Mitsubishi Electric MSZ-FH12NA Service Manual page 33

OPERATING PROCEDURE
2. Removing the indoor electrical box
(1) Remove the panels (Refer to 1.) and the right corner
box.
(2) Remove the screw of the V.A. clamp and V.A. clamp.
(3) Remove the screw of the electrical cover and the
electrical cover.
(4) Disconnect following connectors:
<Indoor electronic control P.C. board>
CN151 (Vane motor)
<Indoor power P.C. board>
CN211 (Indoor fan motor)
CN110 (DISPLAY AND i-see SENSOR ASSEMBLY)
(5) Remove DISPLAY AND i-see SENSOR ASSEMBLY.
(6) Remove the screw of conduit cover and the conduit
cover.
(7) Remove the screw of conduit plate, the conduit plate
and the indoor/outdoor connecting wire.
(8) Remove the ground wire connected to the indoor heat
exchanger from the electrical box.
(9) Remove the screw fixing the electrical box, then
the upper catch of the electrical box, and
pull out the electrical box.
When installing the electrical box, pass the lead
wire from the fan motor through
(Photo 4) so that it will not be pinched under the
electrical box.
OBH683D
Photo 3
Photo 4
Ground wire
(Photo 10) and
Catch of the DISPLAY AND
i-see SENSOR ASSEMBLY
Photo 5
33
PHOTOS
Ground wire
Electrical box
Screw of
the electrical cover
Screw of
the V.A. clamp
DISPLAY AND i-see
SENSOR ASSEMBLY
Upper catch
Lead wire holder
Indoor power
P.C. board
Indoor electronic
control P.C. board
Screw of
the electrical box
Screw of
the terminal block
Screw of the
conduit plate
Screw of the
conduit cover