Daikin RKD50GVMV User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
5.0/6.0/7.1 kW Class
Outdoor Unit
Inverter
Pair Type
Si001270EB

Service Manual
Removal Procedure
Outdoor Unit
zCooling Only zHeat Pump
RKD50GVMV RXD50BVMV
RKD60GVMV RXD60BVMV
RKD71GVMV RXD71BVMV
RKD50HVMV RXD50HVMV
RKD60HVMV RXD60HVMV
RKD71HVMV RXD71HVMV

Si001270EB
Removal Procedure 1
Table of Contents
1. Outer Panels ...........................................................................................2
2. Outdoor Fan / Fan Motor.........................................................................4
3. PCBs / Electrical Box ..............................................................................6
4. Reactor..................................................................................................11
5. Thermistors / Sound Blankets ...............................................................12
6. Four Way Valve.....................................................................................14
7. Electronic Expansion Valve...................................................................16
8. Compressor...........................................................................................18
Note: The illustrations may be slightly different depending on the model.
The illustrations are for heat pump models as representative.

Outer Panels Si001270EB
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
1Remove the 4 screws
and lift the top panel.
The discharge grille has 4
hooks.
2Remove the 4 screws
and remove the
discharge grille.
3Remove the 6 screws
of the front panel.
4Push the front panel
and lift the shield plate
to unfasten the hooks.
Top panel
(R17523)
Discharge grille
(R2679)
Front panel
(R2680)
Shield plate
(R16560)
(2) Lift the shield
plate upwards.
(1) Push the
front panel.

Si001270EB Outer Panels
Removal Procedure 3
5Unfasten the left side
hooks, and then the
right side hook.
6Remove the front panel.
7Remove the screw of
the stop valve cover.
8Pull the stop valve
cover downward to
unfasten the 6 hooks
and remove it.
Step Procedure Points
(R17719)
Hook
Hook
(R5252)
Stop valve
cover
(R17720)
Hook
Hook

Outdoor Fan / Fan Motor Si001270EB
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
1Remove the screw of
the shield plate.
2Unfasten the 2 hooks
and remove the shield
plate.
3Release the 4 hooks of
the electrical box cover
and remove it.
4Disconnect the
connector [S70].
[S70]: fan motor
5The illustration shows
arrangement of the fan
motor lead wire.
(R17721)
Shield plate
Hook
Electrical
box cover
(R2690)
[S70]
(R2692)
Fan motor lead wire (R2693)

Si001270EB Outdoor Fan / Fan Motor
Removal Procedure 5
6Remove the nut of the
outdoor fan.
Nut size: M6
7Remove the outdoor
fan.
When reassembling, align
the mark of the outdoor
fan with the D-cut section of
the motor shaft.
8Remove the 2 lower
screws from the fan
motor first.
Be sure to remove the lower
screws first. If the top screws
are removed first, the fan
motor may tilt down or fall
and cause injury because its
center of gravity is shifted to
the front.
9Then, remove the 2
upper screws.
10 Release the fan motor
lead wire from the 2
hooks and pull the fan
motor out.
Step Procedure Points
(R17525)
Outdoor fan
10 mm
(0.39 inch)
(R18954)
Fan motor
(R2696)
(R17736)
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.

PCBs / Electrical Box Si001270EB
6Removal Procedure
3. PCBs / 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.
1
2
Remove the 4 screws
and disconnect the
connecting wire and the
power supply wire.
Remove the 2 screws
and detach the earth /
ground wires.
3Remove the screw of
the electrical box.
When reassembling, insert
the upper hook and the 2
lower hooks back into place.
4Remove the 3 screws
of the right side panel.
5Remove the right side
panel.
2. Remove the service
monitor PCB.
[S52]: [S51] on main PCB
[S102]: [S101] on main PCB
1Release the harness
from the hook.
2Disconnect the
connectors [S52]
[S102] from the service
monitor PCB.
3Remove the service
monitor PCB.
(R19203)
Terminal board
Connecting
wire
Power supply
wire
Earth / ground
wire
(R17526)
Right side
panel
(R7028)
Hook
(R7026)
Hook
(R19337)
Hook
[S52]
Service monitor PCB
[S102]

Si001270EB PCBs / Electrical Box
Removal Procedure 7
3. Remove the main PCB.
Power supply PCB
[HL]: terminal board
[HE2]: earth / ground wire
[HAC1]: [AC1] on main PCB
[HE1]: [E] on main PCB
The cooling only models do
not have the harness for
[S80].
[S20]: electronic expansion valve
[S40]: overload protector
[S80]: four way valve coil
[S90]: thermistors
When reassembling, insert
each clamp into the holes as
below.
When reassembling, the
thermistor harness should
be placed between the
electrical box and the reactor
harness as below.
1
2
Remove the screw of
the cable way board.
Unfasten the hook and
open the cable way
board.
3Disconnect the
harnesses from the
power supply PCB.
4Disconnect the
connectors and pull out
each clamp of the front
side.
Step Procedure Points
Cable way board
(R19340)
(R19338)
Hook
[HE1]
[HE2] [HL]
[HAC1]
(R17725)
Reactor
harness
Thermistor
ASSY
(R17727)
Reactor harness
Thermistor
ASSY
Electronic
expansion valve
(R17724)
Power supply PCB
[S40]
[S20] [S80]
[S90] Clamp (R19339)

PCBs / Electrical Box Si001270EB
8Removal Procedure
5Remove the screw of
the main PCB.
6Unfasten the 2 hooks
and release the main
PCB from the ditch of
the front side.
7Disconnect the
harnesses [S10] [AC2]
while lifting the main
PCB.
8Disconnect the
connectors [S51]
[S101].
Step Procedure Points
Main PCB
Ditch
(R2709)
[S10] [AC2]
(R17728)
[S10] [AC2]: terminal board
(R2711)
[S101] [S51]
[S51] [S101]: service monitor
PCB

Si001270EB PCBs / Electrical Box
Removal Procedure 9
9Disconnect the
connectors.
[S31]: CN14 on SPM
[S32]: CN11 on SPM
[S33]: [S34] on MID
[S71]: [S72] on MID
[S91]: radiation fin thermistor
[H1] [H2]: diode bridge
10 Remove the main PCB.
4. Remove the electrical
box.
1Disconnect the relay
connector for the
compressor.
2Release the clamp with
pliers.
Step Procedure Points
[S91]
[S31] [S71] [S33] [S32]
(R2712)
[H1]
(yellow)
[H2]
(blue)
(R16434)
(R16435)

PCBs / Electrical Box Si001270EB
10 Removal Procedure
3Disconnect the 2
connectors for the
reactor.
4Pull the clamp and draw
the thermistor harness
out from the back of the
electrical box.
5Remove the screw of
the electrical box.
6Lift up the electrical box
and remove it.
Step Procedure Points
(
R2716
)
(R2717)
(R17729)
Electrical box
(R16438)

Si001270EB Reactor
Removal Procedure 11
4. Reactor
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1Release the clamp of
the compressor
harness with pliers.
2Remove the 2 screws
of the partition plate.
3Lift up the partition plate
and remove it.
The partition plate is fixed to
the bottom frame with a
hook.
4Remove the screw and
remove the reactor.
(R2722)
Partition plate
(R2723)
(R7027)
Hook
(R2726)
Reactor

Thermistors / Sound Blankets Si001270EB
12 Removal Procedure
5. Thermistors / Sound Blankets
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1Release the discharge
pipe thermistor.
Be careful not to lose the
fixture for the thermistor.
2Cut the 2 clamps and
pull out the outdoor
heat exchanger
thermistor.
When reassembling, tie the
harnesses of electronic
expansion valve coil and
outdoor heat exchanger
thermistor with a clamp as
illustrated.
Some models have no lower
clamp.
(R18789)
Fixture
Discharge pipe thermistor (R19202)
(R17730)
Outdoor heat exchanger
thermistor
Electronic expansion
valve coil
Clamp

Si001270EB Thermistors / Sound Blankets
Removal Procedure 13
3Remove the sound
blanket (body outer).
The design of sound
blankets varies depending
on the model.
Since the piping ports on the
sound blanket (body outer)
are torn easily, remove the
blanket carefully.
4Remove the sound
blanket (top upper).
5Remove the sound
blanket (top lower).
Some models have no
sound blanket (top lower).
6Remove the sound
blanket (body inner).
Since the piping ports on the
sound blanket (body inner)
are torn easily, remove the
blanket carefully.
Step Procedure Points
Sound blanket
(body outer)
(R17528)
(R17529)
Sound blanket
(top upper)
(R17530)
Sound blanket
(top lower)
(R17731)
Sound blanket
(body inner)

Four Way Valve Si001270EB
14 Removal Procedure
6. 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
1Remove the screw and
remove the four way
valve coil.
Some models do not have a
four way valve coil.
Four way valve
Four way valve coil
(R2734)

Si001270EB Four Way Valve
Removal Procedure 15
Step Procedure Points
2Heat up the brazed part
of the four way valve
and disconnect.
3
4
Heat up every brazed
part in turn and
disconnect.
Remove the four way
valve.
(R2735)
(R2736)

Electronic Expansion Valve Si001270EB
16 Removal Procedure
7. Electronic Expansion 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
1Pull out the electronic
expansion valve coil.
(R2737)
Electronic expansion valve coil

Si001270EB Electronic Expansion Valve
Removal Procedure 17
2Remove the sheets of
putty.
3Heat up the 2 brazed
parts of the electronic
expansion valve and
remove it.
Step Procedure Points
(R2738)
(R2739)
Electronic expansion valve

Compressor Si001270EB
18 Removal Procedure
8. 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.
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
1Remove the terminal
cover.
(R17532)
Terminal cover