Daikin RKS20J2V1B User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
Outdoor Unit
Inverter
Pair Type
2.0/2.5/3.0/3.5 kW Class
Si001067

Service Manual
Removal Procedure
Outdoor Unit
zCooling Only zHeat Pump
RKS20J2V1B RXG25J2V1B
RKS25J2V1B RXG35J2V1B
RKS35J2V1B
RXL20G2V1B9
RKS20KVLT
RKS25KVLT RXL20G3V1B
RKS30KVLT
RXS25G2V1B9
RKS25KVMA RXS35G2V1B9
RKS35KVMA
RXS20J2V1B
RKS20G2V1B9 RXS25J2V1B
RKS25G2V1B9 RXS35J2V1B
RKS35G2V1B9
RXS20KVLT
RXS25KVLT
RXS30KVLT
RXS25KVMA
RXS35KVMA
RXS20G2V1B9
RXS25G2V1B9
RXS35G2V1B9
ARXS20G3V1B
ARXS25G3V1B
ARXS35G3V1B

Si001067
Removal Procedure 1
Table of Contents
1. Removal of Outer Panels / Fan Motor.....................................................2
2. Removal of Electrical Box .....................................................................11
3. Removal of PCBs..................................................................................14
4. Removal of Reactor / Partition Plate .....................................................21
5. Removal of Sound Blankets..................................................................23
6. Removal of Four Way Valve .................................................................25
7. Removal of Compressor .......................................................................28
Note: The illustrations may be slightly different depending on the model.
The illustrations are for heat pump models as representative.

Removal of Outer Panels / Fan Motor Si001067
2Removal Procedure
1. Removal of Outer Panels / Fan Motor
Procedure 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
Take care not to cut your
finger by the fins of the
outdoor heat exchanger.
2. Remove the panels.
The stop valve cover is
united with the shield plate.
When reassembling, make
sure to fit the 5 hooks.
1Remove the screw of
the stop valve cover.
Pull the stop valve
cover downward and
remove it.
(R7186)
(R16044)
Stop
valve
cover
(R7188)
Shield plate
Hook
(R13504)

Si001067 Removal of Outer Panels / Fan Motor
Removal Procedure 3
2Remove the 3 screws
and lift the top panel.
Some models have only 2
screws.
3Remove the drip proof
plate.
4Remove the 4 screws
and remove the
discharge grille.
The discharge grille has 4
hooks.
Step Procedure Points
Top panel
(R13503)
(R7191)
Drip proof plate
(R7192)
Discharge
grille
(R7193)

Removal of Outer Panels / Fan Motor Si001067
4Removal Procedure
5Remove the 8 screws
of the front panel.
6Unfasten the hooks.
Pull and remove the
front panel.
The front panel has 4 hooks.
Step Procedure Points
(R11825)
Front panel
(R13505)
Hook

Si001067 Removal of Outer Panels / Fan Motor
Removal Procedure 5
3. Remove the fan motor. Nut size: M6
1Remove the nut of the
outdoor fan.
2Remove the outdoor
fan.
When reassembling, align
the mark of the outdoor
fan with the D-cut section of
the motor shaft.
3Release the outdoor
temperature thermistor.
Step Procedure Points
(R13741)
Outdoor fan
10 mm
(R12236)
(R11828)
D-cut
(R11829)
Outdoor temperature
thermistor

Removal of Outer Panels / Fan Motor Si001067
6Removal Procedure
4Cut the clamp. Some models do not have
the clamp.
5Disconnect the
connector for the fan
motor [S70].
6Release the fan motor
lead wire from the hook.
Step Procedure Points
(R11830)
(R16678)
[S70]
(R11832)
Fan motor
lead wire

Si001067 Removal of Outer Panels / Fan Motor
Removal Procedure 7
7Remove the screw and
remove the fan motor
fixing frame.
When reassembling, fit the
lower hooks into the bottom
frame.
Step Procedure Points
(R11833)
Fan motor fixing frame
(R12314)
(R7206)

Removal of Outer Panels / Fan Motor Si001067
8Removal Procedure
8Open 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.
9Remove the 4 screws
and remove the fan
motor.
4. Remove the right side
panel.
1Remove the 2 screws
on the rear side.
Step Procedure Points
(R11835)
(R3249)
Lead wire Outdoor fan
(R12311)
Fan motor
(R12162)

Si001067 Removal of Outer Panels / Fan Motor
Removal Procedure 9
2Remove the 4 screws
on the right side panel.
3Remove the screw near
the stop valves.
4Unfasten the hook on
the rear side.
When reassembling, make
sure to fit the hook.
Step Procedure Points
(R12163)
Right side panel
(R11839)
(R11842)

Removal of Outer Panels / Fan Motor Si001067
10 Removal Procedure
5Lift up the right side
panel and remove it.
When reassembling, make
sure to fit the hook.
6Lift up the guard net
and remove it.
Step Procedure Points
(R12272)
Hook
(R11841)
Guard net

Si001067 Removal of Electrical Box
Removal Procedure 11
2. Removal of Electrical Box
Procedure 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 for the four
way valve coil [S80].
Preparation
Remove the outer panels
and disconnect the
connector for the fan motor
according to the “Removal
of Outer Panels / Fan
Motor”.
2Disconnect the
connector for the
electronic expansion
valve coil [S20].
3Disconnect the 2
connectors for the
reactor.
When reassembling, you
can connect the 2
harnesses in either way
regardless of the color.
(R11848)
[S80]
(R17476)
[S20]
(R17477)

Removal of Electrical Box Si001067
12 Removal Procedure
4Disconnect the relay
connector for the
compressor.
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) [S80]
(6) [S70]
6Cut the clamp.
Step Procedure Points
(R17478)
(R17479)
[S40]
(R11850)

Si001067 Removal of Electrical Box
Removal Procedure 13
7Pull 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
clip for the thermistor.
9Lift and remove the
electrical box.
Step Procedure Points
(R11851)
Outdoor heat
exchanger thermistor
(R3264)
Clip
Discharge pipe thermistor (R11849)
(R12279)
Clip
(R11852)
Electrical Box

Removal of PCBs Si001067
14 Removal Procedure
3. Removal of PCBs
Procedure 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 board without
removing the electrical box.
1Layout of the main PCB
2Remove the screw on
the terminal board.
3Release the 2 earth
wires.
(R13506)
Main PCB Forced operation
button PCB
(R11854)
Terminal
board
(R17020)
Earth
wire

Si001067 Removal of PCBs
Removal Procedure 15
4Pull 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.
5Disconnect the
selective connector for
standby electricity
saving and pull out the
relay connector.
6Cut the clamp.
Step Procedure Points
Forced operation button PCB
(R13742)
[S110]
(R13507)
Selective connector
Relay
connector
(R11858)

Removal of PCBs Si001067
16 Removal Procedure
7Release the harness.
8Cut the clamps at the 2
locations.
9Disconnect the
connector for the filter
PCB [S10].
Step Procedure Points
(R11859)
(R11860)
(R11861)
[S10]

Si001067 Removal of PCBs
Removal Procedure 17
10 Disconnect the
connectors for the
magnetic relay [S50]
and for the forced
operation button PCB
[S100].
11 Disconnect the
connector for the filter
PCB [HL3] [HN3].
12 Release the harnesses
from the hook.
13 Release the harness for
the outdoor
temperature thermistor.
Step Procedure Points
(R11862)
[S100]
[S50]
[HL3]
[HN3]
(R11863)
(R11864)
(R11865)

Removal of PCBs Si001067
18 Removal Procedure
14 Remove the 6 screws.
15 Unfasten the 4 hooks
and remove the main
PCB.
[S10] [HL3] [HN3]: filter PCB
[S20]: electronic expansion
valve coil
[S40]: overload protector
[S50]: magnetic relay
[S70]: fan motor
[S80]: four way valve coil
[S90]: thermistors
[S100]: forced operation button
PCB
Step Procedure Points
(R11866)
(R11867)
(R11868)
[S50] [S100]
[S90] [S10]
[HN3]
[HL3]
[S80]
[S20]
[S40]
[S70]