Daikin RKS50FVMV User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
Outdoor Unit
Inverter
Pair Type
5.0/6.0 kW Class
Si001269EA

Service Manual
Removal Procedure
Outdoor Unit
zCooling Only zHeat Pump
RKS50FVMV RXS50FVMV
RKS60FVMV RXS60FVMV
RXS50GVMV
RXS60GVMV

Si001269EA
Removal Procedure 1
Table of Contents
1. Outer Panels ...........................................................................................2
2. Outdoor Fan / Fan Motor.........................................................................4
3. Electrical Box ..........................................................................................6
4. PCBs .....................................................................................................10
5. Sound Blankets / Thermistors ...............................................................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 Si001269EA
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 4 screws
and lift the top panel.
Remove the 4 screws
and remove the
discharge grille.
The discharge grille has 4
hooks.
3Remove the 6 screws
of the front panel.
4Push the front panel
inward and lift the
shield plate to unfasten
the hooks.
Top panel
(R17557)
Discharge grille
(R5246)
Front panel
(R12284)
Shield plate
(R13626)
(1) Push the
front panel.
(2) Lift the shield
plate upward.

Si001269EA Outer Panels
Removal Procedure 3
5Unfasten the left side
hooks, and then the
right side hook of the
front panel.
When reassembling, fit the
right side of the front panel
first.
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
(R17558)
Hook
Hook
Stop valve cover
(R5252)
(R17732)
Hook
Hook

Outdoor Fan / Fan Motor Si001269EA
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 electrical box
cover.
1
2
Remove the screw of
the shield plate.
Unfasten the 2 hooks
and remove the shield
plate.
3Unfasten the 4 hooks of
the electrical box cover
and remove it.
2. Remove the fan motor. [S70]: fan motor
When reassembling, insert
the clamp into the hole as
below.
1Disconnect the
connector [S70] and
pull out the clamp at the
front.
2Release the fan motor
lead wire from the 7
hooks.
(R17559)
Shield plate
Hook
Electrical
box cover
(R5257)
[S70]
(R17737)
Fan
motor
lead wire
(R17750)
Fan motor
lead wire
(R17738)

Si001269EA Outdoor Fan / Fan Motor
Removal Procedure 5
3Remove the nut of the
outdoor fan.
Nut size: M6
When reassembling, align
the mark of the outdoor
fan with the D-cut section of
the motor shaft.
4Remove the outdoor
fan.
5Remove 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.
6Then, remove the 2
upper screws.
7Release the fan motor
lead wire from the 2
hooks and pull out the
fan motor.
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.
Step Procedure Points
(R17560)
Outdoor fan
10 mm
(0.39 inch)
(R18954)
(R5264)
Fan motor
(R17733)
Fan motor lead wire

Electrical Box Si001269EA
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
1Remove the 2 screws
of the shield plate.
2Slide the shield plate
upward to unfasten the
hook on the bottom left,
and then remove the
shield plate.
3Remove all the screws
of the terminal boards
and of the earth /
ground wires.
Disconnect the power
supply wire and the
connecting wire.
4Remove the 2 screws
and detach the earth /
ground wires.
(R17060)
Shield
plate
(R17021)
Hook
(R20181)
Power supply wire
Earth / ground
wire
Connecting wire
(R20182)
Earth / ground
wire

Si001269EA Electrical Box
Removal Procedure 7
5Remove the 3 screws
of the right side panel.
6Remove the screw of
the electrical box.
7Unfasten the hooks and
remove the right side
panel.
When reassembling, insert
the upper hook and the 2
lower hooks back into place.
Step Procedure Points
(R17734)
Right
side
panel
(R5272)
Hook
(R13586)
Hook

Electrical Box Si001269EA
8Removal Procedure
8Disconnect the
connectors and pull out
each clamp of the front
side.
[S20]: electronic expansion
valve coil
[S40]: overload protector
[S80]: four way valve coil
[S90]: thermistors
When reassembling, insert
each clamp into the hole as
below.
9Disconnect the relay
connector for the
compressor.
10 Release the clamp.
11 Detach the clamp and
release the thermistor
lead wires from the
hook.
12 Remove the screw.
Step Procedure Points
(R17137)
[S40] [S20] [S90] [S80]
Thermistor ASSY harness
Electronic
expansion
valve coil
harness
Fan
motor
lead wire
(R17138)
(R17139)
(R17140)
Thermistor lead wire
Hook
Fixing position for the
thermistor harness
When reassembling, insert
the clamp into the small
hole.
(R12316)

Si001269EA Electrical Box
Removal Procedure 9
13 Release the harness of
the outdoor
temperature thermistor
from the hook.
14 Lift and remove the
electrical box.
Step Procedure Points
(R9403)
(R13587)
Electrical box

PCBs Si001269EA
10 Removal Procedure
4. PCBs
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1Disconnect the
connectors [S52]
[S102] from the service
monitor PCB.
[S52]: control PCB
[S102]: control PCB
2Detach the 4 clamps
with pliers and remove
the service monitor
PCB.
3
4
Remove the screws of
the terminal board and
the earth / ground wire.
Unfasten the hook on
the right.
5
6
Open the terminal
board.
Disconnect the
harnesses.
1: Black
2: White
3: Red
L1: Black
L2: Brown
N1: White
N2: Blue
(R16707)
Service monitor PCB
[S52] [S102]
Clamp
(R16708)
(R20183)
Terminal board
Hook
Earth / ground
wire
L2
N2
123L1 N1 (R17562)

Si001269EA PCBs
Removal Procedure 11
7Disconnect the 2
connectors [HR1]
[HR2].
[HR1] [HR2]: reactor
8Remove the 3 screws
of the main PCB.
9Unfasten the 4 hooks.
10 Lift up and remove the
main PCB.
Step Procedure Points
(R11473)
[HR2]
[HR1]
Main PCB
(R17735)
Hook

Sound Blankets / Thermistors Si001269EA
12 Removal Procedure
5. Sound Blankets / Thermistors
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1Remove the sound
blanket (top upper).
The design of the sound
blankets varies depending
on the model.
2Remove the sound
blanket (top lower).
3Remove the sound
blanket (back).
(R16962)
Sound blanket
(top upper)
Sound blanket
(top lower)
(R16783)
Sound blanket
(back)
(R11161)

Si001269EA Sound Blankets / Thermistors
Removal Procedure 13
4Remove the sound
blanket (outer).
Since the piping ports are
torn easily, remove the
sound blankets carefully.
5Remove the sound
blanket (inner).
6Release the discharge
pipe thermistor.
Be careful not to lose the
clip for the thermistor.
7Cut the clamp and pull
out the outdoor heat
exchanger thermistor.
Step Procedure Points
(R17062)
Sound blanket
(outer)
Sound blanket
(inner) (R20212)
(R17061)
Discharge pipe thermistor
(R12287)
Clip
(R5292)
Clamp
Outdoor heat
exchanger
thermistor

Four Way Valve Si001269EA
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.
The cooling only models
have no four way valve coil.
Four way
valve coil
Four way
valve
(R5297)

Si001269EA Four Way Valve
Removal Procedure 15
2Heat up the brazed part
of the four way valve
and disconnect it.
3Heat up every brazed
part in turn and
disconnect it.
Step Procedure Points
(R5298)
(R5299)

Electronic Expansion Valve Si001269EA
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.)
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
1Pull out the electronic
expansion valve coil.
2Remove the sheets of
putty.
Electronic expansion valve coil
(R2737)
(R11398)

Si001269EA Electronic Expansion Valve
Removal Procedure 17
3Heat up the 2 brazed
parts of the electronic
expansion valve and
remove it.
Step Procedure Points
Electronic expansion valve
(R2739)

Compressor Si001269EA
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.
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
1Remove the terminal
cover.
2Disconnect the lead
wires of the
compressor.
Terminal cover
(R5302)
Red (U)
Yellow (V) Blue (W)
(R12436)