Daikin FTXZ09NV1S User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
Indoor Unit
Inverter
Wall Mounted Type
2.5/3.5/5.0 kW Class
9000/12000/18000 Btu/h Class
Si041411E

Service Manual
Removal Procedure
Indoor Unit
zHeat Pump
FTXZ09NV1S
FTXZ12NV1S
FTXZ18NV1S
FTXZ25NVM
FTXZ35NVM
FTXZ50NVM
FTXZ25NVM4
FTXZ35NVM4
FTXZ50NVM4
FTXZ25NVMM
FTXZ35NVMM
FTXZ50NVMM
FTXZ25NVMV
FTXZ35NVMV
FTXZ50NVMV

Si041411E
Removal Procedure 1
Table of Contents
1. Front Panel..............................................................................................2
2. Streamer Unit / Dust Box ........................................................................3
3. Filters ......................................................................................................4
4. Front Grilles / Horizontal Blades .............................................................5
5. Electrical Box / PCBs ..............................................................................9
6. Filter Cleaning Unit................................................................................18
7. Swing Motors ........................................................................................22
8. Indoor Heat Exchanger .........................................................................26
9. Fan Rotor / Fan Motor...........................................................................29
Note: The illustrations may be slightly different depending on the model.

Front Panel Si041411E
2Removal Procedure
1. 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. Appearance features
2. Remove the front panel.
1Open the front panel.
2
3
Slide the left rotary
shaft to the outside and
release it.
Release the right rotary
shaft in the same way.
4Remove the front
panel.
(R19803)
Front panel
(R19804)
(R19805)
Rotary shaft (left)
(R19806)
Rotary shaft (right)
(R19807)

Si041411E Streamer Unit / Dust Box
Removal Procedure 3
2. Streamer Unit / Dust Box
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 streamer
unit.
The streamer unit can be
removed without removing
the front panel.
1Remove the streamer
unit.
2. Remove the dust box.
1Slide the right and left
knobs on the dust box
inward and remove the
dust box.
2
3
Slide the cover to the
left and unlock it.
Turn the cover and
open the dust box.
4Pull out the dust brush.
Streamer unit
(R19808)
Dust box
Knob
(R19809)
(R19810)
Cover
Dust brush
(R19811)

Filters Si041411E
4Removal Procedure
3. 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 filter. Remove the dust box before
removing the air filters.
1Pull down the filter
holding frame.
2Turn up the display unit.
3
4
Pull the air filter
downward and remove
it.
Remove the other air
filter in the same way.
2. Remove the photocatalytic
air-purifying and
deodorizing filter.
1Remove the
photocatalytic air-
purifying and
deodorizing filter.
Filter holding frame
(R19813)
(R19814)
Display unit
Air filter
(R19815)
Photocatalytic air-purifying
and deodorizing filter (R19817)

Si041411E Front Grilles / Horizontal Blades
Removal Procedure 5
4. Front Grilles / 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. Remove the front grille
(left).
1Open the 2 horizontal
blades.
2Remove the 2 screws
of the front grille (left).
3Unfasten the 2 hooks
and remove the front
grille (left).
Horizontal blade
(R20710)
Front grille (left)
(R20711)
Hook
(R20712)
Hook

Front Grilles / Horizontal Blades Si041411E
6Removal Procedure
2. Remove the front grille
(right).
1Remove the 3 screws
of the front grille (right).
2Unfasten the 2 hooks
and remove the front
grille (right).
3. Remove the front grille
(bottom).
1Remove the screw
cover with a flat head
screwdriver.
Step Procedure Points
Front grille (right)
(R20713)
Hook
Hook
(R20714)
Screw cover
(R19824)

Si041411E Front Grilles / Horizontal Blades
Removal Procedure 7
2Remove the screw and
remove the service
cover ASSY.
3Open the air inlet cover.
4Unfasten the 8 hooks
and remove the front
grille (bottom).
If piping work is difficult,
remove the piping cover and
cut the front grille (bottom) to
expand the opening.
Step Procedure Points
(R19825)
Service cover ASSY
(R19826)
Air inlet cover (R19827)
Hook
Hook
Hoo
k
Hook
Hook
Front grille
(bottom) (R19828)
Cut
Cut
(R19829)
Piping cover

Front Grilles / Horizontal Blades Si041411E
8Removal Procedure
4. Remove the horizontal
blades.
1
2
Release the center
shaft of the horizontal
blade (upper).
Release the left and
right shafts and remove
the horizontal blade
(upper).
3
4
Release the shaft of the
horizontal blade (lower)
in the same way.
Remove the horizontal
blade (lower).
5. Remove the air inlet
cover.
1Release the shafts of
the air inlet cover in the
order of right, center,
and left and remove the
air inlet cover.
Step Procedure Points
(R19830)
Horizontal blade (upper)
Horizontal blade (lower)
(R19831)
(R20715)
Air inlet cover

Si041411E Electrical Box / PCBs
Removal Procedure 9
5. Electrical Box / PCBs
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 wires.
1
2
Remove the screw and
remove the wire fixture.
Remove the 4 screws
on the terminal board
and disconnect the
connecting wire.
2. Remove the electrical
box.
1Remove the screw.
2
3
Unfasten the 3 hooks.
Remove the front grille
(front).
4Unfasten the hook and
remove the shield plate.
Terminal board
Wire fixture
Connecting
wire
(R20716)
(R19834)
Hook
Front grille (front)
(R19835)
(R19836)
Hook
Shield plate

Electrical Box / PCBs Si041411E
10 Removal Procedure
5Remove the screw and
slightly draw out the
electrical box.
6Release the harnesses
from the 3 hooks.
7Disconnect the
connectors [S41] [S44]
[S46] and release the
harnesses from the
hook.
[S41]: swing motors, humidity
sensor PCB for
humidifying
[S44]: brush motor, filter motors,
limit switch for brush
[S46]: signal receiver / display
PCB
8Remove the 2 screws.
Step Procedure Points
Electrical box
(R19837)
(R19838)
Hook
Hook
Hook
[S46]
[S44]
[S41]
(R19839)
(R19840)

Si041411E Electrical Box / PCBs
Removal Procedure 11
9Unfasten the 3 hooks
and lift the filter
cleaning unit.
10 Remove the earth /
ground screw.
11 Detach the indoor heat
exchanger thermistor.
Step Procedure Points
(R19841)
Filter cleaning unit
Hook Hook
(R19842)
(R19843)
Indoor heat
exchanger
thermistor

Electrical Box / PCBs Si041411E
12 Removal Procedure
12 Release the harness of
the indoor heat
exchanger thermistor
from the hook and draw
the electrical box a little.
13 Disconnect the
connector [S200].
[S200]: fan motor
14 Remove the electrical
box.
3. Remove the control PCB.
1
2
Remove the shield
plate.
Remove the screw and
remove the terminal
board.
The shield plate has 3
hooks.
Step Procedure Points
(R19844)
Hook
[S200]
(R19845)
(R19846)
Electrical box
Shield plate
Terminal board
(R20751)
Hook
Hook
(R20718)

Si041411E Electrical Box / PCBs
Removal Procedure 13
3Remove the 2 screws
and remove the earth /
ground wires from the
hook.
4
5
Disconnect the
connectors [S33] [S52].
Release the harnesses
from the hook.
[S33]: humidity sensor PCB for
room
[S52]: high voltage unit PCB
6
7
Disconnect the
connectors [S32] [S53].
Release the harnesses
from the hook.
[S32]: indoor heat exchanger
thermistor
[S53]: limit switch for streamer
8Release the harnesses
for the terminal board
from the hook.
Step Procedure Points
(R20719 )
Hook
Earth / ground
wire
(R19850)
[S52] [S33]
Hook
[S53] [S32]
Hook
(R19851)
Hook
(R19852)

Electrical Box / PCBs Si041411E
14 Removal Procedure
9Unfasten the 2 hooks
and remove the control
PCB.
[S32]: indoor heat exchanger
thermistor
[S33]: humidity sensor PCB for
room
[S41]: swing motors, humidity
sensor PCB for
humidifying
[S44]: brush motor, filter motors,
limit switch for brush
[S46]: signal receiver / display
PCB
[S52]: high voltage unit PCB
[S53]: limit switch for streamer
[S200]: fan motor
4. Remove the humidity
sensor PCB for room.
1
2
Unfasten the hook and
remove the humidity
sensor PCB for room.
Disconnect the
connector.
Step Procedure Points
Hook
(R20753)
Control PCB
[S33][S52]
[S53]
[S32]
[S41]
[S44]
[S46]
[S200]
(R20773)
Hook
(R19855)
Connector for
control PCB
Humidity
sensor PCB
for room

Si041411E Electrical Box / PCBs
Removal Procedure 15
5. Remove the high voltage
unit PCB.
1
2
Remove the insulation
sheet.
Unfasten the hook and
remove the high
voltage unit PCB.
3Disconnect the
connectors [S401]
[B401] [CN403] and
remove the high
voltage unit PCB.
[S401]: for control PCB
[B401][CN403]: streamer
4Release the harnesses
from the hooks.
5Remove the 2 screws
and remove the contact
switches.
Step Procedure Points
(R19856)
Hook
Insulation sheet
High voltage unit PCB
[B401]
[CN403]
[S401]
(R19857)
(R20754)
Hook
(R19859)
Contact switch

Electrical Box / PCBs Si041411E
16 Removal Procedure
6. Remove the limit switch.
1
2
Unfasten the 4 hooks
and remove the cover.
Remove the limit
switch.
7. Remove the signal
receiver / display PCB.
1Remove the display
unit from the filter
cleaning unit.
2Remove the 2 screws
on the back of the
display unit.
3
4
Remove the streamer
duct and the mounting
plate.
Unfasten the 5 hooks of
the signal receiver /
display PCB.
Step Procedure Points
(R19860)
Hook Cover
Limit switch
Hook
(R19861)
Display unit
(R19862)
(R19863)
Hook Hook
Streamer duct
Mounting
plate

Si041411E Electrical Box / PCBs
Removal Procedure 17
5
6
Remove the signal
receiver / display PCB.
Disconnect the
connectors [S26] [S56].
[S26]: INTELLIGENT EYE
sensor PCBs
[S56]: control PCB
8. Remove the
INTELLIGENT EYE
sensors.
1Unfasten the 4 hooks
and remove the lamp
cover.
2Pinch and remove the
INTELLIGENT EYE
sensors.
Step Procedure Points
Signal receiver /
display PCB [S56] [S26]
(R20774)
(R19865)
Hook Hook
(R19866)
Lamp cover
(R19867)
INTELLIGENT EYE sensor

Filter Cleaning Unit Si041411E
18 Removal Procedure
6. Filter Cleaning Unit
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 cleaning unit.
1Remove the 2 screws
on the both side.
2Unfasten the center
hook.
3Remove the filter
cleaning unit.
2. Remove the brush motor.
1Disconnect the 3
connectors and release
the harness from the
hook.
(R20720)
Hook
(R20721)
Filter cleaning unit
(R20722)
(R20723)
Red
White
Green
Hook