Removing The Fan Motor (Mf1, Mf2) - Mitsubishi Electric PUZ-A18NHA4 Service Manual

PUZ-A42NHA4(-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.

2. Removing the fan motor (MF1, MF2)

(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 1)
(3) Remove 5 fan grille fixing screws (5 × 12) to detach the
fan grille. (See Figure 1)
(4) Remove a nut (for right handed screw of M6) to detach
the propeller. (See Photo 1)
(5) Disconnect the connectors, CNF1, CNF2 on controller
circuit board in electrical parts box.
(6) Remove 4 fan motor fixing screws (5 × 25) to detach the
fan motor. (See Photo 2)
3. Removing the electrical parts box
(1) Remove the service panel. (See Figure 1)
(2) Remove the top panel. (See Figure 1)
(3) Disconnect the indoor/outdoor connecting wire from termi-
nal block.
(4) Remove all the following connectors from controller circuit board;
fan motor, linear expansion valve, thermistor <Outdoor
pipe>, thermistor <Discharge>, thermistor <Outdoor
2-phase pipe>, thermistor <Outdoor>, high pressure switch,
low pressure switch, 4-way valve coil. 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, CNF2)
• Linear expansion valve (LEV-A)
• Thermistor <Outdoor pipe> (TH3)
• Thermistor <Discharge> (TH4)
• Thermistor <Outdoor 2-phase pipe, Outdoor> (TH6/7)
• High pressure switch (63H)
• Low pressure switch (63L)
• 4-way valve coil (21S4)
(5) Remove the terminal cover and disconnect the
(6) Remove an electrical parts box fixing 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.
PUY-A42NHA4(-BS)
PHOTOS & ILLUSTRATION
Top panel fixing screws
Figure 1
Grille fixing
screws
Grille fixing
screws
Photo 1
Front panel
Propeller
Nut
Photo 3
Controller circuit board
(C.B.)
Screw
Cover panel fixing screws
116
Top panel
Service panel
Slide
Fan grille
Service panel
fixing screws
Photo 2
Fan
Fan motor fixing screws
motor
Fan motor fixing screws
Electrical
parts box
Electrical parts
box fixing screw
Terminal block
(TB1)
Valve bed
Compressor
(MC)
Terminal cover
Cover panel
(Front)