Mitsubishi Electric NTXMSM36A142BA Technical & Service Manual page 154

NTXMSM60A182BA
: Indicates the visible parts in the photos/figures.
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 (2 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 Photo 1)
(2) Remove 4 fan grille fixing screws (5 × 12) to detach the
fan grille. (See Photo 1)
(3) Remove a nut (for right handed screw of M6) to detach
the propeller. (See Photo 2)
(4) Disconnect the connectors, CNF1 and CNF2 on multi
controller board in electrical parts box.
(5) Remove 4 fan motor fixing screws (5 × 20) to detach the
fan motor. (See Photo 3)
Note: Tighten the propeller fan with a torque of 5.7 ± 0.3
N·m [4.2 ± 0.2 ft = lbs]
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 connecting wire from terminal block. (See
Photo 5)
(4) Remove all the following connectors from outdoor multi
controller circuit board;
<Diagram symbol in the connector housing>
• Fan motor (CNF1, CNF2)
• Thermistor <HIC pipe> (TH2)
• Thermistor <Outdoor liquid pipe> (TH3)
• Thermistor <Compressor> (TH4)
• Thermistor <Suction pipe/Ambient, Outdoor> (TH7/6)
• High pressure switch (63H)
• High pressure sensor (63HS)
• Low pressure sensor (63LS)
• 4-way valve (21S4)
• Bypass valve (SV1)
• Linear expansion valve (CNLVA/CNLVB)
Pull out the disconnected wire from the electrical parts box.
(5) Remove the terminal cover and disconnect the compres-
sor lead wire.
Note: The terminal cover can be easily removed by using
a blade of flathead screwdriver.
Figure 1
Terminal cover
OCHT810A
Comp. terminal
Note: Turn OFF the power supply before disassembly.
PHOTOS/FIGURES
Top panel fixing screws
Photo 1
Top panel
Grille fixing
screws
Grille fixing
screws
Photo 2
Propeller Front panel
Nut
Photo 4
Front panel fixing screws (5 x 12)
Front panel
fixing screws (5 x 12)
154
Service panel
fixing screw
Slide
Service
panel
Fan grille
Service panel
fixing screws
Photo 3
Fan motor fixing screws
Fan motor fixing screws
Front panel fixing screws (4 x 10)
Electrical parts box
Multi controller
board (MULTI.B)
Terminal block
(TB3) (TB7)
Terminal block
(TB1B)
Terminal block
(TB1)
Valve bed fixing
screws (4 × 10)
Valve bed
Compressor
(MC)
Terminal cover
Cover panel
(Rear)
Cover panel (Front)
Cover panel (Front) fixing
screws
Continue to the next page.
Fan
motor