Mitsubishi Electric PUHZ-W50VHA-BS Service Manual page 90

OPERATING PROCEDURE
4. Disassembling the electrical parts box
(PUHZ-HW112/140Y)
(1) Disconnect all the connectors on the controller circuit
board.
(2) Remove the 3 screws, screw 1, 2 and 3, that fix the
plate equipped with the outdoor controller circuit board,
and the electrical parts box, screw 1 from the front and
the screw 2 and 3 from the bottom of the electrical parts
box. (See Photo 6 and 7)
(3) Slide the plate in the direction of the arrow A and remove it.
(See Photo 6.)
(4) Remove the lead wires from the clamp on the bottom of the
electrical parts box. (See Photo 8)
(5) Remove the 3 screws, screw 4 and 5, that fix the bottom
side of the electrical parts box and remove the bottom side
plate by sliding in the direction of the arrow B. (See Photo
8 and 9)
(6) Remove the noise filter circuit board. (See Photo 10)
(7) Remove the screw 6 and 7, and remove the plate that
equips the converter circuit board. (See Photo 10)
(8) Remove the converter circuit board from the plate. (See
Photo 10)
Note: When reassembling the electrical parts box, make
sure the wirings are correct.
Photo 7
Screw 2
Heatsink
Photo 9
Noise filter
circuit board
(N.F.)
OCH439H
Bottom plate of
electrical parts
box
Screw 3
Electrical parts
box
B
Converter
circuit board
(CONV.B.)
Power circuit
board (P.B.)
PHOTOS & ILLUSTRATION
Photo 6
Photo 8
Screw 4
Bottom plate of electrical parts box
Photo 10
Electrical parts box
Screw 6
Noise filter circuit board (N.F.)
90
Electrical
parts box
Screw 1
Controller
circuit board
(C.B.)
A
Clamp
Screw 5
Screw 7