Disassembly Procedure; Removing The Service, Top And Cover Panels; Removing The Fan Motor; Removing The Electrical Parts Box - Mitsubishi Electric PUZ-WM50VHA Service Manual

11

DISASSEMBLY PROCEDURE

PUZ-WM50VHA.UK
OPERATING PROCEDURE

1. Removing the service, top and cover panels

(1) Remove 3 screws (5 × 12) and slide the hook on the
right downward to remove the service panel.
(2) Remove screws (3 for front, 3 for rear/5 × 12) of the top
panel and remove it.
(3) Remove 2 screws (5x12) of the cover panel and
remove it.
Note: When removing service panel and top panel at
the same time, count one less screw since they
share a screw.
2. Removing the fan motor (MF1)
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Remove 4 screws (5 × 12) to detach the fan grill.
(See Photo 1)
(4) Remove a nut (for right handed screw of M6) to detach
the propeller. (See Photo 2)
(5) Disconnect the connector CNF1 on controller circuit
board in electrical parts box.
(6) Loosen the clamp for the lead wire on motor support
and
separator.
(7) Remove 4 screws (5 × 25) to detach the fan motor.
(See Photo 3)
* When attaching the fan motor, make sure to route the
cable through the hook below the fan motor and fix firmly
with the clamp. (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 from
terminal block.
(4) Disconnect the connector CNF1, 63HS, LEV-A and
LEV-B on the controller circuit board.
<Symbols on the board>
• CNF1 : Fan motor
• 63HS: Pressure sensor
• LEV-A, LEV-B : LEV
(5) Disconnect the pipe-side connections of the following
parts.
• Thermistor <Liquid> (TH3)
• Thermistor <Discharge> (TH4)
• Thermistor <Ambient, 2-Phase pipe> (TH7/6)
• Thermistor <Heat sink> (TH8)
• Thermistor <Plate HEX liquid> (TH34)
• Thermistor <Comp. surface> (TH33)
• High pressure switch (63H)
• 4-way valve coil (21S4)
(6) Release the lead wire from the hole on separator.
(7) Remove the terminal cover and disconnect the com-
pressor lead wires.
(8) Remove the 2 screws (4 × 10) and 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.
OCH727
PUZ-WM50VHA-BS.UK
Photo 1
Fan grill
Photo 2
Photo 4
66
PHOTOS/FIGURES
Top panel fixing screws
Slide
Grill fixing screws
Photo 3
Front panel
Fan motor fixing screws
Nut
Propeller
Fan
motor
(MF1)
Hook*
Controller circuit board (C.B.)
Top panel
Service panel
Service panel
fixing screws
Cover panel
Fan
motor
fixing
screws
Electrical parts box
Electrical parts box
fixing screw
(4 x 10)