Daikin RKS42GVLT User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
Outdoor Unit
Inverter / Hybrid
Pair Type
4.2/5.0/6.0/7.1 kW Class
Si00-875

Service Manual
Removal Procedure
Outdoor Unit
zCooling Only zHeat Pump
RKS50FBVMA RKS42GVLT ARXS50E3V1B RXS42GVLT
RKS60FBVMA ARXS50G2V1B
RKS50G2V1B RXS50G2V1B
RKS50FVM RXS50FBV2C
RKS60FVM RKS50GVMG RYN50FV1A
RKS71FVM RKS60GVMG RXS50FBVMA RYN60FV1A
RKS71GVMG RXS60FBVMA
RKS50FVLT
RKS60FVLT RXS71FMV2C
RKS71FVLT
RXS50FVLT
RKS50FVMA RXS60FVLT
RKS60FVMA RXS71FVLT
RXS50FVMA
RXS60FVMA

Si00-875
Removal Procedure 1
Table of Contents
1. Removal of Outer Panels ........................................................................2
2. Removal of Outdoor Fan / Fan Motor .....................................................5
3. Removal of Electrical Box .......................................................................8
4. Removal of PCBs..................................................................................12
5. Removal of Sound Blankets / Thermistors............................................15
6. Removal of Four Way Valve .................................................................17
7. Removal of Electronic Expansion Valve ...............................................18
8. Removal of Compressor .......................................................................19
Note: The illustrations may be slightly different depending on the model.
The illustrations are for heat pump models as representative.

Removal of Outer Panels Si00-875
2Removal Procedure
1. Removal of Outer Panels
Procedure 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 panels.
Take care not to cut your
finger by the fins of the
outdoor heat exchanger.
1Remove the 4 screws
and lift the top panel.
2Remove the 4 screws
and remove the
discharge grille.
Slide the discharge grille
upward and remove it.
The discharge grille has 4
hooks.
Top panel
(R12283)
(R12315)
Discharge grille
(R5245)
(R5246)

Si00-875 Removal of Outer Panels
Removal Procedure 3
3Remove the 6 screws
of the front panel.
4Push the front panel
and lift the shield plate
to unfasten the hooks.
5Unfasten the left side
hooks, and then the
right side hook.
Remove the front panel.
Lift the front panel while
pushing the left side panel
inward.
Lift the front panel and
unfasten the right side hook.
Step Procedure Points
Front panel
(R12284)
Shield plate
(R13626)
(1) Push the
front panel.
(2) Lift the shield
plate upward.
(R5249)
(R5250)

Removal of Outer Panels Si00-875
4Removal Procedure
When reassembling, fit the
right side of the front panel
first.
2. Remove the stop valve
cover.
1Remove the screw of
the stop valve cover.
2Pull the stop valve
cover downward to
unfasten the hooks and
remove it.
The stop valve cover has 6
hooks.
Step Procedure Points
(R5251)
Stop valve cover
(R5252)
(R5253)
(R5254)

Si00-875 Removal of Outdoor Fan / Fan Motor
Removal Procedure 5
2. Removal of Outdoor Fan / Fan Motor
Procedure 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.
Preparation
Remove the top panel and
the front panel according to
the “Removal of Outer
Panels”.
This procedure is not
necessary to remove the
outdoor fan only.
1Remove the screw of
the shield plate.
2Unfasten the 2 hooks
and remove the shield
plate.
3Unfasten the 4 hooks of
the electrical box cover
and remove it.
(R5255)
Shield plate
Hook (R12029)
Electrical
box cover
(R5257)
(R5258)

Removal of Outdoor Fan / Fan Motor Si00-875
6Removal Procedure
2. Remove the fan motor.
1Disconnect the
connector for the fan
motor [S70].
2Release the fan motor
lead wire from the 7
hooks.
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.
Step Procedure Points
[S70]
(R5259)
Fan motor
lead wire
(R5260)
(R5262)
Outdoor fan
10 mm
(R12236)
(R5263)

Si00-875 Removal of Outdoor Fan / Fan Motor
Removal Procedure 7
4Remove the 2 lower
screws from the fan
motor first.
Be sure to remove the lower
screws first. If the upper
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.
5Then, remove the 2
upper screws.
6Release the fan motor
lead wire from the 2
hooks and pull the fan
motor out.
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
(R5264)
Fan motor
(R5265)
Fan motor lead wire

Removal of Electrical Box Si00-875
8Removal Procedure
3. Removal of Electrical Box
Procedure 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.
Preparation
Remove the top panel and
the front panel according to
the “Removal of Outer
Panels”.
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 wires.
Disconnect the power
supply wire and the
connection wire.
4Disconnect the 2 earth
wires.
(R17060)
Shield
plate
(R17021)
Hook
(R17239)
Earth wire
Power supply wire
Connection wire
Earth wire
(R17240)

Si00-875 Removal of Electrical Box
Removal Procedure 9
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
(R17241)
Right
side
panel
(R17242)
(R5272)
Hook
(R13586)
Hook

Removal of Electrical Box Si00-875
10 Removal Procedure
8Disconnect the
connectors 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 Release the clamp by
pliers.
Some models do not have
the clamp.
12 Detach the clamp and
release the thermistor
lead wires from the
hook.
Step Procedure Points
(R17137)
[S40] [S20] [S90] [S80]
Thermistor ASSY harness
Electronic
expansion
valve coil
harness
Fan
motor
lead wire
(R17138)
(R17139)
(R5277)
(R17140)
Thermistor lead wire
Hook
Fixing position for the
thermistor harness
When reassembling, insert
the clamp into the small
hole.

Si00-875 Removal of Electrical Box
Removal Procedure 11
13 Remove the screw.
14 Release the harness of
the outdoor
temperature thermistor
from the hook.
15 Lift and remove the
electrical box.
Step Procedure Points
(R12316)
(R9403)
(R13587)
Electrical box

Removal of PCBs Si00-875
12 Removal Procedure
4. Removal of PCBs
Procedure 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.
Preparation
Remove the electrical box
according to the “Removal of
Electrical Box”.
2Detach the 4 clamps
with pliers and remove
the service monitor
PCB.
3Remove the screws of
the terminal board and
the earth wire.
(R16707)
Service monitor PCB
[S52] [S102]
Clamp
(R16708)
(R17030)
Terminal board
Earth wire

Si00-875 Removal of PCBs
Removal Procedure 13
4Unfasten the hook on
the right.
5Open the terminal
board.
6Disconnect the
harnesses.
Pull out the relay
connector for standby
electricity saving from
the terminal board.
1: Black
2: White
3: Red
L1: Black
L2: Brown
N1: White
N2: Blue
Some models have no relay
connector for standby
electricity saving.
7Disconnect the 2
connectors for the
reactor [HR1] [HR2].
Step Procedure Points
(R5283)
(R5284)
(R13542)
N2
N1
L1
321
L2
Relay
connector for
standby
electricity
saving
(R11473)
[HR2]
[HR1]

Removal of PCBs Si00-875
14 Removal Procedure
8Remove the 3 screws
of the main PCB.
9Unfasten the 4 hooks.
10 Lift up and remove the
main PCB.
Step Procedure Points
Main PCB
(R5287)
(R5288)
Hook
Main PCB
(R5289)

Si00-875 Removal of Sound Blankets / Thermistors
Removal Procedure 15
5. Removal of Sound Blankets / Thermistors
Procedure 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)

Removal of Sound Blankets / Thermistors Si00-875
16 Removal Procedure
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) (R16778)
(R17061)
Discharge pipe thermistor
(R12287)
Clip
Outdoor heat
exchanger
thermistor
(R5292)
Clamp

Si00-875 Removal of Four Way Valve
Removal Procedure 17
6. Removal of Four Way Valve
Procedure 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 and
remove the four way
valve coil.
Some models do not have a
four way valve coil.
Warning
Be careful not to get yourself
burnt with the pipes and other
parts that are heated by the
gas brazing machine.
Warning
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.) For the sake
of this, wrap the four way
valve with wet cloth and
provide water so that the
cloth does not dry.
Note:
Never use a metal saw to cut
pipes because the sawdust
may enter 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.
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.
2Heat up the brazed part
of the four way valve
and disconnect.
3Heat up every brazed
part in turn and
disconnect.
Four way
valve coil
Four way
valve
(R5297)
(R5298)
(R5299)

Removal of Electronic Expansion Valve Si00-875
18 Removal Procedure
7. Removal of Electronic Expansion Valve
Procedure Warning Be sure to wait for 10 minutes or more after turning off all power
supplies before disassembling work.
Step Procedure Points
1Pull out the electronic
expansion valve coil.
2Remove the sheets of
putty.
Warning
Be careful not to get yourself
burnt with the pipes and other
parts that are heated by the
gas brazing machine.
Warning
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.
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.
3Heat up the 2 brazed
parts of the electronic
expansion valve and
remove it.
Electronic expansion valve coil
(R2737)
(R11398)
Electronic expansion valve
(R2739)