Daikin ARKC18RV2S User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
4.2/5.0/6.0 kW Class
18000/24000 Btu/h Class
Outdoor Unit
Inverter
Pair Type
Si001413EB

Service Manual
Removal Procedure
Outdoor Unit
zCooling Only
ARKC18RV2S
ARKC24RV2S
RKC18NV2S
RKC24NV2S
RKC50NVM
RKC60NVM
RKC50NVM4
RKC60NVM4
RKC50NVMV
RKC60NVMV
RKJ18NV1S
RKJ42NVMG
RKJ50NVM
RKJ50NVM4
RKJ50NVMV
RKM18NV2S
RKM24NV2S
RKM50PVMG
RKM60PVMG
RKV50NVM
RKV60NVM
RKV50NVM4
RKV60NVM4
RKV50NVMV
RKV60NVMV

Si001413EB
Removal Procedure 1
Table of Contents
1. Outer Panels ...........................................................................................2
2. Outdoor Fan / Fan Motor.........................................................................4
3. Electrical Box ..........................................................................................6
4. PCB.......................................................................................................10
5. Partition Plate / Sound Blankets............................................................12
6. Electronic Expansion Valve...................................................................14
7. Compressor...........................................................................................16
Note: The illustrations may be slightly different depending on the model.

Outer Panels Si001413EB
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 4 screws
and remove the top
panel.
Remove the 4 screws
of the discharge grille.
3 Slide the discharge
grille upward and
remove it.
The discharge grille has 6
hooks.
4 Remove the 6 screws
of the front panel.
Discharge grille
Top panel
(R20302)
(R20303)
Hook
Hook
Front panel
(R20304)

Si001413EB Outer Panels
Removal Procedure 3
5
6
Unfasten the right side
hook.
Unfasten the 3 left side
hooks and remove the
front panel.
7
8
Remove the screw of
the stop valve cover.
Pull down the stop
valve cover to unfasten
the hooks and remove
it.
The stop valve cover has 6
hooks.
Step Procedure Points
(R20305)
Stop valve cover (R20306)
(R20307)

Outdoor Fan / Fan Motor Si001413EB
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 top shield
plate.
2
3
Cut the clamp.
Disconnect the
connector [S70] and
release the fan motor
lead wire from the
groove.
[S70]: fan motor
Top shield plate
(R23351)
(R20540)
Clamp
[S70]
Groove Fan motor
lead wire

Si001413EB Outdoor Fan / Fan Motor
Removal Procedure 5
4 Remove the nut and
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.
5
6
7
Remove the 2 screws
of the fan motor fixing
frame.
Pull up the fan motor
fixing frame to unfasten
the 2 hooks at the
bottom.
Remove the fan motor
fixing frame.
When reassembling, fit the 2
lower hooks into the bottom
frame.
8 Unfasten the 2 hooks
and release the fan
motor lead wire.
9 Remove the 4 screws
and remove the fan
motor.
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.
Step Procedure Points
Nut
Outdoor fan
(R20312)
10 mm
(0.39 inch)
(R18954)
(R20668)
Fan motor
fixing frame
(R20314)
Hook
(R22019)
Fan motor (R20316)
(R3249)
Lead wire Outdoor fan

Electrical Box Si001413EB
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 Remove the 2 screws
and remove the side
shield plate.
2
3
Remove the 3 screws
and remove the wire
fixture.
Remove the 7 screws
on the terminal board
and disconnect the
connecting wire and
power supply wire.
4 Remove the earth /
ground screw on the
right side panel.
Side shield plate
(R23352)
Wire fixture
Connecting wire
Power supply
wire
(R20318)
Terminal
board
Earth / ground
wire
Right side panel
(R20670)

Si001413EB Electrical Box
Removal Procedure 7
5 Release the outdoor
temperature thermistor
from the protection net.
6 Remove the 4 screws
of the right side panel.
7 Unfasten the 3 hooks
and remove the right
side panel.
Step Procedure Points
Outdoor temperature thermistor
Protection
net
(R20671)
Right side panel (R20321)
Hook
Hook (R20322)

Electrical Box Si001413EB
8Removal Procedure
8
9
Cut the clamp.
Pull out the outdoor
heat exchanger
thermistor.
Be careful not to lose the clip
for the thermistor.
10 Disconnect the
connector [S40] and
pull out the clamp.
[S40]: overload protector
11 Disconnect the
connector [S20] and
remove the clamp.
[S20]: electronic expansion
valve coil
Step Procedure Points
Outdoor heat
exchanger
thermistor
Clamp
(R20543)
Clip
(R3264)
[S40]
Clamp
(R20544)
[S20]
Clamp
(R20545)

Si001413EB Electrical Box
Removal Procedure 9
12 Disconnect the relay
connector for
compressor.
13 Open the sound blanket
(top upper) and detach
the discharge pipe
thermistor.
Be careful not to lose the
fixture for the thermistor.
14 Remove the 2 screws
and remove the
electrical box.
Step Procedure Points
Relay
connector
(R20652)
Sound blanket
(top upper)
Discharge pipe
thermistor
(R20546)
Fixture
(R20665)
Electrical box
(R20547)

PCB Si001413EB
10 Removal Procedure
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
2
Remove the screw and
release the earth /
ground wire.
Pull out the 3 clamps.
3
4
Cut the clamp.
Pull out the terminals
from the terminal board.
Before pulling out the
terminals, confirm the
terminal locations.
(1): black (back)
(2): white (back)
(3): red (front)
Earth / ground screw
Clamp Clamp
Clamp
(R20672)
Clamp
(R22020)
Clamp
(R20332)

Si001413EB PCB
Removal Procedure 11
5 Remove the 2 screws
and remove the
electrical component
mounting plate.
6 Remove the 7 screws.
7 Lift up and remove the
PCB.
Step Procedure Points
(R20674)
Electrical
component
mounting plate
(R20675)
PCB
(R20676)

Partition Plate / Sound Blankets Si001413EB
12 Removal Procedure
5. Partition Plate / 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 2 screws
and remove the
partition plate.
When reassembling, fit the
lower hook into the bottom
frame.
2 Remove the sound
blanket (top upper) and
sound blanket (top
lower).
Since the piping ports are
torn easily, remove the
sound blankets carefully.
3 Remove the sound
blanket (back).
Partition plate
(R20548)
Hook
(R20677)
Sound blanket
(top lower)
Sound blanket
(top upper)
(R20549)
Sound blanket
(back)
(R20550)

Si001413EB Partition Plate / Sound Blankets
Removal Procedure 13
4 Remove the sound
blanket (outer).
5 Remove the sound
blanket (inner).
Step Procedure Points
Sound blanket
(outer)
(R22021)
(R20552)
Sound blanket
(inner)

Electronic Expansion Valve Si001413EB
14 Removal Procedure
6. Electronic Expansion 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.
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 terminal
cover.
Terminal cover
(R20553)

Si001413EB Electronic Expansion Valve
Removal Procedure 15
2
3
4
Pull out the compressor
lead wires.
Pull out the overload
protector.
Remove the protection
bushing.
This is the view from the
back side.
5 Pull out the electronic
expansion valve coil.
6
7
Remove the putty.
Heat up the 2 brazed
parts and remove the
electronic expansion
valve.
Step Procedure Points
U (red)
Overload protector
V (yellow)
W (blue)
Protection bushing (R23353)
Electronic
expansion
valve coil
(R20555)
Putty
Electronic
expansion
valve
Brazed part
(R20556)

Compressor Si001413EB
16 Removal Procedure
7. 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 terminal
cover.
Terminal cover
(R20553)

Si001413EB Compressor
Removal Procedure 17
2
3
4
Pull out the compressor
lead wires.
Pull out the overload
protector.
Remove the protection
bushing.
This is the view from the
back side.
5
6
7
8
9
Remove the putty.
Heat up the brazed part
of the discharge side
and disconnect it.
Heat up the brazed part
of the suction side and
disconnect it.
Remove the 2 nuts.
Lift up the compressor
and remove it.
Step Procedure Points
U (red)
Overload protector
V (yellow)
W (blue)
Protection bushing (R23353)
Nut
Brazed part
Putty
Compressor
(R23399)

Revision History
Month / Year Version Revised contents
08 / 2014 Si001413E First edition
05 / 2015 Si001413EA Model addition: RKJ18NV1S, RKJ42NVMG, RKJ50NVM, RKJ50NVM4, RKJ50NVMV,
RKM50/60PVMG
04 / 2016 Si001413EB Model addition: ARKC18/24RV2S