Noise - Mitsubishi Electric PUHZ-W50VHA Service Manual

PUHZ-HW112YHA(-BS)
OPERATING PROCEDURE
1. Removing the service panel and top panel
(1) Remove 3 service panel fixing screws (5
the hook on the right downward to remove the service
panel.
(2) Remove screws (3 for front, 3 for rear/5
panel and remove it.
2. Removing the fan motor (MF1, MF2)
(1) Remove the service panel. (See Photo 1.)
(2) Remove the top panel. (See Photo 1.)
(3) Remove 5 fan grille fixing screws (5
fan grille. (See Photo 1.)
(4) Remove a nut (for right handed screw of M6) to detach
the propeller. (See Photo 2.)
(5) Disconnect the connectors, CNF1 and CNF2 on controller
circuit board in electrical parts box.
(6) Remove 4 fan motor fixing screws (5
fan motor. (See Photo 3.)
3. Removing the electrical parts box
(1) Remove the service panel. (See Photo 1.)
(2) Remove the top panel. (See Photo 1.)
(3) Disconnect the indoor/outdoor connecting wire and power
supply wire from terminal block.
(4) Disconnect the connectors on the controller circuit board.
(5) Remove the terminal cover and disconnect the
compressor lead wire.
(6) Remove 2 electrical parts box fixing screw (4
detach the electrical parts box by pulling it upward. The
electrical parts box is fixed with 2 hooks on the left and 1
hook on the right.
Photo 5 (PUHZ-HW140VHA)
Controller circuit board
Terminal block (TB1)
PUHZ-HW140YHA(-BS)
10) and slide
10) of the top
10) to detach the
25) to detach the
10) and
Hook (right)
Electrical parts box fixing screw
65
PUHZ-HW140VHA(-BS)
PHOTOS & ILLUSTRATION
Photo 1
Top panel fixing screws
Grille
fixing
screws
Grille
fixing
screws
Photo 2
Front panel
Propeller
Nut
Photo 4 (PUHZ-HW112/140YHA)
Controller circuit
Noise filter circuit
board (C.B.)
board (N.F.)
Terminal
Terminal
block (TB1)
block (TB2)
Top panel
Service panel
Slide
Fan grille
Service panel
fixing screws
Photo 3
Fan
Fan motor fixing screws
motor
Fan motor fixing screws
Electrical parts box
Electrical
parts box
fixing
screw