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Daikin FTXR28EV1B9, Service Manual, Page: 27 / 52

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Daikin FTXR28EV1B9 Service Manual Download Page 27

Si04-756

Removal of PCBs

Removal Procedure

25

2. Remove the terminal 

board.

1

Remove the screw and 
pull out the terminal 
board.

2

Disconnect the 
terminals with pliers.

Black...... (1) power supply
White ..... (2) power supply
Red ........ (3) signal
Green..... earth

3. Remove the control PCB.

„

When reassembling, fix the 
harnesses with clamps.

1

Cut the 3 clamps.

2

Release the earth wire 
from the hook.

Step

Procedure

Points

(R14161)

Terminal 
board

(R14162)

(R14163)

Control PCB

Clamp

(R5704)

Summary of Contents for FTXR28EV1B9

Page 1: ...REMOVAL PROCEDURE S E R V I C E M A N U A L Indoor Unit Inverter Wall Mounted Type 2 8 4 2 5 0 kW Class Si04 756...

Page 2: ...Service Manual Removal Procedure Indoor Unit zHeat Pump FTXR28EV1B9 FTXR42EV1B9 FTXR50EV1B9 FTXR28FVLT FTXR50FVLT...

Page 3: ...16 6 Removal of Electrical Box 19 7 Removal of PCBs 24 8 Removal of Dehumidifying Solenoid Valve Coils 30 9 Removal of Connecting Duct 31 10 Removal of Drain Hose 33 11 Removal of Swing Motors 35 12...

Page 4: ...Step Procedure Points 1 External appearance Multi colored indicator lamp changes its color according to the operation mode Remote controller is interactive communication type 2 Remove the air filters...

Page 5: ...plate 3 Push the center part of the air filter up to unfasten the 2 hooks 4 Remove the air filter 5 The shapes of the right and left filters are different Insert the filters along the guide for easy i...

Page 6: ...er 1 Pull the center knob to unfasten the hook 2 Pull out the deodorizing filter for streamer 3 Unfasten the 3 hooks When cleaning keep the filter with the frame for prevention of breakage 4 Slide the...

Page 7: ...ing filter 1 Unfasten the projection of the frame of Titanium apatite photocatalytic air purifying filter and remove it Insert the filter along the guide for easy installation 2 Unfasten the 4 hooks a...

Page 8: ...ing operation without installing the air supply filter may form condensation inside the front panel and it causes water leakage There are 4 hooks for the air supply filter 1 Lift the air supply filter...

Page 9: ...sides to detach the rotary shafts from the holes 3 Slide the rotary shaft on the left to the right and pull it out 4 Slide the rotary shaft on the right to the left and pull it out 5 Remove the front...

Page 10: ...supplies before disassembling work Step Procedure Points 1 Remove the service cover 1 Remove the screw black of the service cover 2 Slide the service cover downward to unfasten the hook on the back s...

Page 11: ...9 2 Remove the upper panel 1 The upper panel has 3 hooks at the front 2 In part A pinch and unfasten the hook 3 In part B pinch and unfasten the hook as in part A Step Procedure Points R13951 Upper pa...

Page 12: ...ft the right and left sides to bend the upper panel and slightly pull it to unfasten the hook 5 Pull the upper panel and remove it When reassembling make sure to catch the 3 hooks on the far side Step...

Page 13: ...p Procedure Points 1 Remove the front grille If the hooks are hard to be unfasten use a flat screwdriver The convex marks on the front panel indicate the position of the hooks 1 Remove the 3 screws 2...

Page 14: ...sembling make sure that the horizontal blade large does not come inside When reassembling follow the same steps for removal in reverse 1 When reassembling the front grille fit the 4 lower hooks and pu...

Page 15: ...cedure 13 3 The front panel mechanism assembly is fixed to the front grille Check that the arm is in the stored position 4 Installation structure 5 Movement of the arm Step Procedure Points R13954 Fro...

Page 16: ...move the front panel mechanism assembly right Preparation Remove the front grille according to Removal of Front Grille 1 Remove the 2 screws 2 Unfasten the hook while straightening the front panel mec...

Page 17: ...el mechanism assembly left 1 Pull out the shaft from the front panel mechanism assembly left 2 Remove the 2 screws 3 Remove the front panel mechanism assembly left Replace the front panel mechanism as...

Page 18: ...y The figure above shows the hook on the connector for the reduction motor assembly When touching the electrical parts like the limit switch be sure to conduct the work after discharging static electr...

Page 19: ...sembly Removal Procedure 17 2 Cut the clamp 3 Slide the cover to the right to unfasten the hook 4 Lift the cover of the reduction motor up slightly to unfasten the upper hook and remove it Step Proced...

Page 20: ...move Remove the screw of the reduction motor 6 Turn the reduction motor assembly over and peel off the tape 7 Remove the reduction motor The connector of the reduction motor can be disconnected 8 Unfa...

Page 21: ...figure shows the arrangement of wiring and names of parts 3 Remove the screw and remove the wire fixing plate 4 Remove the screws and disconnect the connection wires R13960 Electrical box cover Relay...

Page 22: ...difying solenoid valve coils S43 6 Disconnect the connector for the streamer unit PCB S52 7 Disconnect the connector for the swing motors S41 The connector S41 is for both horizontal blades and vertic...

Page 23: ...Si04 756 Removal of Electrical Box Removal Procedure 21 8 Disconnect the connector for the fan motor S1 and release the lead wire from the hook Step Procedure Points S1 R14157 R5688 Hook...

Page 24: ...the 2 screws of the earth wires 11 Pull out the indoor heat exchanger thermistor Be careful not to lose the clip for the thermistor 2 Remove the electrical box 1 Remove the screw of the electrical box...

Page 25: ...ok in the key hole 3 Push up the bottom side of the electrical box or push the bottom frame to the back 4 Unfasten the upper hook 5 The figure shows the shapes of the hook on the back side When reasse...

Page 26: ...Procedure Points 1 Remove the shield plate Preparation Remove the electrical box according to Removal of Electrical Box 1 External appearance of the electrical box 2 Unfasten the hook of the shield pl...

Page 27: ...rd 2 Disconnect the terminals with pliers Black 1 power supply White 2 power supply Red 3 signal Green earth 3 Remove the control PCB When reassembling fix the harnesses with clamps 1 Cut the 3 clamps...

Page 28: ...PCB S48 humidity sensor PCB 4 Pull out the relay connector for the reduction motor while pinching the connector from the back side of the electrical box cover 5 Remove the 2 screws and remove the con...

Page 29: ...limit switch S41 swing motors S52 streamer unit PCB 4 Remove the humidity sensor PCB 1 Unfasten the hook and pull out the humidity sensor PCB 5 Remove the display PCB and the signal receiver transmitt...

Page 30: ...ector S56 S56 control PCB 3 Unfasten the upper hook with a flat screwdriver 4 Unfasten the lower hook 5 Remove the lamp cover assembly Step Procedure Points S56 R13965 Lower hook R5713 Upper hook Rece...

Page 31: ...9 6 Unfasten the 3 hooks and remove the display PCB and the signal receiver transmitter PCB The display PCB and the signal receiver transmitter PCB are united Step Procedure Points R5715 Hooks R13967...

Page 32: ...pplies before disassembling work Step Procedure Points Preparation Remove the front grille according to Removal of Front Grille 1 Disconnect the connector for the dehumidifying solenoid valve coils S4...

Page 33: ...edure Points 1 Detach the humidifying hose from the duct unit Preparation Remove the front grille according to Removal of Front Grille Since inside of the humidifying hose has ridges move the hose up...

Page 34: ...Connecting Duct Si04 756 32 Removal Procedure 4 Pull out the duct unit and remove it 5 When reassembling make sure to insert the projection into the fixing hole Step Procedure Points R5724 Hook R5725...

Page 35: ...drain will not wet the floor Part A is fixed by a screw from the back side When replacing the drain hose make sure to tighten the screw as there is no gap between the heat insulator and the drain hose...

Page 36: ...and tighten the screw Make sure that the drain hose is inserted firmly 3 Insert the detached drain plug with a hexagonal wrench 4 mm Caution Do not push the drain plug with a sharp device like a scre...

Page 37: ...wing motor for the lower blade small Caution When reassembling do not confuse the installing order of the 2 motors and the colors of the connectors If you set the connectors or motors opposite the hor...

Page 38: ...tor assembly with a flat screwdriver 4 Unfasten the hook of the connecting shaft for vertical blades 5 Remove the swing motor assembly 6 Remove the 2 screws and remove the swing motor for vertical bla...

Page 39: ...erant pipe If the refrigerant pipe is disconnected with the compressor operating and the stop valve open air may be sucked in to generate an over pressure inrefrigeration cycle thus resulting in pipe...

Page 40: ...nit 1 Remove the indoor unit from the installation plate 3 Remove the indoor heat exchanger 1 Unfasten the hook of the piping fixture at the back of the indoor unit and pull out the pipe 2 Slightly wi...

Page 41: ...ger be sure to wear protective gloves or wrap the indoor heat exchanger with cloths You may be injured by the fins 5 Unfasten the hook through the gap of the pipings 6 Slide the indoor heat exchanger...

Page 42: ...ure Points 1 Remove the right side panel Preparation Remove the indoor heat exchanger according to Removal of Indoor Heat Exchanger 1 Remove the 2 screws of the right side panel 2 Unfasten the far sid...

Page 43: ...r fixture lower can be removed by removing the screw and pushing the hook 3 Remove the fan motor 1 Loosen the fixing screw 2 Remove the fan motor from the fan rotor 4 Remove the bearing 1 Remove the f...

Page 44: ...Si04 756 42 Removal Procedure 3 The bearing is made of rubber Push it inward firmly and remove it 5 How to install the fan motor 1 When reassembling align the mark on the shaft Step Procedure Points...

Page 45: ...orizontal blades 1 Open the horizontal blade large 2 Unfasten the center shaft for the horizontal blade large When installing the horizontal blades be careful not to put the large and small blades in...

Page 46: ...Unfasten the hook of the interlocking shaft 2 Remove the interlocking shaft 3 Remove the vertical blades 1 Unfasten the 3 hooks of the vertical blades with a flat screwdriver 2 Remove the vertical bla...

Page 47: ...1 Open the electrical box cover and disconnect the connector for the streamer unit PCB S52 Remove the screw of the streamer unit 2 Release the wire harness for the dehumidifying solenoid valve coils f...

Page 48: ...lamp and remove the screw of the drip proof cover 2 Remove the cover of the streamer unit 1 Remove the 2 screws of the cover 2 Turn the streamer unit back and unfasten the 7 hooks 3 Remove the cover o...

Page 49: ...unit 1 Remove the deodorizing filter for streamer and the electrode unit 2 Slide the cover of the electrode unit to the left and remove it When reassembling slide the cover to the right Step Procedur...

Page 50: ...t PCB 1 Remove the screw of the electrode plate with a precise screwdriver 2 Unfasten the 2 hooks and remove the streamer unit PCB 3 Disconnect the connector and remove the limit switch Step Procedure...

Page 51: ...Revision History Month Year Version Revised contents 07 2013 Si04 756 First edition...

Page 52: ...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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