Daikin RKJ09NV1S User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
Outdoor Unit
Inverter
Pair Type
2.0/2.5/3.5/4.2 kW Class
9000/12000/15000 Btu/h Class
Si001273EC

Service Manual
Removal Procedure
Outdoor Unit
zCooling Only zHeat Pump
RKJ09NV1S ARXS20G4V1B
RKJ12NV1S ARXS25G4V1B
ARXS35G4V1B
RKJ25NVM
RKJ35NVM RXG25K3V1B
RXG35K3V1B
RKJ25NVM4
RKJ35NVM4 RXG20L2V1B
RXG25L2V1B
RKJ25NVMG RXG35L2V1B
RKJ35NVMG
RXS20K3V1B
RKJ25NVMV RXS25K3V1B
RKJ35NVMV RXS35K2V1B
RKM09NV2S RXS35L2V1B
RKM12NV2S
RKM15NV2S
RKM25NVMG
RKM35NVMG
RKM42NVMG
RKM25PVMG
RKM35PVMG
RKM42PVMG
RKV25NVM
RKV35NVM
RKV25NVM4
RKV35NVM4
RKV25NVMV
RKV35NVMV

Si001273EC
Removal Procedure 1
Table of Contents
1. Outer Panels ...........................................................................................2
2. Fan Motor................................................................................................4
3. Electrical Box ..........................................................................................6
4. PCBs .......................................................................................................8
5. Reactor / Partition Plate ........................................................................13
6. Sound Blankets .....................................................................................14
7. Four Way Valve.....................................................................................15
8. Compressor...........................................................................................18
Note: The illustrations may be slightly different depending on the model.
The illustrations are for heat pump models as representative.

Outer Panels Si001273EC
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 the stop
valve cover and remove
it.
The stop valve cover has 5
hooks. When reassembling,
make sure to fit all the 5
hooks.
3
4
5
Remove the 2 screws
and remove the top
panel.
Remove the drip proof
plate.
Remove the 4 screws
and remove the
discharge grille.
Some models have one
more screw on the front of
the top panel.
The discharge grille has 4
hooks.
6Remove the 8 screws
and remove the front
panel.
The front panel has 4 hooks.
Stop
valve
cover
(R17214)
(R20194)
Discharge
grille
Drip proof plate
Top panel
(R7193)
(R11825)
Front panel
(R7195)
Hook

Si001273EC Outer Panels
Removal Procedure 3
7
8
9
Remove the 6 screws.
Release the outdoor
temperature thermistor.
Lift up the guard net
and remove it.
Take care not to cut your
finger by the fins of the
outdoor heat exchanger.
10
11
Remove the screw of
the right side panel.
Lift up the right side
panel and remove it.
When reassembling, make
sure to fit the hooks on the
right and rear side.
Step Procedure Points
(R20686)
Outdoor temperature thermistor
Guard net
(R20687)
Hook
Right side
panel
(R20688)
Hook

Fan Motor Si001273EC
4Removal Procedure
2. 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
2
Remove the nut of the
outdoor fan.
Remove the outdoor
fan.
Nut size: M6
When reassembling, align
the mark of the outdoor
fan with the D-cut section of
the motor shaft.
3Release the outdoor
temperature thermistor.
4Disconnect the
connector [S70].
[S70]: fan motor
5Release the fan motor
lead wire from the hook.
(R11828)
D-cut
10 mm
(0.39 inch)
(R18954)
(R11829)
Outdoor temperature
thermistor
(R16678)
[S70]
(R11832)
Fan motor
lead wire

Si001273EC Fan Motor
Removal Procedure 5
6Remove the screw and
remove the fan motor
fixing frame.
When reassembling, fit the
lower hooks into the bottom
frame.
7Open the 2 hooks and
release the fan motor
lead wire.
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.
8Remove the 4 screws
and remove the fan
motor.
Step Procedure Points
(R11833)
Fan motor fixing frame
(R7206)
(R11835)
(R3249)
Lead wire Outdoor fan
(R12311)
Fan motor

Electrical Box Si001273EC
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
1Disconnect the
connector [S80].
[S80]: four way valve coil
Cooling only models have
no harness for [S80].
2Disconnect the
connector [S20].
[S20]: electronic expansion
valve coil
3Disconnect the 2
connectors for the
reactor.
When reassembling, you
can reconnect the 2
connectors in either way
regardless of the color.
4Disconnect the relay
connector for the
compressor.
[S80]
(R17144)
(R17476)
[S20]
(R18727)
(R18728)

Si001273EC Electrical Box
Removal Procedure 7
5Disconnect the
connector for the
overload protector
[S40].
When reassembling,
connect the connectors in
the following order.
(1) [S40]
(2) relay connector for
compressor
(3) reactor
(4) [S20]
(5) [S70]
(6) [S80]
6
7
Cut the clamp.
Pull out the outdoor
heat exchanger
thermistor.
Be careful not to lose the
clip for the thermistor.
8Release the discharge
pipe thermistor.
Be careful not to lose the
fixture for the thermistor.
9Lift and remove the
electrical box.
Step Procedure Points
(R18729)
[S40]
(R18730)
Outdoor heat
exchanger
thermistor (R3264)
Clip
Discharge pipe thermistor (R11849)
(R18789)
Fixture
(R20192)
Electrical box

PCBs Si001273EC
8Removal Procedure
4. PCBs
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 main PCB
and the forced operation
button PCB.
You can remove the main
PCB without removing the
electrical box by
disconnecting the lead wires
on the terminal board.
1Remove the screw on
the terminal board.
2Release the 2 earth /
ground wires.
3Pull out the forced
operation button PCB.
Disconnect the
connector [S110] to
remove the forced
operation button PCB.
Be careful of a sharp
protrusion at the back of the
forced operation button
PCB.
[S110]: main PCB
(R11854)
Terminal
board
(R20181)
Earth /
ground wire
Forced operation button PCB
(R13742)
[S110]

Si001273EC PCBs
Removal Procedure 9
4Disconnect the
selective connector for
standby electricity
saving and pull out the
relay connector.
5Cut the clamp.
6Release the harness.
7
8
Cut the clamps at the 2
locations.
Disconnect the
connector [S10].
[S10]: filter PCB
Step Procedure Points
(R13507)
Selective connector
Relay
connector
(R11858)
(R11859)
(R18731)
[S10]

PCBs Si001273EC
10 Removal Procedure
9Disconnect the
connectors [S50]
[S100].
[S50]: magnetic relay
[S100]: forced operation button
PCB
10 Disconnect the
connectors [HL3]
[HN3].
[HL3] [HN3]: filter PCB
11 Release the harnesses
from the hook.
12 Release the harness for
the outdoor
temperature thermistor.
Step Procedure Points
(R11862)
[S100]
[S50]
[HL3]
[HN3]
(R11863)
(R11864)
(R11865)

Si001273EC PCBs
Removal Procedure 11
13
14
Remove the 7 screws.
Unfasten the 4 hooks
and remove the main
PCB.
2. Remove the filter PCB.
1Release the harnesses
from the hook.
2Cut the clamp.
Step Procedure Points
(R20689)
(R11869)
Filter PCB
(R11871)
Clamp

PCBs Si001273EC
12 Removal Procedure
3Release the harnesses
from the hook.
4Release the harnesses
from the 2 hooks.
5Remove the screw.
6
7
Unfasten the 2 hooks.
Lift and remove the
filter PCB.
Step Procedure Points
Hook
(R11872)
(R11873)
(R11874)
(R11876)
Filter PCB

Si001273EC Reactor / Partition Plate
Removal Procedure 13
5. 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 reactor.
1Remove the screw and
remove the reactor.
2. Remove the partition
plate.
1Remove the 2 screws.
2The partition plate has
2 hooks on the lower
side. Lift and pull the
partition plate to
remove it.
When reassembling, fit the
lower hooks into the bottom
frame.
(R11879)
Reactor
(R12273)
Partition plate
(R13508)
Hook

Sound Blankets Si001273EC
14 Removal Procedure
6. 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
2
Remove the sound
blanket (top).
Remove the sound
blanket (outer).
Since the piping ports are
torn easily, remove the
sound blankets carefully.
3Remove the sound
blanket (inner).
4Pull out the sound
blanket (bottom).
Some models have a sound
blanket (back).
Sound blanket
(top)
(R18733)
Sound blanket
(outer)
(R11887)
Sound blanket
(inner)
Sound blanket
(bottom)
(R11888)

Si001273EC Four Way Valve
Removal Procedure 15
7. 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
1Pull out the electronic
expansion valve coil.
Cooling only models have no
four way valve.
(R7233)
Electronic
expansion
valve coil

Four Way Valve Si001273EC
16 Removal Procedure
2Remove the terminal
cover.
3Disconnect the lead
wires of the compressor
and the overload
protector.
4Remove the screw and
remove the four way
valve coil.
Step Procedure Points
(R7234)
Terminal cover
V
W
U
(R20182)
Red (U)
Yellow (V) Blue (W)
Overload
protector
(R20193)
Four way valve coil

Si001273EC Four Way Valve
Removal Procedure 17
5Remove the sheets of
putty.
6Heat up the 4 brazed
parts and remove the
four way valve.
Step Procedure Points
(R7248)
(R20183)
Four way valve
(R7250)

Compressor Si001273EC
18 Removal Procedure
8. 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
1Remove the 2 nuts of
the compressor.
2Heat up the brazed part
of the discharge side
pipe and disconnect it.
Compressor
(R11889)
(R20690)
Discharge side
pipe