Daikin RKM46PVMA User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
Outdoor Unit
Inverter
Pair Type
4.1/4.2/4.6/5.0/6.0/6.3 kW Class
Si001421EA

Service Manual
Removal Procedure
Outdoor Unit
zCooling Only zHeat Pump
RKM46PVMA RXJ41NVLT
RKM50PVMA
RKM60PVMA RXJ50LV1B
RXJ50NVMV
RXJ50PVMA
RXM42LV1B
RXM50LV1B
RXM41NVLT
RXM50NVLT
RXM46PVMA
RXM50PVMA
RXM60PVMA
RXV41NVLT
RXV50NVLT
RXV63NVLT

Si001421EA
Removal Procedure 1
Table of Contents
1. Outer Panels ...........................................................................................2
2. Outdoor Fan / Fan Motor.........................................................................4
3. Electrical Box ..........................................................................................6
4. PCBs .....................................................................................................11
5. Partition Plate / Sound Blankets............................................................14
6. Electronic Expansion Valve Coil / Four Way Valve...............................16
7. Compressor...........................................................................................18
Note: The illustrations may be slightly different depending on the model.
The illustrations are for heat pump models as representative.

Outer Panels Si001421EA
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 4 screws
and remove the top
panel.
2 Remove the 4 screws.
3 Unfasten the 6 hooks
and remove the
discharge grille.
Top panel
(R21371)
(R21372)
Discharge grille
(R21373)

Si001421EA Outer Panels
Removal Procedure 3
4 Remove the 6 screws.
5 Unfasten the 4 hooks
and remove the front
panel.
Step Procedure Points
(R21374)
Front panel
(R21375)

Outdoor Fan / Fan Motor Si001421EA
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 drip proof
cover.
2 Cut the clamp.
3
4
Disconnect the
connector [S70].
Release the fan motor
lead wire from the
groove and the hook.
[S70]: fan motor
Drip proof cover
(R21376)
Clamp
(R21377)
Hook [S70] Groove Fan motor
lead wire
(R21378)

Si001421EA Outdoor Fan / Fan Motor
Removal Procedure 5
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.
6 Remove the 2 screws
and remove the fan
motor fixing frame.
7 Open the 3 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.
8 Remove the 4 screws
and remove the fan
motor.
Step Procedure Points
Outdoor fan
Nut
(R21379)
10 mm
(0.39 inch)
(R18954)
Fan motor fixing frame
(R21380)
Hook
Fan motor
lead wire (R21381)
(R3249)
Lead wire Outdoor fan
Fan motor
(R21382)

Electrical Box Si001421EA
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 6 hooks.
1
2
Remove the screw.
Pull down and remove
the stop valve cover.
3
4
Remove the 2 screws.
Slide upward and
remove the shield plate.
5 Remove the 3 screws
and remove the wire
fixture.
Stop valve cover (R21383)
(R21384)
Shield plate
(R21385)
Wire fixture
(R21386)

Si001421EA Electrical Box
Removal Procedure 7
6
7
8
Remove the 7 screws
and detach the
connecting wire and the
power supply wire.
Remove the 4 screws
and detach the demand
communication wire.
Remove the screw and
detach the earth /
ground wire.
When reassembling, fasten
the demand communication
wire with the clamp to the
wire fixture.
Some models have no
demand communication
wire.
9 Pull out the outdoor
temperature thermistor
from the protection net
and the groove.
When reassembling, pass
the thermistor harness
through between the heat
exchanger pipes as below.
10 Remove the 4 screws
and remove the right
side panel.
Step Procedure Points
Earth /
ground
screw
Power
supply
wire
Connecting wire
Demand communication wire (R21387) Clamp (R21388)
Outdoor
temperature
thermistor
Protection
net
Groove
(R22537)
Thermistor
harness
Heat exchanger pipe
(R21390)
Right side panel
(R21391)

Electrical Box Si001421EA
8Removal Procedure
When reassembling, make
sure to fit the 4 hooks.
2. Remove the thermistor
ASSY.
[S90]: thermistors
1
2
Disconnect the
connector [S90].
Pull out the clamp.
3 Slightly open the sound
blanket (top) and
detach the discharge
pipe thermistor.
Be careful not to lose the
fixture for the thermistor.
4 Remove the sound
blanket (back).
Step Procedure Points
Hook
Hook
(R21392)
Clamp
[S90]
(R21393)
Discharge pipe thermistor
Sound blanket
(top)
(R21394)
Fixture
(R21395)
Sound blanket
(back)
(R21396)

Si001421EA Electrical Box
Removal Procedure 9
5
6
Cut the clamp.
Pull out the outdoor
heat exchanger
thermistor.
Be careful not to lose the clip
for the thermistor.
7 Remove the thermistor
ASSY.
3. Remove the electrical
box.
[S40]: overload protector
When reassembling,
connect the connectors in
the following order.
(1) [S20]
(2) [S80]
(3) relay connector for
compressor
(4) [S40]
1 Disconnect the
connector [S40].
2 Disconnect the relay
connector for the
compressor.
Step Procedure Points
Clamp
Outdoor heat
exchanger thermistor
(R21397)
(R3264)
Clip
Thermistor ASSY
(R21398)
[S40]
(R25521)
Relay for
compressor
(R25522)

Electrical Box Si001421EA
10 Removal Procedure
3
4
Disconnect the
connector [S80].
Pull out the clamp.
[S80]: four way valve coil
The cooling only models
have no harness for the
connector [S80] nor four way
valve coil.
5
6
Disconnect the
connector [S20].
Pull out the clamp.
[S20]: electronic expansion
valve coil
When reassembling, insert
the clamps of harnesses as
below.
7 Remove the 2 screws.
8 Remove the electrical
box.
Step Procedure Points
[S80]
Clamp
(R21401)
Clamp
[S20]
(R21402)
[S80] [S20]
(R21403)
(R21404)
Electrical box
(R21405)

Si001421EA PCBs
Removal Procedure 11
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 2 screws
and detach the earth /
ground wires.
2 Cut the clamp. The position of the clamp
varies depending on the
models.
3 Pull out the 3 clamps. Some models have only 2
clamps.
Earth / ground
screw
Earth / ground screw
(R21406)
Clamp
(R21407)
Clamp
Clamp
(R21408)

PCBs Si001421EA
12 Removal Procedure
4 Remove the screw and
remove the terminal
board.
5 Disconnect the
connectors [S201],
[S203].
[S201]: terminal board
[S203]: main PCB
Some models have no
connectors [S201] and
[S203].
6 Remove the 2 screws.
7 Unfasten the hook on
the back and remove
the electronic
component mounting
plate.
Step Procedure Points
Terminal board
(R21409)
[S203]
[S201]
(R21410)
(R21411)
Electronic
component
mounting
plate
Hook
(R21412)

Si001421EA PCBs
Removal Procedure 13
8
9
10
Disconnect the
connector [S206].
Remove the screw.
Unfasten the hook and
remove the demand
control PCB.
The demand controller as an
optional accessory has
[S204] and [S205] instead of
[S206].
[S206] / [S204][S205]: smart
meter
Some models have no
demand control PCB.
11
12
Remove the 7 screws.
Unfasten the 5 hooks
and remove the main
PCB.
Step Procedure Points
Hook
[S206]
(R21413)
Demand
control PCB
(R21414)
Hook
(R21415)
Main PCB
(R21416)

Partition Plate / Sound Blankets Si001421EA
14 Removal Procedure
5. Partition Plate / 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 partition
plate.
When reassembling, make
sure to fit the hook on the
bottom.
1 Remove the 2 screws
and remove the
partition plate.
2. Remove the sound
blankets.
Since the piping ports are
torn easily, remove the
sound blankets carefully.
1 Remove the sound
blanket (top upper).
(R21417)
Hole for the hook
Partition plate
(R21418)
Hook
(R21419)
Sound blanket
(top upper)
(R21420)

Si001421EA Partition Plate / Sound Blankets
Removal Procedure 15
2 Remove the sound
blanket (top lower).
3 Remove the sound
blanket (outer).
4 Remove the sound
blanket (inner).
Step Procedure Points
Sound blanket
(top lower)
(R21421)
Sound blanket (outer)
(R21422)
Sound blanket
(inner)
(R21423)

Electronic Expansion Valve Coil / Four Way Valve Si001421EA
16 Removal Procedure
6. Electronic Expansion Valve Coil / 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 Pull out the electronic
expansion valve coil.
The cooling only models
have no four way valve coil.
Electronic
expansion
valve coil
(R21424)

Si001421EA Electronic Expansion Valve Coil / Four Way Valve
Removal Procedure 17
2 Remove the screw and
remove the four way
valve coil.
3 Remove the terminal
cover.
4
5
Disconnect the harness
for overload protector.
Disconnect the
compressor lead wires.
6
7
Remove the sheets of
putty.
Heat up the every
brazed part and
disconnect the four way
valve.
Step Procedure Points
Four way valve coil
(R21425)
Terminal
cover
(R21426)
W (blue)
U (red)V (yellow)
Overload
protector
(R21427)
Putty
Brazed part
(R21428)

Compressor Si001421EA
18 Removal Procedure
7. Compressor
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.)
Since it may happen that the refrigerant oil in the compressor catches fire, prepare wet
cloth so as to extinguish fire immediately.
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.
Restore the piping by non-oxidation brazing.
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 terminal
cover.
2
3
Disconnect the harness
for overload protector.
Disconnect the
compressor lead wires.
Terminal
cover
(R21426)
W (blue)
U (red)V (yellow)
Overload
protector
(R21427)