Disassembly Procedure - Mitsubishi Electric PUZ-A NHA Series Service Manual

DISASSEMBLY PROCEDURE

11
PLA-A12AA PLA-A18AA
PLA-A12AA PLA-A18AA
1
OPERATING PROCEDURE
1. Removing the air intake grille
(1) Slide the knob of air intake grille to the direction of the
arrow 1 to open the air intake grille.
(2) Remove the string hook from the panel to prevent the
grille from dropping.
(3) Slide the shaft in the hinge to the direction of the arrow2
and remove the air intake grille.
2. Removing the room temperature thermistor
(1) Remove the screw( 1) in the room temperature thermistor
holder to remove the holder and the room temperature
thermistor.
(2) Remove the 1 screw from the bell mouth, and unscrew the
other 2 screws (fix to the oval hole which has a different
diameter) to remove the bell mouth.
(3) Hold the holder claw, and remove the room temperature
thermistor and holder.
(4) Disconnect the connector (CN20:red) on the indoor control
board.
3. Removing the electrical box
(1) Disconnect the lead wire of the vane motor from the clamp,
and disconnect the white connector (10P).
(2) Remove the room temperature thermistor with the holder.
(3) Remove the bell mouth.(See photo 1)
(4) Disconnect the relay connector in the electrical box.
Red (3P) for fan motor
Disconnect the connector on the indoor controller board.
White (2P) for pipe temperature detecting thermistor
Blue (3P) for drain pump
White (3P) for drain sensor
(5) Remove the 3 screws from the electrical box, loosen
another 2 screws to remove the box.
<Electrical parts in the electrical box>
Indoor controller board
Power board
Terminal block
Capacitor
PLA-A24AA PLA-A30AA
PLA-A24AA PLA-A30AA
1 1
PLA-A36AA
PLA-A36AA
1
Be careful on removing heavy parts.
PHOTOS & ILLUSTRATIONS
Figure 1
Air intake grille
Grille
Air intake grille knob
Photo 1
Bell mouth
Photo 2
Turbo fan
Electrical
box
Power
board
Indoor controller board
30
PLA-A42AA
PLA-A42AA
1
Screws
Room
temperature
thermistor
Air intake grille
Nut
Capacitor
Terminal
block
Connector
1