Daikin RXD25DVMV User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
Outdoor Unit
Inverter
Pair Type
2.5/3.5 kW Class
Si001266EA

Service Manual
Removal Procedure
Outdoor Unit
zHeat Pump
RXD25DVMV
RXD35DVMV
RXD25HVMV
RXD35HVMV

Si001266EA
Removal Procedure 1
Table of Contents
1. Outer Panels / Fan Motor........................................................................2
2. Electrical Box ..........................................................................................7
3. PCB.........................................................................................................9
4. Reactor / Partition Plate ........................................................................10
5. Sound Blankets .....................................................................................11
6. Four Way Valve.....................................................................................12
7. Compressor...........................................................................................15
Note: The illustrations may be slightly different depending on the model.

Outer Panels / Fan Motor Si001266EA
2Removal Procedure
1. Outer Panels / 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 outer panels.
The stop valve cover is
united with the shield plate.
When reassembling, make
sure to fit the 5 hooks.
1
2
Remove the screw of
the stop valve cover.
Pull down the stop
valve cover and remove
it.
3Remove the 3 screws
and lift the top panel.
4Remove the drip proof
plate.
(R3237)
Stop
valve
cover
Shield plate
Hook
(R17312)
Top panel
(R19325)
Drip proof plate

Si001266EA Outer Panels / Fan Motor
Removal Procedure 3
5Disconnect the
connector [S70].
[S70]: fan motor
6Remove the 6 screws
of the front panel.
7Remove the front panel. The front panel has 4 hooks.
The fan motor is united with
the front panel.
Step Procedure Points
[S70] (R17514)
Front panel
(R19326)
Hook
(R17516)

Outer Panels / Fan Motor Si001266EA
4Removal Procedure
2. Remove the fan motor. Nut size: M6
When reassembling, align
the mark of the outdoor
fan with the D-cut section of
the motor shaft.
1Remove the nut and
remove the outdoor fan.
2
3
Remove the 2 screws
and lift the bell mouth to
unfasten the hooks.
Remove the bell mouth.
4Open the hooks and
release the fan motor
lead wire.
Screws: M4 × 16
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).
5Remove the 4 screws
and remove the fan
motor.
Step Procedure Points
D-cut
(R17518)
Outdoor
fan
10 mm
(0.39 inch)
(R18954)
Hook
(R17517)
Bell mouth
Screw
Fan motor
Fan motor
lead wire (R17520)
(R3249)
Lead wire Outdoor fan

Si001266EA Outer Panels / Fan Motor
Removal Procedure 5
6Remove the 2 screws
and remove the fan
motor fixing frame.
3. Remove the right side
panel.
1Release the outdoor
temperature thermistor.
2Lift up the guard net
and remove it.
Step Procedure Points
Fan motor fixing frame (R17519)
(R7208)
Outdoor temperature thermistor
Guard net
(R7209)

Outer Panels / Fan Motor Si001266EA
6Removal Procedure
3Remove the 7 screws
of the right side panel.
4Unfasten the upper
hook.
When reassembling, make
sure to fit the hook.
5Lift up the right side
panel and remove it.
When reassembling, make
sure to fit the hook.
Step Procedure Points
Right side panel
(R17752)
(R3256)
Hook
(R3257)

Si001266EA Electrical Box
Removal Procedure 7
2. 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.
[S30]: compressor
2Disconnect the
connector [S30].
3Disconnect the
connector [S40].
[S40]: overload protector
[S20]: electronic expansion
valve coil
4Disconnect the
connector [S20].
5Disconnect the
connector [S80].
[S80]: four way valve coil
When reassembling,
connect the connectors in
the following order.
(1) [S80]
(2) [S20]
(3) [S40]
(4) [S30]
(5) reactor
(R17221)
[S30]
Reactor
(R17222)
[S40][S20]
(R7219)
[S80]

Electrical Box Si001266EA
8Removal Procedure
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

Si001266EA PCB
Removal Procedure 9
3. 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 PCB
when you disconnect the
lead wires on the terminal
board without removing the
electrical box.
2Remove the 4 screws.
3Unfasten the 3 hooks
on the upper side.
4Lift and pull out the
PCB.
(R19274)
Screw
Earth /
ground
wire
Earth / ground
wire
(R16485)
Hook

Reactor / Partition Plate Si001266EA
10 Removal Procedure
4. 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.
3Lift the partition plate
and remove it.
When reassembling, fit the 2
lower hooks into the bottom
frame.
Reactor
(R11879)
Partition plate
(R12273)
Hook (R13508)

Si001266EA Sound Blankets
Removal Procedure 11
5. 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).
Since the piping ports are
torn easily, remove the
sound blanket carefully.
2Remove the sound
blanket (top).
3Open and pull the
sound blanket (inner)
out.
4Pull out the sound
blanket (bottom).
(R7229)
Sound blanket (outer)
(R7231)
Sound blanket
(top)
(R7232)
Sound blanket (inner)
Sound blanket
(bottom)
(R11888)

Four Way Valve Si001266EA
12 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
1Pull out the electronic
expansion valve coil.
Electronic
expansion
valve coil
(R7233)

Si001266EA Four Way Valve
Removal Procedure 13
2Remove the terminal
cover.
3Disconnect the lead
wires of the
compressor.
4Remove the screw and
remove the four way
valve coil.
5Remove the sheets of
putty.
Step Procedure Points
Terminal cover
(R7234)
V
W
U
Red (U)
Yellow (V) Blue (W)
(R7235)
Four way valve coil
(R7247)
(R7248)

Four Way Valve Si001266EA
14 Removal Procedure
6Heat up the brazed
parts and withdraw the
piping with pliers.
Step Procedure Points
Four way valve
(R7249)
(R7250)

Si001266EA Compressor
Removal Procedure 15
7. 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 nut of the
compressor.
2Heat up the brazed part
of the discharge side
and disconnect.
3Heat up the brazed part
of the suction side and
disconnect.
4Lift the compressor up
and remove it.
Compressor
(R19336)
(R17227)
Discharge side

Revision History
Month / Year Version Revised contents
09 / 2012 Si001266 First edition
08 / 2013 Si001266EA Model addition: RXD25/35HVMV

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/global_ac/
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 August 2013 but subject to change without notice.
Si001266EA
08/2013 AK.B