Daikin FTXS20K2V1B User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
Indoor Unit
Inverter
Wall Mounted Type
2.0/2.5 kW Class
Si041140

Service Manual
Removal Procedure
Indoor Unit
Applicable Models
zHeat Pump
FTXS20K2V1B
FTXS25K2V1B

Si041140
Removal Procedure 1
Table of Contents
1. Removal of Air Filters..............................................................................2
2. Removal of Horizontal Blade...................................................................4
3. Removal of Front Panel ..........................................................................6
4. Removal of Front Grille ...........................................................................7
5. Removal of Vertical Blade ASSYs ..........................................................8
6. Removal of Electrical Box .....................................................................10
7. Removal of Swing Motor / PCBs...........................................................13
8. Removal of Indoor Heat Exchanger......................................................18
9. Removal of Fan Rotor / Fan Motor........................................................21
10.Exchange of Piping Direction (Drain Hose)...........................................24
Note: The illustrations may be slightly different depending on the model.

Removal of Air Filters Si041140
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 a signal from the
remote controller is
received, the receiving tone
sounds and the operation
lamp flickers 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 of the air filter to
unfasten the 2 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
mounting the air filter.
Room temperature thermistor
(R16654)
Signal receiver
(R16655)
Operation
lamp
TIMER
lamp
INTELLIGENT
EYE lamp
[ON/OFF] button
(Forced cooling operation [ON/OFF] button)
(R16656)
Front panel
Hook
(R16657)
Air filter

Si041140 Removal of Air Filters
Removal Procedure 3
3Pull out the air filter
downward and remove
it.
3. Remove the Titanium
apatite photocatalytic
air-purifying filters.
1The Titanium apatite
photocatalytic air-
purifying filter is
attached to the back of
the air filter.
2Remove the Titanium
apatite photocatalytic
air-purifying filter frame
by bending the air filter
and unfastening the
projections from the air
filter frame.
3Remove the Titanium
apatite photocatalytic
air-purifying filter from
its frame (at 5 positions)
by bending it.
To prevent the damage, do
not remove the Titanium
apatite photocatalytic air-
purifying filter from the frame
when cleaning it.
The Titanium apatite
photocatalytic air-purifying
filter is not marked for
difference between the right
and left sides.
Step Procedure Points
(R16658)
Air filter
(R8025)
Titanium apatite
photocatalytic
air-purifying filter
Projection
(R14599)
Hook
(R8027)

Removal of Horizontal Blade Si041140
4Removal Procedure
2. Removal of Horizontal Blade
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 horizontal
blade.
2Unfasten the center
shaft while bending the
horizontal blade
slightly.
The center shaft can be
released easily by bending
the blade.
Cautions for reassembling
1. Since the key pattern hook
is provided, rotate the
horizontal blade and fit it to
the right shaft first.
2. Fit the horizontal blade to
the center and left shafts.
3Unfasten the left shaft
of the horizontal blade.
4Unfasten the right shaft
of the horizontal blade.
(R16659)
Horizontal blade
(R16660)
(R16661)
Shaft
(R16662)
Key pattern hook
Left Right
Shaft

Si041140 Removal of Horizontal Blade
Removal Procedure 5
5Remove the horizontal
blade.
Step Procedure Points
(R16663)

Removal of Front Panel Si041140
6Removal Procedure
3. 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.
2Release the right rotary
shaft.
The rotary shaft on each
side can be released easily
by sliding each shaft inward.
3Release the left rotary
shaft.
4Remove the front panel. When reassembling the
front panel, fit the right and
left rotary shafts one by one
into the grooves and fully
push them in position.
Left side
Front panel
Right side
(R16664)
Right
(R16665)
Rotary shaft
(R16666)
Left Rotary shaft
Rotary shaft
(R16667)

Si041140 Removal of Front Grille
Removal Procedure 7
4. 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
1Remove the 2 screws,
which fix the front grille
to the main body.
2The front grille has 3
hooks on the upper
part.
Refer to the removal
procedure in a reverse way
when reassembling.
3Press each hook, and
also lift the grille up to
unfasten the hooks.
4Pull the upper part of
the front grille out and
lift the lower part up,
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 as they were.
(R16668)
Front grille
(R16669)
Hook
Left Center Right
(R16670)
(R16671)
Left Center Right
(R12715)

Removal of Vertical Blade ASSYs Si041140
8Removal Procedure
5. Removal of Vertical Blade ASSYs
Procedure Warning Be sure to wait for 10 minutes or more after turning off all power
supplies before disassembling work.
Step Procedure Points
1Unfasten the right and
left hooks of the fan
guard with pliers.
Narrow the edges of the
hook to unfasten it.
2Unfasten the 4 hooks at
the bottom. Remove the
fan guard.
Repeat the same procedure
to remove the fan guard on
the other side.
3Unfasten the hooks at
the upper 2 positions.
A vertical blade ASSY has 6
fins. It is impossible to
replace only one fin.
The vertical blade ASSY is
not marked for difference
between right and left.
Hook
Fan guard
Hook
(R14608)
(R11646)
Hook
(R11647)
Hook
Hook
(R8020)
Vertical blade ASSY
(R8021)

Si041140 Removal of Vertical Blade ASSYs
Removal Procedure 9
4Unfasten the 3 hooks at
the shaft mounting part
by pressing them with a
flat screwdriver.
5Remove the vertical
blade ASSY.
Repeat the same procedure
to remove the vertical blade
ASSY on the other side.
Step Procedure Points
(R8022)
Hook
(R8023)

Removal of Electrical Box Si041140
10 Removal Procedure
6. 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
1. Disconnect the connecting
wires.
Preparation
Remove the front grille
according to the “Removal
of Front Grille”.
1Remove the screw of
the service cover.
2Pull out the service
cover down in the
direction of the arrow.
3The figure shows the
connections of wire
harnesses.
(R16672)
Service cover
(R16673)
Terminal board Electrical box
Wire retaining plate
Indoor heat exchanger thermistor
(R14586)

Si041140 Removal of Electrical Box
Removal Procedure 11
4Remove the screw of
the wire retaining plate.
5Remove the screws of
the terminal board and
disconnect the
connecting wires.
Connecting wires
(1): black
(2): white
(3): red
( ): yellow / green
6Pull out the indoor heat
exchanger thermistor.
Take care not to lose the clip
of thermistor.
2. Remove the electrical box.
1Remove the screw and
release the earth wire.
Step Procedure Points
(R12044)
Terminal board
(R11639)
Connecting
wires
(R12045)
Indoor heat exchanger thermistor
Clip
(R11268)
Thermistor
Screw
Earth
wire
(R17472)

Removal of Electrical Box Si041140
12 Removal Procedure
2Disconnect the
connector for the fan
motor [S200].
Release the fan motor
harnesses from the
hook.
3Remove the screw of
the electrical box.
4Slide the electrical box
to the right first and
detach the horizontal
blade from the electrical
box.
5Pull the electrical box.
There is a hook on the
bottom frame. When
reassembling, fit the rear
side of the electrical box to
the hook.
Step Procedure Points
(R15844)
[S200]
(R16649)
Hook
(R12048)
(R15845)
(R11657)
Hook
Bottom frame

Si041140 Removal of Swing Motor / PCBs
Removal Procedure 13
7. Removal of Swing Motor / PCBs
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
(2).
Preparation
Remove the electrical box
according to the “Removal
of Electrical Box”.
1Unfasten the hooks at
the upper 2 positions of
the shield plate (2).
2Unfasten the hook at
the lower position,
and remove the shield
plate (2).
2. Remove the swing motor.
1Remove the screw of
the swing motor.
(R14603)
Hook
Shield plate (2)
Electrical box
Hook
(R16650)
Swing motor
(R11650)

Removal of Swing Motor / PCBs Si041140
14 Removal Procedure
2Unfasten the hook, and
disconnect the
connector.
The connector of the swing
motor has a hook.
Press the hook with a flat
screwdriver to unfasten it.
3. Remove the PCBs.
1Unfasten the hook, and
release the display PCB
ASSY.
2Remove the
INTELLIGENT EYE
fixing plate by twisting
it.
3Unfasten the 3 hooks
and remove the
INTELLIGENT EYE
sensor PCB.
Step Procedure Points
(R8037)
(R14847)
(R16674)
Display PCB ASSY
Hook
(R16675)
INTELLIGENT
EYE fixing plate
(R16652)

Si041140 Removal of Swing Motor / PCBs
Removal Procedure 15
4Disconnect the
connector [S36] from
the INTELLIGENT EYE
sensor PCB.
5Turn over the display
PCB ASSY, and
unfasten the 3 hooks to
remove the display
PCB.
6Disconnect the
connector [S27] from
the display PCB.
7The figure shows the
component parts of the
display PCB.
[S27]: for control PCB
Step Procedure Points
(R16676)
[S36]
(R16651)
Display PCB
(rear side)
(R14848)
[S27]
TIMER lamp Signal receiver
Operation lamp
[ON/OFF] button

Removal of Swing Motor / PCBs Si041140
16 Removal Procedure
4. Remove the control PCB.
1Lift the shield plate (1)
and unfasten the 2
hooks.
2Slide the shield plate
(1) and remove it.
3Release the harnesses
from the hooks.
4Disconnect the
terminals from the
terminal board with
pliers.
1 : black, upper
2 : white, lower
3 : red, upper
: green/yellow, upper
green, lower
Step Procedure Points
(R12061)
Hook
Shield plate (1)
(R12062)
(R14609)

Si041140 Removal of Swing Motor / PCBs
Removal Procedure 17
5Release the 4 hooks.
Lift up the upper part of
the control PCB and
remove it.
6The figure shows the
control PCB.
[S6]: swing motor
[S25]: INTELLIGENT EYE
sensor PCB
[S26]: display PCB
[S32]: indoor heat exchanger
thermistor
[S200]: fan motor
Step Procedure Points
(R16677)
Hook
Hook
Control
PCB
(R16653)
[S200] [S25]
[S26] [S6]
[S32]

Removal of Indoor Heat Exchanger Si041140
18 Removal Procedure
8. Removal of Indoor Heat Exchanger
Procedure 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 refrigerant
piping.
Preparation
Remove the electrical box
according to the “Removal
of Electrical Box”.
Caution
Be sure to stop the
compressor before
disconnecting the refrigerant
pipe. If the refrigerant pipe is
disconnected with the
compressor running and the
stop valve opened, air may be
sucked in to generate an
over-pressure in refrigeration
cycle, thus resulting in pipe
rupture or accidental injury.
If the drain hose is
embedded in the wall,
disconnect the drain hose
beforehand.
1Remove the screws
which fix the indoor unit
to the installation plate.
2Lift the indoor unit with
a wooden base.
3Pull out the drain hose. Place a plastic sheet under
the drain hose as remaining
drain may leak.
4Disconnect the flare nut
for gas piping.
Carry out the removal work
with 2 wrenches.
Caution
From the viewpoint of global
environmental protection,
make sure to use a vacuum
pump for air purging.
When the pipings are
disconnected, protect the
both openings from entering
moisture.
(R12174)
(R12175)
Wooden base
Drain hose
Extension drain hose
Connecting wires
(R12176)
(R12177)