Daikin RKS25EBVMV User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
Outdoor Unit
Inverter
Pair Type
2.5/3.5/4.2 kW Class
Si001267EB

Service Manual
Removal Procedure
Outdoor Unit
zCooling Only zHeat Pump
RKS25EBVMV RXS25EBVMV
RKS35EBVMV RXS35EBVMV
RKS25GVM4 RXS25GVMV
RKS35GVM4 RXS35GVMV
RKS25GVMV
RKS35GVMV
RKS25JVMG
RKS35JVMG
RKD25GVMV
RKD35GVMV
RKD42GVMV
RKD25HVMV
RKD35HVMV
RKD42HVMV

Si001267EB
Removal Procedure 1
Table of Contents
1. Outer Panels ...........................................................................................2
2. Fan Motor................................................................................................4
3. Electrical Box ..........................................................................................6
4. PCB.........................................................................................................8
5. Reactor / Partition Plate ..........................................................................9
6. Sound Blankets .....................................................................................10
7. Four Way Valve.....................................................................................11
8. Compressor...........................................................................................13
Note: The illustrations may be slightly different depending on the model.
The illustrations are for heat pump models as representative.

Outer Panels Si001267EB
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 screw of
the stop valve cover.
Pull down the stop
valve cover and remove
it.
The stop valve cover is
united with the shield plate.
When reassembling, make
sure to fit the 5 hooks.
3
4
5
Remove the 3 screws
and lift the top panel.
Remove the drip proof
plate.
Remove the 4 screws
and remove the
discharge grille.
The discharge grille has 4
hooks.
6Remove the 8 screws
and remove the front
panel.
The front panel has 4 hooks.
Stop
valve
cover
(R17214)
(R17767)
Discharge
grille
Drip proof plate
Top panel
(R7193)
(R7194)
Front panel
(R7195)
Hook

Si001267EB Outer Panels
Removal Procedure 3
7Remove the 6 screws
on the right side and the
rear side.
Take care not to cut your
finger by the fins of the
outdoor heat exchanger.
8Release the outdoor
temperature thermistor.
9Lift up the guard net
and remove it.
10 Remove the screw of
the right side panel.
When reassembling, make
sure to fit the hooks on the
right and rear side.
11 Lift up the right side
panel and remove it.
Step Procedure Points
(R17219)
Outdoor temperature thermistor
Guard net
(R17220)
Hook
Right side
panel
(R7212)

Fan Motor Si001267EB
4Removal Procedure
2. 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 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.
2Remove the outdoor
fan.
3Disconnect the
connector [S70].
[S70]: fan motor
4Cut the clamp and
release the fan motor
lead wire from the hook.
D-cut
(R7197)
10 mm
(0.39 inch)
(R18954)
[S70]
(R7199)
Fan motor lead wire
Clamp
(R17217)

Si001267EB Fan Motor
Removal Procedure 5
5Open the 2 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).
6Remove the 4 screws
and remove the fan
motor.
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.
7Remove the screw and
remove the fan motor
fixing frame.
When reassembling, fit the
lower hooks into the bottom
frame.
Step Procedure Points
(R16464)
(R3249)
Lead wire Outdoor fan
Fan motor
(R7202)
(R17218)
Fan motor fixing frame

Electrical Box Si001267EB
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
1Disconnect the 2
connectors for the
reactor.
2Disconnect the
connector [S30].
[S30]: compressor
3Disconnect the
connector [S40].
[S40]: overload protector
4Disconnect the
connector [S20].
[S20]: electronic expansion
valve coil
5Disconnect the
connector [S80].
[S80]: four way valve coil
The cooling only models
have no harness for [S80].
When reassembling,
connect the connectors in
the following order.
(1) [S80]
(2) [S20]
(3) [S40]
(4) [S30]
(5) reactor
When reassembling, set the
harnesses of the four way
valve coil and electronic
expansion valve coil in front
of the compressor lead wire.
(R17221)
[S30]
Reactor
(R17222)
[S40][S20]
(R7219)
[S80]

Si001267EB Electrical Box
Removal Procedure 7
6Release the discharge
pipe thermistor.
Be careful not to lose the
fixture for the thermistor.
7Cut the clamp. Be careful not to lose the clip
for the thermistor.
8Pull out the outdoor
heat exchanger
thermistor.
9Lift and remove the
electrical box.
Step Procedure Points
(R16457)
Discharge pipe thermistor
(R18789)
Fixture
(R17223)
Clamp
Outdoor heat exchanger
thermistor
(R3264)
Clip
(R16473)
Electrical Box

PCB Si001267EB
8Removal Procedure
4. PCB
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
and detach the earth /
ground wires.
You can remove the main
PCB when you disconnect
the lead wires on the
terminal board without
removing the electrical box.
2Remove the 4 screws
on the main PCB.
3Unfasten the 3 hooks
on the upper side.
4Lift and pull out the
main PCB.
(R19539)
Screw
Earth / ground
wire
(R16485)
Hook

Si001267EB Reactor / Partition Plate
Removal Procedure 9
5. Reactor / Partition Plate
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 reactor.
2Remove the 2 screws.
3Remove the partition
plate.
The partition plate has 2
hooks on the lower side.
When reassembling, fit the
lower hooks into the bottom
frame.
Reactor
(R11879)
Partition plate
(R12273)
Hook (R13508)

Sound Blankets Si001267EB
10 Removal Procedure
6. Sound Blankets
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 (outer).
The design of sound
blankets varies depending
on the model.
Since the piping ports are
torn easily, remove the
sound blanket carefully.
2Remove the sound
blanket (top).
3Open and pull out the
sound blanket (inner).
4Pull out the sound
blanket (bottom).
Some models have no
sound blanket (bottom).
(R7229)
Sound blanket (outer)
(R7231)
Sound blanket
(top)
(R7232)
Sound blanket (inner)
Sound blanket
(bottom)
(R11888)

Si001267EB Four Way Valve
Removal Procedure 11
7. 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
1Pull out the electronic
expansion valve coil.
The cooling only models
have no four way valve.
Electronic
expansion
valve coil
(R7233)

Four Way Valve Si001267EB
12 Removal Procedure
2Remove the screw and
remove the four way
valve coil.
3Remove the sheets of
putty.
4Heat up the brazed
parts and withdraw the
piping with pliers.
Step Procedure Points
Four way valve coil
(R7247)
(R7248)
Four way valve
(R7249)
(R7250)

Si001267EB Compressor
Removal Procedure 13
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.
2
3
Pull out the compressor
lead wires.
Remove the overload
protector.
Terminal cover
(R7234)
V
W
U
Red (U)
Yellow (V) Blue (W)
Overload
protector
(R19540)

Compressor Si001267EB
14 Removal Procedure
4Remove the 2 nuts of
the compressor.
5Heat up the brazed part
of the discharge side
and disconnect it.
6Heat up the brazed part
of the suction side and
disconnect it.
7Lift and remove the
compressor.
Step Procedure Points
Compressor
(R11889)
(R17227)
Discharge side

Revision History
Month / Year Version Revised contents
09 / 2012 Si001267 First edition
11 / 2013 Si001267EA Model addition: RKS25/35GVM4, RKS25/35GVMV, RKS25/35JVMG
02 / 2014 Si001267EB Model addition: RXS25/35GVMV, RKD25/35/42HVMV

Head Office:
Umeda Center Bldg., 2-4-12, Nakazaki-Nishi,
Kita-ku, Osaka, 530-8323 Japan
Tokyo Office:
JR Shinagawa East Bldg., 2-18-1, Konan,
Minato-ku, Tokyo, 108-0075 Japan
http://www.daikin.com
All rights reserved
c
Warning
zDaikin products are manufactured for export to numerous countries throughout the world. Prior to
purchase, please confirm with your local authorised importer, distributor and/or retailer whether this
product conforms to the applicable standards, and is suitable for use, in the region where the product
will be used. This statement does not purport to exclude, restrict or modify the application of any local
legislation.
zAsk a qualified installer or contractor to install this product. Do not try to install the product yourself.
Improper installation can result in water or refrigerant leakage, electrical shock, fire or explosion.
zUse only those parts and accessories supplied or specified by Daikin. Ask a qualified installer or
contractor to install those parts and accessories. Use of unauthorised parts and accessories or
improper installation of parts and accessories can result in water or refrigerant leakage, electrical
shock, fire or explosion.
zRead the User's Manual carefully before using this product. The User's Manual provides important
safety instructions and warnings. Be sure to follow these instructions and warnings.
If you have any enquiries, please contact your local importer, distributor and/or retailer.
Cautions on product corrosion
1. Air conditioners should not be installed in areas where corrosive gases, such as acid gas or alkaline gas, are produced.
2. If the outdoor unit is to be installed close to the sea shore, direct exposure to the sea breeze should be avoided. If you need to install
the outdoor unit close to the sea shore, contact your local distributor.
Dealer
z
Specifications, designs and other content appearing in this brochure are current as of February 2014 but subject to change without notice.
Si001267EB
02/2014 AK.B