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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

https://www.daikin.com/products/ac/

All rights reserved

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Warning

Daikin products are manufactured for export to numerous countries throughout the world. Prior to 
purchase, please confirm with your local authorized 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.

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.

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 unauthorized parts and accessories or 
improper installation of parts and accessories can result in water or refrigerant leakage, electrical 
shock, fire or explosion.

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 inquiries, 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.

Specifications, designs and other content appearing in this brochure are current as of August 2019 but subject to change without notice.

Si001555EC

08/2019 AK.B

Summary of Contents for RK18NMVJU

Page 1: ...REMOVAL PROCEDURE S E R V I C E M A N U A L Outdoor Unit Inverter Pair Type 15000 18000 24000 Btu h Class Si001555EC...

Page 2: ...Manual Removal Procedure Outdoor Unit Cooling Only Heat Pump RK18NMVJU RX18NMVJU RK24NMVJU RX24NMVJU RKN24NMVJU RX15QMVJU RX18QMVJU RX15RMVJU RX18RMVJU RX18RMVJU9 RX24RMVJU RXN18NMVJU RXN24NMVJU RXL1...

Page 3: ...tor 4 3 Electrical Box 7 4 PCB 11 5 Thermistor ASSY Partition Plate 14 6 Sound Blankets 17 7 Electronic Expansion Valve Four Way Valve 19 8 Compressor 22 Note The illustrations may be slightly differe...

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: ...4 5 Unfasten 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...

Page 6: ...or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the drip proof cover 2 Remove the 2 screws of the terminal cover 3 4 Open the terminal cover and p...

Page 7: ...side of the electrical box 7 Release the fan motor lead wire from the groove and unfasten the 2 hooks When reassembling fit the fan motor lead wire into the slit at the back of the fan motor fixing fr...

Page 8: ...rame When reassembling fit the 2 lower hooks into the bottom frame 10 Unfasten the 3 hooks on the fan motor fixing frame and release the fan motor lead wire 11 Remove the 4 screws and remove the fan m...

Page 9: ...disconnect the connecting wire and power supply wire Loosen the 2 nuts of the conduits and remove the connecting wire and power supply wire 3 Remove the 2 screws and remove the conduit mounting plate...

Page 10: ...d wires into the appropriate holes 1 S90 Hole No 15 14 13 7 3 2 S40 Hole No 16 2 3 S20 Hole No 11 4 S80 Hole No 1 6 Disconnect the connector S20 and pull out the clamp Hole No 11 S20 electronic expans...

Page 11: ...ll out the clamp from the Hole No 14 and release the outdoor temperature thermistor harness from the slit 12 Remove the outdoor temperature thermistor The design of the outdoor temperature thermistor...

Page 12: ...ical Box Si001555EC 10 Removal Procedure 13 Disconnect the relay connector for compressor 14 Remove the screw and remove the electrical box Step Procedure Points Relay connector R21971 Electrical box...

Page 13: ...or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the screw of the terminal board 2 Remove the earth ground screw 3 Pull out the clamp 1 and cut th...

Page 14: ...1 Hole No 5 pull out the clamp 2 Hole No 12 and release the relay harness from the hook 6 Remove the 3 screws of the mounting plate for terminal board Step Procedure Points Earth ground screw R21976...

Page 15: ...i001555EC PCB Removal Procedure 13 7 Remove the 7 screws of the PCB 8 Unfasten the key hook and then the other 5 hooks 9 Remove the PCB Step Procedure Points PCB R20935 Hook Key hook R21997 PCB R20937...

Page 16: ...ff all power supplies before disassembling work Step Procedure Points 1 Remove the right side panel 1 Remove the screw of the stop valve cover 2 Slide the stop valve cover downward and remove it When...

Page 17: ...e the clip for the thermistor 1 Cut the clamp and pull out the outdoor heat exchanger thermistor 2 Open the sound blanket top and detach the discharge pipe thermistor Be careful not to lose the fixtur...

Page 18: ...rmistor ASSY 3 Remove the partition plate 1 Pull out the clamp 2 Remove the 2 screws and remove the partition plate When reassembling fit the lower hook into the bottom frame Step Procedure Points The...

Page 19: ...f all power supplies before disassembling work Step Procedure Points 1 Remove the sound blanket back Since the piping ports are torn easily remove the sound blanket carefully 2 Remove the sound blanke...

Page 20: ...ets Si001555EC 18 Removal Procedure 4 Remove the sound blanket inner When reassembling fit the sound blankets in the following order 1 inner 2 outer 3 back 4 top Step Procedure Points Sound blanket in...

Page 21: ...askets 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 refri...

Page 22: ...coil The cooling only models have no four way valve coil 3 Remove the terminal cover 4 5 Remove the protection bushing Disconnect the compressor lead wires and the overload protector Step Procedure P...

Page 23: ...arts and remove the electronic expansion valve Heat up the 4 brazed parts and remove the four way valve When reassembling make sure that the four way valve is not inclined The cooling only models have...

Page 24: ...estore 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 u...

Page 25: ...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 Step Procedure Point...

Page 26: ...ersion Revised contents 06 2015 Si001555E First edition 01 2016 Si001555EA Model addition RXL15QMVJU 08 2018 Si001555EB Model addition RX15QMVJU RX18QMVJU RX15RMVJU RX18RMVJU RX24RMVJU 08 2019 Si00155...

Page 27: ...sories supplied or specified by Daikin Ask a qualified installer or contractor to install those parts and accessories Use of unauthorized parts and accessories or improper installation of parts and ac...

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