Disassembly Procedure - Mitsubishi Electric PUHZ-W85VAA Service Manual

11

DISASSEMBLY PROCEDURE

PUHZ-W85VAA.UK
OPERATING PROCEDURE
1. Removing the service panel and top panel
(1) Remove the service panel fixing screws (3 for front and 1
for right/ 5 × 12), then slide the service panel downward
to remove it.
(The service panel is fixed to the side panel (R) with a
hook on the right side.)
(2) Remove the top panel fixing screws (3 for front, 3 for rear
and 1 for right/ 5 × 12) to remove the top panel.
Note 1: When removing service panel and top panel at the
same time, count 2 less screws since they share
a screws.
2. Removing the fan motor (MF1)
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Remove the wire grille fixing screws (6 for front/ 5 × 12),
then slide the wire grille upward to remove it. (See Photo 1)
(4) Remove the screw of nut (1 for front/ M6), then slide the
propeller fan forward to remove it.
(5) Disconnect the connector CNF1 (WH) on the controller
circuit board in the electrical parts box. (See Photo 3-1)
(6) Loosen the clamps for the lead wire on motor support and separator.
(7) Loosen the edge cover for the lead wire on separator.
(8) Remove the fan motor fixing screws (4 for front/ 5 × 20)
to remove the fan motor.
Note 1: When attaching the fan motor, make sure to route
the cable through the hook below the fan motor
and fix firmly with the clamp.
Note 2: Tighten the propeller fan with a torque of 5.7 i 0.3 N·m.
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 power supply cable from terminal block.
(4) Disconnect the indoor/outdoor connecting wire from terminal block.
(5) Loosen the cable strap for the lead wire on the comp case (front).
(6) Disconnect the connectors CNF1 (WH), TH3 (WH), TH4
(WH), TH7/6 (RD), TH33 (YE), TH34 (RD), 63H (YE),
63HS (WH), 21S4 (GN), LEV-A (WH) and LEV-B (RD)
from the controller circuit board.
<Symbols on the board>
• Fan motor (CNF1)
• Thermistor <Liquid> (TH3)
• Thermistor <Discharge> (TH4)
• Thermistor <Ambient/ Plate Hex Liquid> (TH7/6)
• Thermistor <Comp. Surface> (TH33)
• Thermistor <Inlet Water> (TH34)
• High pressure switch (63H)
• High pressure sensor (63HS)
• 4-way valve (21S4)
• LEV (LEV-A, LEV-B)
(7) Disconnect the connectors ACL1 (RD), ACL2 (WH) and
ACL3 (BK) on reactors in the separator.*
(8) Remove the cover panel (front) fixing screws (1 for front
and 1 for right/ 5 × 12) to remove the cover panel (front).
(9) Remove the comp case (top) fixing screws (2 for front
and 1 for right/ 4 × 10) to remove the comp case (top).
(10) Remove the comp case (front) fixing screws (4 for front
and 2 for right/ 4 × 10) to remove the comp case (front).
(11) Loosen the clamps, fasteners, band and cable straps for
the lead wire in the electrical parts box and separator.
(12) To disconnect the COMP lead wire, remove the terminal cover,
then remove the terminal cover fixing screw of nut (1 for front/ M5).
(13) Remove the electrical parts box fixing screws (2 for front/ 5 × 12), then
slide the electrical parts box upward to remove it.
(The electrical parts box is fixed to the side panel (R) with a hook on
the right side, and to the separator duct with a hook on the left side.)
* For W85Y model only
1
OCH681
PUHZ-W85YAA.UK
Photo 1
Wire grille
fixing screws
Photo 2-1
Propeller
Nut
Photo 3-1
Controller
circuit board
Terminal block
Reactors*
Cover panel
(front)
Photo 3-2
1
Comp case
(top)
Comp case
(front)
56
PHOTOS/FIGURES
Top panel fixing screws
Wire grille
Wire grille
fixing screws
Photo 2-2
Fan motor fixing screws
Fan motor
Lead wire of
Front panel fan motor
Electrical parts box
1
Top panel
Service panel
fixing screws
Service panel
Side panel (R)
Service panel
fixing screws
Fan motor fixing
screws
Electrical parts box
fixing screws