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Daikin 2MXM56PVLT, Service Manual

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Daikin 2MXM56PVLT Service Manual Download Page 14

PCBs

Si121561E

12

Removal Procedure

4

Cut the clamp.

5

Unfasten the 4 
projections and remove 
the service monitor 
PCB.

2. Remove the terminal 

board mounting plate.

1

Remove the earth / 
ground screw.

Step

Procedure

Points

Clamp

(R22478)

Projection

Projection

Service 
monitor PCB

(R22479)

Earth / ground 
screw

(R22480)

Summary of Contents for 2MXM56PVLT

Page 1: ...REMOVAL PROCEDURE S E R V I C E M A N U A L 5 6 6 2 6 5 7 5 8 0 9 0 kW Class 24000 28000 Btu h Class Outdoor Unit Inverter Hybrid Multi Type Si121561E ...

Page 2: ...Service Manual Removal Procedure Outdoor Unit zCooling Only zHeat Pump MKM24PV2S 2MXM56PVLT MKM28PV2S 2MXM75PVLT MKM65PV14 3MXM90PVLT MKM80PV14 MKM65PV1G MKM80PV1G MV62PV1G ...

Page 3: ...late ASSY Electrical Box 6 4 PCBs 11 5 Partition Plate Sound Blankets 15 6 Electronic Expansion Valve Coil ASSY Thermistor ASSYs 18 7 Four Way Valve 21 8 Compressor 23 Note The illustrations may be slightly different depending on the model The illustrations are for heat pump models as representative ...

Page 4: ...remove the top panel 2 Remove the 5 screws of the right side panel The right side panel can be removed without removing the top panel 3 4 Slide the right side panel downward to unfasten the 2 hooks on the left of the right side panel Unfasten the 2 hooks at the back and remove the right side panel When reassembling make sure that the 4 hooks are securely fastened Top panel R22446 Right side panel ...

Page 5: ...ooks on the left side Remove the front panel When reassembling make sure that the 3 hooks are securely fastened 8 Remove the 4 screws of the discharge grille 9 Unfasten the 5 hooks and remove the discharge grille Step Procedure Points Front panel R22449 Hook R22450 Discharge grille R22451 Hook Hook R22452 ...

Page 6: ...Step Procedure Points 1 Remove the drip proof cover 2 Disconnect the connector S70 S70 fan motor 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 3 Release the fan motor lead wire from the slit and the groove Drip proof cover R22453 S70 R22454 Lead wire Outdoor fan R3249 Slit Groove Fan motor lead wire R22455 ...

Page 7: ...he 2 screws and remove the fan motor fixing frame When reassembling fit the 2 lower hooks into the bottom frame 6 Unfasten the 3 hooks on the fan motor fixing frame and release the fan motor lead wire 7 Remove the 4 screws and remove the fan motor Step Procedure Points D cut Nut Outdoor fan R22456 13 mm 0 51 inch R18965 Fan motor fixing frame R22457 Hook R22212 Hook Fan motor lead wire R22458 Fan ...

Page 8: ...her with the 3 connecting wires Room A B C and power supply wire 3 4 Remove the 2 screws Tilt the partition plate 2 upward and pull forward to unfasten the 2 hooks and remove it When reassembling make sure that the 2 hooks are securely fastened 5 6 Release the outdoor temperature thermistor from the slit Remove the 5 screws of the rear plate ASSY Terminal board Power supply wire Wire fixture Conne...

Page 9: ... to lose the clip for the thermistor When reassembling insert the thermistor harness through the heat exchanger pipes 1 Cut the clamp and pull out the outdoor heat exchanger thermistor 2 Disconnect the connector S80 and pull out the clamp S80 four way valve Cooling only models have no harness for S80 Step Procedure Points Hook Rear plate ASSY R22464 Clamp Outdoor heat exchanger thermistor R22465 C...

Page 10: ...ed room B S22 blue room C S92 gas pipe thermistor The 2 room models do not have S22 The 4 room models have S23 yellow for room D 4 Disconnect the connector S93 S93 liquid pipe thermistor 5 Disconnect the connector S40 S40 overload protector When reassembling connect the connectors in the reverse order Step Procedure Points S20 S21 S22 S92 R22467 S93 R22468 S40 R22469 ...

Page 11: ...or compressor 7 Pull out the 2 clamps 8 Open the sound blanket top outer and detach the discharge pipe thermistor Be careful not to lose the fixture for the thermistor Step Procedure Points Relay connector R22470 Clamp R22471 Discharge pipe thermistor Sound blanket top outer R22472 Fixture R22559 ...

Page 12: ...Rear Plate ASSY Electrical Box Si121561E 10 Removal Procedure 9 Remove the 2 screws 10 Remove the electrical box Step Procedure Points R22473 Electrical box R22474 ...

Page 13: ... the service monitor PCB 1 Remove the screw of the service monitor PCB cover 2 Unfasten the 3 hooks and remove the service monitor PCB cover When reassembling make sure that the 3 hooks are securely fastened 3 Disconnect the 2 connectors S501 and S502 from the service monitor PCB S501 S502 to main PCB Service monitor PCB cover R22475 Hook R22476 Service monitor PCB S501 S502 R22477 ...

Page 14: ...mp 5 Unfasten the 4 projections and remove the service monitor PCB 2 Remove the terminal board mounting plate 1 Remove the earth ground screw Step Procedure Points Clamp R22478 Projection Projection Service monitor PCB R22479 Earth ground screw R22480 ...

Page 15: ...ct the connector S90 and the 3 terminals for power supply S90 thermistors HL1 HN1 S to terminal board 4 Remove the 4 screws of the terminal board mounting plate Step Procedure Points Bottom view Clamp Clamp R22481 S90 S HL1 HN1 R22482 Terminal board mounting plate R22483 ...

Page 16: ...p to unfasten the hook and remove it When reassembling make sure to fasten the hook with the notch 3 Remove the main PCB 1 2 Remove the 9 screws Unfasten the 3 hooks and remove the main PCB Step Procedure Points Hook Terminal board mounting plate R22484 Hook R22485 Main PCB R22486 ...

Page 17: ...e the partition plate When reassembling fit the lower hook into the bottom frame 1 2 Remove the 2 screws Lift up the partition plate and remove it 2 Remove the sound blankets 1 Remove the sound blanket top outer 2 Release the 2 Velcro tapes front and the Velcro tape right on sound blanket outer Partition plate R22487 Hook R22488 Sound blanket top outer R22489 Front Right Sound blanket outer Velcro...

Page 18: ...blanket top inner 1 When reassembling put the sound blanket top inner 1 and sound blanket top inner 2 as the position below 5 Remove the sound blanket top inner 2 Some models do not have the sound blanket top inner 2 Step Procedure Points Sound blanket outer R22491 Sound blanket top inner 1 R22492 Sound blanket top inner 1 Sound blanket top inner 2 R22493 Sound blanket top inner 2 R22494 ...

Page 19: ...Sound Blankets Removal Procedure 17 6 Remove the sound blanket inner 7 Remove the sound blanket bottom Some models do not have the sound blanket bottom Step Procedure Points Sound blanket inner R22495 Sound blanket bottom R22496 ...

Page 20: ...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 d...

Page 21: ... of the electronic expansion valve coils varies depending on the models 2 Remove the liquid pipe thermistor ASSY 1 Remove the sheets of putty 2 3 Pull out the liquid pipe thermistors Remove the liquid pipe thermistor ASSY Be careful not to lose the fixture for the thermistor Step Procedure Points Electronic expansion valve coil R22498 Putty R22499 Liquid pipe thermistor R22500 Fixture R22337 ...

Page 22: ...tor ASSY The number of the gas pipe thermistorsvaries depending on the models Be careful not to lose the clip of the thermistor 1 2 Cut the heat resistant clamp and pull out the gas pipe thermistors Remove the gas pipe thermistor ASSY Step Procedure Points Gas pipe thermistor Heat resistant clamp R22501 Clip R22332 ...

Page 23: ... way valve with wet cloth and provide water so that the cloth does not dry 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 ...

Page 24: ... bushing Disconnect the compressor lead wires and the overload protector 5 6 Remove the putty Heat up the 4 brazed parts and remove the four way valve Step Procedure Points Terminal cover R22503 U red V yellow W blue Protection bushing Overload protector R22504 Four way valve Putty Brazed part R22505 ...

Page 25: ... 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 ...

Page 26: ...e and disconnect it Heat up the brazed part of the suction side pipe and disconnect it Heat up the brazed part of the accumulator and disconnect it Remove the 2 nuts Lift up the compressor and remove it Step Procedure Points U red V yellow W blue Protection bushing Overload protector R22504 Putty Nut Putty Compressor Brazed part of the discharge side pipe Brazed part of the accumulator Brazed part...

Page 27: ...Revision History Month Year Version Revised contents 10 2015 Si121561E First edition ...

Page 28: ...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 accessories can result in water or refrigerant leakage electrical shock fire or explosion z Read the user s manual carefully before using this product The user s manual provides important safety instruct...

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