Mitsumi electronic PKA-A12HA4 Photos, Operation Procedure, Removing The Indoor Controller Board

	OPERATION PROCEDURE			PHOTOS
3. REMOVING THE INDOOR CONTROLLER BOARD		Photo 3
AND IR WIRELESS CONTROLLER BOARD		Screw (top cover)		Screw (side cover) Electrical box
(1)	Remove the front panel. (Refer to step 2)			cover (top)
				Electrical box
(2)	Remove the room temp. thermistor TH1. (see Photo 3)
				cover (side)
(3)	Remove the electrical box covers (screw 4 × 12).
(See Photo 3)				Room temp.
(4)	Disconnect the connectors on the indoor controller board.			thermistor
(5)	Remove the switch board cover.			(TH1)
(6)	Pull out the indoor controller board toward you, then			Thermistor
	disconnect the rest of connectors.			holder
	Remove the indoor controller board and switch board.			Screw
(7)	Remove the holder of IR wireless controller board.
(8)	Disconnect the connector of IR wireless controller board			(side cover)
	and remove the IR wireless controller board from the	Nozzle assembly		Switch holder Holder of IR wireless
	holder.
				controller board
		Photo 4		Indoor controller board (I.B)
			Terminal
			block (TB4)

Fixture (right)

4. REMOVING THE ELECTRICAL BOX	Photo 5
(1) Remove the front panel. (Refer to step 2)	Connector for	Fixture
	ground wire	(upper)

(2)Remove the electrical box covers. (See Photo 3)

(3)Remove the nozzle assembly. (Refer to step 5)

(4) Disconnect the connecting wire from terminal block (TB4) and terminal block for MA-remote controller (TB5).

(5)Disconnect the connectors on the indoor controller board.

(6)Disconnect the connector for the ground wire. (See Photo 5)

(7)Pull the disconnected lead wire out from the electrical box.

(8)Remove the screw of electrical box. (See Photo 6)

(9)Push up the upper fixture (See Photo 5) catch to remove the box, then pull the right fixture (See Photo 4) and

remove it from the box fixture.	Photo 6	Terminal
		block (TB4)
		Terminal
		block (TB5)
		Screw
		(Electrical box)

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