Disassembly Procedure - Mitsubishi Electric PUHZ-W85VHA2 Service Manual

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9

DISASSEMBLY PROCEDURE

PUHZ-W85VHA2.UK PUHZ-W85VHA2-BS.UK
OPERATING PROCEDURE
1. Removing the service panel and top panel
(1) Remove 3 screws (5 × 10) and slide the hook on the right
downward to remove the service panel.
(2) Remove screws (3 for front, 3 for rear/5 × 10) of the top
panel and remove it.
2. Removing the fan motor (MF1)
(1) Remove the service panel. (See Photo 1.)
(2) Remove the top panel. (See Photo 1.)
(3) Remove 5 screws (5 × 10) 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 connector CNF1 on controller circuit board
in electrical parts box.
(6) Remove 4 screws (5 × 25) to detach the fan motor.
(See Photo 3.)
3. Removing the electrical box
(1) Remove the service panel. (See Photo 1.)
(2) Remove the top panel. (See Photo 1.)
(3) Disconnect the connecting wires from terminal block.
(4) Remove all the following connectors from controller circuit board;
fan motor, linear expansion valve (×2), thermistor<Liquid pipe>,
thermistor <Discharge>, thermistor <Plate HEX Liquid>,
thermistor <Outdoor ambient>, high pressure sensor,
high pressure switch, 4-way valve and bypass valve.
Then remove a screw (4 × 8) from the valve bed to remove
the lead wire.
Pull out the disconnected wire from the electrical parts box.
<Diagram symbol in the connector housing>
• Fan motor (CNF1)
• Linear expansion valve (LEV-A and LEV-B)
• Thermistor <Liquid pipe> (TH3)
• Thermistor <Discharge> (TH4)
• Thermistor <Plate HEX Liquid, Outdoor Ambient> (TH7/6)
• Thermistor <Inlet water> (TH32)
• Thermistor <Comp. shell> (TH33)
• High pressure sensor (63HS)
• High pressure switch (63H)
• Solenoid valve coil <4-way valve> (21S4)
• Solenoid valve coil <Bypass valve> (SV2)
(5) Remove the terminal cover and disconnect the compressor
lead wires.
(6) Remove a screw (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.
PHOTOS & ILLUSTRATION
Top panel fixing screws
Photo 1
Fan grille
Grille fixing screws
Photo 2
Front panel
Propeller
Nut
Front panel fixing screws
Photo 4
Controller circuit board (C.B.)
42
Top panel
Slide
Service panel
Service panel
fixing screws
Photo 3
Fan
motor
Fan motor fixing screws
(MF1)
Fan motor
fixing screws
Electrical parts box
Electrical parts box
fixing screw
(4 x 10)

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