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