Daikin Super Multi NX FVXS25FV1B User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
Indoor Unit
Inverter
Floor Standing Type
2.5/3.5/5.0 kW Class
Si06-759

Service Manual
Removal Procedure
Indoor Unit
zCooling Only zHeat Pump
FVXS25FV1B FVXS25FV1A
FVXS35FV1B FVXS35FV1A
FVXS50FV1B FVXS50FV1A
FVXS25FV1B
FVXS35FV1B
FVXS50FV1B

Si06-759
Removal Procedure 1
Table of Contents
1. Removal of Air Filter / Front Panel / Front Grille .....................................2
2. Removal of Horizontal Blade...................................................................6
3. Removal of Electrical Box .......................................................................7
4. Removal of PCBs....................................................................................9
5. Removal of Vertical Blades ...................................................................13
6. Removal of Indoor Heat Exchanger......................................................16
7. Removal of Fan Rotor / Fan Motor........................................................17
Note: The illustrations may be slightly different depending on the model.

Removal of Air Filter / Front Panel / Front Grille Si06-759
2Removal Procedure
1. Removal of Air Filter / Front Panel / 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. Features
2. Remove the front panel.
(R6768)
Slide the right and the left
hooks to the center.
1 Unfasten the 2 hooks
on the top of the front
panel.
(R6765)
Operation lamp Timer lamp
(R6766)
Indoor Unit
[ON/OFF] button
Front panel
(R6767)

Si06-759 Removal of Air Filter / Front Panel / Front Grille
Removal Procedure 3
2 Open the front panel.
3 Press the 2 hooks of
the top of the air filter
downward and
unfasten them.
4 Pull the air filter up and
remove it.
Step Procedure Points
String
(R11496)
Hook
(R11497)
(R11498)
Air filter

Removal of Air Filter / Front Panel / Front Grille Si06-759
4Removal Procedure
5 Release the string from
the hook.
6 Release the 3 hooks of
the bottom of the front
panel and remove the
front panel.
When installing the air filter,
catch the 2 hooks of the front
grille.
When installing the front
panel, catch the 3 hooks of
the front grille and hitch the
string to prevent the front
panel from dropping.
7 Remove the 4 screws
from the front grille.
Step Procedure Points
(R6772)
Hook for the air filter
Hook for the front panel
Front grille
(R17116)
(R6774)

Si06-759 Removal of Air Filter / Front Panel / Front Grille
Removal Procedure 5
8 Pull the front grille to
your side to remove.
There are 3 hooks on the top
of the main unit.
Step Procedure Points
(R6775)

Removal of Horizontal Blade Si06-759
6Removal 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
1
2
Open the horizontal
blade.
Release the center
shaft.
3 Bend the horizontal
blade to release the
right and the left shafts
and remove the
horizontal blade.
Release the left shaft first
and then release the right
shaft from the key alignment.
Horizontal blade
(R6778)
(R6779)
Key alignment
(R6780)

Si06-759 Removal of Electrical Box
Removal Procedure 7
3. 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
2
Remove the 2 earth
wire screws.
Unfasten the hook and
lift the sensor PCB
fixing plate.
3 Remove the front
shield plate.
4 To detach the
connection wires,
remove the screw
from the wiring
fixture and remove
the 4 screws from
the terminal board.
Sensor PCB fixing plate
Hook
(R14973)
Earth wire
screw
Front shield plate
(R6782)
Wiring fixture
(R6783)
Terminal
board
Connection
wires

Removal of Electrical Box Si06-759
8Removal Procedure
5 Disconnect the
3 connectors
[S1] [S41] [S42].
[S1] : fan motor
[S41]: lower air outlet motor
[S42]: swing motor
6 Remove the screw of
the electrical box.
7 Pull out the electrical
box.
8 Pull out the indoor heat
exchanger thermistor.
Step Procedure Points
[S42]
[S41]
[S1]
(R6784)
(R6785)
Electrical
box
(R6786)
(R6787)
Indoor heat
exchanger
thermistor

Si06-759 Removal of PCBs
Removal Procedure 9
4. Removal of 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.
1 Unfasten the 8 hooks
of the shield plate and
remove it.
2. Remove the sensor PCB.
1 Unfasten the 2 hooks
of the sensor PCB.
2 Disconnect the
connector [S49] and
remove the sensor
PCB.
Hook
Hook
Hook
Shield plate
(R14751)
Hook
(R14752)
Sensor
PCB
[S49]
(R6789)

Removal of PCBs Si06-759
10 Removal Procedure
3. Remove the service PCB. Unfasten the left hook first.
1 Unfasten the 2 hooks
of the lamp cover.
2 Unfasten the 2 hooks
of the service PCB.
3 Disconnect the
connector [S27] and
remove the service
PCB.
Step Procedure Points
Hook
Lamp cover
(R6790)
(R6791)
Service
PCB
Display
PCB
Hook
Service PCB
(R14983)
(R6793)
[S27]

Si06-759 Removal of PCBs
Removal Procedure 11
4. Remove the display PCB.
1 Unfasten the 2 hooks
of the display PCB.
2 Disconnect the
connector [S47] and
remove the display
PCB.
5. Remove the control PCB.
1 Cut the clamp and pull
out all the terminals
from the terminal
board.
2 Disconnect the
connectors [S26] [S46]
[S48].
[S26]: service PCB
[S46]: display PCB
[S48]: sensor PCB
Step Procedure Points
Hook
(R14753)
Display PCB
[S47]
(R6797)
Terminal
Clamp
(R6798)
[S48]
[S26]
[S46]
(R6799)
Control PCB

Removal of PCBs Si06-759
12 Removal Procedure
3 Remove the 2 screws.
4 Remove the control
PCB.
Step Procedure Points
Screw
Screw
(R6800)
(R6801)
[S1] [S41] [S42] [S26]
[S48]
[S46]
(R14974)

Si06-759 Removal of Vertical Blades
Removal Procedure 13
5. Removal of 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 vertical blade
(upper).
1 Remove the 2 screws
and remove the air
outlet ASSY.
2 The air outlet ASSY
has the 2 vertical
blades ASSYs.
3 Unfasten the 2 hooks
and the center hook to
remove the vertical
blades ASSY.
4 Slide the protection net
along the right and the
left grooves and
remove it.
Screw Screw
Air outlet ASSY
(R6803)
Vertical blades ASSY
(R6804)
Center hook
Hook
(R14755)
Groove
Protection net
(R6806)

Removal of Vertical Blades Si06-759
14 Removal Procedure
5 Remove the 2 screws
to remove the swing
motor.
2. Remove the vertical blade
(lower).
Be careful not to wet the
floor with drained water.
1 Remove the 2 screws.
2 Remove the drain hose
and release the harness
of the lower air outlet
motor from the hook.
Step Procedure Points
Swing motor
(R6807)
Shaft
(R6808)
(R6809)
Hook
Drain hose
(R6810)

Si06-759 Removal of Vertical Blades
Removal Procedure 15
3 Pull out the drain pan
ASSY.
4 Remove the motor
cover.
Remove the 2 screws
to remove the lower air
outlet motor.
5 Remove the damper.
6 Remove the sealing
material from the
front of the vertical
blades ASSY,
unfasten the 2 hooks
from the drain pan,
and remove the
vertical blades
ASSY.
Step Procedure Points
(R6811)
Drain pan
ASSY
(R6812)
Motor cover
Lower air outlet motor
Damper
(R6813)
Hook
(R14756)
Vertical blades ASSY

Removal of Indoor Heat Exchanger Si06-759
16 Removal Procedure
6. 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
Make sure that the
refrigerant gas is removed
after the pump down
work.
Caution
When removing or
reassembling the indoor heat
exchanger, be sure to wear
gloves or wrap the indoor
heat exchanger with cloth
before proceeding to the
work. (You may be injured by
the fins.)
1 Release the flared
joint of the liquid pipe
and the gas pipe
using 2 wrenches.
2 Remove the piping
fixture.
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.
(R11499)
(R11502)
Piping fixture
(R9994)
Right
hook
Left
hook
Hook
Hook
(R11501)
Hook
(R14975)
Indoor heat
exchanger

Si06-759 Removal of Fan Rotor / Fan Motor
Removal Procedure 17
7. Removal of Fan Rotor / Fan Motor
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 fan rotor.
1 Remove the 4 screws
and remove the
bellmouth.
2 Remove the nut to
remove the fan rotor.
Nut size: M6
2. Remove the fan motor.
1 Release the harness of
the fan motor from the
hook.
2 Remove the 3 screws
and remove the fan
motor cover.
Bellmouth
(R6820)
Nut
Fan rotor
(R6821)
10 mm
(R12236)
Hook
(R6822)
(R11503)
Fan motor
cover

Removal of Fan Rotor / Fan Motor Si06-759
18 Removal Procedure
3 Unfasten the 2 hooks
to remove the harness
retainer and remove
the fan motor.
3. Remove the casing. Press the 2 hooks toward
the back side and remove
the casing.
1 Remove 3 screws and
unfasten the 2 hooks to
remove the upper
casing.
2 Remove 2 screws and
unfasten the 2 hooks to
remove the right casing
or the left casing.
Press the 2 hooks toward
the back side and remove
the casing.
Step Procedure Points
Hook
Fan motor
(R14976)
Harness
retainer
Hook
(R14758)
Hook
Hook
(R14759)