Daikin FVXG25K2V1B User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
Indoor Unit
Inverter
Floor Standing Type
2.5/3.5/5.0 kW Class
Si061263

Service Manual
Removal Procedure
Indoor Unit
zHeat Pump
FVXG25K2V1B
FVXG35K2V1B
FVXG50K2V1B

Si061263
Removal Procedure 1
Table of Contents
1. Front Panel..............................................................................................2
2. Air Filters .................................................................................................3
3. Front Grille ASSY....................................................................................4
4. Electrical Box / PCBs ..............................................................................5
5. Horizontal Blade....................................................................................12
6. Swing Motor ..........................................................................................13
7. Radiant Panel........................................................................................14
8. Air Outlet ASSY.....................................................................................17
9. Drain Pan / Indoor Heat Exchanger ASSY............................................19
10.Fan Rotor / Fan Motor...........................................................................23
Note: The illustrations may be slightly different depending on the model.

Front Panel Si061263
2Removal Procedure
1. Front Panel
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1Open the front panel.
2Release the strings
from the hooks.
When reassembling, hang
the strings on the hooks.
3Unfasten the 3 lower
hooks and remove the
front panel.
Front panel
(R15016)
Lock
Open
Front panel
stopper
(R15017)
Hook
(R15018)

Si061263 Air Filters
Removal Procedure 3
2. Air Filters
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1Pull down and remove
the air filters (upper).
2Pull up and remove the
air filters (lower).
3Remove the Titanium
apatite photocatalytic
air-purifying filter from
the rear side of the air
filter (lower).
To prevent the damage, do
not remove the Titanium
apatite photocatalytic air-
purifying filter from the frame
when cleaning it.
(R15019)
Air filter (upper)
(R15020)
Air filter (lower)
(R15021)
Titanium apatite
photocatalytic
air-purifying filter
(R15022)

Front Grille ASSY Si061263
4Removal Procedure
3. Front Grille 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 5 screws.
2Unfasten the 3 lower
hooks and remove the
front grille ASSY
3Remove the 2 screws
to remove the side
panel (right).
4Remove the 2 screws
to remove the side
panel (left).
5Remove the 3 screws
to remove the suction
grille.
(R15023)
(R15024)
Front grille
ASSY
Hook
(R15025)
Suction grille
Side panel
(right)
Side panel
(left)
Front grille

Si061263 Electrical Box / PCBs
Removal Procedure 5
4. Electrical Box / 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 electrical
box.
1Remove the screw of
the service cover and
remove it.
2Remove the 4 screws
and disconnect the
connecting wires.
3Remove the screw and
remove the wire fixture.
4Disconnect the relay
connector for the indoor
electronic expansion
valve coil.
Upper: for fan motor
Lower: for indoor electronic
expansion valve coil
5Disconnect the relay
connector for the fan
motor.
6Remove the 3 screws.
Service cover
(R18225)
1
2
3
Wire fixture
Screw
(R18226)
Connecting wires
(R18227)
Relay
connector for
fan motor
Relay connector for indoor
electronic expansion valve coil
1
2
3
(R18362)

Electrical Box / PCBs Si061263
6Removal Procedure
2. Remove the main PCB.
1Remove the 2 screws.
2Remove the electrical
box cover.
3Disconnect the
connectors.
[S6]: swing motor
[S26]: service PCB
[S30]: indoor electronic
expansion valve coil
[S32]: indoor heat exchanger
thermistor
[S33]: room temperature
thermistor
[S34]: radiant panel thermistors
[S46]: display PCB
4Release the harnesses
from the 2 hooks.
Step Procedure Points
(R15034)
(R15035)
Electrical box cover
(R18229)
[S32] [S33] [S34] [S26] [S46]
[S30]
[S6]
Hook

Si061263 Electrical Box / PCBs
Removal Procedure 7
5Disconnect the
connector [FG] [S1]
[S2].
6Unfasten the 2 hooks
and remove the main
PCB.
3. Remove the service PCB.
1Unfasten the hook.
2Disconnect the
connector [S27] and
remove the service
PCB.
[S27]: for main PCB
4. Remove the terminal
board ASSY.
1Remove the screw.
Step Procedure Points
(R18228)
Hook
[S1] [FG]
[S2]
[FG]: earth / ground
[S1]: fan motor
[S2]: terminal board
(R15043)
Hook
[S27]
Service
PCB
(R18230)
(R15047)

Electrical Box / PCBs Si061263
8Removal Procedure
2Unfasten the hook and
remove the terminal
board ASSY.
3Unfasten the hook and
remove the terminal
board cover.
4Release the harnesses
from the hook.
5Cut the clamp.
6Unfasten the 2 hooks of
each connector. Pull
out the 2 relay
connectors.
Upper (brown): fan motor
Lower (red): indoor electronic
expansion valve
Step Procedure Points
Hook
(R18231)
Terminal
board ASSY
(R18265)
Hook
Terminal board
cover
(R18266)
Hook
Clamp
(R15052)
Hook

Si061263 Electrical Box / PCBs
Removal Procedure 9
7Release the 4 terminals
and remove the
terminal board ASSY.
5. Remove the display PCB. Use a piece of cloth to
protect the surface of the
indoor unit.
1Remove the screw
cover (right) with a flat
screwdriver.
2Remove the 2 screws.
3Remove the service
cover.
4Disconnect the relay
connector for the
display PCB.
Step Procedure Points
(R15053)
(R18268)
Screw cover
(right)
(R15058)
Service cover
(R18269)
Relay connector for
the display PCB

Electrical Box / PCBs Si061263
10 Removal Procedure
5Remove the screw
cover (left) with a flat
screwdriver and
remove the screw.
Use a piece of cloth to
protect the surface of the
indoor unit.
6Unfasten the 8 hooks.
7Remove the air outlet
cover ASSY.
8Turn over the air outlet
cover ASSY and cut the
clamp.
9Release the harnesses
from the hooks.
Step Procedure Points
(R18270)
Screw cover (left)
(R15287)
Air outlet cover ASSY
(R15061)
(R18271)
Hook

Si061263 Electrical Box / PCBs
Removal Procedure 11
10 Lift up the cover of the
lamp cover ASSY with
a flat screwdriver and
open the cover.
11 Unfasten the hook and
remove the display
PCB.
12 Disconnect the
connector [S56].
[S56]: main PCB
Step Procedure Points
Lamp
cover ASSY
(R15064)
Hook
(R15066)
Display PCB
Hook
[S56]
(R18272)

Horizontal Blade Si061263
12 Removal Procedure
5. Horizontal Blade
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1Open the horizontal
blade.
2Bend the horizontal
blade and unfasten the
center shaft.
3Unfasten the left shaft.
4Unfasten the right shaft
and remove the
horizontal blade.
(R18314)
Horizontal blade
(R15070)
(R15071)

Si061263 Swing Motor
Removal Procedure 13
6. Swing Motor
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
and remove the swing
motor.
2Remove the shaft.
3Unfasten the hook and
disconnect the
connector.
(R15072)
Shaft
(R15074)
(R18363)
Connector

Radiant Panel Si061263
14 Removal Procedure
7. Radiant Panel
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1Remove the screw.
2Unfasten the 2 hooks
and remove the drip
proof cover.
3Release the room
temperature thermistor
from the drip proof
cover.
4Disconnect the
connecting sections of
the 2 pipings for the
radiant panel.
When the pipings are
disconnected, protect the
both openings from entering
moisture.
(R15076)
Drip
proof
cover
(R15077)
Hook
(R18315)
Room temperature
thermistor
Clamp
(R15078)

Si061263 Radiant Panel
Removal Procedure 15
5Remove the 2 lower
screws on the right and
left side of the radiant
panel.
6Remove the 2 upper
screws on the right and
left side of the radiant
panel.
7Remove the radiant
panel.
8Turn over the radiant
panel.
9Remove the 2 screws
on the left and remove
the left panel.
10 Remove the 2 screws
on the right and remove
the right panel.
Step Procedure Points
Radiant
panel
(R15081)
(R15082)
(R18302)
Left
panel
(R18303)
Right panel

Radiant Panel Si061263
16 Removal Procedure
11 Remove the screw and
remove the piping
fixture.
M4 × 16
12 Remove the single
union fixture.
13 Remove the screw.
14 Remove the cover
thermal insulation
ASSY (small).
15 Remove the 8 screws
and remove the cover
thermal insulation
ASSY (large).
16 Remove the 2 screws
and remove the
mounting plate (right).
17 Remove the 2 screws
and remove the
mounting plate (left).
Step Procedure Points
(R18304)
Piping fixture
Single union
fixture
(R18305)
Cover thermal insulation ASSY
(small) (R15090)
Cover thermal insulation ASSY (large)
Mounting plate (right) Mounting plate (left)
(R15091)

Si061263 Air Outlet ASSY
Removal Procedure 17
8. Air Outlet ASSY
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1Disconnect the relay
connector for the swing
motor.
2Remove the 4 screws.
3Remove the air outlet
ASSY.
4Remove the 3 screws
of the air outlet ASSY.
(R18306)
(R15094)
(R15135)
Air outlet ASSY
(R15097)

Air Outlet ASSY Si061263
18 Removal Procedure
5Turn over the air outlet
ASSY and remove the
3 screws.
6Remove the sub air
outlet ASSY.
7Remove the 3 screws
of the sub air outlet
ASSY.
8Turn over the sub air
outlet ASSY and
remove the 3 screws.
9Unfasten the 4 hooks
and release the hook of
the upper air outlet
ASSY from the interlock
rod.
Step Procedure Points
(R15098)
(R15288)
Sub air outlet ASSY
(R15100)
(R15101)
Lower air outlet
ASSY
Upper air outlet ASSY
Hook
(R18326)
Interlock rod
Hook
Hook