Noise - Mitsubishi Electric PUHZ-W50VHA Service Manual

OPERATING PROCEDURE
4. Disassembling the electrical parts box
(PUHZ-HW112/140YHA)
(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 2 screws, screw 6 and 7, that fix the plate
equipped with the noise filter circuit board and converter
circuit board. (See Photo 10.)
Note: When reassembling the electrical parts box, make
sure the wirings are correct.
Photo 7
Screw2
Heatsink
Photo 9
Noise filter
circuit board
(N.F.)
Bottom plate of
electrical parts
box
Screw3
Electrical parts
box
B
Converter
circuit board
(CONV.B.)
Power circuit
board (P.B.)
PHOTOS & ILLUSTRATION
Photo 6
Photo 8
Screw4
Bottom plate of electrical parts box
Photo 10
Electrical parts box
Screw6
Noise filter circuit board (N.F.)
66
Electrical
parts box
Screw1
Controller
circuit board
(C.B.)
A
Clamp
Screw5
Screw7