Disassembling The Electrical Parts Box - Mitsubishi Electric PUHZ-HRP71VHA Service Manual

OPERATING PROCEDURE

4. Disassembling the electrical parts box

(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 1)
(3) Disconnect the indoor/outdoor connecting wire and power
supply wire from the terminal block.
(4) Disconnect all the connectors on the controller circuit
board.
(5) Disconnect the lead wires from 3 clamps on the separator.
(6) 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 4 and 5)
(7) Slide the plate in the direction of the arrow A and remove it.
(See Photo 4)
(8) Remove the lead wires from the clamp on the bottom of the
electrical parts box. (See Photo 6)
(9) 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
6 and 7)
(10) Remove the 2 screws, screw 6 and 7, that fix the plate
equipped with the noise filter circuit board and converter
circuit board. (See Photo 8)
Note: When reassembling the electrical parts box, make
sure the wirings are correct.
Photo 5
Screw2
Heatsink
Photo 7
Noise filter
circuit board
(N.F.)
OCH425F
Bottom plate of
electrical parts
box
Screw3
Electrical parts
box
B
Converter
circuit board
(CONV.B.)
Power circuit
board (P.B.)
PHOTOS & ILLUSTRATION
Photo 4
Photo 6
Screw4
Bottom plate of electrical parts box
Photo 8
Electrical parts box
Screw 6
Noise filter circuit board (N.F.)
128
Electrical
parts box
Screw1
Controller
circuit board
(C.B.)
A
Clamp
Screw5
Screw 7