Daikin RKC09NV2S User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
1.5/2.0/2.5/3.5 kW Class
9000/12000 Btu/h Class
Outdoor Unit
Inverter
Pair Type
Si001416E

Service Manual
Removal Procedure
Outdoor Unit
zCooling Only
RKC09NV2S
RKC12NV2S
RKC15NVM4
RKC20NVM4
RKC25NVM4
RKC35NVM4
RKC25NVM
RKC35NVM
RKC25NVMV
RKC35NVMV

Si001416E
Removal Procedure 1
Table of Contents
1. Outer Panels ...........................................................................................2
2. Outdoor Fan / Fan Motor.........................................................................4
3. Electrical box...........................................................................................6
4. PCB.......................................................................................................10
5. Reactor / Partition Plate ........................................................................12
6. Thermistor ASSY ..................................................................................14
7. Sound Blankets .....................................................................................15
8. Electronic Expansion Valve Coil / Compressor.....................................16
Note: The illustrations may be slightly different depending on the model.

Outer Panels Si001416E
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.
The stop valve cover is
united with the shield plate.
When reassembling, make
sure to fit the 3 hooks.
3
4
Remove the 3 screws
and remove the top
panel.
Remove the 6 screws
of the front panel.
Stop valve
cover
(R21285)
Hook
Shield plate
(R21286)
Top panel
Front panel
(R21287)

Si001416E Outer Panels
Removal Procedure 3
5
6
Lift up the left side and
unfasten the 2 hooks.
Unfasten the 2 right
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
Left Right
Front panel (R21288)
Rear side
Projection
(rear side)
Discharge
grille (R21289)
Hook
Discharge
grille Hook (R21290)

Outdoor Fan / Fan Motor Si001416E
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
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.
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.
2 Disconnect the
connector [S70].
[S70]: fan motor
When reassembling, do not
fix the fan motor lead wire
inside the hook of the
electrical box.
Nut
Outdoor fan
D-cut
(R21291)
10 mm
(0.39 inch)
(R18954)
Lead wire Outdoor fan
(R3249)
Hook
[S70]
(R21292)

Si001416E Outdoor Fan / Fan Motor
Removal Procedure 5
3 Release the fan motor
lead wire from the 2
grooves and the 2
hooks.
When reassembling, pass
the fan motor lead wire as
shown below.
4 Remove the screw and
remove the fan motor
fixing frame.
When reassembling, fit the 2
lower hooks into the bottom
frame.
5 Unfasten the 2 hooks
on the motor fixing
frame and release the
fan motor lead wire.
6 Remove the 3 screws
and remove the fan
motor.
Screw size: M4 × 16
Step Procedure Points
Hook
Groove (R21293)
Fan motor lead wire
(R21320)
Fan motor fixing frame
(R21294)
(R10460)
Fan motor lead wire
Hook
(R21295)
Fan motor
(R21296)

Electrical box Si001416E
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 Disconnect the
connector [S20] and
pull out the clamp.
[S20]: electronic expansion
valve coil
2 Cut the clamp and
disconnect the
connector [S40].
[S40]: overload protector
3 Disconnect the relay
connector for
compressor.
Clamp
[S20]
(R21297)
[S40]
Clamp
(R21298)
Relay
connector
(R21299)

Si001416E Electrical box
Removal Procedure 7
4 Disconnect the
connector [S90] and
pull out the clamp.
[S90]: thermistors
5 Disconnect the 2
connectors from the
reactor.
When reassembling, you
can reconnect the 2
connectors for the reactor in
either way regardless of the
color.
6 Remove the 3 screws
and remove the wire
fixture.
Step Procedure Points
Clamp
[S90]
(R21300)
Connector
Reactor
(R21301)
Wire fixture
(R21302)

Electrical box Si001416E
8Removal Procedure
7 Remove the 7 screws
on the terminal board
and disconnect the
connecting wire and
power supply wire.
8 Remove the 2 screws
on the right side panel,
then remove the screw
on the partition plate.
9 Remove the outdoor
temperature thermistor
from the protection net,
the hook, and the slit.
Step Procedure Points
Terminal board
Connecting wire Power supply wire (R21303)
Right Front
Right side panel Partition plate
(R21304)
Protection
net
Outdoor
temperature
thermistor
Hook
Slit
(R21305)

Si001416E Electrical box
Removal Procedure 9
10 Lift up the protection
net and remove it.
11 Lift up the electrical box
and remove it.
Step Procedure Points
Protection
net
(R21314)
Electrical box
(R21306)

PCB Si001416E
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
Cut the clamp and
remove the screw from
the terminal board.
Remove the 2 earth /
ground screws.
When reassembling, fit the
projection at the back of the
terminal board into the hole
on the mounting plate.
3
4
Release the terminal
board harnesses from
the hook inside the
electrical box.
Cut the clamp to
release the relay
harness for the
compressor.
5 Remove the screw and
unfasten the hook on
the left side to remove
the electrical box cover.
Terminal board
Clamp
Earth / ground
screw
(R21307)
Mounting
plate
Projection
(R21308)
Clamp
Relay harness
Terminal board
harness
Hook
(R21309)
Electrical box cover
Hook
(R21310)

Si001416E PCB
Removal Procedure 11
6 Remove the insulation
sheet.
The insulation sheet can be
easily removed by using a
flat-head screwdriver.
7
8
Remove the 5 screws
of the PCB.
Unfasten the hook and
remove the PCB.
Step Procedure Points
Insulation sheet
(R21311)
PCB Hook
(R21312)
(R21313)

Reactor / Partition Plate Si001416E
12 Removal Procedure
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 3 screws
of the right side panel.
2 Unfasten the 2 hooks
and remove the right
side panel.
When reassembling, make
sure to fit the rear hook.
3
4
5
Remove the screw of
the reactor.
Slide the reactor
upward to unfasten the
2 hooks.
Remove the reactor.
Right side
panel
(R21315)
Hook
Hook
(R21316)
Hook
(R21317)
Reactor
Hook
(R21318)

Si001416E Reactor / Partition Plate
Removal Procedure 13
6 Remove the 2 screws
and remove the
partition plate.
When reassembling, fit the
hook on the bottom frame.
Step Procedure Points
Partition plate
(R21319)
Hook
(R21363)

Thermistor ASSY Si001416E
14 Removal Procedure
6. 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
2
3
Pull out the discharge
pipe temperature
thermistor.
Cut the clamp.
Pull out the outdoor
heat exchanger
thermistor and remove
the thermistor ASSY.
Be careful not to lose the
fixture for the thermistor.
Be careful not to lose the clip
for the thermistor.
Discharge pipe
temperature
thermistor
Clamp
Outdoor heat
exchanger thermistor
(R21321)
Thermistor ASSY
(R21322)
Fixture
(R20430)
Clip
(R20852)

Si001416E Sound Blankets
Removal Procedure 15
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.
2 Untie the 2 strings and
pull out the sound
blanket (outer).
3 Pull out the sound
blanket (inner).
Sound
blanket (top)
(R21323)
Sound blanket
(outer) (R21324)
Sound blanket
(inner) (R21325)

Electronic Expansion Valve Coil / Compressor Si001416E
16 Removal Procedure
8. Electronic Expansion Valve Coil / 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 Pull out the electronic
expansion valve coil. Electronic
expansion
valve coil
(R21328)

Si001416E Electronic Expansion Valve Coil / Compressor
Removal Procedure 17
2 Remove the terminal
cover.
3
4
5
Remove the protection
bushing.
Disconnect the
compressor lead wires.
Disconnect the
overload protector.
6
7
8
9
Heat up the brazed part
of the discharge side
pipe and disconnect it.
Heat up the brazed part
of the suction side pipe
and disconnect it.
Remove the 3 nuts.
Lift up the compressor
and remove it.
Step Procedure Points
Terminal cover
(R21326)
U (red)
Protection
bushing
W (blue)
V (yellow)
Overload protector (R21327)
Brazed part of the
discharge side pipe
Brazed part
of the suction
side pipe
Compressor
Nut (R21329)

Revision History
Month / Year Version Revised contents
03 / 2015 Si001416E First edition