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Daikin 5MKS90E7V3B, Service Manual

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Daikin 5MKS90E7V3B Service Manual Download Page 26

Removal of PCBs

Si12-794

24

Removal Procedure

3. Remove the service 

monitor PCB.

1

Disconnect the 
connectors [S52] 
[S102] from the service 
monitor PCB.

2

Slightly lift the top hook 
to detach.

3

Unfasten the bottom 
hook and remove the 
service monitor PCB.

Step

Procedure

Points

(R10410)

[S102]

[S52]

Service 
monitor PCB

(R6436)

(R6437)

Summary of Contents for 5MKS90E7V3B

Page 1: ...REMOVAL PROCEDURE S E R V I C E M A N U A L Outdoor Unit Inverter Multi Type 8 0 9 0 10 0 kW Class Si12 794...

Page 2: ...Service Manual Removal Procedure Outdoor Unit zCooling Only zHeat Pump 5MKS90E7V3B 4MXS80E7V3B 5MXS90E7V3B 4MKS80ESG 3MXS90EVLT 3MKS90EVLT 4MXS100EVLT 4MKS100EVLT 4MXS80EVMA 4MKS90EVMA...

Page 3: ...lectrical Box 16 3 Removal of PCBs 22 4 Removal of Fan Motor 26 5 Removal of Coils Thermistors 27 6 Removal of Sound Blankets 32 7 Removal of Compressor 35 Note The illustrations may be slightly diffe...

Page 4: ...0 minutes or more after turning off all power supplies before disassembling work Step Procedure Points Appearance features 1 Remove the suction grille The hooks are secured in the clearances of the ou...

Page 5: ...Slide the suction grille downward to unfasten the 3 top hooks 3 Remove the suction grille 2 Remove the top panel 1 Remove the 4 screws on the back and the screw on the left side panel Step Procedure P...

Page 6: ...Procedure 2 Remove the 2 screws on the front and the screw on the right side panel 3 Lift the top panel and remove it 3 Remove the right side panel 1 Remove the 5 screws Step Procedure Points R6374 Ri...

Page 7: ...Si12 794 Removal of Outer Panels Removal Procedure 5 2 Slide the right side panel downward to unfasten the 2 hooks on the back side Step Procedure Points R6377 Hook R14614 Hook R14615...

Page 8: ...val Procedure 3 Remove the right side panel 4 Remove the front panel 2 This screw is M5 16 1 Remove the 2 screws 2 Slide the front panel 2 downward to unfasten the hook Step Procedure Points R10441 R1...

Page 9: ...l 2 5 Remove the front panel 1 Remove the discharge grille and outdoor fan first to remove the front panel 1 1 Remove the 4 screws on the discharge grille 2 Pull the bottom of the discharge grille Ste...

Page 10: ...d to unfasten the 2 hooks at the top 4 Remove the discharge grille 5 Remove the nut and remove the outdoor fan Nut size M8 When reassembling align the mark of the outdoor fan with the D cut section of...

Page 11: ...emoval Procedure 9 6 Remove the 2 screws on the partition plate 1 7 Remove the screw at the bottom left of the front panel 1 8 Remove the screw at the bottom of the left side Step Procedure Points R10...

Page 12: ...9 Remove the screw at the bottom of the back side 10 The front panel 1 has a hook Lift the front panel 1 11 Remove the front panel 1 Be sure to detach the front panel 1 carefully so as not to deform i...

Page 13: ...uter Panels Removal Procedure 11 6 Remove the rear panel 1 Remove the screw on the partition plate 2 2 Slide the partition plate 2 to the left and remove it Step Procedure Points R11209 Rear panel Par...

Page 14: ...Procedure 3 Remove the 5 screws on the wire fixing plate upper 4 Remove the wire fixing plate upper 5 Remove the 3 screws on the wire fixing plate lower Step Procedure Points R11210 Wire fixing plate...

Page 15: ...ng plate lower 7 Pull out the holder of the outdoor temperature thermistor The holder is secured in the clearances of the outdoor heat exchanger fins 8 Release the thermistor wire from the groove Step...

Page 16: ...794 14 Removal Procedure 9 Remove the 3 screws on the rear panel 10 Remove the screw on the bottom frame 11 Remove the screw on the stop valve mounting plate Step Procedure Points R10390 R10391 R1039...

Page 17: ...Si12 794 Removal of Outer Panels Removal Procedure 15 12 Lift the rear panel upward to unfasten the 2 hooks 13 Remove the rear panel Step Procedure Points Hook Hook R12918 R10394...

Page 18: ...10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the 2 screws to detach the earth wires 2 Disconnect the connector for the fan motor S70...

Page 19: ...valve coil S20 white room A S21 red room B S22 blue room C S23 yellow room D Pull out the clamp The 3 room models have no harness for S23 The 5 room models have S24 green for room E When reassembling...

Page 20: ...hermistors S90 Pull out the clamp When reassembling insert the clamp of the thermistor ASSY into the hole as below 9 The wire harness of the thermistor is hooked under the electrical box Unhook it and...

Page 21: ...10 Disconnect the connector for the overload protector S40 11 The wire harness for the compressor is attached to the partition plate 1 by the clamp 12 Pull out the clamp with pliers Step Procedure Poi...

Page 22: ...re 13 Disconnect the relay connector of the compressor 14 Remove the screw on the stop valve mounting plate 15 Remove the screw on the partition plate 1 Step Procedure Points R6469 R10395 Electrical b...

Page 23: ...Electrical Box Removal Procedure 21 16 Slide the electrical box leftward to unfasten the hook on the right side of the electrical box 17 Lift up the electrical box and remove it Step Procedure Points...

Page 24: ...e after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the main PCB 1 Remove the cover of the electrical box Release the 4 hooks The hooks are marked with W 2...

Page 25: ...ssion HR1 HR2 reactor AC1 AC2 terminal board power supply U V W compressor 6 Remove the main PCB 2 Remove the reactor 1 Remove the screw 2 Remove the 3 screws and lift the reactor upward to remove it...

Page 26: ...service monitor PCB 1 Disconnect the connectors S52 S102 from the service monitor PCB 2 Slightly lift the top hook to detach 3 Unfasten the bottom hook and remove the service monitor PCB Step Procedu...

Page 27: ...Si12 794 Removal of PCBs Removal Procedure 25 4 Remove the terminal board 1 Remove the screw 2 Unfasten the hook 3 Remove the terminal board Step Procedure Points R10411 Terminal board R10412 R10413...

Page 28: ...cedure Points 1 2 Remove the 2 lower screws of the fan motor Remove the 2 upper screws Be sure to remove the lower screws first If the upper screws are removed first the fan motor may tilt or fall bec...

Page 29: ...k Step Procedure Points 1 Remove the electronic expansion valve coils 1 Pull out the electronic expansion valve coils 2 Remove the thermistors Place the thermistor so that its edge comes up to the edg...

Page 30: ...y and pull out the liquid pipe thermistors Be careful not to lose the fixtures for the thermistors 3 Pull out the outdoor heat exchanger thermistor Step Procedure Points Liquid pipe thermistor R17413...

Page 31: ...Remove the clip from the outdoor heat exchanger thermistor Be careful not to lose the clip 5 Slightly open the sound blanket outer 6 Remove the sound blanket top upper Step Procedure Points R6452 Cli...

Page 32: ...edure 7 Remove the discharge pipe thermistor 8 Remove the fixture 3 Remove the four way valve coil The cooling only models do not have a four way valve coil 1 Remove the screw Step Procedure Points R1...

Page 33: ...Si12 794 Removal of Coils Thermistors Removal Procedure 31 2 Remove the four way valve coil Step Procedure Points R10432 Four way valve coil...

Page 34: ...fore disassembling work Step Procedure Points 1 Open the sound blanket outer 2 Remove the sound blanket top upper The sound blanket is fragile Carefully pass the blanket through the discharge pipe 3 R...

Page 35: ...hrough the discharge pipe 5 Remove the sound blanket top inner 6 Open the sound blanket inner and pass it through the part of the mufflers The sound blanket is fragile Be careful of the notches of the...

Page 36: ...Removal of Sound Blankets Si12 794 34 Removal Procedure 7 Remove the sound blanket inner Step Procedure Points R10439...

Page 37: ...o wait for 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the terminal cover 2 Disconnect the compressor lead wires U red V yellow W b...

Page 38: ...oil inside the four way valve and the deterioration of the gaskets affected by heat Keep below 120 C For the sake of this wrap the four way valve with wet cloth and provide water so that the cloth do...

Page 39: ...Revision History Month Year Version Revised contents 07 2013 Si12 794 First edition...

Page 40: ...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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