Disassembly Procedure; Removing The Panels On The Right Side Of The Unit; Removing The Electrical Parts Box - Mitsubishi Electric PUMY-P250YBM Technical & Service Manual

11

DISASSEMBLY PROCEDURE

11-1. OUTDOOR UNIT
: Indicates the visible parts in the photos/figures.
: Indicates the invisible parts in the photos/figures.
OPERATING PROCEDURE

1. Removing the panels on the right side of the unit

(1) Remove service panel fixing screws (5 × 12) and slide the
hook on the right downward to remove the service panel.
(2) Remove screws (5 × 12) of the top panel and remove it.
(3) Remove front cover panel fixing screws (5 × 12) and
remove the front cover panel.
(4) Remove back cover panel fixing screws (5 × 12) and
remove the back cover panel.
(5) Remove side panel R fixing screws (5 × 12) in the rear of
the unit and then remove the side panel R.
2. Removing the fan motor (MF1, MF2)
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) Remove fan grille fixing screws (5 × 12) to detach the fan
grille. (See Photo 1)
(4) Remove a nut (for right handed screw of M6) to detach
the propeller. (See Photo 2.)
(5) Disconnect the connectors, CNF1 and CNF2 on multi con-
troller board in electrical parts box.
(6) Remove fan motor fixing screws (5 × 20) to detach the fan
motor. (See Photo 3)
Note:
MF1 (Upper) ... The color of its connector is white.
MF2 (Lower) ... The color of its connector is blue.

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 multi controller 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> (TH6/7)
• High pressure switch (63H)
• High pressure sensor (63HS)
• Low pressure sensor (63LS)
• 4-way valve (21S4)
• Bypass valve (SV1)
• Oil return valve (SV3)
• Linear Expansion valve (LEV-A, LEV-B)
Pull out the disconnected wire from the electrical parts box.
(5) Remove the cover panel front. (See Photo 1)
(6) Remove the cover panel rear. (See Photo 1)
(7) Remove the side panel R. (See Photo 1)
(8) Remove the terminal cover and disconnect the compressor
lead wire.
OCH760
Note: Turn OFF the power supply before disassembly.
PHOTOS/FIGURES
Photo 1 Top panel fixing screws
Grille fixing
screws
Grille fixing
screws
Fan grille
Photo 2
Propeller Front panel
Nut
Photo 4
Front panel fixing
screws (5x12)
Front
panel
fixing
screws
(4x10)
Front panel
fixing screws (5x12)
125
Top panel
Service
panel
Side panel R
Slide
Service panel
fixing screws
Cover panel
fixing screws
Cover panel (Rear)
Cover panel (Front)
Photo 3
Fan motor
Fan motor
fixing screws
Fan motor fixing
screws
Electrical parts box
M-NET power circuit
board (M-NET P.B)
Multi controller
board (MULTI.B)
Valve bed
fixing screws
Valve bed
Compressor
(MC)
Terminal cover
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