Daikin FTY25GXV1 User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
Indoor Unit
Non-Inverter
Wall Mounted Type
2.5/3.5 kW Class
Si04-859

Service Manual
Removal Procedure
Indoor Unit
zHeat Pump
FTY25GXV1
FTY35GXV1
FTYN25GXV1B
FTYN35GXV1B

Si04-859
Removal Procedure 1
Table of Contents
1. Removal of Air Filter................................................................................2
2. Removal of Front Panel ..........................................................................4
3. Removal of Front Grille ...........................................................................5
4. Removal of Horizontal / Vertical Blades and Safety Net .........................7
5. Removal of Electrical Box .....................................................................10
6. Removal of PCB / Swing Motor.............................................................14
7. Removal of Heat Exchanger .................................................................18
8. Removal of Fan Rotor ...........................................................................21
9. Exchange of Drain Hose .......................................................................24
Note: The illustrations may be slightly different depending on the model.

Removal of Air Filter Si04-859
2Removal Procedure
1. Removal of Air Filter
Procedure Warning Be sure to wait 10 minutes or more after turning off all power
supplies before disassembling work.
Step Procedure Points
1. Appearance feature
Warning
Dangerous: High voltage
A high voltage is applied to
all the electric circuits of this
product including
thermistors.
When a signal from the
remote controller is
received, the receiving tone
sounds and the operation
lamp flickers immediately to
confirm the signal reception.
2. Removing the air filter
1Put your fingers on the
right and left projections
of the front panel, and
open the panel to the
position where it will
stop.
2Slightly push up the
knob at the center of
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.
Insert the air filter with the
“FRONT”-marked face up.
Be sure to insert the hooks
(at 2 lower positions) when
mounting the air filter.
Room temperature thermistor
(R8566)
Signal receiver
(R8567)
Operation
lamp
TIMER
lamp
ON/OFF switch
(Test run switch)
(
R8568
)
Hooks (R8569)

Si04-859 Removal of Air Filter
Removal Procedure 3
3Pull out the air filter
downwards and remove
it.
3. Removing the air purifying
filter
1The air purifying filter is
attached to the back of
the air filter.
2Remove the air
purifying filter frame by
bending the air filter
and unfastening the
projections from the air
filter frame.
3Remove the air
purifying filter from its
frame (at 5 positions)
by bending it.
To prevent the damage, do
not remove the flame when
cleaning the filter.
The shape of filter varies
depending on the model.
The air-purifying filter is not
marked for difference
between the right and left
sides.
Step Procedure Points
(R8570)
Air filter
(R8636)
Air purifying
filter
Projections
(R8026)
Hook
(R8027)

Removal of Front Panel Si04-859
4Removal Procedure
2. Removal of Front Panel
Procedure Warning Be sure to wait 10 minutes or more after turning off all power
supplies before disassembling work.
Step Procedure Points
1Open the front panel
over the position where
it will stop.
Preparation
Remove the air filter
according to the “Removal
of Air Filter”.
2Slide the right rotary
shaft to the left and
release it.
The rotary shaft on the each
side can be removed easily
by sliding each shaft
inwards.
3Slide the left rotary
shaft to the right and
release it.
4Remove the front panel. Caution on Mounting
When mounting the front
panel, fit the right and left
rotary shafts one by one into
the grooves and fully push
them in position.
Left side
Right side
(R8571)
Right side Rotary shaft
(R8572)
Left side Rotary shaft
(R8029)
(R8573)

Si04-859 Removal of Front Grille
Removal Procedure 5
3. Removal of Front Grille
Procedure Warning Be sure to wait 10 minutes or more after turning off all power
supplies before disassembling work.
Step Procedure Points
1. Removing the service
cover
1Remove the screw of
the service cover.
Preparation
Remove the front panel
according to the “Removal
of Front Panel”.
No field setting switch is
inside it.
You can remove the front
grille without detaching the
service cover.
2Pull out the service
cover diagonally down
in the direction of the
arrow.
2. Removing the front grille
1Remove the 2 screws,
in the right and the left,
which fix the main body
with the front grille.
2Undo the 3 hooks on
the top of the front
grille.
The front grille has 3
hooks on the center
and the both sides of
the upper part.
Refer to the removal
procedure in a reverse way
when reassembling.
(R8574)
(R8575)
Service cover
(R8576)
(R8577)
Hooks

Removal of Front Grille Si04-859
6Removal Procedure
3Press each hook, and
also lift the grille up to
unfasten the hooks.
4Pull the upper part of
the front grille towards
yourself.
5Lift the lower part up,
and then remove the
front grille.
Caution on Mounting
When mounting the front
grille, make sure that the
hooks are fastened as they
were.
Step Procedure Points
Left Center Right
(R8030)
(R8578)
Left Center
Front grille
Right
(R8579)

Si04-859 Removal of Horizontal / Vertical Blades and Safety Net
Removal Procedure 7
4. Removal of Horizontal / Vertical Blades and Safety
Net
Procedure Warning Be sure to wait 10 minutes or more after turning off all power
supplies before disassembling work.
Step Procedure Points
1. Removing the horizontal
blade (large)
1Open the horizontal
blade.
2Unfasten the center
fixing shaft while
bending the horizontal
blade slightly.
Cautions on Mounting
The center fixing shaft can
be removed easily by
bending the blade.
Cautions on Mounting
1. Since key pattern hook is
provided, rotate the blades
and fit it to the right pivot
first.
2. Fit the blades to the center
and left pivots.
3Unfasten the left fixing
shaft of the horizontal
blade.
4Unfasten the right fixing
shaft of the horizontal
blade.
(R8580)
Horizontal blade
(R8581)
(R7993)
(R7995)
Key
Left Right

Removal of Horizontal / Vertical Blades and Safety Net Si04-859
8Removal Procedure
5Remove the horizontal
blade.
2. Removing the safety net
1Unfasten the hooks at
the lower part with a flat
screwdriver.
2Unfasten the hooks at
the upper 2 positions.
3Remove the safety net
toward yourself.
Repeat the same procedure
to remove the safety net on
the other side.
Step Procedure Points
(R8582)
(R8583)
(R8584)
(R8585)

Si04-859 Removal of Horizontal / Vertical Blades and Safety Net
Removal Procedure 9
3. Removing the vertical
blade
Six vertical blades are
united as a set.
(It is impossible to replace
only one blade.)
The set of blades is not
marked for difference
between right and left.
1Unfasten the hooks at
the upper 2 positions.
2Unfasten the 3 hooks at
the shaft mounting part
by pressing them with a
flat screwdriver.
3Remove the vertical
blade toward yourself.
Repeat the same procedure
to remove the vertical blade
on the other side.
Step Procedure Points
Hooks
(R8586)
(R8587)
(R8588)
(R8589)

Removal of Electrical Box Si04-859
10 Removal Procedure
5. Removal of Electrical Box
Procedure Warning Be sure to wait 10 minutes or more after turning off all power
supplies before disassembling work.
Step Procedure Points
1. Disconnect the connecting
wires
Preparation
Remove the front grille
according to the “Removal
of Front Grille”.
1The figure shows the
connections of wire
harnesses.
2Remove the screw of
the electric wire
retaining plate.
The thermal fuse is a part of
the terminal board.
3Loosen the screws of
the terminal board and
disconnect the
connecting wires.
4Pull out the heat
exchanger thermistor.
Terminal board Electrical box
Electric wire retaining plate
(R8590)
(R8591)
Terminal board
(
R8592
)
(R8593)
Heat exchanger thermistor

Si04-859 Removal of Electrical Box
Removal Procedure 11
2. Remove the electrical box.
1Disconnect the earth
wire by removing the
screw.
2Disconnect the
connector of the fan
motor [CN_FANFB].
3Disconnect the
connector of the swing
motor [CN_STP].
4Disconnect the
connector of the fan
motor [CN_FAN].
Step Procedure Points
(R8594)
(R8595)
[CN_FANFB]
(R8596)
[CN_STP]
(R8597)
[CN_FAN]

Removal of Electrical Box Si04-859
12 Removal Procedure
5Remove the fixing
screw of the electrical
box.
6Remove the screw of
cable fixture for
thermistor cable.
7Disconnect the
connecting wire for
thermistor cable.
Step Procedure Points
(R8598)
(
R8599
)
(R8600)
Thermistor cable
(outdoor unit side)

Si04-859 Removal of Electrical Box
Removal Procedure 13
8Pull the electrical box
towards yourself.
9When mounting, fit the
position of the hook and
the groove.
There are a groove and a
hook on the rear side.
Step Procedure Points
(R8601)
(R8602)
Hook

Removal of PCB / Swing Motor Si04-859
14 Removal Procedure
6. Removal of PCB / Swing Motor
Procedure Warning Be sure to wait 10 minutes or more after turning off all power
supplies before disassembling work.
Step Procedure Points
1. Removing the shelter Preparation
Remove the electrical box
according to the “Removal
of Electrical Box”.
1To remove the shelter
(1), unfasten the hooks
at the upper 2 positions
of the shelter.
2Unfasten the hook at
the lower position, and
remove the shelter (1).
3Lift the shelter (2) and
unfasten the 2 hooks.
4Slide the shelter (2),
and remove.
(R8603)
Hooks
Shelter (1)
Hook
(R8604)
(R8605)
Hooks
Shelter (2)

Si04-859 Removal of PCB / Swing Motor
Removal Procedure 15
5Disconnect the wire
harnesses with pliers.
2. Removing the display
PCB
Preparation
Remove the electrical box
according to the “Removal
of Electrical Box”.
1Lift the lower part of the
display PCB to remove.
2Disconnect the
connector [CN_MB]
from the display PCB.
3The figure shows the
names of the display
PCB component parts.
Step Procedure Points
(R8606)
(R8607)
ON/OFF switch
TIMER lamp
Signal receiver
[CN_MB]
Operation lamp
(R8608)

Removal of PCB / Swing Motor Si04-859
16 Removal Procedure
4Disconnect the three
connectors.
[CN_DISP]:
To display PCB
[CN_ODCOIL]:
To outdoor unit thermistor
[CN_TBTF]:
To terminal fuse
5To remove the control
PCB, unfasten the 2
hooks at the upper part
from the rear side.
6Lift up the upper part of
the control PCB, and
remove.
7The figures show the
names of the control
PCB component parts.
[CN_STP] To swing motor
[CN_DISP] To display PCB
[CN_FANFB], [CN_FAN] To fan
motor
Step Procedure Points
[CN_DISP]
[CN_ODCOIL]
[CN_TBTF] (R8609)
(R8610)
(R8611)
(R8612)
[CN_FAN]
[CN_STP]
[CN_FANFB]
[CN_
DISP]
FUSE 1
(3.15 A /
250 V)

Si04-859 Removal of PCB / Swing Motor
Removal Procedure 17
3. Removing the swing motor
1Remove the screw of
the swing motor.
2Disconnect the
connector.
Step Procedure Points
(R8613)
Swing motor
(R8614)
(R8615)

Removal of Heat Exchanger Si04-859
18 Removal Procedure
7. Removal of Heat Exchanger
Procedure Warning Be sure to wait 10 minutes or more after turning off all power
supplies before disassembling work.
Step Procedure Points
1. Disconnecting the
refrigerant pipe
Preparation
Remove the electrical box
according to the “Removal
of Electrical Box”.
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 being operated
and the stop valve being
open, air may be sucked in to
generate an over-pressure in
refrigeration cycle, thus
resulting in pipe rupture or
accidental injury.
If the drain hose is
embedded in the wall,
disconnect the drain hose
beforehand.
1Remove the screws
which fix the heat
exchanger to the
installation plate.
2Lift the indoor unit by a
wooden base.
3Place a plastic sheet
under the drain pan to
prevent from wetting
the floor with remaining
drain.
4Unscrew the flare nut
for gas piping by 2
wrenches.
Caution
From the point of view of
environmental protection, be
sure to use a vacuum pump
for air purging.
(
R8616
)
(R8617)
Wooden base
Drain hose (option)
Extension drain hose
Connecting wires (3 leads)
(R8016)
(R8017)