Disassembly Procedure - Mitsubishi Electric PUMY-P60NKMU1 Technical & Service Manual

11

DISASSEMBLY PROCEDURE

PUMY-P60NKMU1
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 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 con-
troller 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 i 0.3 N·m
[4.2 i 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)
• Electronic expansion valve (CNLVA/CNLVB)
Pull out the disconnected wire from the electrical parts box.
(5) Remove the terminal cover and disconnect the compressor lead wire.
Note: The terminal cover can be easily removed by using a
blade of flathead screwdriver.
Figure 1
Terminal cover
OCH613B
PUMY-P60NKMU1-BS
Comp. terminal
Note: Turn OFF the power supply before disassembly.
PHOTOS/FIGURES
Top panel fixing screws
Photo 1
Grille fixing
screws
Grille fixing
screws
Fan grille
Photo 2
Propeller Front panel
Nut
Photo 4
Multi controller
board (MULTI.B)
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120
Top panel
Service
panel
Slide
Service panel
fixing screws
Photo 3
Fan motor fixing screws
Fan
motor
Fan motor fixing screws
Electrical
parts box
Electrical parts box
fixing screws
Terminal block
(TB3) (TB7)
Terminal block
(TB1)
Valve bed fixing
screws (4 × 10)
Compressor (MC)
Terminal cover
Front cover panel
Cover panel fixing
screws