Mitsubishi Electric PUZ-A12NKA7 Service Manual page 109

PUZ-A24NHA7
PUZ-A24NHA7-BS
OPERATING PROCEDURE
1. Removing the service panel and top panel
(1) R emove 3 service panel fixing screws (5 × 12) and slide
the hook on the right downward to remove the service
panel.
(2) R emove screws (3 for front, 3 for rear/5 × 12) of the top
panel and remove it.
2. Removing the fan motor (MF1)
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) R emove 5 fan grille fixing screws (5 × 12) to detach the
fan grille. (See Photo 1)
(4) R emove a nut (for right handed screw of M6) to detach
the propeller. (See Photo 2)
(5) D isconnect the connector CNF1 on controller circuit
board in electrical parts box.
(6) R emove 4 fan motor fixing screws (5 × 20) to detach
the fan motor. (See Photo 3)
3. Removing the electrical parts box
(1) Remove the service panel. (See Photo 1)
(2) Remove the top panel. (See Photo 1)
(3) D isconnect the indoor/outdoor connecting wire from terminal block.
(4) D isconnect the connector CNF1, LEV-A and LEV-B on
the controller circuit board.
<Symbols on the board>
• CNF1 : Fan motor
• LEV-A, LEV-B : LEV
(5) Disconnect the pipe-side connections of the following parts.
• Thermistor <Liquid> (TH3)
• Thermistor <Discharge> (TH4)
• Thermistor <2-phase pipe, Ambient> (TH7/6)
• Thermistor <Heat sink> (TH8)
• High pressure switch (63H)
• 4-way valve coil (21S4)
• Thermistor <Suction> (TH32)
• Thermistor <Comp. surface> (TH33)
(6) R emove the terminal cover and disconnect the compressor lead wire.
(7) R emove an electrical parts box fixing screw (4 × 10)
and detach the electrical parts box by pulling it upward.
T he electrical parts box is fixed with 2 hooks on the left
and 1 hook on the right.
OCH636A
PUZ-A30NHA7
PUZ-A30NHA7-BS
109
PUY-A24NHA7
PUY-A24NHA7-BS
PHOTOS
Photo 1
Top panel fixing screws
Fan grille
Grille fixing Cover panel
screws
(Front)
Front panel
Photo 2
Propeller
Nut
Front panel fixing screws
Photo 4
Electrical parts box
Terminal block
(TB1)
PUY-A30NHA7
PUY-A30NHA7-BS
Top panel
Slide
Side panel (R)
Service panel
Cover panel
(Rear)
Service panel
fixing screws
Photo 3
Fan
motor
Fan motor fixing screws
(MF1)
Fan motor
fixing screws
Electrical parts
box fixing screws
Controller circuit
board (C.B.)