Daikin Si001554EC User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
Outdoor Unit
Inverter
Pair Type
9000/12000 Btu/h Class
Si001554EC

Service Manual
Removal Procedure
Outdoor Unit
Cooling Only Heat Pump
RK09NMVJU RX09NMVJU
RK12NMVJU RX12NMVJU
RKN09NMVJU RX09QMVJU
RKN12NMVJU RX12QMVJU
RX09RMVJU
RX12RMVJU
RX09RMVJU9
RX12RMVJU9
RXN09NMVJU
RXN12NMVJU
RXL09QMVJU

Si001554EC
Removal Procedure 1
Table of Contents
1. Outer Panels ...........................................................................................2
2. Outdoor Fan / Fan Motor.........................................................................3
3. Electrical Box / PCB ................................................................................5
4. Thermistor ASSY ..................................................................................10
5. Sound Blankets .....................................................................................14
6. Reactor / Electronic Expansion Valve Coil / Partition Plate ..................15
7. Four Way Valve.....................................................................................17
8. Compressor...........................................................................................19
Note: The illustrations may be slightly different depending on the model.
The illustrations are for heat pump models as representative.

Outer Panels Si001554EC
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 3 screws
and remove the top
panel.
Remove the 4 screws
of the front panel.
3
4
Unfasten the 2 left side
hooks, and then the 2
right side hooks.
Remove the front panel.
5 Unfasten the 2 hooks
on the top and remove
the discharge grille.
Front panel
Top panel
(R22821)
Hook
(R21605)
Hook
Discharge grille
Front panel
(R21606)

Si001554EC Outdoor Fan / Fan Motor
Removal Procedure 3
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 [S71] and
remove the filament
tape.
[S71]: fan motor
2 Release the fan motor
lead wire from the
groove.
3
4
Remove the nut of the
outdoor fan.
Remove the outdoor
fan.
Nut size: M6
Align the mark of the
outdoor fan with the D-cut
section of the motor shaft
when reassembling.
[S71]
Filament tape
(R22822)
Fan motor lead wireGroove (R21608)
Nut Outdoor fan (R21609)
10 mm
(0.39 inch)
(R18954)

Outdoor Fan / Fan Motor Si001554EC
4Removal Procedure
5 Remove the 2 screws
and remove the fan
motor fixing frame.
When reassembling, fit the 2
lower hooks into the bottom
frame.
6 Open the 3 hooks and
release the fan motor
lead wire.
7 Remove the 3 screws
from the fan motor.
8 Remove the fan motor.
Step Procedure Points
Fan motor fixing frame
(R21611)
Hook (R21610)
Hook
Fan motor lead wire
(R21612)
Fan motor
(R21613)
(R20826)

Si001554EC Electrical Box / PCB
Removal Procedure 5
3. Electrical Box / PCB
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 electrical
box.
1: black, front
2: white, front
3: red, front
1 Disconnect the 3
connectors from the
terminal board.
2 Remove the screw and
detach the earth /
ground wire.
3 Disconnect the
connector [S80].
[S80]: four way valve coil
Cooling only models have no
harness for [S80].
Connector
(R21614)
Earth / ground wire
(R21615)
[S80] (R21616)

Electrical Box / PCB Si001554EC
6Removal Procedure
4 Disconnect the
connector [S20].
[S20]: electronic expansion
valve coil
5 Disconnect the
connector [S40].
[S40]: overload protector
6 Disconnect the
connector [S30].
[S30]: compressor motor
Step Procedure Points
[S20] (R21617)
[S40]
(R21618)
[S30]
(R21619)

Si001554EC Electrical Box / PCB
Removal Procedure 7
7 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.
8 Disconnect the
connector [S90].
[S90]: thermistors
9 Pull out the clamp from
the bottom.
Step Procedure Points
Reactor Connector (R21620)
[S90] (R21621)
Clamp
(R21622)

Electrical Box / PCB Si001554EC
8Removal Procedure
10 Remove the screw of
the electrical box.
11 Slide the electrical box
to the right and lift up to
remove it.
There are 2 hooks at the
bottom and the top back of
the electrical box.
2. Remove the PCB.
1 Remove earth / ground
screw.
Step Procedure Points
Electrical box
(R21623)
(R21624)
Hook
(R20839)
Earth / ground screw
(R20840)

Si001554EC Electrical Box / PCB
Removal Procedure 9
2
3
Remove the 3 screws
of the PCB.
Unfasten the 2 spacers
and the 2 hooks from
the PCB.
4 Remove the PCB.
Step Procedure Points
Hook
Spacer
Hook
(R20841)
PCB
(R20842)

Thermistor ASSY Si001554EC
10 Removal Procedure
4. 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 Remove the screw.
2 Slide the stop valve
cover downward and
remove it.
When reassembling, make
sure to fit the 4 hooks.
3 Remove the 2 screws
and lift up the protection
plate to remove it.
When reassembling, make
sure to fit the 2 hooks.
Stop valve
cover
(R20843)
Hook
(R21630)
Protection
plate
(R21631)
Hook
(R21868)

Si001554EC Thermistor ASSY
Removal Procedure 11
4 Remove the 2 screws
and open the conduit
mounting plate cover to
the left, then remove it.
When reassembling, make
sure that the hook and the
projection are securely
fastened.
5 Remove the 7 screws
on the terminal board
and disconnect the
connecting wire and the
power supply wire.
6 Remove the 3 screws
of the right side panel.
Step Procedure Points
Cover
Conduit
mounting
plate
(R25929)
Projection
Hook
(R25930)
Connecting wire
Power supply
wire
Terminal
board
(R21633)
Right side
panel
(R21634)

Thermistor ASSY Si001554EC
12 Removal Procedure
7 Pull out the outdoor
temperature thermistor
holder.
8
9
Slide up the right side
panel to unfasten the
hook.
Remove the right side
panel.
10
11
Cut the clamp.
Pull out the outdoor
heat exchanger
thermistor.
Be careful not to lose the clip
for the thermistor.
The location of the clamp is
different depending on the
model.
Step Procedure Points
Outdoor temperature thermistor holder
(R21635)
Hook
Right side
panel
(R21636)
Outdoor heat
exchanger thermistor
Clamp
(R20851)
Clip
(R20852)

Si001554EC Thermistor ASSY
Removal Procedure 13
12 Pull out the discharge
pipe temperature
thermistor and remove
the thermistor ASSY.
Be careful not to lose the
fixture for the thermistor.
Step Procedure Points
Discharge pipe
temperature
thermistor
(R20853)
Thermistor ASSY
(R20855)
Fixture
(R20854)

Sound Blankets Si001554EC
14 Removal Procedure
5. 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).
The design of sound blanket
varies depending on the
model.
Since the piping ports on the
sound blanket are torn
easily, remove the blanket
carefully.
2 Detach the fastener and
pull out the sound
blanket (outer).
3 Pull out the sound
blanket (inner).
Sound blanket (top)
(R20856)
Sound blanket
(outer)
(R20857)
Sound blanket
(inner)
(R20858)

Si001554EC Reactor / Electronic Expansion Valve Coil / Partition Plate
Removal Procedure 15
6. Reactor / Electronic Expansion Valve Coil /
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 2 screws
of the reactor.
2 Slide the reactor
upward and remove it.
3 Pull out the electronic
expansion valve coil.
Reactor
(R20859)
Reactor
(R20860)
Electronic
expansion
valve coil
(R20861)

Reactor / Electronic Expansion Valve Coil / Partition Plate Si001554EC
16 Removal Procedure
4 Remove the 2 screws
of the partition plate.
5 Lift up the partition plate
and remove it.
When reassembling, fit the
hook on the bottom frame.
Step Procedure Points
Partition plate
(R20862)
Partition plate
(R20863)
Hook (R20864)

Si001554EC Four Way Valve
Removal Procedure 17
7. Four Way Valve
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.)
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.
Cautions for restoration
1. Restore the piping by non-oxidation brazing.
2. It is required to prevent the carbonization of the oil inside the four way valve and the
deterioration of the gaskets affected by heat. (Keep below 120°C (248°F).) For the sake of
this, wrap the four way valve with wet cloth and provide water so that the cloth does not
dry.
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 Remove the screw and
remove the four way
valve coil.
Cooling only models have no
four way valve coil.
Four way
valve coil
(R21650)

Four Way Valve Si001554EC
18 Removal Procedure
2 Remove the terminal
cover.
3
4
Remove the protection
bushing.
Disconnect the
compressor lead wires
and the overload
protector.
5
6
7
Remove the putty.
Heat up and disconnect
the brazed parts of the
four way valve.
Remove the four way
valve.
Step Procedure Points
Terminal cover
(R20866)
Overload protector
V (yellow)
W (blue)
Protection
bushing
U (red)
(R22758)
Brazed part
Putty
Four way
valve
(R20868)