Disassembly Procedure; Operating Procedure - Mitsubishi Electric PUHZ-W50VHA-BS Service Manual

10

DISASSEMBLY PROCEDURE

PUHZ-W50VHA(-BS)
PUHZ-W85VHA(-BS)

OPERATING PROCEDURE

1. Removing the service panel and top panel
(1) Remove 3 screws (5
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)
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Remove 5 screws (5
(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
(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 (
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
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. surface> (TH33, except W85VHA(-BS))
• Thermistor <Comp. surface> (TH34, HW
• 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
box by pulling it upward. The electrical parts box is fixed
with 2 hooks on the left and 1 hook on the right.
OCH439H
PUHZ-W50VHAR1(-BS)
PUHZ-W85VHAR1(-BS)
12) and slide the hook on the right
×
12) of the top
×
12) to detach the fan grille.
×
25) to detach the fan motor.
×
2), thermistor<Liquid pipe>,
×
8) from the valve bed to remove
×
HA2R3(-BS))
•
10) and detach the electrical parts
×
PUHZ-W50VHAR2(-BS)
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.)
82
PHOTO: PUHZ-W85VHA
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 × 10)