Daikin FTKS20KVLT User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
Indoor Unit
Inverter
Wall Mounted Type
2.0/2.5/3.0/3.5/4.2/4.6/5.0 kW Class
Si041049

Service Manual
Removal Procedure
Indoor Unit
zCooling Only zHeat Pump
FTKS20KVLT FTXS20KVLT
FTKS25KVLT FTXS25KVLT
FTKS30KVLT FTXS30KVLT
FTKS25KVMA FTXS25KVMA
FTKS35KVMA FTXS35KVMA
FTXS46KVMA
FTXS20G2V1B
FTXS25G2V1B FTXL20G2V1B
FTXS35G2V1B FTXL25G2V1B
FTXS42G2V1B FTXL35G2V1B
FTXS50G2V1B
FTXG25JV2CW
FTXS20J2V1B FTXG35JV2CW
FTXS25J2V1B FTXG50JV2CW
FTXS35J2V1B FTXG50JV2C
FTXS42J2V1B
FTXS50J2V1B FTXS20G2V1B
FTXS25G2V1B
FTXS35G2V1B
FTXS42G2V1B
FTXS50G2V1B
FTXS20J2V1B
FTXS25J2V1B
FTXS35J2V1B
FTXS42J2V1B
FTXS50J2V1B
ATXS20G2V1B
ATXS25G2V1B
ATXS35G2V1B
ATXS42G2V1B
ATXS50G2V1B

Si041049
Removal Procedure 1
Table of Contents
1. Removal of Air Filters..............................................................................2
2. Removal of Front Panel ..........................................................................4
3. Removal of Front Grille ...........................................................................5
4. Removal of Horizontal Blades / Vertical Blades......................................7
5. Removal of Electrical Box .....................................................................11
6. Removal of PCBs (Pattern 1)................................................................14
7. Removal of PCBs (Pattern 2)................................................................20
8. Removal of Swing Motors (Pattern 1) ...................................................24
9. Removal of Swing Motors (Pattern 2) ...................................................28
10.Removal of Indoor Heat Exchanger ......................................................31
11.Removal of Fan Motor...........................................................................34
Note: The illustrations may be slightly different depending on the model.

Removal of Air Filters Si041049
2Removal Procedure
1. Removal of Air Filters
Procedure 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
Warning
Dangerous: High voltage
A high voltage is applied to all
the electric circuits of this
product including
thermistors.
When the signal receiver
catches a signal from the
remote controller, the
receiving tone sounds and
the operation lamp blinks
immediately to confirm the
signal reception.
When the [ON/OFF] button
is kept pressed for 5
seconds, the forced cooling
operation is performed for
about 15 minutes.
2. Remove the air filters.
1Open the front panel to
the position where it
stops.
2Slightly push up the
center knob of the air
filter and release the
hooks.
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 hooks
(at 2 lower positions) when
reassembling the air filter.
3Pull out the air filter
downward and remove
it.
(R7900)
(R7901)
Signal receiver
Operation lamp
TIMER lamp
[ON/OFF] button Room temperature thermistor
INTELLIGENT
EYE sensor
INTELLIGENT
EYE lamp
(R7902)
Front panel
(R7903)
Air filter

Si041049 Removal of Air Filters
Removal Procedure 3
3. Remove the Titanium
apatite photocatalytic air-
purifying filters.
1The Titanium apatite
photocatalytic air-
purifying filter ASSY is
attached to the back of
the air filter.
The right and left filters are
interchangeable.
2Remove the Titanium
apatite photocatalytic
air-purifying filter ASSY
by unfastening the
projections from the
back of the air filter
frame.
3Unfasten the 5 hooks
and remove the
Titanium apatite
photocatalytic air-
purifying filter from its
frame.
Step Procedure Points
(R7904)
Air filter
Titanium apatite
photocatalytic
air-purifying filter ASSY
(R13487)
Projection
(R13174)

Removal of Front Panel Si041049
4Removal Procedure
2. Removal of Front Panel
Procedure 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.
2Slide the left rotary
shaft to the right and
release it.
When reassembling the front
panel, fit the right and left
rotary shafts one by one into
the grooves and fully push
them into position.
3Slide the right rotary
shaft to the left and
release it.
4Remove the front
panel.
(R7906)
Front panel
(R7907)
Rotary shaft
(R7909)
Rotary shaft
(R7910)

Si041049 Removal of Front Grille
Removal Procedure 5
3. Removal of Front Grille
Procedure 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 service cover. Preparation
Remove the front panel
according to the “Removal of
Front Panel”.
1Remove the screw of
the service cover.
2Pull out the service
cover diagonally down
in the direction of the
arrow.
3The figure shows the
inside.
(R7911)
Service cover
(R13488)
(R13489)

Removal of Front Grille Si041049
6Removal Procedure
2. Remove the front grille.
1Remove the 2 screws.
2Unfasten the 3 hooks at
the top.
The convex marks (...) on
the front panel indicate the
position of the hooks.
3Pull the upper part of
the front grille out and
lift the lower part up,
and then remove the
front grille.
When reassembling, make
sure that all the 3 hooks are
fastened as they were.
Step Procedure Points
(R13490)
(R13491)
Hook
(R12715)
(R12268)

Si041049 Removal of Horizontal Blades / Vertical Blades
Removal Procedure 7
4. Removal of Horizontal Blades / Vertical Blades
Procedure 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 horizontal
blade (large).
1Open the horizontal
blade (large).
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.
2Unfasten the center
shaft while bending the
horizontal blade (large)
slightly.
3Unfasten the left shaft.
4Unfasten the right shaft. There is a key alignment at
the right shaft. When
reassembling, insert the right
shaft first while turning.
After inserting the right shaft,
first mount the horizontal
blade to the center shaft and
then to the left shaft.
(R7921)
Horizontal blade (large)
Horizontal blade (small)
(R13175)
(R13073)
(R13492)
Key alignment

Removal of Horizontal Blades / Vertical Blades Si041049
8Removal Procedure
2. Remove the horizontal
blade (small).
1Unfasten the center
shaft while bending the
horizontal blade (small)
slightly.
2Unfasten the left shaft.
3Unfasten the right shaft. There is a key alignment at
the right shaft. When
reassembling, insert the right
shaft first while turning.
After inserting the right shaft,
first mount the horizontal
blade to the center shaft,
and then to the left shaft.
3. Remove the fan guard. Some models have no fan
guard.
1Unfasten the hooks at
the lower part of the fan
guard with a flat
screwdriver.
Step Procedure Points
(R13493)
Horizontal blade (small)
(R13494)
(R13495)
Key alignment
(R13751)

Si041049 Removal of Horizontal Blades / Vertical Blades
Removal Procedure 9
2Remove the fan guard.
4. Remove the vertical blade
ASSYs.
1Detach the pivot from
the interlock shaft for
vertical blades with a
flat screwdriver.
2Remove the interlock
rod.
3Unfasten the hooks at
the upper 3 positions by
pressing them with a
flat screwdriver.
Step Procedure Points
(R8079)
(R13092)
Vertical blade ASSY Pivot
Interlock
shaft
(R13093)
Interlock rod
(R13094)

Removal of Horizontal Blades / Vertical Blades Si041049
10 Removal Procedure
4Remove the vertical
blade ASSY.
A vertical blade ASSY has 5
fins.
It is impossible to replace
only one fin.
The vertical blade ASSY is
not marked for difference
between right and left.
Step Procedure Points
(R13095)
Hook
Vertical blade

Si041049 Removal of Electrical Box
Removal Procedure 11
5. Removal of Electrical Box
Procedure Warning Be sure to wait for 10 minutes or more after turning off all power
supplies before disassembling work.
Step Procedure Points
1The figure shows the
connections of the wire
harnesses.
Preparation
Remove the front grille
according to the “Removal of
Front Grille”.
2Remove the screw of
the wire retainer.
3Remove the 4 screws
of the terminal board
and disconnect the
connecting wires.
4Disconnect the
connector for the fan
motor [S1].
(R13496)
Electrical box
(R13497)
Wire
retainer
(R16968)
Terminal
board
Connecting
wire
(R13499)
[S1]

Removal of Electrical Box Si041049
12 Removal Procedure
5Disconnect the
connector for the swing
motors [S41].
6Release the harness for
the swing motors from
the hook.
7Cut the clamp near the
indoor heat exchanger
thermistor.
Some models have no clamp
near the indoor heat
exchanger thermistor.
8Pull out the indoor heat
exchanger thermistor.
The position of the indoor
heat exchanger thermistor
varies by model.
Be careful not to lose the clip
of the thermistor.
Step Procedure Points
(R7935)
[S41]
(R7936)
(R13104)
(R7937)
Indoor heat exchanger thermistor
Clip
(R11268)

Si041049 Removal of Electrical Box
Removal Procedure 13
9Remove the screw and
detach the earth /
ground wire.
10 Remove the screw of
the electrical box.
11 Unfasten the hook at
the upper far side by
pressing it from above
and pulling the
electrical box.
12 Lift up the electrical box
and pull it out.
There is a hook also at the
lower part of the back. When
reassembling the electrical
box, make sure that it is
securely fastened.
Step Procedure Points
(R16863)
Earth / ground wire
(R3939)
(R8081)
Hook
(R8082)

Removal of PCBs (Pattern 1) Si041049
14 Removal Procedure
6. Removal of PCBs (Pattern 1)
Procedure 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 shield plate. Preparation
Remove the electrical box
according to the “Removal of
Electrical Box”.
1The figure shows the
appearance of the
electrical box.
2Unfasten the hooks at
the upper 2 positions of
the shield plate.
3Unfasten the hook at
the side of the shield
plate.
4Lift up the shield plate
to unfasten the lower
hooks and remove it.
(R13747)
Signal receiver PCB
Control PCB
Shield plate
INTELLIGENT EYE
sensor PCB
Display PCB
(inside)
(R8085)
Hook
Hook
(R10619)
Shield plate
Hook (side)
Hook (lower)

Si041049 Removal of PCBs (Pattern 1)
Removal Procedure 15
2. Remove the terminal
board.
1Remove the screw and
remove the terminal
board.
3. Remove the signal
receiver unit.
1Unfasten the 3 hooks.
2Unfasten the hook on
the opposite side, and
lift up the signal
receiver unit.
Step Procedure Points
(R10315)
Terminal board
(R12277)
Signal receiver unit
(R8262)

Removal of PCBs (Pattern 1) Si041049
16 Removal Procedure
3Remove the signal
receiver unit.
4. Remove the
INTELLIGENT EYE
sensor PCB.
1Unfasten the 3 hooks
and remove the
INTELLIGENT EYE
sensor PCB.
2Disconnect the
connector [S26] from
the INTELLIGENT EYE
sensor PCB.
Step Procedure Points
(R12278)
Hook
(R8088)
Signal receiver unit
(R8092)
INTELLIGENT EYE
sensor PCB
(R8093)
[S26]

Si041049 Removal of PCBs (Pattern 1)
Removal Procedure 17
5. Remove the signal
receiver PCB.
1Unfasten the 3 hooks
and remove the signal
receiver PCB.
2Disconnect the
connector [S48] from
the signal receiver
PCB.
6. Remove the display PCB. The display PCB is
positioned on the rear side of
the signal receiver unit.
1The figure shows the
connection of the wire
harness for the display
PCB.
Step Procedure Points
(R8090)
Signal
receiver
PCB
(R8091)
[S48]
(R8094)
Display PCB

Removal of PCBs (Pattern 1) Si041049
18 Removal Procedure
2Unfasten the 4 hooks
and remove the display
PCB.
3Disconnect the
connector [S49] from
the display PCB.
7. Remove the control PCB.
1Unfasten the lower 2
hooks of the control
PCB.
2Lift up the bottom of the
control PCB and pull it
out.
The control PCB is also fixed
by 2 upper hooks. When
reassembling, be sure to fit
all the 4 hooks.
Step Procedure Points
(R10318)
Hook
(R8096)
LED 3 (Green)
LED 1 (Green)
[S49]
LED 2 (Yellow)
(R8097)
Hook
Control PCB
(R8098)