Mitsubishi Electric MSZ-AP71VG-E3 Service Manual page 55

OPERATING PROCEDURE
3. Removing the indoor terminal P.C. board, the
indoor electronic control P.C. board, the display
P.C. board, switch/buzzer P.C. board and the
receiver P.C. board
(1) Remove the panel (Refer to section 1) and the right
corner box.
(2) Remove the cable of the Wi-Fi interface (MSZ-
AP·VGK) from the water cover (Refer to section 2).
(3) Remove the screw of the V.A. clamp.
Remove the V.A. clamp and the indoor/outdoor con-
necting wire.
(4) Remove the screw of the electrical cover, and then
the electrical cover.
(5) Remove the earth wire connected to the indoor elec-
tronic control P.C. board from the electrical box.
(6) Unhook the catch on the left side of the display
and receiver P.C. board holder. Pull the display and
receiver P.C. board holder as if opening the door at
90 degrees.
(7) Open the rear cover of the display and receiver holder
and pull out the display P.C. board, the switch/buzzer
P.C. board and the receiver P.C. board.
(8) Disconnect all the connectors on the indoor electronic
control P.C. board and unhook all lead wires.
(9) Remove the screw of the terminal block on the indoor
terminal P.C. board.
(10) Remove the indoor terminal P.C. board and the indoor
electronic control P.C. board.
4. Removing the indoor electrical box
(1) Remove the panel (Refer to section 1) and the right
corner box.
(2) Remove the cable of the Wi-Fi interface (MSZ-
AP·VGK) from the water cover (Refer to section 2).
(3) Remove the indoor/outdoor connecting wire. (Refer to
section 3)
(4) Remove the earth wire connected to the indoor heat
exchanger from the electrical box.
(5) Remove the screw of the electrical cover and remove
the electrical cover.
(6) Disconnect all the connectors on the indoor electronic
control P.C. board and unhook all lead wires.
(7) Remove the screw fixing the electrical box, then the
upper catch of the electrical box, and pull out the
electrical box.
OBH788E
PHOTOS/FIGURES
Photo 3
Panel (F)
B
Photo 4
Earth wires
55
A
Electrical box
Catch of the
water cover
Screw of the
electrical cover
Cable of the
Wi-Fi interface
Screw of the
V.A. clamp
Display and
receiver holder
Upper catch
Indoor electri-
cal control P.C.
board
Indoor terminal
P.C. board
Screw of the ter-
minal block
Screw of the
electrical box