Daikin RKS18JV2S User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
4.0/4.5/5.0/6.0 kW Class
18000 Btu/h Class
Outdoor Unit
Inverter
Pair Type
Si001274EC

Service Manual
Removal Procedure
Outdoor Unit
zCooling Only zHeat Pump
RKS18JV2S RXS40MVLT
RXS50MVLT
RKS40MVLT
RKS50MVLT RXS45LAVMA
RKS50J2V1B9 RXS50JAVLT
RKS60F3V1B9 RXS60JAVLT
RKS50GVM4 ARXS50G3V1B
RKS60GVM4 RX50G2V1B9
RX60G2V1B9
RKS50GVMV RX50G3V1B
RKS60GVMV RX60G3V1B
RKS50HVM RXG50K3V1B
RKS60HVM RXG50L2V1B
RKS50JAVLT RXS50J2V1B9
RKS60JAVLT RXS50K2V1B
RXS60F3V1B9
RKS50JVMG RXS60F4V1B
RKS60JVMG

Si001274EC
Removal Procedure 1
Table of Contents
1. Outer Panels ...........................................................................................2
2. Outdoor Fan / Fan Motor.........................................................................4
3. Electrical Box ..........................................................................................6
4. PCBs .....................................................................................................13
5. Sound Blankets / Thermistors ...............................................................19
6. Four Way Valve / Electronic Expansion Valve ......................................21
7. Compressor...........................................................................................24
Note: The illustrations may be slightly different depending on the model.
The illustrations are for heat pump models as representative.

Outer Panels Si001274EC
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
and remove the
discharge grille.
Take care not to cut your
finger by the fins of the
outdoor heat exchanger.
Slide the discharge grille
upward and remove it.
The discharge grille has 4
hooks.
Some models have only 2
hooks.
3 Remove the 6 screws
of the front panel.
4 Unfasten the 2 right
side hooks.
Top panel
Discharge grille (R18713)
(R16756)
Front panel
(R16757)
(R16759)

Si001274EC Outer Panels
Removal Procedure 3
5 Unfasten the 3 left side
hooks and remove the
front panel.
When reassembling, fit the 3
left side hooks of the front
panel first.
6 Remove the screw of
the stop valve cover.
7 Pull down the stop
valve cover to unfasten
the hooks and remove
it.
The stop valve cover has 6
hooks.
Step Procedure Points
(R16760)
Stop valve cover (R16761)
(R16762)
(R16763)

Outdoor Fan / Fan Motor Si001274EC
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 shield
plate.
2 Disconnect the
connector [S70].
[S70] : fan motor
3
4
Release the clamp from
the partition plate.
Release the fan motor
lead wire from the
groove and the 2 hooks
of the partition plate.
The ferrite core of the fan
motor lead wire has a clamp.
5 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.
Shield plate
(R16785)
(R16951)
[S70]
Ferrite core
Partition plate
(R18900)
Groove
Clamp
Hook
(R18901)
Nut Outdoor fan
10 mm
(0.39 inch)
(R18954)

Si001274EC Outdoor Fan / Fan Motor
Removal Procedure 5
6 Remove the 2 screws
of the fan motor fixing
frame.
7
8
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
lower 2 hooks into the
bottom frame.
9 Open the hook 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.
10 Remove the 4 screws
and remove the fan
motor.
Step Procedure Points
Fan motor fixing frame
(R16953)
(R16790)
(R16954)
Hook
(R3249)
Lead wire Outdoor fan
Fan motor
(R16792)

Electrical Box Si001274EC
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
protection plate.
2 Remove the 3 screws
and remove the wire
fixture.
3 Remove the 7 screws
and remove the
connecting wire and the
power supply wire.
4 Remove the 2 screws
and remove the earth /
ground wire.
(R18902)
Protection plate
123
Wire
fixture
(R18661)
(R16914)
Power supply wire
Connecting wire
(R18957)
Earth / ground wire

Si001274EC Electrical Box
Removal Procedure 7
5 Pull out the outdoor
temperature thermistor.
6 Remove the 4 screws
of the right side panel.
7 Unfasten the 3 hooks
and remove the right
side panel.
When reassembling, insert
the upper hook and the 2
lower hooks back into place.
Step Procedure Points
(R16794)
Outdoor temperature
thermistor
Right side panel (R18903)
Hook
(R16823)
Hook
(R16824)

Electrical Box Si001274EC
8Removal Procedure
8 Cut the clamp. The position of the clamp
varies depending on the
model.
9 Pull out the outdoor
heat exchanger
thermistor.
The position of the outdoor
heat exchanger thermistor
varies depending on the
model.
Be careful not to lose the clip
for the thermistor.
10 Disconnect the
connector [S70].
[S70]: fan motor
11
12
Release the clamp from
the partition plate.
Release the fan motor
lead wire from the
groove and the 2 hooks
of the partition plate.
The ferrite core of the fan
motor lead wire has a clamp.
Step Procedure Points
(R16766)
Outdoor
heat
exchanger
thermistor
(R16819)
Clip
(R3264)
(R16951)
[S70]
Ferrite core
Partition plate
(R18900)
Groove
Clamp
Hook

Si001274EC Electrical Box
Removal Procedure 9
13 Disconnect the
connector [S40].
[S40]: overload protector
14 Pull out the clamp.
15
16
Disconnect the
connector [S20].
Pull out the clamp.
[S20]: electronic expansion
valve coil
17 Pull out the clamp
under the electrical box.
Step Procedure Points
[S40]
(R16782)
(R16803)
(R18904)
[S20]
Clamp
(R16767)

Electrical Box Si001274EC
10 Removal Procedure
18 Remove the wire
saddle.
19 Disconnect the
connector [S80].
[S80]: four way valve coil
The cooling only models
have no harness for [S80].
When reassembling, insert
the clamps of harnesses as
below.
20 Pull out the clamp. When reassembling,
connect the connectors in
the following order.
(1) [S80]
(2) [S20]
(3) [S40]
(4) [S70]
21 Disconnect the relay
connector for the
compressor.
Step Procedure Points
Wire saddle
(R16800)
(R16801)
[S80]
[S40] [S80] [S20]
(R14363)
(R16802)
(R14312)

Si001274EC Electrical Box
Removal Procedure 11
22 Release the harness of
the relay connector
from the wire saddle.
23 Pull out the clamp from
the partition plate.
24 Disconnect the
connector [S90].
[S90]: thermistors
When reassembling, pass
the thermistor harness under
the harnesses (HL2: blue,
HN2: white) from the filter
PCB.
When reassembling, insert
the clamp as below.
25
26
Pull out the clamp.
Remove the wire
saddle.
Step Procedure Points
(R14313)
(R16950)
(R16806)
[S90]
(R16958)
Thermistor
harnesses
Wire
saddle
(R22532)

Electrical Box Si001274EC
12 Removal Procedure
27 Pull out the 2 clamps at
the bottom of the
electrical box.
When reassembling, insert
the 2 clamps into the bottom
of the electrical box.
28 Pull out the clamp at the
back.
29 Remove the screw and
remove the electrical
box.
Step Procedure Points
(R16768)
(R16769)
(R16749)
(R16770)
(R16771)

Si001274EC PCBs
Removal Procedure 13
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. [S12]: for [HL4] [HN4] on filter
PCB
1 Disconnect the
connector [S12] and
pull out the clamp.
2 Disconnect the
connector [S10].
[S10]: for [S11] on filter PCB
3 Pull out the clamp. When reassembling, insert
the clamp as below.
(R16959)
[S12] Main PCB
(R16808)
[S10]
(R16775)
(R20195)
For compressor harness
(red, blue, yellow)

PCBs Si001274EC
14 Removal Procedure
4 Disconnect the
connectors [HN3]
[HL3].
[HL3]: for [HL2] on filter PCB
[HN3]: for [HN2] on filter PCB
5 Pull out the clamp. When reassembling, insert
the clamp as below.
6
7
Remove the 2 upper
screws.
Remove the lower
screw.
Screw size
A: M4 × 16
B: M4 × 8
Step Procedure Points
[HN3]: white
[HL3]: blue
(R16809)
(R16810)
(R20196)
For harnesses from [HL2]
(blue) and [HN2] (white)
(R19541)
A
B
A

Si001274EC PCBs
Removal Procedure 15
8 Lift the main PCB
ASSY.
9 Unfasten the 4 hooks at
the bottom.
10
11
Remove the 8 screws.
Unfasten the 2 hooks
and remove the main
PCB.
Step Procedure Points
(R16813)
Main PCB ASSY
(R19536)
Hook
Hook
Hook
Hook
(R18663)

PCBs Si001274EC
16 Removal Procedure
2. Remove the radiation fin.
1 Remove the 2 screws
on the bottom of the
electrical box.
2 Remove the radiation
fin.
3. Remove the filter PCB.
1 Remove the earth /
ground wire screw.
2 Pull out the terminals
from the terminal board.
Before pulling out the
terminals, confirm the
terminal locations from the
following patterns.
Pattern 1
(1): black (back)
(2): white (back)
(3): red (front)
Pattern 2
(1): black (front)
(2): white (front)
(3): red (front)
Step Procedure Points
(R19537)
Electrical box
(R14334)
Radiation fin
(R19504)
Earth / ground
wire
Terminal board (R16815)
(1) (2) (3)

Si001274EC PCBs
Removal Procedure 17
3 Pull out the clamp.
4 Release the harnesses
from the groove.
5 Remove the 2 screws.
Step Procedure Points
(R16816)
(R16817)
(R16818)

PCBs Si001274EC
18 Removal Procedure
6 Unfasten the 3 hooks of
the filter PCB ASSY.
7
8
Remove the screw.
Unfasten the 2 hooks
and remove the filter
PCB.
Step Procedure Points
(R18905)
Filter PCB ASSY
(R14367)
(
R19538
)
Filter PCB