Daikin RXS25HV2C User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
2.5/3.2/3.5 kW Class
Outdoor Unit
Inverter
Pair Type
Si00-974

Service Manual
Removal Procedure
Outdoor Unit
zHeat Pump
RXS25HV2C
RXP25HV2C
RXP32HV2C
RXP35HV2C

Si00-974
Removal Procedure 1
Table of Contents
1. Removal of Outer Panels ........................................................................2
2. Removal of Outdoor Fan / Fan Motor .....................................................4
3. Removal of Electrical Box / PCBs ...........................................................6
4. Removal of Sound Blankets..................................................................14
5. Removal of Four Way Valve .................................................................16
6. Removal of Compressor .......................................................................19
Note: The illustrations may be slightly different depending on the model.

Removal of Outer Panels Si00-974
2Removal Procedure
1. Removal of Outer Panels
Procedure Warning Be sure to wait for 10 minutes or more after turning off all power
supplies before disassembling work.
Step Procedure Points
1. Appearance features
Take care not to cut your
finger by the fins of the
outdoor heat exchanger.
2. Remove the panels.
The stop valve cover is
united with the shield plate.
When reassembling, make
sure to fit the 3 hooks.
1Remove the screw of
the stop valve cover.
Pull down the stop
valve cover and remove
it.
(R10707)
(R15858)
(R10709)
Stop valve
cover
(R14606)
Shield plate
Hook

Si00-974 Removal of Outer Panels
Removal Procedure 3
2Remove the 3 screws
(right: 1 screw, left: 2
screws) and remove the
top panel.
3Remove the 5 screws
of the front panel.
4Lift up the left side and
unfasten the hooks.
5Unfasten the right side
hooks and remove the
front panel.
6
7
Remove the 4 screws
of the discharge grille.
Unfasten the 6 hooks
and remove the
discharge grille.
Step Procedure Points
(R10711)
Top panel
Front panel
(R10712)
(R10713)
(R10714)
Discharge grille

Removal of Outdoor Fan / Fan Motor Si00-974
4Removal Procedure
2. Removal of Outdoor Fan / 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 outdoor fan. Preparation
Remove the panels
according to the “Removal
of Outer Panels”.
Nut size: M6
1
2
Remove the nut of the
outdoor fan.
Remove the outdoor
fan.
When reassembling, align
the mark of the outdoor
fan with the D-cut section of
the motor shaft.
2. Remove the fan motor.
1Disconnect the
connector for the fan
motor [S70].
2Release the fan motor
lead wire from the
hooks.
3Remove the screw and
remove the fan motor
fixing frame.
Nut
Outdoor
fan
(R15848)
Shaft
D-cut
10 mm
(R12236)
(R7377)
[S70]
Fan motor lead wire
(R11957)
Fan motor fixing frame

Si00-974 Removal of Outdoor Fan / Fan Motor
Removal Procedure 5
4Release the fan motor
lead wire from the
hooks.
When reassembling, put the
fan motor lead wire through
the back of the fan motor so
as not to be entangled with
the outdoor fan.
5Remove the 3 screws
and remove the fan
motor.
Step Procedure Points
(R14724)
(R3249)
Lead wire Outdoor fan
(R14691)
Fan motor

Removal of Electrical Box / PCBs Si00-974
6Removal Procedure
3. Removal of Electrical Box / 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 right side
panel.
Preparation
Remove the panels
according to the “Removal
of Outer Panels”.
1Unhook the outdoor
temperature thermistor.
2Release the outdoor
temperature thermistor
from the groove.
3Remove the screws
and release the
connecting wires.
4Remove the 3 screws
and remove the wire
clamp.
(R15859)
Outdoor temperature thermistor
(R14781)
(R15860)
(R14783)
Wire
clamp

Si00-974 Removal of Electrical Box / PCBs
Removal Procedure 7
5Remove the screw on
the rear side of the right
side panel.
6Remove the 4 screws
on the right side panel.
7Unfasten the hook on
the rear side.
When reassembling, make
sure to fit the hook.
Step Procedure Points
(R15861)
Right
side
panel
(R11762)
Hook
(R11763)

Removal of Electrical Box / PCBs Si00-974
8Removal Procedure
8Unfasten the hook
above the electrical
box.
9Unfasten the hook, and
remove the right side
panel.
2. Remove the electrical box.
1Disconnect the
connector for the four
way valve coil [S80].
2Disconnect the
connector for the
overload protector
[S40].
Step Procedure Points
(R14787)
(R11764)
Right
side
panel
Hook
(R7388)
[S80]
[S40]
(R7389)

Si00-974 Removal of Electrical Box / PCBs
Removal Procedure 9
3Disconnect the
connector for the
electronic expansion
valve coil [S20].
4Detach the clamp of the
lead wire for the
electronic expansion
valve coil.
5Disconnect the relay
connector for the
compressor.
Pay attention so as not to
lose the fixture for the
thermistor.
When reassembling, do not
insert the thermistor up to
the dent of fixture.
6Release the discharge
pipe thermistor.
Step Procedure Points
[S20]
(R7390)
Clamp
(R7391)
(R7392)
Dent
Fixture
Discharge pipe thermistor (R7393)

Removal of Electrical Box / PCBs Si00-974
10 Removal Procedure
7Pull out the outdoor
heat exchanger
thermistor.
Pay attention so as not to
lose the clip for the
thermistor.
8Cut the clamp.
9Unfasten the hook from
the partition plate with a
flat screwdriver.
The electrical box can be
removed by lifting itself
without a screwdriver.
10 Lift and remove the
electrical box.
Step Procedure Points
Outdoor heat exchanger thermistor
(R7394)
Clip
(R7395)
Clamp
(R7318)
(R11236)
Electrical box

Si00-974 Removal of Electrical Box / PCBs
Removal Procedure 11
3. Remove the main PCB.
1Remove the screw on
the terminal board.
2Cut the clamp.
3Remove the 2 screws
of the earth wire.
4Disconnect the 2
terminals of the reactor.
Step Procedure Points
(R15865)
Terminal board
Main PCB
(R15866)
(R15867)
Reactor
Brown White (R15868)

Removal of Electrical Box / PCBs Si00-974
12 Removal Procedure
5Remove the 3 screws
to remove the reactor.
6Disconnect the
connector for the
thermistors [S90].
7Remove the 6 screws.
8Disconnect the 3
connectors for the filter
PCB [S10] [HL3] [HN3].
Step Procedure Points
Reactor
(R15862)
[S90]
(R15863)
Main PCB
(R15864)
[S10]
[HN3]
[HL3]
(R15849)

Si00-974 Removal of Electrical Box / PCBs
Removal Procedure 13
9Unfasten the 2 hooks.
10 Lift and remove the
main PCB.
11 Feature of the main
PCB
[S10] [HL3] [HN3]: filter PCB
[S20]: electronic expansion
valve coil
[S40]: overload protector
[S70]: fan motor
[S80]: four way valve coil
[S90]: thermistors
Step Procedure Points
(R15869)
(R13200)
[S70]
[S10]
[S80][HN3]
[S40]
[S20]
[HL3]
[S90]

Removal of Sound Blankets Si00-974
14 Removal Procedure
4. Removal of Sound Blankets
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 partition
plate.
1Remove the 2 screws.
2The partition plate has
a hook on the lower
side. Lift and pull the
partition plate and
remove it.
When reassembling, fit the
lower hook into the bottom
frame.
(R15870)
Hook
(R11793)
Partition
plate

Si00-974 Removal of Sound Blankets
Removal Procedure 15
2. Remove the sound
blankets.
Since the piping ports on the
sound blanket are torn
easily, remove the blanket
carefully.
1Lift and remove the
sound blanket (top).
2Pull the sound blankets
(outer, inner 2) out.
3Pull the sound blanket
(inner 1) out.
Step Procedure Points
Sound blanket (top)
(R15882)
(R15883)
Sound blanket
(inner 2)
Sound blanket
(outer)
Sound blanket (inner 1)
(R15871)

Removal of Four Way Valve Si00-974
16 Removal Procedure
5. Removal of Four Way Valve
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 peripheries.
There are 2 hooks at the
inner side of the terminal
cover.
1Remove the screw and
remove the four way
valve coil.
2Remove the terminal
cover.
3Disconnect the lead
wires of the
compressor.
Four way valve coil (R7412)
Terminal cover
(R7413)
(R12653)
U
V
W
(R7414)
U(red)
V(yellow)
W(blue)

Si00-974 Removal of Four Way Valve
Removal Procedure 17
4Remove the electronic
expansion valve coil.
5Remove the putty.
Step Procedure Points
(R7415)
Electronic
expansion
valve coil
Putty (R7416)

Removal of Four Way Valve Si00-974
18 Removal Procedure
Before working, make
sure that the refrigerant
gas is empty in the circuit.
Be sure to apply nitrogen
replacement when
heating up the brazed
part.
Warning
Be careful not to get yourself
burnt with the pipes and other
parts that are heated by the
gas brazing machine.
Warning
If the refrigerant gas leaks
during work, ventilate the
room. (If the refrigerant gas is
exposed to flames, toxic gas
may be generated.)
Caution
From the viewpoint of global
environment protection, do
not discharge the refrigerant
gas in the atmosphere. Make
sure to collect all the
refrigerant gas.
Cautions for restoration
1. Restore the piping by non-
oxidation brazing.
2. It is required to prevent the
carbonization of the oil inside
the four way valve and the
deterioration of the gaskets
affected by heat. (Keep
below 120°C.) For the sake
of this, wrap the four way
valve with wet cloth and
provide water so that the
cloth does not dry.
In case of difficulty with gas
brazing machine
1. Disconnect the brazed part
where is easy to disconnect
and restore.
2. Cut pipes on the main unit
with a tube cutter in order to
make it easy to disconnect.
2. Remove the four way
valve.
1Heat up the brazed part
(a) and withdraw the
piping with pliers.
2Heat up the 3 brazed
parts of the four way
valve. Disconnect the
point (b) first.
3Disconnect the points
(c) and (d).
Note:
Do not use a metal saw
for cutting pipes by all
means because the
sawdust comes into the
circuit.
When withdrawing the
pipes, be careful not to
pinch them firmly with
pliers. The pipes may get
deformed.
Provide a protective sheet
or a steel plate so that the
brazing flame cannot
influence peripheries.
Step Procedure Points
(R7418)
(a)
(R7419)
(R7420)
(d)
(c)(b)