Daikin RKS20LVMA User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
2.0/2.5/3.5 kW Class
9000/12000 Btu/h Class
Outdoor Unit
Inverter
Pair Type
Si001155EA

Service Manual
Removal Procedure
Outdoor Unit
zCooling Only zHeat Pump
RKS20LVMA RXS09LVJU
RKS25LVMA RXS12LVJU
RKS35LVMA
RXS20LVMA
RXS25LVMA
RXS35LVMA
RXS25LAVMA
RXS25LBVMA
RXS35LBVMA
RXS25RV1A

Si001155EA
Removal Procedure 1
Table of Contents
1. Outer Panels / Fan Motor........................................................................2
2. Electrical Box ........................................................................................10
3. PCBs .....................................................................................................13
4. Reactor / Partition Plate ........................................................................20
5. Sound Blankets .....................................................................................21
6. Four Way Valve.....................................................................................23
7. Compressor...........................................................................................26
Note: The illustrations may be slightly different depending on the model.
The illustrations are for heat pump models as representative.

Outer Panels / Fan Motor Si001155EA
2Removal Procedure
1. Outer Panels / 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. Appearance features
Be careful not to cut your
finger on the fins of the
outdoor heat exchanger.
2. Remove the outer panels.
The stop valve cover is
united with the shield plate.
When reassembling, make
sure the 5 hooks are
securely fastened.
1
2
Remove the screw of
the stop valve cover.
Pull downward and
remove the stop valve
cover.
(R7186)
(R16044)
Stop
valve
cover
(R7188)
Shield plate
Hook
(R13504)

Si001155EA Outer Panels / Fan Motor
Removal Procedure 3
3 Remove the 3 screws
and lift the top panel.
4 Remove the drip proof
plate.
5 Remove the 4 screws,
and then the discharge
grille.
When reassembling, make
sure the 4 hooks are
securely fastened.
Step Procedure Points
Top panel
(R13503)
Drip proof plate
(R7191)
Discharge
grille
(R7192)
(R24375)

Outer Panels / Fan Motor Si001155EA
4Removal Procedure
6 Remove the 8 screws
of the front panel.
7 Unfasten the hooks and
pull out the front panel.
When reassembling, make
sure the 4 hooks are
securely fastened.
3. Remove the fan motor. Nut size: M6
1 Remove the nut of the
outdoor fan.
Step Procedure Points
Front panel (R11825)
Hook
(R24376)
Outdoor fan
(R16922)
10 mm
(0.39 inch)
(R18954)

Si001155EA Outer Panels / Fan Motor
Removal Procedure 5
2 Remove the outdoor
fan.
When reassembling, align
the mark of the outdoor
fan with the D-cut section of
the motor shaft.
3 Release the outdoor
temperature thermistor.
4 Disconnect the
connector [S70].
[S70]: fan motor
5 Release the fan motor
lead wire from the hook.
Step Procedure Points
D-cut
(R11828)
Outdoor temperature
thermistor
Back view
(R24377)
[S70] (R16923)
Fan motor
lead wire
(R11832)

Outer Panels / Fan Motor Si001155EA
6Removal Procedure
6 Remove the screw.
7 Remove the fan motor
fixing frame.
When reassembling, fit the 2
lower hooks into the bottom
frame.
Step Procedure Points
Fan motor fixing frame
(R11833)
(R12314)
(R7206)

Si001155EA Outer Panels / Fan Motor
Removal Procedure 7
8 Open 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.
9 Remove the 4 screws,
and then the fan motor.
4. Remove the right side
panel.
For U.S. models
1. Remove the screws and
detach the connecting wires
from the terminal block.
2. Loosen the lock nuts and
detach the connecting wires
from the conduit holes.
1
2
Remove the 3 screws,
and then the wire
fixture.
Remove the 7 screws
and detach the
connecting wire and the
power supply wire.
Step Procedure Points
(R11835)
(R3249)
Lead wire Outdoor fan
Fan motor
(R12311)
123
(R24265)
Power
supply
wire
Connecting
wire
(R17639)
Lock nut
Conduit
mounting
plate
Conduit
1/2 inch
(21.3mm)

Outer Panels / Fan Motor Si001155EA
8Removal Procedure
3 Remove the 2 screws
on the rear side.
4 Remove the 4 screws
on the right side panel.
5 Remove the screw.
6 Unfasten the hook on
the rear side.
When reassembling, make
sure the hook is securely
fastened.
Step Procedure Points
(R12162)
Right side panel
(R12163)
(R11839)
(R11842)

Si001155EA Outer Panels / Fan Motor
Removal Procedure 9
7 Lift up the right side
panel and remove it.
When reassembling, make
sure the hook is securely
fastened.
8 Lift up the guard net
and remove it.
Step Procedure Points
Hook
(R12272)
Guard net
(R11841)

Electrical Box Si001155EA
10 Removal Procedure
2. 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 [S80].
[S80]: four way valve coil
The cooling only models do
not have the harness for
[S80].
2 Disconnect the
connector [S20].
[S20]: electronic expansion
valve coil
3 Disconnect the 2
connectors for the
reactor.
When reassembling, you
can connect the 2 harnesses
in either way regardless of
the color.
4 Disconnect the relay
connector for the
compressor.
[S80]
(R17144)
(R17050)
[S20]
(R16926)
(R16927)

Si001155EA Electrical Box
Removal Procedure 11
5 Disconnect the
connector [S40].
[S40]: overload protector
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 Cut the clamp.
7 Pull out the outdoor
heat exchanger
thermistor.
Be careful not to lose the clip
for the thermistor.
Step Procedure Points
[S40]
(R16924)
(R11850)
(R11851)
Outdoor heat
exchanger thermistor
(R3264)
Clip

Electrical Box Si001155EA
12 Removal Procedure
8 Release the discharge
pipe thermistor.
Be careful not to lose the clip
for the thermistor.
9 Lift and remove the
electrical box.
Step Procedure Points
Discharge pipe thermistor (R11849)
(R12279)
Clip
Electrical Box
(R16929)

Si001155EA PCBs
Removal Procedure 13
3. 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 when you disconnect
the lead wires on the
terminal block without
removing the electrical box.
1 Layout of the main PCB
2 Remove the screw on
the terminal block.
3 Release the 2 earth/
ground wires.
Main PCB Forced operation
button PCB
(R16930)
Terminal
block
(R24283)
Earth/ground
wire
(R24266)

PCBs Si001155EA
14 Removal Procedure
4
5
Pull out the forced
operation button PCB.
Disconnect the
connector [S110].
Be careful of the sharp
protrusion at the back of the
forced operation button
PCB.
[S110]: main PCB
6 Cut the clamp.
7 Release the harness.
Step Procedure Points
Forced operation button PCB
[S110]
(R16932)
(R16933)
(R16934)

Si001155EA PCBs
Removal Procedure 15
8 Cut the 2 clamps.
9 Disconnect the
connector [S10].
[S10]: filter PCB
10 Disconnect the
connector [S100].
[S100]: forced operation button
PCB
11 Disconnect the
connectors [HL3] and
[HN3].
[HL3][HN3]: filter PCB
Step Procedure Points
(R16935)
[S10] (R16936)
[S100]
(R16937)
[HL3]
[HN3]
(R16938)

PCBs Si001155EA
16 Removal Procedure
12 Release the harnesses
from the slit.
13 Release the harness for
the outdoor
temperature thermistor.
14 Remove the 6 screws.
Step Procedure Points
(R16939)
(R11865)
(R16940)

Si001155EA PCBs
Removal Procedure 17
15 Unfasten the 4 hooks
and remove the main
PCB.
2. Remove the filter PCB.
1 Release the harnesses
from the slit.
2 Cut the clamp.
Step Procedure Points
(R16941)
Filter PCB
(R16942)
(R16943)

PCBs Si001155EA
18 Removal Procedure
3 Release the harnesses
from the slit.
4 Release the harnesses
from the 2 hooks.
5 Remove the screw.
6 Unfasten the 2 hooks.
Step Procedure Points
(R16944)
(R16945)
(R17244)
(R24267)