Daikin 2MXS18GVJU Service Manual
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Daikin 2MXS18GVJU Service Manual

Daikin 2MXS18GVJU Service Manual

Removal procedure, 7.1/8.0 kw class, 18000 btu/h class, outdoor unit, inverter, multi type, heat pump
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REMOVAL
PROCEDURE
S E R V I C E
7.1/8.0 kW Class
18000 Btu/h Class
Outdoor Unit
Inverter
Multi Type
Si12-994
M A N U A L
Table of Contents
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Summary of Contents for Daikin 2MXS18GVJU

  • Page 1 Si12-994 REMOVAL PROCEDURE S E R V I C E M A N U A L 7.1/8.0 kW Class 18000 Btu/h Class Outdoor Unit Inverter Multi Type...
  • Page 2 Service Manual Removal Procedure Outdoor Unit Heat Pump 2MXS18GVJU 3MXS80EV2C PMXS3GV2C...

  • Page 3: Table Of Contents

    Si12-994 Table of Contents 1. Removal of Outer Panels ................2 2. Removal of Electrical Box (Pattern 1) .............3 3. Removal of Electrical Box (Pattern 2) .............7 4. Removal of PCBs (Pattern 1)..............12 5. Removal of PCBs (Pattern 2)..............16 6. Removal of Fan Motor................19 7.

  • Page 4: Removal Of Outer Panels

    Removal of Outer Panels Si12-994 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 External appearance (R2159) Remove the 4 screws of Top panel the top panel and the 6 screws of the front panel.

  • Page 5: Removal Of Electrical Box (Pattern 1)

    Si12-994 Removal of Electrical Box (Pattern 1) 2. Removal of Electrical Box (Pattern 1) 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 connecting wires.
  • Page 6 Removal of Electrical Box (Pattern 1) Si12-994 Step Procedure Points 2. Remove the harnesses. [S20] [S21] [S22] Disconnect the connectors for the electronic expansion valve coils. [S20] [S21] [S22]. (R16025) Remove the connector for the four way valve [S80] coil [S80]. (R11729) Disconnect the [S40]: Overload protector...
  • Page 7 Si12-994 Removal of Electrical Box (Pattern 1) Step Procedure Points Remove the reactor lead wires. Reactor (R2170) 3. Remove the wire fixing plate. Remove the 2 screws of the wire fixing plate. Wire fixing plate (R11309) 4. Remove the electrical box.
  • Page 8 Removal of Electrical Box (Pattern 1) Si12-994 Step Procedure Points Remove the drip proof cover. Drip proof cover (R2174) Disconnect the connector for the fan Inverter PCB motor [S70] from the inverter PCB. [S70] (R2175) Lift up the electrical box and dismount it.

  • Page 9: Removal Of Electrical Box (Pattern 2)

    Si12-994 Removal of Electrical Box (Pattern 2) 3. Removal of Electrical Box (Pattern 2) 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 US model has a connecting wires.
  • Page 10 Removal of Electrical Box (Pattern 2) Si12-994 Step Procedure Points Disconnect the When reassembling, insert [S80] connector for the four the clamp into the hole as way valve coil [S80]. below. Clamp (R17397) (R17398) Disconnect the [S40]: overload protector connectors for the [S90]: thermistors [S90] [S92] [S93] thermistors [S90] [S92]...
  • Page 11 Si12-994 Removal of Electrical Box (Pattern 2) Step Procedure Points Disconnect the relay connector of the compressor. (R17065) Release the clamp with pliers. (R17066) Disconnect the reactor lead wires. Reactor (R2170) Removal Procedure...
  • Page 12 Removal of Electrical Box (Pattern 2) Si12-994 Step Procedure Points 3. Remove the electrical Shield plate box. Remove the screw of the shield plate. (R17345) Unfasten the 2 hooks and remove the shield plate. (R17346) Hook Remove the screw on the right side of the electrical box.
  • Page 13 Si12-994 Removal of Electrical Box (Pattern 2) Step Procedure Points Remove the drip proof cover. Drip proof cover (R2174) Disconnect the connector for the fan Inverter PCB (MID2) motor [S70] from the inverter PCB (MID2). Release the fan motor lead wire from the hooks.

  • Page 14: Removal Of Pcbs (Pattern 1)

    Removal of PCBs (Pattern 1) Si12-994 4. Removal of PCBs (Pattern 1) 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 monitor PCB and the main PCB.
  • Page 15 Si12-994 Removal of PCBs (Pattern 1) Step Procedure Points Remove the drip proof plate. Drip proof plate (R6577) Disconnect the connectors [S52] [S102] from the service monitor PCB. Service monitor PCB [S52] (R6578) [S102] The figure shows the service monitor PCB. Priority room setting switch (SW4) Wiring error check switch...
  • Page 16 Removal of PCBs (Pattern 1) Si12-994 Step Procedure Points Remove the service monitor PCB. (R6580) Lift up the main PCB. Main PCB (R2181) Disconnect the connectors [S31] [S32] [S33] [S71] [H1] [H2]. [S31] [S71] [S33] (R10362) [S32] [H1] (yellow) [H2] (blue) (R10363) Removal Procedure...
  • Page 17 Si12-994 Removal of PCBs (Pattern 1) Step Procedure Points Disconnect the connector [E]. [E] (green/yellow) (R2184) The figure shows the main PCB. [S93] [S92] [S90] [H1] [H2] [S32] [S33] [S71] [S31] [S80] [S22] [S21] [S20] [S40] (R11310) 2. Remove the inverter PCB (MID2).

  • Page 18: Removal Of Pcbs (Pattern 2)

    Removal of PCBs (Pattern 2) Si12-994 5. Removal of PCBs (Pattern 2) 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 When reassembling, insert monitor PCB and the the base bar into the hole of main PCB.
  • Page 19 Si12-994 Removal of PCBs (Pattern 2) Step Procedure Points Lift up the main PCB. (R2181) Disconnect the connectors [S31] [S32] [S33] [S71] [H1] [H2]. [S31] [S71] [S33] (R10362) [S32] [H1] (yellow) [H2] (blue) (R10363) The figure shows the main PCB. [S93] FU2 (3.15A) [S92]...
  • Page 20 Removal of PCBs (Pattern 2) Si12-994 Step Procedure Points Unfasten the 2 hooks and remove the service monitor PCB. Hook Priority room setting switch (SW4) LED A Wiring error check switch LED 1 (SW3) LED 2 Forced operation [ON/OFF] LED 3 switch (SW1) LED 4 NIGHT QUIET mode setting...

  • Page 21: Removal Of Fan Motor

    Si12-994 Removal of Fan Motor 6. Removal of 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 nut and Preparation remove the outdoor fan. Disconnect the connector for the fan motor.

  • Page 22: Removal Of Sound Blankets

    Removal of Sound Blankets Si12-994 7. 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 Remove the 5 screws of the right side panel. Right side panel (R2191)
  • Page 23 Si12-994 Removal of Sound Blankets Step Procedure Points Remove the sound Carefully remove the sound blanket (top upper, top blanket, which is easily inner, outer, inner). torn in the piping section. Sound blanket (top upper) Sound blanket (top inner) Sound blanket (inner) Sound blanket (outer)

  • Page 24: Removal Of Coils / Thermistors

    Removal of Coils / Thermistors Si12-994 8. 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 Remove the screw of the four way valve coil. Four way valve coil (R2194)
  • Page 25 Si12-994 Removal of Coils / Thermistors Step Procedure Points Peel off the putty and Place the thermistor so that pull out the thermistors. its end comes up to the end Gas pipe thermistor of the fixture. Liquid pipe Be careful not to lose the clip thermistor or fixtures for the liquid and gas pipe thermistor.

  • Page 26: Removal Of Four Way Valve / Defrost Solenoid Valve

    Removal of Four Way Valve / Defrost Solenoid Valve Si12-994 9. Removal of Four Way Valve / Defrost Solenoid Valve Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points...
  • Page 27 Si12-994 Removal of Four Way Valve / Defrost Solenoid Valve Step Procedure Points Disconnect the 2 The defrost solenoid valve is brazed points, first (e), only for the U.S. models. and then (f). Remove the defrost Note: Do not use a metal saw for solenoid valve.

  • Page 28: Removal Of Distributor

    Removal of Distributor Si12-994 10.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 Before working, make Warning sure that the refrigerant Be careful not to get yourself gas is empty in the circuit.

  • Page 29: Removal Of Compressor

    Si12-994 Removal of Compressor 11.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 (R16026) Disconnect the Compressor lead wire compressor lead wires.
  • Page 30 Removal of Compressor Si12-994 Step Procedure Points Before working, make sure that the refrigerant is Warning empty in the circuit. Be careful not to get yourself Be sure to apply nitrogen burnt with the pipes and other replacement when parts that are heated by the heating up the brazed gas brazing machine.
  • Page 31 Revision History Month / Year Version Revised contents 02 / 2013 Si12-994 First edition...
  • Page 32 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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