Mitsubishi Mr.SLIM MFZ-KA09NA Service Manual page 31

OPERATING PROCEDURE
2. Removing the electronic control P.C. board and the
display receiver P.C. board
(1) Remove the panel. (Refer to 1.)
(2) Remove the screw of the electrical cover, and then the
electrical cover. (See Photo 3.)
(3) Remove the screw of the indoor/outdoor connecting wire,
and then the indoor/outdoor connecting wire.
(4) Unhook the lamp cover from the catch. (See Photo 4.)
(5) Open the lamp cover. Pull out the display receiver P.C.
board, and disconnect the connector on the display
receiver P.C. board.
(6) Remove the screw of the wire connected from the
electronic control P.C. board, and then the wire.
(See Photo 4.)
(7) Pull the electronic control P.C. board slightly toward you
from the electrical box, and disconnect all the connectors
on the electronic control P.C. board.
(8) Pull out the electronic control P.C. board from the electrical
box.
NOTE: Skip (4) and (5) when the display receiver P.C. board
dose not have to be removed.
3. Removing the electrical box
(1) Remove the panel. (Refer to 1.)
(2) Remove the electrical cover. (Refer to 2.)
(3) Remove the screw of the indoor/outdoor connecting wire,
and then the indoor/outdoor connecting wire. Remove the
ground wire as well.
(4) Remove the screw of the conduit plate, and then the
conduit plate. (Refer to Photo 4.)
(5) Remove the screws of the wires connected from
the heat exchanger and the box assembly, and then both
the wires. (See Photo 4.)
(6) Pull the electronic control P.C. board slightly toward you.
Disconnect the following connectors on the electronic
control P.C. board. (See Photo 5.)
•Fan motor connectors < CN211, CN212 >
•Horizontal vane motor connector < CN151 >
•Damper motor connector < CN152 >
•Display receiver P.C. board connectors < CN106, CN125 >
•Indoor coil thermistor connectors < CN112, CN113 >
•Room temperature thermistor connector < CN111 >
•Damper limit switch connectors < CN1X1, CN1Y1 >
•Upper nozzle assembly relay connector.
(7) Remove the screw of the electrical box. (See Photo 4.)
(8) Unhook the electrical box from the upper catch and pull out
the electrical box from the box.
OBH568A
Photo 3
Photo 4
Screws of the
conduit plate
Photo 5
31
PHOTOS
Screw of the
electrical cover
Lamp cover
Screw of the wire
connected from the
electronic control
P.C. board
Screw of the
ground wire
Screw of the wire
connected from the
heat exchanger
Screw of the
electrical box
Screw of the wire
connected from the
box assembly
Indoor coil thermistor
connector CN112,
CN113
Display receiver P.C.
board connector
CN106
Display receiver P.C.
board connector
CN125
Horizontal vane
motor connector
CN151
Damper motor
connector CN152
Fan motor
connector CN211
Fan motor
connector CN212
Upper nozzle assembly
relay connector