Disassembly Procedure - Mitsubishi Electric PUMY-P36NKMU2-BS Technical & Service Manual

DISASSEMBLY PROCEDURE

11
PUMY-P36NKMU2
PUMY-P36NKMU2-BS
: Indicates the visible parts in the photos/figures.
: Indicates the invisible 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 Figure 1)
(2) Remove the top panel. (See Figure 1)
(3) Remove 4 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 and CNF2 on outdoor
multi controller circuit board in electrical parts box.
(6) Remove 4 fan motor fixing screws (5 × 20) to detach the
fan motor. (See Photo 2)
Note: Tighten the propeller fan with a torque of 5.7 i 0.3
N·m [4.2 i 0.2 ft = lbs]
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 connecting wire from terminal block.
(4) Remove all the following connectors from outdoor multi con-
troller 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 (LEV-A, LEV-B)
Pull out the disconnected wire from the electrical parts box.
(5) Remove the terminal cover and disconnect the compres-
sor lead wire from the comp. terminal. (See Photo 3.)
Note: The terminal cover can be easily removed by
using a blade of flathead screwdriver.
OCH695B
PUMY-P48NKMU2
PUMY-P48NKMU2-BS PUMY-P60NKMU2-BS
Figure 1
Grille fixing
screws
Grille fixing
screws
Photo 1
Propeller
Photo 3
Front panel
fixing screws
(4x10)
136
PUMY-P60NKMU2
Note: Turn OFF the power supply before disassembly.
PHOTOS/FIGURES
Top panel fixing screws
Photo 2
Front panel
Nut
Electrical parts box
Front panel fixing
screws (5x12)
Terminal block
(TB1)
Front panel
fixing screws (5x12)
Continue to the next page
Top panel
Service panel
fixing screw
Service
panel
Slide
Fan grille
Service panel
fixing screws
Fan motor fixing screws
Fan
motor
Fan motor fixing screws
Outdoor multi
controller circuit
board (MULTI.B)
Terminal block
(TB3) (TB7)
Valve bed
fixing screws
Side panel
(R)
Valve bed
Compressor
(MC)
Terminal cover
Cover panel
(Rear)
Cover panel
Cover panel
(Front)
fixing screws