Daikin FTXN24KVJU User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
Indoor Unit
Inverter / Non-Inverter
Wall Mounted Type
5.0/6.0/7.1 kW Class
15000/18000/24000 Btu/h Class
Si041142

Service Manual
Removal Procedure
Indoor Unit
Applicable Models
zCooling Only zHeat Pump
FTXN15KVJU FTXN15KVJU
FTXN18KVJU FTXN18KVJU
FTXN24KVJU FTXN24KVJU
FTKN50KVM FTX50KVM
FTKN60KVM FTX60KVM
FT15LV2S FTXS50KVM
FT18LV2S FTXS60KVM
FTXS71KVM
FT50HV1
FT60HV1
FT50HV14
FT60HV14
FT60HV16
FT50JV1V
FT50MV16
FTE50KV1
FTE60KV1
FTE50KV14
FTE60KV14
FTE50LV1V
FTE60LV1V
FTE50LV16
FTE60LV16
FTE50LV169
FTE60LV169
FTE50MV16
FTE60MV16
FTN50HV1G
FTN60HV1G

Si041142
Removal Procedure 1
Table of Contents
1. Removal of Air Filters / Front Panel ........................................................2
2. Removal of Front Grille ...........................................................................5
3. Removal of Horizontal Blades / Vertical Blades......................................7
4. Removal of Electrical Box / PCBs / Swing Motors ..................................9
5. Removal of Indoor Heat Exchanger......................................................15
6. Removal of Fan Motor / Fan Rotor........................................................18
Note: The illustrations may be slightly different depending on the model.

Removal of Air Filters / Front Panel Si041142
2Removal Procedure
1. Removal of Air Filters / 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
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.
Some models have no
HOME LEAVE lamp.
2. Remove the air filters.
1Open the front panel to
the position where it
stops.
2
3
Slightly push up the
center knob of the air
filter and unfasten the
hooks.
Pull out the air filter
downward and remove
it.
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
mounting the air filter.
(R12786)
Operation lamp
Signal receiver
TIMER lamp
[ON/OFF] button
(R17229)
Room temperature thermistor
HOME LEAVE
lamp
(R6701)
Front panel
Air filter
(R6702)

Si041142 Removal of Air Filters / Front Panel
Removal Procedure 3
3. Remove the Titanium
apatite photocatalytic air-
purifying filters.
The right and left filters are
interchangeable.
Some models have no
Titanium apatite
photocatalytic air-purifying
filter.
Some models have Air-
purifying filters with
photocatalytic deodorizing
function instead.
Some models have air filters
only.
1Push up the bottom of
the Titanium apatite
photocatalytic air-
purifying filter to
unfasten the hooks (2
on lower, 3 on upper)
and take the filter out.
Step Procedure Points
Hook
Hook
(R2751)
Titanium apatite
photocatalytic air-
purifying filter
(R12788)

Removal of Air Filters / Front Panel Si041142
4Removal Procedure
4. Remove the front panel.
1While opening the front
panel further than it
stops, release both the
shafts and remove the
front panel.
Slide the front panel from
side to side to release each
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.
Step Procedure Points
(R2753)
(R2754)
(R2755)

Si041142 Removal of Front Grille
Removal Procedure 5
2. 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 "Removal of the
Air Filters / Front Panel".
You can remove the front
grille without detaching the
service cover.
1Remove the screw and
remove the service
cover.
2. Remove the front grille.
1Remove the 3 screws
of the front grille.
Refer to the removal
procedure in a reverse way
when reassembling.
Service cover (R2756)
(R2757)
(R2758)
Front grille

Removal of Front Grille Si041142
6Removal Procedure
2Unfasten the 3 hooks
on the top of the front
grille.
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.
Make sure that all the 3
hooks are engaged securely
when reassembling.
Step Procedure Points
Hook
(R2759)
Hook
(R2760)
(R2761)
(R2762)

Si041142 Removal of Horizontal Blades / Vertical Blades
Removal Procedure 7
3. 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
blades.
1Open the horizontal
blades.
2Bend the horizontal
blade slightly and
release the center
shaft. (2 locations)
Remove both the horizontal
blades (upper and lower) in
the same way.
3Release the left shaft.
4Slide the horizontal
blade to the left and
release the right shaft.
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.
Horizontal blade
(R6703)
(R2765)
Center shaft
Left shaft
Center shaft
(R12894)
Right shaft
(R2766)

Removal of Horizontal Blades / Vertical Blades Si041142
8Removal Procedure
2. Remove the vertical
blades.
The unit has 3 sets of
vertical blades linked to one
another with interlock rods.
1Release the right and
left shafts.
2Unfasten the 3 hooks
for each set of vertical
blades.
3Pull the vertical blades
rightward and remove
them.
Step Procedure Points
Vertical blade
(R6705)
Hook
(R2768)
(R6706)

Si041142 Removal of Electrical Box / PCBs / Swing Motors
Removal Procedure 9
4. Removal of Electrical Box / PCBs / Swing Motors
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 electrical
box.
Preparation
Remove the front grille
according to the “Removal of
Front Grille”.
1Remove the screw and
remove the drip proof
plate.
2Cut the clamp. The locations of the clamp
and the indoor heat
exchanger thermistor are
different depending on the
model.
3
4
5
Pull out the indoor heat
exchanger thermistor.
Remove the screw of
the earth wire.
Remove the screws of
the connection wires.
Be careful not to lose the clip
for the thermistor.
(R2770)
Drip proof plate
(R2771)
(R6707)
Indoor heat exchanger thermistor
Earth wire
(R17175)
Connection
wire
Wire fixture
Clip
(R11234)

Removal of Electrical Box / PCBs / Swing Motors Si041142
10 Removal Procedure
6Remove the screw and
remove the terminal
board.
You can remove the
electrical box without
detaching the terminal
board.
Screw: M4 × 30
7Disconnect the
connector for the fan
motor [S1].
8Disconnect the
connectors for the
swing motor [S6] [S8].
[S6]: for horizontal blade
[S8]: for vertical blade
Some models have no
harness for [S8].
9Remove the screw of
the electrical box.
Step Procedure Points
Terminal board
(R2773)
[S1]
(R2774)
(R2775)
[S6]
[S8]
Electrical box
(R3205)

Si041142 Removal of Electrical Box / PCBs / Swing Motors
Removal Procedure 11
10 Dislocate the electrical
box to the left and
unfasten the back hook.
The electrical box has a
hook on its back.
11 Pull the electrical box
out.
Catch the back hook of the
electrical box when
reassembling.
2. Remove the PCBs.
1Remove the screw on
the electrical box.
Screw: M4 × 16
2Push the shield plate
and unfasten the hook.
The shield plate also has 2
hooks on the upper side.
Step Procedure Points
(R2777)
(R2778)
(R2779)
Shield
plate
Hook
(R13224)

Removal of Electrical Box / PCBs / Swing Motors Si041142
12 Removal Procedure
3Press the signal
receiver unit down and
unfasten the hooks on
the upper side, and
then unfasten the hooks
on the lower side.
4Cut the clamp.
5The signal receiver unit
has 4 PCBs.
Unfasten the hooks and
remove each PCB.
Disconnect every
connector from each
PCB.
Remove the signal receiver
unit while pushing the hooks
of connectors.
Some models have no
INTELLIGENT EYE sensor
PCB.
6Cut the clamp.
Step Procedure Points
Signal receiver unit
(R12895)
(R17177)
Display PCB Signal receiver PCB
Buzzer PCB
INTELLIGENT EYE
sensor PCB
(R2783)
(R15508)

Si041142 Removal of Electrical Box / PCBs / Swing Motors
Removal Procedure 13
7Unfasten the 2 hooks
on the lower side, and
then the 2 hooks on the
upper side.
Remove the control
PCB.
[S1]: fan motor
[S6]: swing motor (horizontal
blades)
[S8]: swing motor (vertical
blades)
[S26]:buzzer PCB
[S28]:signal receiver PCB
[S32]:indoor heat exchanger
thermistor
[S35]:INTELLIGENT EYE
sensor PCB
Some models have no
harness for [S8].
Some models have no
INTELLIGENT EYE sensor
PCB or harness for [S35].
3. Remove the swing motor
for horizontal blades.
1Remove the screw of
the swing motor.
2Remove the swing
motor.
Step Procedure Points
Upper hook
Lower hook Control PCB
(R17129)
[S32] [S28]
[S26]
[S8]
[S6]
[S1]
[S35]
(R2697)
(R2787)
Swing motor
(R2788)

Removal of Electrical Box / PCBs / Swing Motors Si041142
14 Removal Procedure
4. Remove the swing motor
for vertical blades.
Some models have no swing
motor for vertical blades.
1Remove the swing shaft
on the right side.
Remove the swing shaft.
2Remove the 2 screws
and detach the swing
motor assembly.
3Remove the 2 screws
and remove the swing
motor.
The assembly has 6 hooks.
Step Procedure Points
(R2789)
(1) Unfasten the hook.
(2) Pull out the swing shaft.
(R12896)
Swing motor assembly
(R2791)
Hook
Hook Swing motor
(R2792)

Si041142 Removal of Indoor Heat Exchanger
Removal Procedure 15
5. 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 / PCBs /
Swing Motors”.
Caution
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.
Caution
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.
Place a plastic sheet under
the drain pan to prevent from
wetting the floor with
remaining drain.
If the drain hose is
embedded in the wall,
disconnect the drain hose
beforehand.
Carry out the removal works
with 2 wrenches.
When the pipings are
disconnected, protect both
the openings of pipe and unit
from entering of moisture.
1Hold the indoor unit up
with a piece of wood
etc.
2Pull out the drain hose.
3Unscrew the flare nut
for gas piping.
4Unscrew the flare nut
for liquid piping.
(R2793)
Drain hose
(R2794)
(R2795)
Liquid piping
Gas piping
(R2796)

Removal of Indoor Heat Exchanger Si041142
16 Removal Procedure
2. Remove the indoor unit.
1Detach the indoor unit
from the installation
plate.
3. Remove the indoor heat
exchanger.
1Unfasten the hook of
the piping fixture on the
back of the indoor unit.
2Slightly widen the
auxiliary piping.
Step Procedure Points
(R2797)
Piping fixture
(R2798)
Auxiliary piping
(R2799)

Si041142 Removal of Indoor Heat Exchanger
Removal Procedure 17
3Unfasten the hooks on
the left side. Caution
When removing or
reinstalling the indoor heat
exchanger, be sure to wear
protective gloves or wrap the
indoor heat exchanger with
cloths. (You may be injured
by the fins.)
4Push the hooks on the
right side and unfasten
them.
5Pull the indoor heat
exchanger to the front
side and unfasten the
hooks completely, and
then lift it.
Step Procedure Points
Hook
(R13231)
Hook
(R13232)
Indoor heat exchanger
(R2802)

Removal of Fan Motor / Fan Rotor Si041142
18 Removal Procedure
6. Removal of Fan Motor / Fan Rotor
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 right side
plate.
1Remove the 2 screws. You can remove the fan
rotor without detaching the
right side plate.
2Lift the right side plate
and remove it.
2. Remove the fan motor
and rotor.
1Remove the screw and
remove the fan motor
fixing plate.
2Remove the screw of
the fan rotor.
(R2803)
Right
side plate
(R2804)
Fan motor fixing plate
(R2805)
Fan rotor (R2806)