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Daikin ARXS42G2V1B Service Manual Download Page 22

Removal of Thermistors

Si001070

20

Removal Procedure

6. Removal of Thermistors

Procedure

Warning

Be sure to wait 10 minutes or more after turning off all power supplies 
before disassembling work.

Step

Procedure

Points

1

Release the discharge 
pipe thermistor.

„

Be careful not to lose the clip 
for the thermistor.

2

Cut the clamp and pull 
out the outdoor heat 
exchanger thermistor.

3

The thermistors for 
outdoor temperature / 
discharge pipe / 
outdoor heat exchanger 
are united as one 
assembly.

4

The figure shows the 
arrangement of the 
thermistors.

(R8192)

Discharge pipe thermistor

(R12279)

Clip

(R8193)

Outdoor heat 
exchanger thermistor

(R8194)

Summary of Contents for ARXS42G2V1B

Page 1: ...REMOVAL PROCEDURE S E R V I C E M A N U A L Outdoor Unit Inverter Pair Type 2 5 4 2 4 6 5 0 kW Class Si001070 ...

Page 2: ...Service Manual Removal Procedure Outdoor Unit zCooling Only zHeat Pump RKS42G2V1B RXG50JV2C RXG50KV2C RKS42J2V1B RXL25G2V1B RXL25G3V1B RXS42G2V1B RXS42J2V1B RXS46JV2C ARXS42G2V1B ...

Page 3: ...moval of Outdoor Fan Fan Motor 16 6 Removal of Thermistors 20 7 Removal of Drain Pan Heater ASSY Pattern 1 21 8 Removal of Drain Pan Heater ASSY Pattern 2 23 9 Removal of Four Way Valve Electronic Expansion Valve 26 10 Removal of Compressor 29 Note The illustrations may be slightly different depending on the model The illustrations are for heat pump models as representative ...

Page 4: ...er supplies before disassembling work Step Procedure Points 1 Features Illustrations are slightly different depending on the model Some models do not have guard nets 2 Remove the panels 1 Remove the screw and remove the drain pan heater cover Some models do not have a drain pan heater cover DAIKIN INVERTER R7186 R18392 Guard net R9329 Drain pan heater cover ...

Page 5: ...ve the 4 screws and remove the discharge grille When reassembling make sure to fit the 4 hooks 4 Remove the screw and remove the stop valve cover The stop valve cover is united with the shield plate When reassembling make sure to fit the 5 hooks Step Procedure Points R12305 Top panel Hooks Hooks Discharge grille Front panel R9364 R8139 Stop valve cover R12213 Shield plate ...

Page 6: ...ires When reassembling fasten the wires with screws on the terminal board 1 Remove the 3 screws to remove the wiring fixture Then remove the all screws to disconnect the power supply cables and the connecting wires 2 Remove the electrical box 1 Release the outdoor temperature thermistor 2 Lift up the guard net and remove it R12192 Wiring fixture Power supply cable Connecting wire Terminal board R1...

Page 7: ...7 screws and remove the right side panel 4 Remove the screw of the terminal board 5 Disconnect the connectors of the drain pan heater Some models do not have a drain pan heater 6 Cut the clamp Step Procedure Points R9365 Right side panel R9366 Terminal strip R9367 R9368 ...

Page 8: ...ure of the fan motor lead wire refer to Removal of Outdoor Fan Fan Motor 8 Disconnect the connector for the overload protector S40 9 Disconnect the connector for the electronic expansion valve coil S20 10 Disconnect the connector for the four way valve coil S80 Step Procedure Points R0254 S70 R0255 S40 R0256 S20 R0257 S80 ...

Page 9: ...trical Box Removal Procedure 7 11 Disconnect the connector for the thermistors S90 12 Disconnect the relay connector for the compressor 13 Disconnect the 2 connectors for the reactor Step Procedure Points R0258 S90 R0259 R0260 ...

Page 10: ... Be careful not to lose the clip for the thermistor 15 Detach the clamp for the thermistors from the electrical box 16 Remove the screw in front of the electrical box 17 Lift and remove the electrical box Step Procedure Points R12197 Discharge pipe thermistor R12279 Clip R0262 R12196 R0263 R0264 ...

Page 11: ...dure Points 1 Remove the screw and remove the electrical box cover Preparation Remove the panels according to the Removal of Outer Panels Remove the electrical box according to the Removal of Electrical Box 2 Detach the insulation sheet The trimmed part goes front 3 Remove the 2 screws of the earth terminals R12274 Electrical box cover R8156 R8157 Insulation sheet Earth terminals R8158 ...

Page 12: ...Release the earth wire from the hook 5 Remove the 2 screws and detach the 1 clip to remove the radiation shield plate 6 Cut off the 5 clamps and disconnect the wire harnesses Step Procedure Points R8159 R12198 Radiation shield plate Clip R8161 R8162 ...

Page 13: ... screws in total to remove the PCB 8 Lift up the back side slightly and unfasten the hooks of the front When reassembling make sure that the hooks of the electrical box are placed on the PCB 9 Lift up the PCB Step Procedure Points R8163 R8164 R8166 Hooks R8167 ...

Page 14: ...cedure 10 Remove the PCB 11 Detach the terminals from the terminal board S20 electronic expansion valve coil S40 overload protector S70 fan motor S80 four way valve coil S90 thermistors Step Procedure Points R8168 R8169 S70 S40 S90 S20 S80 ...

Page 15: ...Si001070 Removal of PCB Removal Procedure 13 12 Remove the screw of the radiation fin Step Procedure Points R12214 Radiation fin R8171 ...

Page 16: ...ve the partition plate When reassembling fit the lower hooks into the bottom frame 1 Remove the 2 screws 2 3 The partition plate has hooks on the lower side Lift and pull the partition plate to remove Remove the screw to remove the reactor R12282 Partition plate R14110 R14111 Reactor Notch R13802 Drain pan heater cable Reactor Some models have notches on the lower side of the partition plate When ...

Page 17: ...tring open the sound blanket outer and pull it out 2 Remove the sound blanket top upper The design of the sound blankets is different depending on the models 3 Remove the sound blanket top lower 4 Open the sound blanket inner and pull it out Step Procedure Points R12199 Sound blanket outer R8180 R12200 Sound blanket top upper R8178 Sound blanket top lower R12201 Sound blanket inner ...

Page 18: ...supplies before disassembling work Step Procedure Points 1 Remove the outdoor fan Nut size M6 1 Remove the washer fitted nut of the outdoor fan 2 Remove the outdoor fan When reassembling align the mark of the outdoor fan with the D cut section of the motor shaft 2 Remove the fan motor 1 Disconnect the connector for the fan motor S70 R8181 10 mm R12236 R8182 D cut R8183 R8184 S70 ...

Page 19: ...001070 Removal of Outdoor Fan Fan Motor Removal Procedure 17 2 The figure shows the arrangement of the fan motor lead wire 3 Cut the clamp Some models do not have clamps Step Procedure Points R8185 R13801 ...

Page 20: ...l of Outdoor Fan Fan Motor Si001070 18 Removal Procedure 4 Remove the 1 screw of the fan motor fixing frame 5 Remove the fan motor fixing frame Step Procedure Points R12202 Fan motor fixing frame R8187 R8188 ...

Page 21: ... fan motor lead wire 7 Release the fan motor lead wire 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 8 Remove the 4 screws and 4 rubber vibration isolators to remove the fan motor Step Procedure Points R8189 R7627 Lead wire Outdoor fan R12215 R8190 R8191 ...

Page 22: ...ints 1 Release the discharge pipe thermistor Be careful not to lose the clip for the thermistor 2 Cut the clamp and pull out the outdoor heat exchanger thermistor 3 The thermistors for outdoor temperature discharge pipe outdoor heat exchanger are united as one assembly 4 The figure shows the arrangement of the thermistors R8192 Discharge pipe thermistor R12279 Clip R8193 Outdoor heat exchanger the...

Page 23: ...ot have a drain pan heater ASSY You can remove the drain pan heater ASSY with the sound blanket on 2 Remove the screw of the mounting clamp 3 Release the drain pan heater ASSY from the ditch between the bottom frame and the outdoor heat exchanger ASSY Remove the wire spring with long nose pliers Take care not to cut your finger by the fins of the outdoor heat exchanger When reassembling hang the w...

Page 24: ...r ASSY Pattern 1 Si001070 22 Removal Procedure 4 Cut the clamp 5 Remove the 3 screws and remove the left side panel 6 The fuses are inside the drain pan heater Step Procedure Points R9352 R12307 Left side panel R9354 Fuse R9355 ...

Page 25: ...re after turning off all power supplies before disassembling work Step Procedure Points 1 Cut the 2 clamps Some models do not have a drain pan heater ASSY Preparation Remove the sound blankets according to the Removal of Partition Plate Sound Blankets 2 Pull out the drain pan heater cable under the compressor 3 Cut the clamp R13791 R13792 Drain pan heater cable R13793 ...

Page 26: ...e aluminum part of the drain pan heater ASSY Lift up the aluminum part A and B at the back and left When reassembling fold back the aluminum part A and B along the bottom frame 6 Remove the left side panel Step Procedure Points R13794 Left side panel Drain pan heater ASSY R13795 R13800 Drain pan heater ASSY Bottom frame A B R13796 ...

Page 27: ...ing You may be injured by the fins 8 Lift the outdoor heat exchanger 9 Peel off the drain pan heater ASSY When reassembling match the drain pan heater ASSY with the holes of the bottom frame When reassembling fold back the aluminum part A and B along the bottom frame The back side of drain pan heater ASSY is adhesive Step Procedure Points R13797 Outdoor heat exchanger R13798 R13799 Drain pan heate...

Page 28: ...ff all power supplies before disassembling work Step Procedure Points 1 Remove the peripheries Preparation Remove the sound blanket Detach the four way valve coil and the 2 clamps and then detach the wire harnesses 1 Remove the screw and remove the four way valve coil 2 Pull out the electronic expansion valve coil 3 Remove the putty 4 Remove the terminal cover R7703 R8203 R8204 R8205 R8195 Termina...

Page 29: ... the refrigerant gas Cautions for restoration 1 Restore the piping by non oxidation brazing 2 It is required to prevent the carbonization of the 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 does not dry In case of difficulty with gas brazing machin...

Page 30: ... 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 deformed Provide a protective sheet or a steel plate so that the brazing flame cannot influence peripheries Step Procedure Points R8209 ...

Page 31: ...or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the terminal cover 2 Disconnect the lead wires of the compressor 3 Unfasten the hooks with a flat screwdriver to remove the overload protector R8195 Terminal cover R8196 Red U Yellow V Blue W U W V R8197 U W V R8198 U W V ...

Page 32: ...en that the refrigerant oil in the compressor catches fire prepare wet cloth so as to extinguish fire immediately Caution From the viewpoint of global environment protection do not discharge the refrigerant gas in the atmosphere Make sure to collect all the refrigerant gas Before working make sure that the refrigerant gas is empty in the circuit Be sure to apply nitrogen replacement when heating u...

Page 33: ...n case of difficulty with gas brazing machine 1 Disconnect the brazed part where is easy to disconnect and restore 2 Cut pipes on the main unit with a tube cutter in order to make it easy to disconnect Note 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 def...

Page 34: ...Revision History Month Year Version Revised contents 01 2013 Si001070 First edition ...

Page 35: ...ries 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 instructi...

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