Disassembly Procedure - Mitsubishi Electric PLA-A12BA Service Manual

11

DISASSEMBLY PROCEDURE

PLA-A12BA PLA-A18BA
PLA-A12BA PLA-A18BA
1
OPERATING PROCEDURE
1. Removing the air intake grille
(1) Slide the knob of air intake grille toward the arrow
open the air intake grille.
(2) Remove drop prevention hook from the panel.
(3) Slide the shaft in the hinge to the direction of the arrow
and remove the air intake grille.
2. Removing the room temperature thermistor (TH1)
(1) Remove the air intake grille and the filter. (See Figure 1)
(2) Remove the 2 screws from the electrical box.
(3) Disconnect the connector CN20 (Red) from the indoor con-
troller board.
(4) Remove the room temperature thermistor and holder.
3. Removing the indoor controller board (I.B)
(1) Remove the air intake grille and the filter. (See Figure 1)
(2) Remove the 2 screws from the electrical box cover.
(3) Disconnect the connectors :
CNMF (White/ 7P) for fan motor
CN44 (White/ 4P) for thermistor (TH2/ TH5)
CNP (Blue/ 3P) for drain pump
CN4F (White/ 4P) for float switch
CN01 (Black/ 5P) for earth and reactor
CNV (White/ 20P) for vane motor
(4) Remove the 6 supports from indoor controller board.
(5) Remove the indoor controller board.
4. Removing the electrical box
(1) Remove the air intake grille and the filter. (See Figure 1)
(2) Remove the 2 screws from the electrical box cover.
(3) Disconnect the connectors. (Refer to 3.)
(4) Remove 2 electrical box fixing screws and remove 2 hooks.
(5) Pull the electrical box.
<Electrical parts in the electrical box>
Indoor controller board
Terminal block (TB4)(TB5)
PLA-A24BA PLA-A30BA
PLA-A24BA PLA-A30BA
1 1
to
PLA-A36BA
PLA-A36BA
1
PHOTOS & ILLUSTRATIONS
Figure 1
Photo 1
Electrical box cover
Photo 2
Electrical box
Fixing screw
Electrical box
34
PLA-A42BA
PLA-A42BA
1
Be careful on remov-
ing heavy parts.
Filter
Fixing screw
(Electrical box)
Room temp.
Bell mouth
thermistor (TH1)
Turbo fan
Electrical box
Indoor controller
Fixing screw
board (I.B)
1