Daikin FTXM35K3V1B User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
Indoor Unit
Inverter
Wall Mounted Type
3.5/4.2/5.0 kW Class
Si041259EA

Service Manual
Removal Procedure
Indoor Unit
zHeat Pump
FTXM35K3V1B
FTXM42K3V1B
FTXM50K3V1B
FTXS35K2V1B
FTXS42K2V1B
FTXS50K2V1B

Si041259EA
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 ..........................................................................................6
6. PCBs .......................................................................................................8
7. Swing Motors ........................................................................................11
8. Indoor Heat Exchanger .........................................................................16
9. Fan Motor / Fan Rotor...........................................................................18
10.Vertical Blade ASSY .............................................................................19
Note: The illustrations may be slightly different depending on the model.

Air Filters Si041259EA
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 filter. The air filter is not marked
for difference between the
right and left sides.
Insert the air filter with the
"FRONT" mark faced up.
The air filter can be set
easily by inserting it along
the guides.
Be sure to insert the hooks
(at 2 lower positions) when
installing the air filter.
1Open the front panel.
2Pull out the air filter
downward and remove
it.
3Remove the other air
filter in the same way.
2. Remove the Titanium
apatite photocatalytic air-
purifying filters.
1Remove the Titanium
apatite photocatalytic
air-purifying filter ASSY
by unfastening the 4
projections from the
back of the filter.
The right and left filters are
interchangeable.
2Remove the Titanium
apatite photocatalytic
air-filter from its frame.
(R19019)
Air filter
Front panel
Titanium apatite photocatalytic
air-purifying filter ASSY
Air filter
(R19020)
Projection
Projection
(R13174)

Si041259EA 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
1Open the front panel
over the position where
it stops.
2Release the left rotary
shaft.
When reassembling the front
panel, fit the right and left
rotary shafts one by one into
the grooves and fully push
them into position.
3Release the right rotary
shaft and remove the
front panel.
(R19021)
Front panel
(R19022)
Rotary shaft
(R19023)

Front Grille Si041259EA
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
1Remove the 3 screws.
2Open the horizontal
blade and unfasten the
3 hooks at the top.
The convex marks (...) on
the front panel indicate the
position of the hooks.
3Pull out the upper part
of the front grille and lift
up the lower part, and
then remove the front
grille.
When reassembling, make
sure that the 3 hooks are
fastened as they were.
(R19024)
(R19025)
Hook
Horizontal blade (R19026)
(R19027)
Front grille

Si041259EA 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
1Open the horizontal
blade.
The center shaft can be
released easily by bending
the blade.
2Unfasten the center
shaft while bending the
horizontal blade (large)
slightly.
3Unfasten the left shaft.
4Unfasten the right shaft
and remove the
horizontal blade (large).
Installation procedure
1. Since the key pattern hook is
provided, rotate the blade
and fit it to the right shaft
first.
2. Fit the blade to the center
and left shafts.
When reassembling, mount
the large horizontal blade to
the upper position and the
small horizontal blade to the
lower position.
Do not put them in the wrong
place.
5Remove the horizontal
blade (small) in the
same way.
(R19028)
Horizontal blade (large)
(R19029)
(R19030)
(R19031)

Electrical Box Si041259EA
6Removal Procedure
5. Electrical Box
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1Remove the screw and
remove the service
cover.
2Remove the screw and
remove the wire fixture.
3Remove the 4 screws
of the terminal board
and disconnect the
connecting wires.
4Unfasten the 3 hooks
and remove the PCB
box cover.
(R19032)
Service cover
(R19033)
Terminal board
Wire fixture Connecting wire
Hook
PCB box
cover
(R19034)
Hook

Si041259EA Electrical Box
Removal Procedure 7
5Disconnect the
connectors [S1] [S41].
[S1]: fan motor
[S41]: swing motors
6Release the harnesses
for the fan motor and
swing motors from the
hooks.
7Remove the screw and
detach the earth /
ground wire.
Be careful not to lose the clip
of the thermistor.
8Pull out the indoor heat
exchanger thermistor.
9Remove the screw of
the electrical box.
Unfasten the hook at the
back.
10 Lift up the electrical box
and pull it out.
Step Procedure Points
Hook
[S1]
[S41]
Hook
(
R19035
)
Indoor heat exchanger thermistor
(R19036)
Earth / ground wire
Clip
(R11268)
(R19037)
Electrical box

PCBs Si041259EA
8Removal Procedure
6. PCBs
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 signal
receiver PCB.
[S46]: display PCB
1Disconnect the
connector [S46].
2Unfasten the 2 hooks
and remove the signal
receiver unit.
3Unfasten the 3 hooks
and remove the signal
receiver PCB.
[S48]: control PCB
4Disconnect the
connector [S48].
(R19038)
[S46]
(R19152)
Signal receiver unit
Hook
Hook
(
R19039
)
[S48] Si
g
nal receiver PCB
Hook