Daikin Super Multi NX FVXS35FV1B User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
Indoor Unit
Inverter
Floor Standing Type
2.5/3.5/4.5/5.0 kW Class
9000/12000/15000/18000 Btu/h Class
Si061262EE

Service Manual
Removal Procedure
Indoor Unit
zHeat Pump
FVXS25FV1B
FVXS35FV1B
FVXS50FV1B
FVXS25KV1A
FVXS35KV1A
FVXS45LV1A
FVXS50KV1A
FVXS25RV1A
FVXS35RV1A
FVXS45RV1A
FVXS09NVJU
FVXS12NVJU
FVXS15NVJU
FVXS18NVJU

Si061262EE
Removal Procedure 1
Table of Contents
1. Air Filters / Front Panel / Front Grille.......................................................2
2. Horizontal Blade......................................................................................5
3. Electrical Box ..........................................................................................6
4. PCBs .......................................................................................................9
5. Vertical Blade ASSYs............................................................................13
6. Indoor Heat Exchanger .........................................................................16
7. Fan Rotor / Fan Motor...........................................................................17
Note: The illustrations may be slightly different depending on the model.

Air Filters / Front Panel / Front Grille Si061262EE
2Removal Procedure
1. Air Filters / Front Panel / 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 Unfasten the 2 hooks
on the top and open the
front panel.
Slide the right and the left
hooks toward the center to
unfasten them.
2 Unfasten the 2 upper
hooks of the air filter.
When installing the air filter,
make sure the 4 hooks are
securely fastened.
3 Pull the air filter up and
remove it.
Front panel (R22133)
(R22134)
Hook
Hook (R22135)
Air filter
(R22136)

Si061262EE Air Filters / Front Panel / Front Grille
Removal Procedure 3
4 Release the 4
projections and remove
the Titanium apatite
deodorizing filter ASSY
from the air filter.
5
6
Release the 4 hooks
and remove the
Titanium apatite
deodorizing filter from
the frame.
Remove the other
Titanium apatite
deodorizing filter ASSY
in the same way.
7 Release the string from
the hook.
8 Release the 3 hooks of
the bottom of the front
panel and remove the
front panel.
When installing the front
panel, catch the 3 hooks of
the front grille and hitch the
string to prevent the front
panel from dropping.
Step Procedure Points
Air filter
(R24290)
Projection Projection
Titanium apatite deodorizing
filter ASSY
Hook Hook
Frame
Titanium apatite deodorizing filter
(R24291)
Hook
Front grille
(R24292)
Hook
Front panel (R22749)

Air Filters / Front Panel / Front Grille Si061262EE
4Removal Procedure
9 Remove the 4 screws
from the front grille.
10 Pull the front grille to
remove.
There are 3 hooks on the top
of the main unit.
11 Slide the operation
panel cover to the left
and remove it.
When reassembling, make
sure that all the 4 hooks at
the back are fastened.
Step Procedure Points
(R22141)
Hook
Front grille
(R22750)
Operation panel cover
(R22143)
Hook
(R22144)

Si061262EE Horizontal Blade
Removal Procedure 5
2. 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
2
Open the horizontal
blade.
Release the center
shaft.
3 Bend the horizontal
blade to release the left
shaft.
4 Release the right shaft
and remove the
horizontal blade.
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.
Horizontal blade
(R22145)
Left
shaft
(R24276)
Right shaft
(R24277)

Electrical Box Si061262EE
6Removal Procedure
3. 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 Unfasten the hook and
lift the sensor PCB
fixing plate.
2 Remove the 2 screws
and detach the earth/
ground wires.
3 Remove the front shield
plate.
Hook
Sensor
PCB
fixing plate
(R22148)
Earth/ground wire
(yellow/green)
Earth/ground
wire (green)
(R24278)
Front shield plate
(R22150)

Si061262EE Electrical Box
Removal Procedure 7
4
5
Remove the screw,
unfasten the hook and
remove the wire fixture.
Remove the 4 screws
from the terminal board
and remove the
connecting wire.
For U.S. models
When reassembling, make
sure that the connecting wire
is passed through the
conduit hole at the bottom of
the unit.
When reassembling, make
sure to fasten the hook
before tightening the screw
of the wire fixture.
6 Disconnect the
connectors [S1], [S41]
and [S42].
[S1]: fan motor
[S41]: lower air outlet motor
[S42]: swing motor
Step Procedure Points
Wire fixture
Terminal
board
Connecting
wire
(R22151)
Conduit
Lock nut
Conduit
mounting
plate
Back view
(R24392)
Hook
Wire
fixture (R22152)
[S42]
[S41]
[S1]
(R22153)

Electrical Box Si061262EE
8Removal Procedure
7 Remove the screw of
the electrical box.
8 Pull out the electrical
box.
9 Pull out the indoor heat
exchanger thermistor.
Be careful not to lose the clip
of the thermistor.
Step Procedure Points
Electrical box
(R22154)
Electrical box
(R22155)
Indoor heat exchanger
thermistor
(R22156)
Clip
(R11268)

Si061262EE PCBs
Removal Procedure 9
4. 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 shield plate.
1 Pull out the clamp for
the earth/ground wires.
2 Unfasten the 8 hooks
and remove the shield
plate.
2. Remove the sensor PCB.
[S49]: control PCB
1
2
Unfasten the 2 hooks of
the sensor PCB.
Disconnect the
connector [S49] and
remove the sensor
PCB.
Clamp
Left view
(R24389)
Hook
Hook
Hook
Shield plate
(R22158)
Hook
[S49]
Sensor
PCB
(R22159)

PCBs Si061262EE
10 Removal Procedure
3. Remove the service PCB.
1 Cut the clamp.
2 Unfasten the 2 hooks
and open the lamp
cover.
Unfasten the left hook first.
3 Unfasten the 2 hooks of
the service PCB.
Step Procedure Points
Clamp
Left view
(R24390)
Hook
Lamp cover
(R22161)
Display
PCB
Service
PCB
(R22162)
Hook
Service
PCB
(R22163)

Si061262EE PCBs
Removal Procedure 11
4 Disconnect the
connector [S27] and
remove the service
PCB.
[S27]: control PCB
4. Remove the display PCB.
1 Unfasten the 2 hooks of
the display PCB.
2 Disconnect the
connector [S47] and
remove the display
PCB.
[S47]: control PCB
5. Remove the control PCB.
1 Disconnect all the 5
terminals.
Step Procedure Points
[S27]
(R22164)
Hook
(R22165)
Display PCB
[S47]
(R22166)
Black
White
Red Earth/ground (yellow/green)
Earth/ground
(green)
(R24279)

PCBs Si061262EE
12 Removal Procedure
2 Remove the 2 screws.
3 Unfasten the hook and
remove the control
PCB.
Step Procedure Points
Control
PCB
(R22168)
Hook
(R22169)

Si061262EE Vertical Blade ASSYs
Removal Procedure 13
5. 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 vertical blade
ASSYs (upper).
1 Remove the 2 screws,
and then the air outlet
ASSY.
The air outlet ASSY has 2
vertical blade ASSYs.
2
3
Unfasten the 2 hooks
and the center hook to
remove the vertical
blade ASSY.
Remove the other
vertical blade ASSY in
the same way.
4 Slide the protection net
along the groove and
remove it.
Air outlet ASSY
(R22170)
Vertical blade ASSY
(R22171)
Hook
Center hook
(R22172)
Groove
Protection net
(R22173)

Vertical Blade ASSYs Si061262EE
14 Removal Procedure
5 Remove the 2 screws
and pull out the swing
motor.
6 Disconnect the
connector and remove
the swing motor.
2. Remove the vertical blade
ASSYs (lower).
1 Remove the 2 screws.
2
3
Remove the drain hose.
Release the lower air
outlet motor harness
from the hook.
Place a plastic sheet around
the drain pan to prevent
wetting the floor with
remaining drain.
If embedded in the wall, the
drain hose can be
disconnected from the back
of the indoor unit.
Step Procedure Points
Swing motor
(R22174)
(R22175)
(R22176)
Hook
Drain hose
Lower air outlet motor harness
(R22177)

Si061262EE Vertical Blade ASSYs
Removal Procedure 15
4 Pull out the drain pan
ASSY.
5
6
Remove the motor
cover.
Remove the 2 screws,
and then the lower air
outlet motor.
When reassembling, make
sure that the 7 hooks on the
motor cover are securely
fastened.
7 Remove the damper.
8 Unfasten the 2 hooks
from the drain pan and
remove the vertical
blade ASSY.
Step Procedure Points
Drain pan ASSY
(R22178)
Lower air outlet motor
Motor cover (R22179)
Hook
Hook
(R22180)
Damper
(R22181)
Hook
Vertical blade ASSY
(R22751)

Indoor Heat Exchanger Si061262EE
16 Removal Procedure
6. 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 Release the 2 hooks
and remove the piping
fixture.
When reassembling, make
sure that the 2 hooks are
securely fastened.
2 Release the flared joint
of the liquid pipe and
the gas pipe.
3
4
Unfasten the 2 hooks
on the left side of the
indoor heat exchanger.
Unfasten the 2 hooks
on the right side and
remove the indoor heat
exchanger.
Hook
Piping fixture
(R22183)
Hook
(R22184)
(R22185)
Hook Hook
Hook
Left Right
Indoor heat
exchanger
(R24391)

Si061262EE Fan Rotor / Fan Motor
Removal Procedure 17
7. 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 fan rotor.
1 Remove the 4 screws
and remove the
bellmouth.
2 Remove the nut, and
then the fan rotor.
Nut size: M6
When reassembling, align
the mark of the fan rotor
with the D-cut section of the
motor shaft.
2. Remove the fan motor.
1 Release the fan motor
harness from the 2
hooks.
Bellmouth
(R22188)
Fan rotor
Nut
D-cut
(R22189)
10 mm
(0.39 inch)
(R18954)
Fan motor harness
Hook
(R22190)

Fan Rotor / Fan Motor Si061262EE
18 Removal Procedure
2 Remove the 3 screws,
and then the fan motor
cover.
Some models have the
earth/ground wire attached
with the fan motor cover
screw.
When reassembling, make
sure the earth/ground wire is
within the fan motor cover
line.
3
4
Unfasten the 2 hooks to
remove the harness
retainer.
Remove the fan motor.
There is no hook around the
fan motor. Be careful not to
drop it when the harness
retainer is removed.
3. Remove the casing. Press the 2 hooks toward
the back side and remove
the casing.
1 Remove the 3 screws
and unfasten the 2
hooks to remove the
upper casing.
2 Remove the 4 screws
and unfasten the 4
hooks to remove the 2
casings.
Press the 4 hooks toward
the back side and remove
the 2 casings.
Step Procedure Points
Fan motor
cover
Earth/ground
wire (R24280)
(R22753)
Fan motor
Hook
Harness retainer
(R22192)
Hook Upper casing
(R24281)
Hook
Hook
Casing (R22194)