Disassembly Procedure - Mitsubishi Electric PUHZ-W50VHA2R1 Service Manual

9

DISASSEMBLY PROCEDURE

PUHZ-W50VHA2
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.
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 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 (WH) on controller circuit
board in electrical parts box. (See Photo 4)
(6) Loosen the clamp for the lead wire on motor support and
separator. (See Photo 4)
(7) Release the lead wire from the hole on separator.
(See Photo 4)
(8) 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;
CNF1 (WH). LEV-A (WH), LEV-B (RD), TH3 (WH). TH4 (WH), TH7/6
(RD), TH32 (BK), TH34 (RD), 63HS (WH), 63H (YE) and 21S4 (GN).
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> (TH3)
• Thermistor <Discharge> (TH4)
• Thermistor <Ambient/Plate HEX Liquid> (TH7/6)
• Thermistor <Inlet Water> (TH32)
• Thermistor <Comp. Surface> (TH34)
• High Pressure Sensor (63HS)
• High Pressure Switch (63H)
• Solenoid Valve Coil <4-way valve> (21S4)
(5) Loosen the clamps, fasteners and cable strap for the lead
wire in the electrical parts box and separator.
(6) Loosen the lead wire fixed to the pipes with bands.
(7) Remove the damper top.
(8) Remove the flange nut and terminal cover, then disconnect
the compressor lead wires.
(9) Remove 2 screws (4
box by pulling it upward. The electrical parts box is fixed
with 2 hooks on the left and 1 hook on the right.
OCH605A
PUHZ-W50VHA2-BS
12) and slide the hook on the right
×
12) of the top
×
12) to detach the fan grille.
×
20) to detach the fan motor.
×
10) and detach the electrical parts
×
Top panel fixing screws
Photo 1
Fan grille
Photo 2
Front panel
Propeller
Nut
Front panel fixing screws
Photo 4
Motor support
Clamps
Terminal
Valve bed
block
fixing screw
(4 × 8)
47
PHOTOS
Slide
Cover panel
front fixing screws
Grille fixing screws
Photo 3
Fan motor fixing screws
Fan
motor
Fan motor
(MF1)
fixing screws
Separator
Controller circuit board (C.B.)
Electrical parts box
Side panel (R)
Terminal cover Damper top
Valve bed
Top panel
Service panel
Service panel
fixing screws
Cover panel
(front)
Clamp
Electrical
parts box
fixing screws
(4 × 10)
Valve bed
fixing screws
(4 × 8)