Daikin CTXG25K2VMW User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
Indoor Unit
Inverter
Wall Mounted Type
2.5/3.5/5.0 kW Class
Si041256

Service Manual
Removal Procedure
Indoor Unit
zHeat Pump
CTXG25K2VMW
CTXG25K2VMS
CTXG35K2VMW
CTXG35K2VMS
CTXG50K2VMW
CTXG50K2VMS
FTXG25JV1BW
FTXG25JV1BA
FTXG35JV1BW
FTXG35JV1BA
FTXG50JV1BW
FTXG50JV1BA

Si041256
Removal Procedure 1
Table of Contents
1. Air Filters / Front Panel ...........................................................................2
2. Horizontal Blades ....................................................................................4
3. Front Grille ..............................................................................................5
4. Front Panel Mechanism ASSY................................................................7
5. Display Lens ASSY .................................................................................9
6. Reduction Motor / Limit Switch..............................................................10
7. Fan Guards / Electrical Box ..................................................................11
8. PCBs .....................................................................................................13
9. Swing Motors ........................................................................................16
10.Indoor Heat Exchanger .........................................................................17
11.Fan Rotor / Fan Motor...........................................................................20
12.Vertical Blade ASSYs............................................................................22
Note: The illustrations may be slightly different depending on the model.

Air Filters / Front Panel Si041256
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.
1Open the front panel.
2Keep the front panel
open with the support
plate.
3Remove the air filter. 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.
Be sure to insert the hooks
(at 2 lower positions) when
installing the air filter.
2. Remove the Titanium
apatite photocatalytic air-
purifying filter.
The Titanium apatite
photocatalytic air-purifying
filter is not marked for
difference between the right
and left sides.
1Remove the Titanium
apatite photocatalytic
air-purifying filter.
Front panel
(R12069)
(R12070)
Support plate
(R18232)
Air filter
Titanium apatite
photocatalytic air-
purifying filter
(R18168)

Si041256 Air Filters / Front Panel
Removal Procedure 3
3. Remove the front panel.
1Open the front panel.
2Release the front panel
locks on each side.
3Remove the front panel.
Step Procedure Points
(R12075)
(R12076)
Front panel lock
Right
(R12077)
Left
(R12078)

Horizontal Blades Si041256
4Removal Procedure
2. Horizontal Blades
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1Bend the horizontal
blade (large) slightly
and release the center
shaft.
2Release the left shaft.
3Slide the horizontal
blade (large) to the left
and release the right
shaft.
4Remove the horizontal
blade (small) likewise.
(R12079)
Horizontal blade
(large)
(R12080)
(R12081)

Si041256 Front Grille
Removal Procedure 5
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 2 screws
of the decoration panel
(right).
2Open the decoration
panel (right).
Unfasten the 3 hooks
and remove it.
3Remove the decoration
panel (left) in the same
way.
4Remove the screw and
remove the service
cover.
5Disconnect the relay
connector for the
reduction motor.
Decoration panel
(R12085)
(R12086)
(R12087)
Service cover
(R12088)
Relay connector

Front Grille Si041256
6Removal Procedure
6Open the 2 screw
covers with a flat
screwdriver.
7Remove the 4 screws.
8Unfasten the 3 hooks
on the top of the front
grille.
9Remove the front grille.
Step Procedure Points
Screw cover
(R12089)
(R12090)
(R12092)
Front grille
(R12093)

Si041256 Front Panel Mechanism ASSY
Removal Procedure 7
4. Front Panel Mechanism ASSY
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
of the front grille (right).
2Remove the guide
panel.
3Remove the front panel
mechanism ASSY
(right), holding the
shaft.
Remove the front panel
mechanism ASSY (left) in
the same way.
(R12094)
(R12095)
Guide panel
Front panel
mechanism ASSY
(R12096)
Shaft

Front Panel Mechanism ASSY Si041256
8Removal Procedure
4Remove the shaft
holder and the cover
shaft.
5Remove the shaft.
Step Procedure Points
Cover shaft
Shaft holder
(R12097)
(R12098)

Si041256 Display Lens ASSY
Removal Procedure 9
5. Display Lens ASSY
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1Remove the display
lens ASSY by turning it
counterclockwise.
2Unfasten the hook and
remove the cover.
Display lens ASSY
(R12102)
(R12103)
Cover

Reduction Motor / Limit Switch Si041256
10 Removal Procedure
6. Reduction Motor / Limit Switch
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1Cut the clamp of the
front panel mechanism
ASSY (right).
2Release the harness
from the 4 hooks.
3Pull out the terminals of
the limit switch.
4Remove the screw of
the reduction motor.
5Remove the reduction
motor by turning it
counterclockwise.
6Remove the limit
switch.
(R18169)
Hook
(R12106)
Limit switch
(R18170)
Reduction motor
Limit switch
(R12109)

Si041256 Fan Guards / Electrical Box
Removal Procedure 11
7. Fan Guards / 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. Remove the fan guards. Use a sharp tool such as an
awl to unfasten the lower
hooks.
1Unfasten the 2 hooks
and remove the fan
guard.
2. Remove the electrical
box.
1Remove the screw and
remove the drip proof
plate.
2Remove the screw and
release the earth wire.
Pull out the indoor heat
exchanger thermistor.
Fan guard
(R12110)
Drip proof plate
(R15283)
Earth wire
Indoor heat exchanger thermistor
(R12112)

Fan Guards / Electrical Box Si041256
12 Removal Procedure
3Remove the screws
and release the
connecting wires.
4Remove the screw and
remove the wire fixture.
5Remove the shield
plate.
6Disconnect the
connectors for the
swing motors [S41] and
for the fan motor
[S200].
7Release the harnesses.
8Remove the screw. There are 2 hooks on the
bottom frame. When
reassembling, fit the rear
side of the electrical box to
the hooks.
9Unfasten the 2 hooks
and remove the
electrical box.
Step Procedure Points
(R18233)
Wire fixture
Connecting wire
Shield plate
(R12114)
[S41]
[S200]
(R12115)
(R18171)
Electrical box
Hook

Si041256 PCBs
Removal Procedure 13
8. PCBs
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1Unfasten the 4 hooks
and remove the lamp
cover ASSY from the
electrical box.
2Unfasten the 3 hooks
and remove the signal
receiver / display PCB.
3Disconnect the
connectors for the
control PCB [S51] and
for the room
temperature thermistor
[S52].
[S51]: control PCB
[S52]: room temperature
thermistor
4Cut the clamp and
release the harness
from the hook.
5Unfasten the 3 hooks of
the sensor ASSY with a
flat screwdriver.
Lamp cover ASSY
(R12119)
(R18172)
Signal receiver /
display PCB
[S51]
[S52]
(R12124)
(R12126)
Sensor ASSY

PCBs Si041256
14 Removal Procedure
6Remove the sensor
ASSY.
7Disconnect the
connector [S36] from
the INTELLIGENT EYE
sensor PCB.
8Cut the clamp.
9Remove the shield
plate.
Step Procedure Points
(R18173)
Sensor
ASSY
[S36]
(R18234)
INTELLIGENT
EYE sensor PCB
(R12129)
Shield plate
(R12130)

Si041256 PCBs
Removal Procedure 15
10 Remove the screw of
the terminal board.
11 Pull out the terminals
and remove the
terminal board.
12 Release the harnesses
from the groove.
13 Release the harnesses
of the signal receiver /
display PCB.
r
14 Unfasten the 3 hooks
and remove the control
PCB.
Step Procedure Points
(R18174)
Terminal board
(R12133)
(R12134)
(R18175)
Control PCB
Hook
Hook

Swing Motors Si041256
16 Removal Procedure
9. Swing Motors
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
of the swing motor.
Connector color
Upper blade: white
Lower blade: red
2Remove the swing
motor.
Remove the other swing
motor in the same way.
(R12138)
Swing motor
for lower
(small) blade
Swing motor
for upper
(large) blade
(R12139)

Si041256 Indoor Heat Exchanger
Removal Procedure 17
10.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.
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.
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.)
Step Procedure Points
1. Disconnect the refrigerant
piping.
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.
When the pipings are
disconnected, protect the
both openings of pipe side
and unit side from entering
of moisture.
Carry out the removal work
with 2 wrenches.
1Remove the 2 screws
fixed to the installation
plate.
2Hold the indoor unit up
with a block.
3Disconnect the gas
piping and the liquid
piping.
(R12140)
(R12141)
Block

Indoor Heat Exchanger Si041256
18 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 at the
back of the indoor unit
and pull out the pipe.
2Slightly widen the
auxiliary pipe.
3Remove the 2 screws
on the left side of the
unit.
Step Procedure Points
Installation
plate
(R12142)
Piping fixture
(R12143)
(R12144)
(R12145)