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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/products/ac/

All rights reserved

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Warning

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Daikin 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.

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Ask 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.

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Use 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.

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Read 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

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Specifications, designs and other content appearing in this brochure are current as of July 2015 but subject to change without notice.

Si001556E

07/2015 AK.B

Summary of Contents for RKN18NMVJU

Page 1: ...REMOVAL PROCEDURE S E R V I C E M A N U A L 18000 Btu h Class Outdoor Unit Inverter Pair Type Si001556E...

Page 2: ...Service Manual Removal Procedure Outdoor Unit zCooling Only RKN18NMVJU...

Page 3: ...moval Procedure 1 Table of Contents 1 Outer Panels 2 2 Outdoor Fan Fan Motor 4 3 Electrical Box 7 4 PCB 10 5 Thermistor ASSY Partition Plate 12 6 Sound Blankets 16 7 Electronic Expansion Valve Coil Co...

Page 4: ...turning off all power supplies before disassembling work Step Procedure Points 1 Remove the 6 screws and remove the top panel 2 Remove the 8 screws of the front panel 3 Slide the fan motor fixing fra...

Page 5: ...n the 2 hooks on the right side Remove the front panel 6 Remove the 4 screws of the discharge grille 7 Unfasten the 2 hooks and remove the discharge grille Step Procedure Points Hook Front panel R2187...

Page 6: ...rning off all power supplies before disassembling work Step Procedure Points 1 Remove the drip proof cover 2 3 Disconnect the connector S71 Pull out the bottom clamp of the fan motor lead wire S71 fan...

Page 7: ...embling 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 6 Remove the 2 screws and remove the fan motor fixing frame When...

Page 8: ...6E 6 Removal Procedure 7 Unfasten the 3 hooks on the fan motor fixing frame and release the fan motor lead wire 8 Remove the 4 screws and remove the fan motor Step Procedure Points Fan motor lead wire...

Page 9: ...terminal cover 2 3 Open the terminal cover and pull down to unfasten the 2 hooks Remove the terminal cover 4 5 6 Remove the 7 screws on the terminal board and disconnect the connecting wire and power...

Page 10: ...te to the right side panel 8 Remove the 2 screws 9 Disconnect the connector S20 S20 electronic expansion valve coil 10 Disconnect the 2 connectors from the reactor When reassembling you can reconnect...

Page 11: ...40 overload protector 12 Disconnect the connector S30 S30 compressor motor 13 Disconnect the connector S90 and pull out the clamp S90 thermistors 14 Remove the screw and remove the electrical box Step...

Page 12: ...work Step Procedure Points 1 Remove the screw of the terminal board 2 Remove the earth ground screw and pull out the clamp from the mounting plate for terminal board 3 Remove the earth ground screw fr...

Page 13: ...ocedure 11 4 5 Remove the 3 screws of the PCB Unfasten the 2 spacers and the 2 hooks to remove the PCB A long screwdriver is necessary for removing these screws Step Procedure Points Spacer Spacer Hoo...

Page 14: ...upplies before disassembling work Step Procedure Points 1 Remove the screw of the stop valve cover 2 Slide the stop valve cover downward and remove it When reassembling make sure to fit the 3 hooks 3...

Page 15: ...the right side panel When reassembling make sure to fit all the hooks 6 Pull out the outdoor heat exchanger thermistor and cut the clamp Be careful not to lose the clip for the thermistor Step Procedu...

Page 16: ...t to lose the fixture for the thermistor 8 Remove the thermistor ASSY 9 Pull out the clamp 10 11 12 Remove the 2 screws of the reactor Slide the reactor upward to unfasten the 2 hooks Remove the react...

Page 17: ...SY Partition Plate Removal Procedure 15 13 Remove the 2 screws and remove the partition plate When reassembling fit the lower hook into the bottom frame Step Procedure Points Partition plate R21910 Ho...

Page 18: ...er supplies before disassembling work Step Procedure Points 1 Remove the sound blanket top Since the piping ports on the sound blanket are torn easily remove the blanket carefully 2 Open and pull up t...

Page 19: ...llect 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 heat...

Page 20: ...r 5 6 7 8 Heat up the brazed part of the discharge side pipe and disconnect it Heat up the brazed part of the suction side pipe and disconnect it Remove the 3 nuts Lift up the compressor and remove it...

Page 21: ...Revision History Month Year Version Revised contents 07 2015 Si001556E First edition...

Page 22: ...ories 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 acc...

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