Daikin CTKC15QVM4 User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
Indoor Unit
Inverter / Non-Inverter
Wall Mounted Type
1.5/2.0/2.5/3.5/4.2/5.0 kW Class
9000/12000/15000/18000 Btu/h Class
Si041551EB

Service Manual
Removal Procedure
Indoor Unit
zCooling Only
CTKC15QVM4
CTKC20QVM4
CTKM25PV14
CTKM35PV14
CTKM42PV14
CTKM50PV14
CTKM09PV2S
CTKM12PV2S
CTKM15PV2S
CTKM18PV2S
CTKS25QVM
CTKS35QVM
CTV25PV1G
CTV35PV1G
CTV50PV1G
FTKC09QV2S
FTKC12QV2S
FTKC25QVM
FTKC35QVM
FTKC25QVM4
FTKC35QVM4
FTKC25QVMV
FTKC35QVMV
FTKM25PVM
FTKM35PVM
FTKM42PVM
FTKM50PVM

Si041551EB
Removal Procedure 1
Table of Contents
1. Air Filters / Front Panel ...........................................................................2
2. Front Grille ..............................................................................................3
3. Horizontal Blade......................................................................................4
4. Electrical Box ..........................................................................................5
5. PCBs .......................................................................................................8
6. Drain Pan / Swing Motors / Vertical Blade ASSYs................................12
7. Indoor Heat Exchanger .........................................................................16
8. Fan Rotor / Fan Motor...........................................................................18
Note: The illustrations may be slightly different depending on the model.

Air Filters / Front Panel Si041551EB
2Removal Procedure
1. Air Filters / 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. Remove the air filters. The air filter is not marked
for difference between the
right and left sides.
When reassembling, insert
the air filter along the guides.
Insert the air filter with the
“FRONT” mark faced up.
Be sure to insert the 2 hooks
when installing the air filter.
1
2
Open the front panel.
Unfasten the 2 hooks
and pull out the air filter.
2. Remove the front panel.
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.
Front panel
Hook Air filter
(R21000)
Left
(R23389)
Right
(R23390)
Front panel
(R21003)

Si041551EB Front Grille
Removal Procedure 3
2. 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 2 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
(R21004)
Hook
(R21005)
(R12715)

Horizontal Blade Si041551EB
4Removal Procedure
3. Horizontal Blade
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
shaft while bending the
horizontal blade
slightly.
Reassembling procedure
1. Fit the horizontal blade to the
right shaft first. Make sure to
rotate the horizontal blade so
the shaft fits correctly.
2. Fit the horizontal blade to the
center and left shafts.
2
3
Release the left shaft.
Release the right shaft.
4 Remove the horizontal
blade.
Horizontal blade
(R22051)
Shaft
(R21007)
Shaft
Left
(R21008)
Shaft
Right
(R23391)
Horizontal blade (R22052)

Si041551EB Electrical Box
Removal Procedure 5
4. Electrical Box
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.
Service cover can be
removed without removing
the front grille.
There is no hook at the top
of the service cover. Be
careful not to drop it when
the screw is loosened.
1 Remove the screw, and
then the service cover.
2
3
Remove the screw,
unfasten the hook and
remove the wire fixture.
Remove the 4 screws
of the terminal board
and disconnect the
connecting wire.
When reassembling, be sure
to fasten the hook before
tightening the screw.
2. Remove the electrical
box.
When reassembling, be sure
to insert the earth/ground
wire in the front slit and
under the thermistor
harness.
1
2
Remove the screw and
detach the earth/ground
wire.
Release the earth/
ground wire from the
front slit at the top of the
electrical box.
Service cover
(R22053)
Connecting
wire
Wire fixture
Hook
Terminal
board
(R22054) Hook (R22055)
Electrical
box
Earth/ground wire Front slit
(R24241)
Front slit Thermistor
harness
Earth/ground wire (R24242)

Electrical Box Si041551EB
6Removal Procedure
3 Pull out the indoor heat
exchanger thermistor.
Be careful not to lose the clip
of the thermistor.
The position of the indoor
heat exchanger thermistor
varies depending on the
model.
4 Unfasten the 4 hooks
and remove the
electrical box cover.
When reassembling, make
sure that the 4 hooks are
securely fastened.
5
6
Disconnect the
connector [S6].
Release the harnesses
from the 5 hooks.
[S6]: swing motor for horizontal
blade
Step Procedure Points
Indoor heat exchanger thermistor (R22058)
(R11268)
Clip
Hook
Hook
Electrical box
cover
(R22059)
[S6]
Hook Hook
(R24243)

Si041551EB Electrical Box
Removal Procedure 7
7
8
Disconnect the
connector [S11].
Release the harnesses
from the 5 hooks.
[S11]: swing motor for vertical
blades
Some models do not have
the harness for [S11].
9
10
Disconnect the
connector [S200].
Release the harnesses
from the 5 hooks.
[S200]: fan motor
11
12
Remove the screw of
the electrical box.
Slightly lift the electrical
box upward and
remove it.
When reassembling, make
sure to fasten the hook at the
front of the electrical box.
When reassembling, make
sure that the 2 hooks are
securely fastened to the
bottom frame.
Step Procedure Points
[S11]
Hook Hook
(R24244)
Hook
[S200]
Hook
(R23393)
Electrical box
(R22063) Hook
(R22064)
Hook
Hook Bottom frame
(R22065)

PCBs Si041551EB
8Removal Procedure
5. 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 control PCB. [S26]: display/signal receiver
PCB
1
2
Remove the connector
[S26].
Release the harnesses
from the 3 hooks and
the slit.
3 Disconnect all the 5
terminals.
4 Release the earth/
ground wire (yellow/
green) from the slit and
the groove.
[S26]
Hook
Slit
Hook
(R22066)
White RedBlack Earth/ground (yellow/green)
Earth/ground
(green)
(R22067)
123
FRONT
Black Red
Earth/ground (green)
Earth/ground
(yellow/green)
White
(R22265)
Slit
Earth/ground
wire
(yellow/green)
Groove
(R22069)

Si041551EB PCBs
Removal Procedure 9
5
6
Release the earth/
ground wire (green)
from the groove.
Release the terminal
board harness from the
groove and the 3
hooks.
7 Remove the connector
[S32] and release the
harness from the slit.
[S32]: thermistor
8 Unfasten the 4 hooks
and remove the control
PCB.
When reassembling, be sure
to fit the control PCB to the 4
projections.
Step Procedure Points
Groove
Earth/ground wire (green)
Hook
Terminal board harness (R22258)
Slit
[S32]
(R24245)
Hook
Hook
Control PCB
(R22259)
Projection
(R22260)

PCBs Si041551EB
10 Removal Procedure
2. Remove the
INTELLIGENT EYE
sensor PCB.
Some models do not have
the INTELLIGENT EYE
sensor PCB.
1 Unfasten the hook of
the display/signal
receiver unit.
2 Release the harness of
the display/signal
receiver unit from the
hook.
3 Release the harness
from the hook.
The INTELLIGENT EYE
sensor PCB can be removed
without disconnecting the
connector.
Step Procedure Points
Hook
Display/signal
receiver unit
Back of the electrical box
(R24246)
Hook
(R24247)
Hook
(R22076)
Hook
(R22077)

Si041551EB PCBs
Removal Procedure 11
4 Unfasten the 3 hooks
and remove the
INTELLIGENT EYE
sensor PCB.
3. Remove the display/
signal receiver PCB.
1 Release the harness
from the slit and the 3
hooks.
2 Turn over the PCB
ASSY, unfasten the 3
hooks and remove the
display/signal receiver
PCB.
Step Procedure Points
Hook
Hook
INTELLIGENT EYE sensor PCB (R24248)
Hook Slit
(R22079)
Hook
Hook
Back view Display/signal
receiver PCB
(R24249)

Drain Pan / Swing Motors / Vertical Blade ASSYs Si041551EB
12 Removal Procedure
6. Drain Pan / Swing Motors / Vertical Blade ASSYs
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 drain pan. Use a short screwdriver from
the back.
1 Lift up the indoor unit
and remove the screw.
2 Disconnect the drain
hose.
Hold the indoor unit up with a
piece of wood.
Place a plastic sheet around
the drain pan to prevent
wetting the floor with
remaining drain.
3 Remove the 3 screws.
4 Unfasten the 4 hooks
and remove the drain
pan.
Right view
(R24352)
Drain hose
(R22082)
(R22083)
Hook Drain pan
(R22084)

Si041551EB Drain Pan / Swing Motors / Vertical Blade ASSYs
Removal Procedure 13
When reassembling, make
sure that all the 4 hooks are
fastened.
2. Remove the swing motor
for horizontal blade.
1
2
Remove the filament
tape.
Remove the screw, and
then the swing motor
for horizontal blade.
3. Remove the swing motor
for vertical blades.
Some models do not have
the swing motor for vertical
blades.
1 Remove the 2 screws.
2 Release the shaft of the
vertical blade ASSY
from the swing motor
shaft with a flat
screwdriver and
remove the swing motor
ASSY.
Step Procedure Points
Hook Hook
(R22085)
Filament tape
Swing motor for
horizontal blade
(R22086)
Bottom view
(R24353)
Swing motor ASSY
Shaft
(R22088)

Drain Pan / Swing Motors / Vertical Blade ASSYs Si041551EB
14 Removal Procedure
3 Cut the clamp and
release the harness
from the hook.
4 Remove the screw and
pull out the link shaft.
5 Remove the swing
motor for vertical
blades.
4. Remove the vertical blade
ASSYs (auto-swing
models).
Each 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.
1
2
3
Unfasten the 3 hooks of
the vertical blade ASSY
by pressing them with a
flat screwdriver.
Remove the vertical
blade ASSY.
Remove the other
vertical blade ASSY in
the same way.
Step Procedure Points
Hook
Clamp
(R22089)
Link shaft
(R24250)
Swing motor for
vertical blade
(R22113)
Hook
Vertical blade
ASSY
(R22114)

Si041551EB Drain Pan / Swing Motors / Vertical Blade ASSYs
Removal Procedure 15
5. Remove the vertical blade
ASSYs (manual swing
models).
Each 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.
1 Unfasten the upper 2
hooks.
2
3
4
Unfasten the 3 hooks at
the shaft mounting part
by pressing them with a
flat screwdriver.
Remove the vertical
blade ASSY.
Remove the other
vertical blade ASSY in
the same way.
Step Procedure Points
Vertical blade ASSY
Hook
(R21046)
Hook
(R21047)

Indoor Heat Exchanger Si041551EB
16 Removal Procedure
7. Indoor Heat Exchanger
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
In pump-down work, be sure to stop the compressor before disconnecting the
refrigerant pipe. If the refrigerant pipe is disconnected with the compressor operating
and the stop valve open, air may be sucked in and may generate an over-pressure in
refrigeration cycle, thus resulting in pipe rupture or accidental injury.
When removing or reinstalling the indoor heat exchanger, be sure to wear gloves or
wrap the indoor heat exchanger with cloths. (You may be injured by the fins.)
Caution Be sure to conduct pump down operation before disassembling the refrigerant pipe.
If the refrigerant leaks, repair the spot of leaking, then collect all refrigerant from the
unit. After conducting vacuum drying, recharge proper amount of refrigerant.
From the viewpoint of global environmental protection, make sure to use a vacuum
pump for air purging.
Step Procedure Points
1. Disconnect the refrigerant
piping.
Place a plastic sheet around
the drain pan to prevent
wetting the floor with
remaining drain.
Hold the indoor unit up with a
piece of wood.
If embedded in the wall, the
drain hose can be
disconnected from the back
of the unit.
Carry out the removal work
with 2 wrenches.
1
2
3
4
5
Pull out and disconnect
the drain hose.
Wrap the open ends of
the drain hose with
plastic sheets to
prevent water dripping.
Disconnect the flare nut
for gas piping.
Disconnect the flare nut
for liquid piping.
Protect the open ends
of both the pipes and
the unit from moisture
intrusion.
2. Remove the indoor heat
exchanger.
1 Detach the indoor unit
from the installation
plate.
Drain hoseConnecting wires
Extension drain hose
Flare nut
(R24397)
(R24396)
(R24398)

Si041551EB Indoor Heat Exchanger
Removal Procedure 17
2 Unfasten the 2 hooks
and remove the piping
fixture on the back of
the indoor unit.
3 Slightly pull out the
auxiliary piping.
4 Remove the 2 screws
on the left side and
unfasten the hook on
the rear side.
5 Unfasten the 2 hooks
on the right side and lift
up the indoor heat
exchanger.
Step Procedure Points
Hook
Piping fixture
Back view
(R24354)
Auxiliary piping (R21036)
Hook
(R21037)
Hook
Indoor heat exchanger
Hook
(R22117)
When reassembling the
indoor heat exchanger,
make sure that the 2 hooks
are fastened.

Fan Rotor / Fan Motor Si041551EB
18 Removal Procedure
8. Fan Rotor / Fan Motor
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 screw of
the right side plate.
2 Unfasten the 2 hooks
and remove the right
side plate.
3 Remove the fan rotor/
fan motor.
When reassembling, make
sure the bushing and the 3
projections are fastened.
Right side plate
(R21039)
Hook Hook
Right view
(R24355)
Fan motorFan rotor
Bushing
(R21860)