Daikin RKC50NRV16 User manual

REMOVAL
PROCEDURE
SERVICE MANUAL
5.0 kW Class
Outdoor Unit
Inverter
Pair Type
Si001268E

Service Manual
Removal Procedure
Outdoor Unit
zCooling Only
RKC50NRV16

Si001268E
Removal Procedure 1
Table of Contents
1. Outer Panels ...........................................................................................2
2. Outdoor Fan / Fan Motor.........................................................................3
3. Electrical Box ..........................................................................................5
4. PCB.........................................................................................................9
5. Thermistor ASSY ..................................................................................10
6. Reactor / Sound Blanket .......................................................................11
7. Capillary Tube .......................................................................................12
8. Compressor...........................................................................................14
Note: The illustrations may be slightly different depending on the model.

Outer Panels Si001268E
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 Remove the 4 screws
and remove the top
panel.
2 Remove the 7 screws
of the front panel.
3 Unfasten the right side
hooks and remove the
front panel.
The discharge grille has 2
projections to prevent its
rotation. Press the projection
from the rear side and rotate
the discharge grille to
remove it.
4 Remove the screw and
remove the discharge
grille.
(R18428)
Top panel
Front panel
Projection (rear side) (R18429)
Discharge grille
rear side
(R19405)

Si001268E Outdoor Fan / Fan Motor
Removal Procedure 3
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 Disconnect the
connector [S70].
This procedure is not
necessary to remove the
outdoor fan only.
[S70]: fan motor
2 Release the fan
motor lead wire from
the groove of the
partition plate and
the 4 hooks on the
electrical box.
3 Remove the nut and
remove the outdoor fan.
Nut size: M6
When reassembling, align
the mark of the outdoor
fan with the D-cut section of
the motor shaft.
(R18430)
[S70]
Hook
(R19360)
Outdoor fan
(R18431)
10 mm
(0.39 inch)
(R18954)

Outdoor Fan / Fan Motor Si001268E
4Removal Procedure
4 Remove the screw of
the fan motor fixing
frame.
5 Unfasten the 2 hooks
at the bottom and
remove the fan motor
fixing frame.
6 Open the 2 hooks
and release the fan
motor lead wire.
7 Remove the 4 screws
and remove the fan
motor.
Step Procedure Points
(R18432)
Fan motor fixing frame
(R19361)
(R18433)
Hook
(R18434)
Fan motor

Si001268E Electrical Box
Removal Procedure 5
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
1 Disconnect the
connector [S70].
[S70]: fan motor
2 Disconnect the
connector [S40].
[S40]: overload protector
3 Cut the clamp and
disconnect the
connector [S90].
[S90]: thermistors
(R19362)
[S70]
(R18435)
[S40]
(R19363)(R18436)
Clamp
[S90]

Electrical Box Si001268E
6Removal Procedure
4 Disconnect the 2
connectors of the
reactor.
(1) orange
(2) brown
5 Disconnect the relay
connector for the
compressor.
6 Cut the clamp of the
relay connector
harness.
7 Remove the screw and
remove the stop valve
cover.
Step Procedure Points
(R18437)
(1)
(2)
Reactor
(R18438)
(R18439)
Clamp
(R18440)
Stop valve
cover

Si001268E Electrical Box
Removal Procedure 7
8 Remove the 3 screws
and remove the wire
fixture.
9 Remove the 7 screws
and remove the
connecting wire and the
power supply wire.
10 Remove the earth /
ground screw (upper).
Step Procedure Points
(R18441)
Wire fixture
(R18442)
Connecting wire Power supply wire
(R18443)
Earth / ground wire (upper)

Electrical Box Si001268E
8Removal Procedure
11 Remove the 2 screws
on the right side panel.
12 Remove the screw on
the partition plate.
13 Lift and remove the
electrical box.
Step Procedure Points
(R19364)
Right side panel
(R18444)
Partition plate
(R18445)
Electrical box

Si001268E PCB
Removal Procedure 9
4. PCB
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 screw and
remove the electrical
box cover.
2 Remove the 5 screws
of the PCB.
3 Remove the earth /
ground screw (upper).
4 Remove the PCB.
(R18446)
Electrical
box cover
(R18447)
PCB
(R19390)
Earth / ground
wire (upper)
(R18448)

Thermistor ASSY Si001268E
10 Removal Procedure
5. Thermistor ASSY
Warning Be sure to wait for 10 minutes or more after turning off all power supplies before
disassembling work.
Step Procedure Points
1 Pull out the outdoor
temperature thermistor.
2 Remove the 5 screws
of the right side panel.
When reassembling, insert
the 2 lower hooks and the
upper hook of the back.
3 Remove the right side
panel.
4 Release the discharge
pipe temperature
thermistor.
5 Pull out the outdoor
heat exchanger
thermistor and remove
the thermistor ASSY.
Be careful not to lose the
fixture for the thermistor.
(R18449)
Outdoor temperature thermistor
(R18450)
Right side
panel
(R18451)
Discharge pipe temperature thermistor
(R18452)
Outdoor heat exchanger thermistor
(R19407)
Fixture

Si001268E Reactor / Sound Blanket
Removal Procedure 11
6. Reactor / Sound Blanket
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 screw.
2 Remove the reactor. There is a hook at the
bottom of the reactor.
3 Remove the sound
blanket.
Since the piping ports are
torn easily, remove the
sound blanket carefully.
(R18454)
Reactor
(R18455)
(R18457)
Sound blanket

Capillary Tube Si001268E
12 Removal Procedure
7. Capillary Tube
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
1 Remove the 2 screws
and remove the
partition plate.
(R18456)
Partition
plate

Si001268E Capillary Tube
Removal Procedure 13
2 Cut the 2 clamps of the
guard net.
3 Open the guard net.
4 Remove the putty.
5 Heat up the brazed
parts and disconnect
the capillary tube.
Step Procedure Points
(R18458)
Clamp
(R18459)
Guard net
(R18460)
Capillary tube

Compressor Si001268E
14 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
1 Remove the terminal
cover.
2 Remove the protection
bushing.
3 Disconnect the
compressor lead wires
and the overload
protector.
Terminal cover
(R18461)
(R18462)
Protection bushing
(R19365)
V (yellow)
U (red)
W (blue)
Overload
protector

Si001268E Compressor
Removal Procedure 15
4 Heat up the brazed part
of the discharge side
and disconnect.
5 Heat up the brazed part
of the suction side and
disconnect.
6 Remove the 3 nuts of
the compressor.
7 Lift the compressor up
and remove it.
Step Procedure Points
(R18463)
(R18464)

Revision History
Month / Year Version Revised contents
09 / 2013 Si001268E First edition

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 September 2013 but subject to change without notice.
Si001268E
09/2013 AK.B