Mitsubishi Electric PUZ-A12NKA7 Service Manual page 114

PUZ-A36NKA7
PUZ-A36NKA7-BS
OPERATING PROCEDURE
1. Removing the service panel, top panel, ice guard, and
propeller
(1) R emove 3 service panel fixing screws (5 × 12) and slide
the hook on the right downward to remove the service
panel. (See Photo 1)
(2) R emove screws (3 for front, 3 for rear/5 × 12) of the top
panel and remove it. (See Photo 1)
(3) R emove 4 grille fixing screws (5 × 12) from each grille
and remove it. (See Photo 1)
(4) P ull down the ice guard and remove it. (See Photo 2)
(5) R emove a nut (for right handed screw of M6) to detach
the propeller. (See Photo 2)
2. Removing the fan motor (MF1, MF2)
(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
front panel and the fan grille together. (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 connectors, CNF1, CNF2 (white) on the
controller circuit board in electrical parts box.
(6) R emove 4 fan motor fixing screws (5 × 25) to detach
the fan motor. (See Photo 3)
(7) When attaching the fan motor, make sure to route the
cable through the hook below the fan motor and fix
firmly with the clamp.
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 indoor/outdoor connecting wire from ter-
minal block.
(4) Remove all the following connectors from controller circuit
board; fan motor, linear expansion valve, thermistor <Liquid>,
thermistor <2-phase pipe>, thermistor <Ambient>, high pres-
sure switch, 4-way valve coil. Then remove a screw (4 × 8)
from the valve bed to remove the lead wire.
Pull out the disconnected wire from the electrical parts box.
<Diagram symbol in the connector housing>
• Fan motor (CNF1, CNF2)
• Linear expansion valve (LEV-A, B)
• Thermistor <Liquid> (TH3)
• Thermistor <Comp. surface> (TH33)
• Thermistor <2-phase pipe, Ambient> (TH6/7)
• Thermistor <Suction> (TH32)
• High pressure switch (63H)
• 4-way valve coil (21S4)
(5) Remove the terminal cover and disconnect the compressor lead wire.
(6) Remove an electrical parts box fixing screw (2 for front
/4 × 10) and detach the electrical parts box by pulling it
upward. The electrical parts box is fixed with 2 hooks on
the left and 1 hook on the right.
OCH636A
PUZ-A42NKA7
PUZ-A42NKA7-BS
PUY-A36NKA7
PUY-A36NKA7-BS
PHOTOS
Photo 1
Top panel fixing screws
Grille fixing
screws
Grille fixing
screws
Photo 2
Propeller
Nut
Photo 4
Controller circuit board
(C.B.)
Screw
Cover panel
fixing screws
114
PUY-A42NKA7
PUY-A42NKA7-BS
PHOTO: PUZ-A36NKA7
Top panel
Slide
Service panel
fixing screws
Service panel
Fan grille
Photo 3
Fan motor fixing screws
Fan
motor
Fan motor fixing screws
Electrical parts box
Electrical parts
box fixing screw
Terminal block
(TB1)
Valve bed
Compressor (MC)
Cover panel
(Front)