Daikin RKM46QVMA User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
4.6/5.0/6.0/7.1 kW Class
Outdoor Unit
Inverter
Pair Type
Si001654EA

Service Manual
Removal Procedure
Outdoor Unit
zCooling Only zHeat Pump
RKM46QVMA RXF71QVMA
RKM50QVMA
RKM60QVMA RXM46QVMA
RKM71QVMA RXM50QVMA
RXM60QVMA
RXM71QVMA
RXV50QVMV
RXV60QVMV
RXV71QVMV

Si001654EA
Removal Procedure 1
Table of Contents
1. Outer Panels ...........................................................................................2
2. Outdoor Fan / Fan Motor.........................................................................6
3. Electrical Box ..........................................................................................8
4. Thermistor ASSY / PCB ........................................................................11
5. Partition Plate / Sound Blankets............................................................14
6. Electronic Expansion Valve Coil / Four Way Valve...............................16
7. Compressor...........................................................................................19
Note: The illustrations may be slightly different depending on the model.
The illustrations are for heat pump models as representative.

Outer Panels Si001654EA
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 6 screws,
and then the top panel.
2 Remove the 3 screws
of the terminal cover.
3 Unfasten the 2 hooks
and remove the
terminal cover.
When reassembling, make
sure that the 2 hooks are
securely fastened.
Top panel
(R22195)
Terminal
cover
(R22196)
Hook
(R22197) (R22198)

Si001654EA Outer Panels
Removal Procedure 3
4
5
Remove the 2 screws.
Pull the partition plate
(2) forward, then slide
to the right to remove it.
When reassembling, slide
the partition plate (2) to the
left to securely fasten the 2
hooks.
6 Release the outdoor
temperature thermistor
from the holder on the
protection net and the
slit.
When reassembling, the
outdoor temperature
thermistor should be in the
position marked by the
clamp.
7 Remove the 8 screws
of the right side panel.
Step Procedure Points
Partition
plate (2)
(R22199)
Hook
(R22200)
Slit
Holder
Clamp
Outdoor
temperature
thermistor
Back view
(R24113)
Right side panel (R22202)

Outer Panels Si001654EA
4Removal Procedure
8 Unfasten the hook and
remove the right side
panel.
9 Remove the 6 screws
of the front panel.
10
11
Unfasten the 3 hooks
on the left side.
Remove the front panel.
When reassembling, make
sure that the 3 hooks are
securely fastened.
Step Procedure Points
Hook
Right side panel
(R22203)
Front panel
(R22204)
Hook
Hook
(R22205)

Si001654EA Outer Panels
Removal Procedure 5
12 Remove the 4 screws
of the discharge grille.
13 Unfasten the 5 hooks
and remove the
discharge grille.
Step Procedure Points
Discharge grille
(R22206)
Hook
Discharge grille
Hook
(R22207)

Outdoor Fan / Fan Motor Si001654EA
6Removal 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 electrical
box cover.
2 Disconnect the
connector [S70] and
release the fan motor
lead wire from the slit.
[S70]: fan motor
When reassembling, put the
fan motor lead wire through
the back of the fan motor to
avoid any entanglement with
the outdoor fan.
3 Remove the nut, and
then the outdoor fan.
Nut size : M8
When reassembling, align
the mark of the fan rotor
with the D-cut section of the
motor shaft.
Electrical box cover
(R23188)
Fan motor lead wire [S70]
Slit
(R23189)
Lead wire Outdoor fan
(R3249)
Nut
Outdoor fan
D-cut
(R23190)
13 mm
(0.51 inch)
(R18965)

Si001654EA Outdoor Fan / Fan Motor
Removal Procedure 7
4 Remove the 2 screws,
and then the fan motor
fixing frame.
When reassembling, fit the 2
lower hooks into the bottom
frame.
5 Open the 3 hooks and
release the fan motor
lead wire.
6 Remove the 4 screws
from the fan motor.
The screws for the fan motor
are different depending on
the model.
Step Procedure Points
Fan motor fixing frame
(R23191)
Hook (R22212)
Fan motor lead wire
Hook (R23192)
Fan motor
(R23193)

Electrical Box Si001654EA
8Removal 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 3 screws,
and then the wire
fixture.
2 Remove the 7 screws
on the terminal board
and disconnect the
connecting wire and
power supply wire.
3 Disconnect the
connector [S20] and
pull out the clamp.
[S20]: electronic expansion
valve coil
When reassembling,
connect the connectors in
the following order.
(1) [S40]
(2) [S80] (Heat Pump only)
(3) [S20]
(4) [S70]
Wire fixture
(R23194)
Terminal board
Connecting wire Power supply wire
(R23195)
[S20]
Clamp
(R23196)

Si001654EA Electrical Box
Removal Procedure 9
4 Disconnect the
connector [S80], pull
out the clamp (1) and
cut the clamp (2).
[S80]: four way valve coil
The cooling only models
have no harness for [S80].
The position of the clamp (1)
varies depending on the
model.
Some models do not have
clamp (2).
When reassembling, fit the
clamps back to the hole to
make sure the wires do not
touch the four way valve.
5 Disconnect the
connector [S40].
[S40]: overload protector
For RX(K)M71QVMA, make
sure the relay connector for
compressor is under the
electrical box.
When reassembling, fit the
clamp back to the hole to
make sure the wires do not
touch the four way valve
pipe.
6 Disconnect the relay
connector for
compressor and pull out
the clamp.
Step Procedure Points
[S80] Clamp (1) Clamp (2)
(R23197)
[S40]
(R23198)
Electrical box
Relay connector (R24114)
Four way valve pipeClamp
Wire (R24115)
Relay connector Clamp (R23199)

Electrical Box Si001654EA
10 Removal Procedure
7 Open the sound blanket
(top) and detach the
discharge pipe
thermistor.
Be careful not to lose the
fixture for the thermistor.
8 Cut the clamp and pull
out the outdoor heat
exchanger thermistor.
The position of the clamp
and outdoor heat exchanger
thermistor varies depending
on the model.
Be careful not to lose the clip
for the thermistor.
9 Remove the 3 screws,
and then the electrical
box.
Step Procedure Points
Discharge pipe thermistor Sound blanket (top) (R23201)
(R20430)
Fixture
Clamp
Outdoor heat
exchanger
thermistor
(R23202)
Clip
(R3264)
Electrical box
(R23203)

Si001654EA Thermistor ASSY / PCB
Removal Procedure 11
4. Thermistor ASSY / 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 thermistor
ASSY.
1 Pull out the 2 clamps
and push the 2
projections of the
clamps from the back of
the electrical box and
pull them out.
2 Remove the earth/
ground screw.
3 Disconnect the 3
terminals for power
supply.
[HL1], [HN1], [S]: terminal board
Projection of
clamp
Clamp (R23204)
Earth/ground screw
(R24116)
Top view
[S]
[HL1]
[HN1]
(R23206)

Thermistor ASSY / PCB Si001654EA
12 Removal Procedure
4 Disconnect the
connector [S90].
[S90]: thermistors
5 Remove the 4 screws
of the terminal board
mounting plate ASSY.
6 Slide up and remove
the terminal board
mounting plate ASSY.
When reassembling, make
sure the hook is securely
fastened.
Step Procedure Points
[S90]
(R23207)
Terminal board
mounting plate
ASSY
(R23208)
Hook
(R23209)

Si001654EA Thermistor ASSY / PCB
Removal Procedure 13
7 Pull out the 5 clamps
and remove the
thermistor ASSY.
2. Remove the main PCB.
1
2
Remove the 9 screws
on the PCB.
Unfasten the 3 hooks.
3 Remove the main PCB.
Step Procedure Points
Clamp
Clamp Thermistor ASSY
Back view
(R24117)
Hook (R23210)
Main PCB (R24118)

Partition Plate / Sound Blankets Si001654EA
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, fit the
lower hook into the bottom
frame.
1
2
Remove the 2 screws.
Lift up the partition plate
and remove it.
2. Remove the sound
blankets.
The design of the sound
blankets varies depending
on the model.
Some models have an
additional sound blanket
(inner top).
1 Remove the sound
blanket (top).
2 Open and pull out the
sound blanket (outer).
Since piping ports are torn
easily, remove the sound
blanket carefully.
Partition plate
(R23212)
Hook
(R22236)
Sound blanket (top)
(R23213)
Sound blanket (outer) (R23214)

Si001654EA Partition Plate / Sound Blankets
Removal Procedure 15
3 Remove the sound
blanket (inner).
Step Procedure Points
Sound blanket (inner) (R23215)

Electronic Expansion Valve Coil / Four Way Valve Si001654EA
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 Remove the screw, and
then the four way valve
coil.
The cooling only models
have no four way valve coil.
Four way valve coil
(R23216)

Si001654EA Electronic Expansion Valve Coil / Four Way Valve
Removal Procedure 17
2 Pull out the electronic
expansion valve coil.
3 Remove the terminal
cover.
4
5
Remove the protection
bushing.
Disconnect the
compressor lead wires
and the overload
protector.
For RX(K)M71QVMA, the
wiring of the compressor
lead wires is slightly
different.
Step Procedure Points
Electronic
expansion
valve coil
(R23217)
Terminal cover
(R23218)
U (red)Protection bushing
V (yellow)
W (blue)
Overload
protector
(R22244)
V (yellow) U (red)
W (blue)
(R24119)

Electronic Expansion Valve Coil / Four Way Valve Si001654EA
18 Removal Procedure
6
7
Remove the putty.
Heat up the 4 brazed
parts and remove the
four way valve.
The location of the putties
varies depending on the
model.
Step Procedure Points
Brazed part
Putty
Four way valve
(R23219)