Daikin ARKC12RV2S User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
1.5/2.0/2.5/3.0/3.5 kW Class
9000/12000 Btu/h Class
Outdoor Unit
Inverter
Pair Type
Si001560EB

Service Manual
Removal Procedure
Outdoor Unit
zCooling Only zHeat Pump
ARKC09RV2S RXM20HVMV
ARKC12RV2S RXM25HVMV
RXM35HVMV
RKC09PV2S
RKC12PV2S RXP20HVLT
RXP25HVLT
RKC09QV2S RXP30HVLT
RKC12QV2S
RKC15PVM
RKC20PVM
RKC25PVM
RKC35PVM
RKC25QVM
RKC35QVM
RKC15PVM4
RKC20PVM4
RKC25PVM4
RKC35PVM4
RKC25QVM4
RKC35QVM4
RKC25PVMM
RKC35PVMM
RKC20PVMV
RKC25PVMV
RKC35PVMV
RKC25QVMV
RKC35QVMV

Si001560EB
Removal Procedure 1
Table of Contents
1. Outer Panels ...........................................................................................2
2. Outdoor Fan / Fan Motor.........................................................................4
3. Electrical Box ..........................................................................................6
4. PCB.......................................................................................................11
5. Thermistor ASSY ..................................................................................12
6. Reactor / Partition Plate ........................................................................13
7. Sound Blankets .....................................................................................14
8. Electronic Expansion Valve Coil / Four Way Valve...............................15
9. Compressor...........................................................................................18
Note: The illustrations may be slightly different depending on the model.
The illustrations are for heat pump models as representative.

Outer Panels Si001560EB
2Removal Procedure
1. Outer Panels
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1
2
Remove the screw of
the stop valve cover.
Pull down and remove
the stop valve cover.
When reassembling, make
sure to fit the 3 hooks.
3
4
Remove the 3 screws,
and then the top panel.
Remove the 6 screws
of the front panel.
Stop valve
cover
(R21285)
Hook
(R23311)
Front panel
Top panel
(R22381)

Si001560EB Outer Panels
Removal Procedure 3
5
6
Lift up the right side of
the front panel and
unfasten the 2 hooks.
Unfasten the 2 left side
hooks and remove the
front panel.
7 Press the 2 projections
from the rear side and
rotate the discharge
grille.
8 Unfasten the 6 hooks
and remove the
discharge grille.
Step Procedure Points
(R22382)
Rear side
Projection
(rear side)
Discharge grille
(R22383)
Hook
Hook (R22384)

Outdoor Fan / Fan Motor Si001560EB
4Removal Procedure
2. Outdoor Fan / Fan Motor
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 nut, and
then the outdoor fan.
Nut size: M6
When reassembling, align
the mark of the outdoor fan
with the D-cut section of the
motor shaft.
2
3
Disconnect the
connector [S70] or
[S71] depending on the
model.
Cut the clamp and
release the fan motor
lead wire from the
groove.
In case of [S71] models
[S70]/[S71]: fan motor
The location of the
connectors [S70] and [S71]
is different.
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.
Outdoor fan
Nut
D-cut
(R22385)
10 mm
(0.39 inch)
(R18954)
Groove Clamp
Fan motor lead wire [S70]
(R22386)
(R23995)
[S71]
Right View
Lead wire Outdoor fan
(R3249)

Si001560EB Outdoor Fan / Fan Motor
Removal Procedure 5
4 Remove the screw, and
then the fan motor
fixing frame.
When reassembling, fit the 2
lower hooks into the bottom
frame.
5 Unfasten the 2 hooks
on the fan motor fixing
frame and release the
fan motor lead wire.
6 Remove the 3 screws,
and then the fan motor.
Step Procedure Points
Fan motor fixing frame
(R22387)
(R10460)
Fan motor lead wire
Hook
(R22388)
Fan motor
(R22389)

Electrical Box Si001560EB
6Removal Procedure
3. Electrical Box
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1
2
Remove the 7 screws
on the terminal board
and disconnect the
connecting wire and
power supply wire.
Remove the 3 screws,
and then the wire
fixture.
3 Disconnect the
connector [S80].
[S80]: four way valve coil
The cooling only models
have no harness for [S80].
4 Disconnect the
connector [S20].
[S20]: electronic expansion
valve coil
Wire fixture
Power supply wire
Terminal board
Connecting
wire
(R22390)
[S80]
(R22391)
[S20]
(R22392)

Si001560EB Electrical Box
Removal Procedure 7
5 Disconnect the 2
connectors from the
reactor.
6 Disconnect the
connector [S30].
[S30]: compressor
7 Disconnect the
connector [S40].
[S40]: overload protector
Step Procedure Points
Reactor
Connector
(brown)
Connector
(orange)
(R22393)
[S30]
(R22394)
[S40]
(R22395)

Electrical Box Si001560EB
8Removal Procedure
8 Disconnect the
connector [S90] and
remove the clamp.
[S90]: thermistors
9 Remove the 2 screws
on the right side panel,
and then the screw on
the partition plate.
10 Lift up the terminal
board mounting plate
from the right side
panel.
Step Procedure Points
[S90] Clamp (R22396)
Partition
plate
Right side
panel
(R22397)
Terminal board mounting plate
(R22398)

Si001560EB Electrical Box
Removal Procedure 9
11 Lift up and remove the
electrical box together
with the terminal board
mounting plate.
When reassembling, make
sure to fit the rear hook.
12 Remove the outdoor
temperature thermistor
from the protection net
and from the slit.
When reassembling, make
sure to pass the outdoor
temperature thermistor
under the top part of the heat
exchanger first.
13 Lift up and remove the
protection net.
Step Procedure Points
Electrical box Terminal board mounting plate
(R22399)
Hook
(R22400)
Slit Protection net
Outdoor temperature
thermistor
(R23996)
Top part of the heat exchanger
(R22402)
Protection
net
(R21314)

Electrical Box Si001560EB
10 Removal Procedure
14 Remove the 3 screws.
15 Unfasten the 2 hooks
and remove the right
side panel.
When reassembling, make
sure to fit the rear hook.
Step Procedure Points
(R22403)
Hook
Right side
panel
(R22404)
Hook
(R21317)

Si001560EB PCB
Removal Procedure 11
4. PCB
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 2 earth/
ground screws.
Some models do not have a
ferrite core on the earth/
ground harness.
2
3
Remove the 3 screws
of the PCB.
Unfasten the 2 hooks
and remove the PCB.
When reassembling, make
sure to fit the 2 projections to
the PCB.
Earth/ground screw
(R23997)
Hook
PCB
Hook
(R22406)
Projection
(R22407)

Thermistor ASSY Si001560EB
12 Removal Procedure
5. Thermistor ASSY
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1 Pull out the discharge
pipe temperature
thermistor.
Be careful not to lose the
fixture for the thermistor.
2
3
Cut the clamp.
Pull out the outdoor
heat exchanger
thermistor and remove
the thermistor ASSY.
Some models have sound
blanket (back). Remove the
sound blanket (back)
beforehand.
Be careful not to lose the clip
for the thermistor.
Discharge pipe
temperature
thermistor
(R22408)
Fixture
(R20854)
Clamp
Outdoor heat exchanger
thermistor (R22409)
Thermistor ASSY (R22410)
(R20852)
Clip

Si001560EB Reactor / Partition Plate
Removal Procedure 13
6. Reactor / Partition Plate
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 2 screws
of the reactor.
2
3
Slide the reactor
upward to unfasten the
2 hooks.
Remove the reactor.
4 Remove the 2 screws,
and then the partition
plate.
When reassembling, fit the
hole on the partition plate to
the hook on the bottom
frame.
Reactor
(R22411)
Hook
(R22412)
Partition plate
(R22413)
Hook
(R22414)

Sound Blankets Si001560EB
14 Removal Procedure
7. Sound Blankets
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 sound
blanket (top).
Since the piping ports on the
sound blanket are torn
easily, remove the blanket
carefully.
Some models have 2 sound
blankets (top).
Some models have sound
blanket (back). Remove the
sound blanket (back)
beforehand.
2 Untie the 2 strings and
pull out the sound
blanket (outer).
3 Pull out the sound
blanket (inner).
Sound blanket (top)
(R22415)
Sound blanket (outer)
(R22416)
Sound blanket (inner)
(R22417)

Si001560EB Electronic Expansion Valve Coil / Four Way Valve
Removal Procedure 15
8. Electronic Expansion Valve Coil / Four Way Valve
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Be careful not to get yourself burnt with the pipes and other parts that are heated by
the gas brazing machine.
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 (248°F).) For the sake of
this, wrap the four way valve with wet cloth and provide water so that the cloth does not
dry.
Note 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.
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.
Be careful so as not to burn the compressor terminals, the name plate, the outdoor
heat exchanger fin.
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.
Step Procedure Points
1 Pull out the electronic
expansion valve coil.
Electronic
expansion
valve coil
(R23432)

Electronic Expansion Valve Coil / Four Way Valve Si001560EB
16 Removal Procedure
2 Remove the screw, and
then the four way valve
coil.
The cooling only models
have no four way valve.
3 Remove the terminal
cover.
4
5
Remove the protection
bushing.
Disconnect the
compressor lead wires
and the overload
protector.
Step Procedure Points
Four way valve coil
(R22419)
Terminal cover
(R22420)
W ( blue)
V (yellow)
U (red)
Overload protector
Protection
bushing
(R22421)

Si001560EB Electronic Expansion Valve Coil / Four Way Valve
Removal Procedure 17
6 Remove the putties. The position of the putties
varies depending on the
model.
7 Heat up the 4 brazed
parts and remove the
four way valve.
Step Procedure Points
Putty
Putty
(R22422)
Brazed part
Four way valve
Brazed
part
(R22423)

Compressor Si001560EB
18 Removal Procedure
9. Compressor
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Be careful not to get yourself burnt with the pipes and other parts that are heated by
the gas brazing machine.
If the refrigerant gas leaks during work, ventilate the room. (If the refrigerant gas is
exposed to flames, toxic gas may be generated.)
Since it may happen that the refrigerant oil in the compressor catches fire, prepare wet
cloth so as to extinguish fire immediately.
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.
Restore the piping by non-oxidation brazing.
Note 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.
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.
Be careful so as not to burn the compressor terminals, the name plate, the outdoor
heat exchanger fin.
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.
Step Procedure Points
1 Remove the terminal
cover. Terminal cover
(R22420)