Mitsubishi Electric PKFY-P20VAM-E Technical And Service Manual page 20

OPERATION PROCEDURE
3. REMOVING THE INDOOR MICRO CONTROLLER BOARD
AND INDOOR POWER BOARD
(1) Remove the front panel. (Refer to 2)
(2) Remove the electrical box cover (screw 4
(Refer to the photo 2)
INDOOR MICRO CONTROLLER BOARD
(1) Disconnect the following connectors on the indoor micro
controller board.
(connector in front of)
CN60, CN5V, CN34, CN29, CN21
CN42, CN81, CN3A, CN20
(2) Pull out the indoor micro controller board toward you, then
disconnect the rest of connectors.
CN53M, CN35M (See the photo 3)
INDOOR POWER BOARD
(1) Disconnect the following connectors on the indoor power
board.
FAN, CN53P, CN35P, CN2M, CND
(2) Remove the screws of the indoor power board, then pull out
the indoor power board toward you. (See the photo 3)
4. REMOVING THE ELECTRICAL BOX
(1) Remove the front panel. (Refer to 2)
(2) Remove the electrical box cover.
(3) Pull the nozzle assembly toward you as opening the catch
of the nozzle assembly.
(4) Disconnect the indoor/outdoor connector.
(5) Disconnect the following connector on the indoor micro
controller board. (See the photo 4)
CN60, CN5V, CN34, CN29, CN21, CN20, CN3A
(6) Disconnect the following connector on the indoor power
board. (See the photo 4)
FAN, CN2M, CND
(7) Disconnect the ground wire.
(8) Pull the disconnected lead wire out from the electrical box.
(9) Push up the upper fixture catch to remove the box, then
pull the lower fixture and remove it from the box fixture.
PHOTOS & ILLUSTRATIONS
Photo 2
10).
Photo 3
Photo 4
20
Electrical box cover
Electrical box
Indoor micro controller board
Electrical box
Indoor micro
fixture (upper)
controller board
Ground wire set screw
Electrical box
Screw cap
Indoor power
board
Indoor power
board
Indoor power
board
fixture (lower)