Daikin RKM20PVMA User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
2.0/2.5/3.5 kW Class
Outdoor Unit
Inverter
Pair Type
Si001420E

Service Manual
Removal Procedure
Outdoor Unit
zCooling Only zHeat Pump
RKM20PVMA RXJ25PVMA
RKM25PVMA RXJ35PVMA
RKM35PVMA
RXM20PVMA
RXM25PVMA
RXM35PVMA

Si001420E
Removal Procedure 1
Table of Contents
1. Outer Panels ...........................................................................................2
2. Outdoor Fan / Fan Motor.........................................................................4
3. Electrical Box ..........................................................................................6
4. PCBs .......................................................................................................9
5. Thermistor ASSY ..................................................................................15
6. Reactor / Partition Plate ........................................................................16
7. Sound Blankets .....................................................................................17
8. Four Way Valve.....................................................................................18
9. Compressor...........................................................................................20
Note: The illustrations may be slightly different depending on the model.
The illustrations are for heat pump models as representative.

Outer Panels Si001420E
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 Remove the 3 screws
and remove the top
panel.
2 Remove the drip proof
cover.
3 Remove the 4 screws
of the discharge grille.
Top panel
(R21214)
Drip proof cover
(R21215)
(R21216)
Discharge grille

Si001420E Outer Panels
Removal Procedure 3
4 Unfasten the 4 hooks
and remove the
discharge grille.
5 Remove the 8 screws
of the front panel.
6 Unfasten the 4 hooks
and remove the front
panel.
When reassembling, make
sure to fit the 4 hooks.
Step Procedure Points
Discharge grille (R21217)
(R21218)
Front panel (R21219)

Outdoor Fan / Fan Motor Si001420E
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 Disconnect the
connector [S70].
[S70]: fan motor
2 Release the outdoor
temperature thermistor
from the protection net
and pull out from the
top U-bend pipe of
outdoor heat
exchanger.
When reassembling, make
sure to pass the outdoor
temperature thermistor
through the top U-bend pipe
and the slit, then fix it at the
holder.
3 Release the fan motor
lead wire from the
groove and the hook.
[S70]
(R21220)
Outdoor temperature thermistor
Protection net
(R21221)
Slit
Top U-bend pipe (R21222)
Hook Fan motor
lead wire
Groove
(R21223)

Si001420E Outdoor Fan / Fan Motor
Removal Procedure 5
4
5
Remove the nut of the
outdoor fan.
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.
6 Remove the screw and
remove the fan motor
fixing frame.
When reassembling, fit the
lower 2 hooks into the
bottom frame.
7 Release the fan motor
lead wire from the 2
hooks.
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.
8 Remove the 4 screws
and remove the fan
motor.
Step Procedure Points
Outdoor fan
Nut
(R21224)
10 mm
(0.39 inch)
(R18954)
Fan motor fixing frame
(R21225)
(R21226)
Hook
(R21227)
(R3249)
Lead wire Outdoor fan
Fan motor
(R21228)

Electrical Box Si001420E
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 right side
panel.
When reassembling, make
sure to fit the 5 hooks.
1
2
Remove the screw.
Slide the stop valve
cover downward and
remove it.
3
4
5
Remove the 3 screws
and remove the wire
fixture.
Remove the 7 screws
on the terminal board
and detach the
connecting wire and the
power supply wire.
Remove the 4 screws
and detach the demand
communication wire.
When reassembling, fasten
the demand communication
wire with the clamp to the
wire fixture.
6 Remove the 7 screws
and remove the right
side panel.
Stop valve cover (R21229)
(R21230)
Power supply
wire
Connecting wire
Demand
communication
wire Wire fixture
Terminal
board
(R21231)
123
(R21256)
Clamp
Right side panel
(R21232)

Si001420E Electrical Box
Removal Procedure 7
2. Remove the electrical
box.
The cooling only models
have no harness for four way
valve coil.
1 Disconnect the relay
connector for four way
valve coil.
2 Disconnect the relay
connector for electronic
expansion valve coil.
The cooling only models
have no relay connector for
electronic expansion valve
coil, disconnect the
connector [S20] instead.
3 Disconnect the
connectors for the
reactor.
4 Disconnect the relay
connector for
compressor.
Step Procedure Points
(R21233)
(R21234)
Connector for the reactor
(R21235)
(R21236)

Electrical Box Si001420E
8Removal Procedure
5 Disconnect the
connector [S90].
[S90]: thermistors
6 Disconnect the
connector [S40].
[S40]: overload protector
7 Lift up the electrical box
and remove it.
When reassembling,
connect the connectors in
the reverse order.
Step Procedure Points
[S90]
(R21237)
[S40]
(R21238)
Electrical box
(R21239)