Disassembly Procedure - Mitsubishi Electric PUHZ-W112VHA Service Manual

9

DISASSEMBLY PROCEDURE

PUHZ-W112VHA
PUHZ-W112VHA-BS
PUHZ-W112VHAR1
PUHZ-W112VHAR1-BS
OPERATING PROCEDURE
1. Removing the service panel and top panel
(1) Remove 3 service panel fixing 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.
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, 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 × 12) to detach the
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 control-
ler circuit board in electrical parts box.
(6) Loosen the clamp for the lead wire on motor support and
separator.
(7) Remove 4 fan motor fixing screws (5 × 20) to detach the
fan motor. (See Photo 3)
Note: When attaching the fan motor, make sure to route the
cable through the hook below the fan motor and fix
firmly with the clamp. (R1, R2 and R3 model only)
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 of CNF1, CNF2, LEV-A and
LEV-B on the controller circuit board.
<Symbols on the board>
• CNF1, CNF2 : Fan motor
• LEV-A, LEV-B : LEV-A, LEV-B
Release the lead wires of LEV from a wire clip.
Disconnect the pipe-side connections of the following parts.
• Thermistor<Liquid>(TH3)
• Thermistor<Discharge>(TH4)
• Thermistor<Plate HEX liquid>(TH6)
• Thermistor<Ambient>(TH7)
• Thermistor<Inlet water>(TH32)
• Thermistor<Suction>(TH33)
• Thermistor<Comp. surface>(TH34)
• High pressure switch(63H)
• Low pressure switch(63L)
• High pressure sensor(63HS)
• 4-way valve coil(21S4)
(5) Remove the terminal cover and disconnect the compres-
sor lead wire.
(6) Remove the sensor holder from the rear guard on back
of the unit.
(7) Remove 2 electrical parts box fixing 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.
OCH562D
PUHZ-W112VHAR2
PUHZ-W112VHAR2-BS
PUHZ-W112VHAR3
PUHZ-W112VHAR3-BS
Photo 1
Photo 2
Nut
Photo 4
52
: Indicates the visible parts in the photos/fi gures.
PHOTOS/FIGURES
Top panel fi xing screws Top panel fi xing screws Top panel fi xing screws Top panel fi xing screws
Grille fi xing
screws
Grille fi xing
screws
Fan grille
Front panel
Propeller Propeller
Fan motor
(MF1)
Fan motor
fi xing screws
Controller circuit board
Terminal block (TB1)
Top panel Top panel
Service panel
Slide
Service panel
fi xing screws
Cover panel
(front)
Photo 3
Fan motor fi xing Fan motor fi xing Fan motor fi xing Fan motor fi xing
Clamps Clamps Clamps
screws
Hook Hook Fan motor
fi xing screws
Hook (right)
Electrical parts
box fi xing screws
Wire clip