Photo 6)
(7) Open the SW holder and pull out the SW P.C. board.
(8) Disconnect the following connectors on the electronic
control P.C. board:
CN211 (Indoor fan motor)
CN201 (Terminal block)
CN112 (Indoor coil thermistor)
CN151 (Horizontal vane motor)
CN109 (Receiver P.C. board)
(9) Pull out the electronic control P.C. board from the
electrical box.
(10) Remove the earth wire connected to the indoor elec-
tronic control P.C. board from the electrical box. (Photo 3)
NOTE:
MSZ-AP15VG and MSZ-AP20VG have locking mech-
anism.
OBH838A
, open the cover of the display
and remove the display P.C.
PHOTOS/FIGURES
Photo 2
Photo 3
Earth wire to the
heat exchanger
SW holder
Display holder
Photo 4
Room temperature thermistor (RT11)
Be sure to install this thermistor in the
proper direction.
31
Screw of the
V.A. clamp
Screw of the
electrical
cover
Release this catch to remove the
electronic control P.C. board.
Indoor electronic
control P.C. board
Fixing screw of the
electrical cover
Earth wire to the
indoor electronic
control P.C. board