Daikin FDXS25EV2C User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
Indoor Unit
Inverter
Duct Connected Type
2.5/3.5/5.0 kW Class
Si07-863

Service Manual
Removal Procedure
Indoor Unit
zHeat Pump
FDXS25EV2C
FDXS35EV2C
FDXS50EV2C
PDXS25EV2C
PDXS35EV2C

Si07-863
Removal Procedure 1
Table of Contents
1. Removal of Air Filter................................................................................2
2. Removal of PCB (Room Air Conditioner Type).......................................4
3. Removal of Drain Pan.............................................................................6
4. Removal of Heat Exchanger ...................................................................7
5. Removal of Fan Rotor / Fan Motor........................................................10
6. Removal of Drain Pump Cover .............................................................14
7. Removal of Drain Pump ........................................................................15
8. Removal of Heat Exchanger Thermistors .............................................18
Note: The illustrations may be slightly different depending on the model.

Removal of Air Filter Si07-863
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. Remove the air filter
Appearance
There are cases of rear
suction type and the bottom
suction type filters.
1Appearance
2. Remove the rear suction
type air filter
Rear suction type air filter
(The figure shows the view from the rear side.)
Details of the hook in the air
filter upper area
1Undo 2 top hooks and
pull the filter toward
your side.
2Lift up the filter and
undo the 2 bottom
hooks to remove the air
filter.
Details of the hook in the air
filter lower area
Top hooks

Si07-863 Removal of Air Filter
Removal Procedure 3
3. Remove the bottom
suction type air filter
Appearance (Bottom suction type air filter)
1Undo 2 hooks as shown
in the figure of the rear
suction type (previous
page).
2Undo the 2 positions in
the opposite side of the
hooks above. After that,
remove the air filter.
Step Procedure Points
Air filter

Removal of PCB (Room Air Conditioner Type) Si07-863
4Removal Procedure
2. Removal of PCB (Room Air Conditioner Type)
Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies
before disassembling work.
Step Procedure Points
1. Remove the electrical box
cover
1Remove the 2 screws
from the upper area.
2Lift up the electrical box
cover to undo the hooks
and remove the cover.
3Appearance of the
PCB. S1(White)
S21(White)
S7(White) S32(White) S26(White) Black White Red Green / Yellow

Si07-863 Removal of PCB (Room Air Conditioner Type)
Removal Procedure 5
2. Remove the PCB
1Pull the Faston
terminals out from the
terminal board with
pliers to remove them.
1: Black
2: White
3: Red
Earth cable: Green /
Yellow
2Disconnect the
connectors.
S1 (White): Fan motor
S7 (White): Fan motor
(For feedback)
S32 (White): Heat
exchanger thermistor
S26 (White): Photo
detector unit assembly
3Release the 3 bottom
hooks to remove the
PCB.
4Pull the lower part of
the PCB toward your
side and undo the 2 top
hooks.
5Remove the PCB.
Step Procedure Points
Black
White
Red
Green / Yellow
S1(White)
S7(White)
S32(White) S26(White)
Hooks
Hooks

Removal of Drain Pan Si07-863
6Removal Procedure
3. Removal of Drain Pan
Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies
before disassembling work.
Step Procedure Points
1. Remove the bottom plate
1Remove the 11 screws
from the bottom plate.
2Slide the bottom plate
to your side and
remove the plate.
2. Remove the drain pan
1Remove the drain
socket cap.
2Grip the drain socket
area with your right
hand.
3Support the drain pan
with your both hands to
lower the pan and
remove it.

Si07-863 Removal of Heat Exchanger
Removal Procedure 7
4. 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. Remove the heat
exchanger Warning
When any gas leakage is found,
repair the gas leakage points.
After that, collect all refrigerants
in the air conditioner, vacuum
dry the inside and then fill it with
refrigerant.
Warning
Do not entrain air or the like
other than the specified
refrigerant (R-410A) in the
refrigerating cycle. (If air is
entrained into the refrigerant
cycle, the inside of the
refrigerating cycle is
extraordinarily raised and will
cause an explosion or result in
injury.)
Caution
If any gas is leaked during the
operation, ventilate the room. (If
the refrigerant gas is exposed to
any flammable material, toxic
gas may occur.)
Caution
To prevent the heat exchanger
from dropping, be sure to
support it while you remove the
screws.
Make sure that the gases
are removed after the
pump down work. After
that, start the removal of
the heat exchanger.
Remove the drain pan
and the like before
starting the removal of the
heat exchanger.
1Cut one part in the
clamp to remove the
Faston terminal (earth
wire).
2Remove the 4 screws
from the heat
exchanger supporting
plate.
3Remove the heat
exchanger supporting
plate.
Heat exchanger
supporting plate

Removal of Heat Exchanger Si07-863
8Removal Procedure
4Cut one part in the
clamp in the heat
exchanger thermistor
area.
5Remove the heat
exchanger thermistor.
6Support the heat
exchanger to prevent it
from dropping while you
remove the 2 screws
from the left side of the
heat exchanger.
Note:
The Heat exchanger is fixed
with these 4 screws (2 in the
heat exchanger left side and
2 in the pipe line supporting
plate). Always support the
heat exchanger to prevent it
from dropping off while
removing the screws.
Step Procedure Points

Si07-863 Removal of Heat Exchanger
Removal Procedure 9
Appearance before the heat exchanger is removed
7Remove the 2 screws
from the refrigerant pipe
supporting plate.
8Slide the refrigerant
pipe supporting plate
downward to remove it.
9Remove the heat
exchanger.
Step Procedure Points
Heat exchanger
supporting plate
Refrigerant pipe supporting plate
Refrigerant pipe supporting plate

Removal of Fan Rotor / Fan Motor Si07-863
10 Removal Procedure
5. Removal of Fan Rotor / Fan Motor
Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies
before disassembling work.
Step Procedure Points
1. Remove the protective
grille
1Remove the 6 screws
from the guard net.
2Remove the guard net.
2. Remove the bottom plate
1Remove the 11 screws
from the bottom plate.
2Slide the bottom plate
to your side and
remove the plate.
Guard net
Guard net

Si07-863 Removal of Fan Rotor / Fan Motor
Removal Procedure 11
3. Remove the chamber
cover
1Remove the 4 screws
from the chamber
cover.
2Remove the chamber
cover.
4. Remove the fan housings
1Press the 2 hooks at
the fan assembly lower
part to undo the hooks.
2Bring the fan assembly
lower part down and
pull it to your side to
undo the inside hooks.
Step Procedure Points
Chamber cover
Fan assembly lower part
Hooks

Removal of Fan Rotor / Fan Motor Si07-863
12 Removal Procedure
3Remove the fan
assembly lower part.
(The procedure above
applies to both right and
left fan assembly.)
5. Remove the fan motor
1Cut 2 parts in the
clamp.
2Shift the glass tube.
3Disconnect the fan
motor cable connector.
4Disconnect the fan
motor connector.
Note:
When assembling the fan
motor, tighten the screws so
as to cover the notch.
Step Procedure Points
Glass tube
Fan motor cable connector
Fan motor connector

Si07-863 Removal of Fan Rotor / Fan Motor
Removal Procedure 13
5Remove the one screw
from the fan motor
fixing plate to remove
the both right and left
fan motors.
6. Remove the fan rotor Remark:
To remove the fan rotor, it is
necessary to remove the fan
rotor assembly.
1Remove the fan rotor
assembly.
2Insert a hexagonal
wrench key from the
notch in the fan,
remove the fan rotor
fixing screw and
remove the fan rotor.
Note:
When assembling the fan
rotor, align the rotor with the
D-cut.
Step Procedure Points
Fan motor fixing plate
D-cut
Notch

Removal of Drain Pump Cover Si07-863
14 Removal Procedure
6. Removal of Drain Pump Cover
Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies
before disassembling work.
Step Procedure Points
1. Remove the drain pump Remark:
It is not necessary to remove
the PCB before you remove
the drain pump.
1Remove the one screw
from the drain pump
cover.
2Move the drain pump
cover to the left and
remove it.
3You can check the float
switch, etc..

Si07-863 Removal of Drain Pump
Removal Procedure 15
7. Removal of Drain Pump
Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies
before disassembling work.
Step Procedure Points
1. Remove the bottom plate
1Remove the 11 screws
from the bottom plate.
2Slide the bottom plate
to your side to remove
it.
2. Remove the drain pan
1Remove the drain
socket cap.
2Hold the drain socket
area with your right
hand.
3Support the drain pan
with your both hands to
lower the drain pan,
and remove it.
3. Remove the drain pump
1Cut the clamp.
Clamp

Removal of Drain Pump Si07-863
16 Removal Procedure
2Pull the connector out.
(X8A, X25A)
3Cut the clamp for fixing
the rubber hose at the
pump discharge side.
4Pull the drain hose out.
5Remove the 3 screws.
Step Procedure Points

Si07-863 Removal of Drain Pump
Removal Procedure 17
6Hold the drain pump
and pull out the electric
wiring together with the
heat insulating material.
7Remove the drain
pump.
Step Procedure Points
Electric wiring
Heat insulating
material

Removal of Heat Exchanger Thermistors Si07-863
18 Removal Procedure
8. Removal of Heat Exchanger Thermistors
Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies
before disassembling work.
Step Procedure Points
1. Remove the heat
exchanger thermistors
1Cut 3 parts in the
clamp.
2Pull the earth terminal
out.
3Cut the clamp to
remove the 2
thermistors.