Daikin FTK18NMVJU User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
Indoor Unit
Inverter
Wall Mounted Type
15000/18000/24000 Btu/h Class
Si041553EB

Service Manual
Removal Procedure
Indoor Unit
zCooling Only zHeat Pump
FTK18NMVJU FTX15NMVJU
FTK24NMVJU FTX18NMVJU
FTKN18NMVJU FTX24NMVJU
FTKN24NMVJU FTXN18NMVJU
FTXN24NMVJU
FTK24P5VL
FTX24N5VL
FTH24P5VL

Si041553EB
Removal Procedure 1
Table of Contents
1. Air Filters .................................................................................................2
2. Front Panel..............................................................................................3
3. Front Grille ..............................................................................................4
4. Horizontal Blades ....................................................................................5
5. Electrical Box / Swing Motor ...................................................................6
6. PCBs .....................................................................................................10
7. Indoor Heat Exchanger .........................................................................13
8. Fan Rotor / Fan Motor...........................................................................16
9. Fan Guards / Vertical Blade ASSYs......................................................18
Note: The illustrations may be slightly different depending on the model.

Air Filters Si041553EB
2Removal Procedure
1. Air Filters
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1. Remove the air filters. The air filter is not marked
for difference between the
right and left sides.
The air filter can be set
easily by inserting it along
the guides.
Insert the air filter with the
“FRONT” mark faced up.
Be sure to insert the 2 lower
hooks when installing the air
filter.
1
2
3
Open the front panel.
Unfasten the 2 hooks
and pull out the air filter
downward to remove it.
Remove the other air
filter in the same way.
2. Remove the optional
filters.
The right and left filters are
interchangeable.
1 Remove the optional
filter ASSY by
unfastening the 4
projections from the
back of the air filter
frame.
2
3
Unfasten the 5 hooks
and remove the
optional filter from its
frame.
Remove the other
optional filter in the
same way.
Front panel
Air filterHook
(R21491)
Optional filter ASSY
Projection
(R21492)
Optional filter
frame
Optional
filter
Hook
Hook
(R24270)

Si041553EB Front Panel
Removal Procedure 3
2. Front Panel
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1 Release the left and
right shafts.
2 Remove the front panel. When reassembling the front
panel, fit the right and left
shafts one by one into the
grooves and fully push them
in position.
Left Shaft
(R24362)
Right Shaft
(R24285)
Front panel
(R21496)

Front Grille Si041553EB
4Removal Procedure
3. Front Grille
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1 Remove the 3 screws
of the front grille.
2
3
Unfasten the 3 hooks at
the top.
Pull out the upper part
of the front grille, lift up
the lower part, and then
remove the front grille.
The convex marks (…) on
the front panel indicate the
position of the hooks.
When reassembling, make
sure that all the 3 hooks are
fastened.
Front grille
(R21497)
Hook
(R21498)
(R12715)

Si041553EB Horizontal Blades
Removal Procedure 5
4. Horizontal Blades
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1 Release the center
shafts of the upper
horizontal blade while
bending the blade
slightly.
2
3
Release the left shaft.
Release the right shaft.
4 Remove the upper
horizontal blade.
Installation procedure
1. Fit the right shaft of the
horizontal blade first. Make
sure to rotate the horizontal
blade so the shaft fits in the
correct position.
2. Fit the horizontal blade to the
center and left shafts.
When reassembling, install
the lower horizontal blade
first.
5 Remove the lower
horizontal blade in the
same way.
Upper horizontal blade
Center shaft
(R21499)
Shaft
Left
(R21008)
Shaft
Right
(R24271)
Upper horizontal blade (R21500)
Lower horizontal blade (R21501)

Electrical Box / Swing Motor Si041553EB
6Removal Procedure
5. Electrical Box / Swing Motor
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1. Disconnect the
connecting wire.
The service cover can be
removed without removing
the front grille.
The service cover has no
hook and may fall when the
screw is loosened. Be
careful not to drop the
service cover.
1 Remove the screw, and
then the service cover.
2
3
4
Remove the screw, and
then the wire fixture.
Remove the screw, and
then the conduit holding
the connecting wire.
Remove the 4 screws
of the terminal board
and disconnect the
connecting wire.
Conduit is only for U.S.
models.
2. Remove the electrical
box.
When reassembling, be sure
to insert the earth/ground
wires in the front slit and
green/yellow wire is above
the green wire.
When reassembling, make
sure to pass the green earth/
ground wire behind the heat
exchanger tube (the tube
with the thermistor).
1
2
Remove the 2 screws
and detach the earth/
ground wires.
Release the earth/
ground wires from the
front slit at the top of the
electrical box.
Service cover
(R21502)
Wire fixture Conduit
Terminal board
Connecting
wire
(R21503)
Electrical
box
Front slit
Earth/ground wire (green/yellow)
Earth/ground wire (green) (R24272) Green/yellow
Green
(R24275)

Si041553EB Electrical Box / Swing Motor
Removal Procedure 7
3 Pull out the indoor heat
exchanger thermistor.
Be careful not to lose the clip
of the thermistor.
When reassembling, pass
the indoor heat exchanger
thermistor behind the green
earth/ground wire.
4 Release the thermistor
harness from the slit at
the top of the electrical
box.
5 Unfasten the 4 hooks
and remove the
electrical box cover.
When reassembling, make
sure the 4 hooks are
securely fastened.
Step Procedure Points
Indoor heat
exchanger
thermistor
(R21505)
Clip
(R11268)
Thermistor harness Electrical box
Thermistor
harness
Slit
(R24273)
Electrical box
cover
Hook
Hook
Hook
(R21508)
When reassembling, be
sure to insert the thermistor
harness in the slit as shown
in the picture.

Electrical Box / Swing Motor Si041553EB
8Removal Procedure
6
7
Disconnect the
connector [S200].
Release the harnesses
from the 4 hooks and
the groove.
[S200]: fan motor
8
9
Disconnect the
connector [S6].
Release the harnesses
from the 2 hooks and
from the groove.
[S6]: swing motor
10 Remove the screw of
the electrical box.
Step Procedure Points
Hook Hook
[S200]
Groove
Right view
(R24363)
Hook
[S6]
Groove
(R21510)
Electrical
box
(R22754)