Operation Procedure - Mitsubishi Electric PKA-A18HA6 Service Manual

OPERATION PROCEDURE

3. REMOVING THE INDOOR CONTROLLER BOARD
AND IR WIRELESS CONTROLLER BOARD
(1) Remove the front panel. (Refer to step 2)
(2) Remove the room temp. thermistor TH1. (see Photo 3)
(3) Remove the electrical box covers (screw 4 × 12).
(See Photo 3)
(4) Disconnect the connectors on the indoor controller board.
(5) Remove the switch board cover.
(6) Pull out the indoor controller board toward you, then
disconnect the rest of connectors.
Remove the indoor controller board and switch board.
(7) Remove the holder of IR wireless controller board.
(8) Disconnect the connector of IR wireless controller board
and remove the IR wireless controller board from the
holder.
4. REMOVING THE ELECTRICAL BOX
(1) Remove the front panel. (Refer to step 2)
(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.
OCH580
Photo 3
Screw (top cover)
Nozzle assembly
Photo 4
Terminal
block (TB4)
Photo 5
Connector for
ground wire
Photo 6
33 33
PHOTOS
Screw (side cover) Electrical box
cover (top)
Electrical box
cover (side)
Room temp.
thermistor
(TH1)
Thermistor
holder
Screw
(side cover)
Switch holder
Holder of IR wireless
controller board
Indoor controller board (I.B)
Fixture
(right)
Terminal
block (TB4)
Terminal
block (TB5)
Screw
(Electrical box)
Fixture
(upper)