Daikin 3MKS50E3V1B Service Manual
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Daikin 3MKS50E3V1B Service Manual

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Si121174
REMOVAL
PROCEDURE
S E R V I C E
M A N U A L
4.0/5.0/5.2/5.8/6.8/7.5 kW Class
Outdoor Unit
Inverter
Multi Type

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Summary of Contents for Daikin 3MKS50E3V1B

  • Page 1 Si121174 REMOVAL PROCEDURE S E R V I C E M A N U A L 4.0/5.0/5.2/5.8/6.8/7.5 kW Class Outdoor Unit Inverter Multi Type...
  • Page 2 Service Manual Removal Procedure Outdoor Unit Applicable Models Cooling Only Heat Pump 3MKS50E3V1B 3MXS40K2V1B 3MKS58EVMA 3MXS52E3V1B 3MKS58KVM 3MXS52EVMA 4MKS58E3V1B 3MXS52KVM 4MKS75F2V1B 3MXS68G2V1B 4MXS68F2V1B...

  • Page 3: Table Of Contents

    Si121174 Table of Contents 1. Removal of Outer Panels ................2 2. Removal of Electrical Box ...............6 3. Removal of PCBs..................14 4. Removal of Outdoor Fan / Fan Motor ...........19 5. Removal of Sound Blankets..............21 6. Removal of Coils / Thermistors .............25 7.

  • Page 4: Removal Of Outer Panels

    Removal of Outer Panels Si121174 1. Removal of Outer Panels Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step Appearance features Take care not to cut your finger by the fins of the heat exchanger.
  • Page 5 Si121174 Removal of Outer Panels Step Procedure Points Remove the 6 screws Front panel of the front panel. (R17165) Remove the screw of the shield plate. Shield plate (R11204) Slide the shield plate to the left to unfasten the hooks and remove the shield plate.
  • Page 6 Removal of Outer Panels Si121174 Step Procedure Points Lift the front panel up to unfasten the left side hooks. (R5501) The front panel has 3 hooks on the left. Hook (R12901) Unfasten the right side hook and remove the Hook front panel.
  • Page 7 Si121174 Removal of Outer Panels Step Procedure Points Remove the 4 screws of the discharge grille. Discharge grille (R12902) Remove the 2 screws of the stop valve cover. Stop valve cover (R11206) Slide the stop valve cover downward and remove it. (R5506) When reassembling, make sure to fit the 5 hooks.

  • Page 8: Removal Of Electrical Box

    Removal of Electrical Box Si121174 2. Removal of Electrical Box Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step 1. Disconnect the The illustrations are for 3- harnesses.
  • Page 9 Si121174 Removal of Electrical Box Step Procedure Points Detach the fixing tape Fixing of the electrical box tape cover. (R5512) Unfasten the 4 hooks at mark of the electrical box cover. (R5513) Lift the electrical box cover up and remove it. (R5514) Detach the clamp and When reassembling, insert...
  • Page 10 Removal of Electrical Box Si121174 Step Procedure Points Release the fan motor lead wire from the Fan motor lead wire hooks. (R17168) (R5518) Disconnect the [S20] (white) : room A connectors for the [S21] (red) : room B [S20] [S21] [S22] electronic expansion [S22] (blue) : room C...
  • Page 11 Si121174 Removal of Electrical Box Step Procedure Points Disconnect the [S40] connector for the overload protector [S40]. (R5521) 10 The wire harness for the compressor is attached to the partition plate by the clamp. Partition plate Clamp (R12904) 11 Pull out the clamp with pliers.
  • Page 12 Removal of Electrical Box Si121174 Step Procedure Points Disconnect the each [S90] : Thermistors [S90] [S92] [S93] connector. [S92] : Gas pipe thermistors [S93] : Liquid pipe thermistors (R5523) When reassembling, insert each clamp of the thermistor harnesses into the holes as below.
  • Page 13 Si121174 Removal of Electrical Box Step Procedure Points The figure shows the arrangement of the wire harnesses under the electrical box. (R5527) When reassembling, insert Pull out the clamp of the the clamp into the small hole. Thermistor lead wire thermistor lead wire.
  • Page 14 Removal of Electrical Box Si121174 Step Procedure Points (R11180) Remove the 2 screws and remove the wiring fixture. Wiring fixture (R11181) Detach the outdoor temperature thermistor. (R5533) Remove the screw on the right side of the electrical box. (R17258) Removal Procedure...
  • Page 15 Si121174 Removal of Electrical Box Step Procedure Points Remove the screw of the electrical box. (R17259) Lift up and remove the electrical box. (R5536) Removal Procedure...

  • Page 16: Removal Of Pcbs

    Removal of PCBs Si121174 3. Removal of PCBs Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step 1. Remove the service Service monitor PCB Terminal board monitor PCB.
  • Page 17 Si121174 Removal of PCBs Step Procedure Points Unfasten the upper hook and pull the service monitor PCB upward to remove. (R5541) (R5542) 2. Remove the main PCB. [AC1] [AC2] [AC1] [AC2] : for power supply Disconnect the [S10] brown blue [S10] : for transmission connectors for the terminal board on the...
  • Page 18 Removal of PCBs Si121174 Step Procedure Points Unfasten the 3 hooks on the reactor side and slide the main PCB to the left. (R5547) Release the relay harness for the compressor from the hook. (R5548) Lift up the main PCB In working, be careful not to and remove it.
  • Page 19 Si121174 Removal of PCBs Step Procedure Points [S70] [S40] [S20] [S21] [S22] [S23] [S80] [S101] [S10] [S15] [S51] [S90] [S92] [S93] (R6963) Remove the 2 screws of the radiation fin. Clamp for reactor harness (R11207) When reassembling, make sure to use the silicon grease.
  • Page 20 Removal of PCBs Si121174 Step Procedure Points 3. Remove the terminal board. Disconnect all the wire harnesses from the back of the terminal board. Terminal board (back) (R12907) (R5556) Unfasten the hook of the electrical box and remove the terminal board.

  • Page 21: Removal Of Outdoor Fan / Fan Motor

    Si121174 Removal of Outdoor Fan / Fan Motor 4. Removal of Outdoor Fan / Fan Motor Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step Remove the 2 screws Preparation of the fan motor fixing Remove the outer panels...
  • Page 22 Removal of Outdoor Fan / Fan Motor Si121174 Step Procedure Points Open the 2 hooks and When reassembling, put the release the fan motor fan motor lead wire through lead wire. the back of the fan motor so as not to be entangled with the outdoor fan.

  • Page 23: Removal Of Sound Blankets

    Si121174 Removal of Sound Blankets 5. Removal of Sound Blankets Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step 1. Remove the right side Preparation panel. Remove the outer panels Right side panel and plates.
  • Page 24 Removal of Sound Blankets Si121174 Step Procedure Points Lift up and remove the right side panel. (R5573) 2. Remove the partition Partition plate plate. Remove the 2 screws of the partition plate. (R5575) Detach the clamp of the relay harness for the compressor.
  • Page 25 Si121174 Removal of Sound Blankets Step Procedure Points Lift up and remove the partition plate. (R5580) When reassembling, make sure to fit the lower hook of the partition plate. (R5577) 3. Remove the sound Since the piping ports on the blankets.
  • Page 26 Removal of Sound Blankets Si121174 Step Procedure Points Open the sound blanket (outer) and pull it out. Sound blanket (outer) (R5583) Open the sound blanket (inner) and pull it out. Sound blanket (inner) (R5584) Removal Procedure...

  • Page 27: Removal Of Coils / Thermistors

    Si121174 Removal of Coils / Thermistors 6. Removal of Coils / Thermistors Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step 1. Remove the electronic expansion valve coils. Pull out the electronic expansion valve coils.
  • Page 28 Removal of Coils / Thermistors Si121174 Step Procedure Points 3. Remove the thermistors. When reassembling, meet the edge of the thermistor Open the putty and and the fixture. remove the liquid pipe thermistors. Liquid pipe thermistor (R11184) Pull out the gas pipe thermistors.
  • Page 29 Si121174 Removal of Coils / Thermistors Step Procedure Points Remove the discharge When reassembling, meet pipe thermistor. the edge of the thermistor Clip and the fixture. Discharge pipe thermistor (R11185) Remove the assembly of thermistors. Connector Outdoor temperature thermistor Outdoor heat exchanger thermistor Discharge pipe...

  • Page 30: Removal Of Distributor

    Removal of Distributor Si121174 7. Removal of Distributor Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step Remove the putty. Warning Be careful not to get yourself burnt with the pipes and other parts that are heated by the gas brazing machine.

  • Page 31: Removal Of Four Way Valve

    Si121174 Removal of Four Way Valve 8. Removal of Four Way Valve Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step Before working, make The cooling only models sure that the refrigerant have no four way valve coil.

  • Page 32: Removal Of Compressor

    Removal of Compressor Si121174 9. Removal of Compressor Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step Remove the terminal cover. Terminal cover (R12914) Disconnect the compressor lead wires.
  • Page 33 Si121174 Removal of Compressor Step Procedure Points Warning Be careful not to get yourself burnt with the pipes and other parts that are heated by the gas brazing machine. Warning If the refrigerant gas leaks during work, ventilate the room. (If the refrigerant gas is (R5605) exposed to flames, toxic gas Remove the putty.
  • Page 34 Revision History Month / Year Version Revised contents 08/2012 Si121174 First edition...
  • Page 35 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 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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