Daikin FTXN24KVJU Manuel de service

Service ManualInverter PairWall Mounted Type K-SeriesSiUS041111[Applied Models] Inverter Pair : Cooling Only Inverter Pair : Heat Pump

Functions SiUS0411112 List of Functions1. FunctionsCategory FunctionsFTXN09/12KEVJURKN09/12KEVJUFTXN09/12KEVJURXN09/12KEVJUCategory FunctionsFTXN09/12

Troubleshooting SiUS04111192 Service Diagnosis4.11 DC Fan LockRemote Controller DisplayE7Method of Malfunction DetectionAn error is determined with th

SiUS041111 TroubleshootingService Diagnosis 934.12 Input Overcurrent DetectionRemote Controller DisplayE8Method of Malfunction DetectionAn input overc

Troubleshooting SiUS04111194 Service Diagnosis4.13 Four-Way Valve AbnormalityRemote Controller DisplayEAMethod of Malfunction DetectionThe room temper

SiUS041111 TroubleshootingService Diagnosis 95TroubleshootingCheck No.01Refer to P.116Check No.13Refer to P.119Check No.14Refer to P.119Replace the fo

Troubleshooting SiUS04111196 Service Diagnosis4.14 Discharge Pipe Temperature ControlRemote Controller DisplayF3Method of Malfunction DetectionAn erro

SiUS041111 TroubleshootingService Diagnosis 97TroubleshootingCheck No.01Refer to P.116Check No.12Refer to P.118Check No.14Refer to P.119Replace the de

Troubleshooting SiUS04111198 Service Diagnosis4.15 High Pressure Control in CoolingRemote Controller DisplayF6Method of Malfunction DetectionHigh-pres

SiUS041111 TroubleshootingService Diagnosis 99TroubleshootingCheck No.01Refer to P.116Check No.12Refer to P.118Check No.17Refer to P.123Check No.18Ref

Troubleshooting SiUS041111100 Service Diagnosis4.16 Compressor System Sensor AbnormalityRemote Controller DisplayH0Method of Malfunction Detection Th

SiUS041111 TroubleshootingService Diagnosis 1014.17 Position Sensor AbnormalityRemote Controller DisplayH6Method of Malfunction DetectionA compressor

SiUS041111 FunctionsList of Functions 3Category FunctionsFTXN15/18/24KVJURKN15/18/24KEVJUFTXN15/18/24KVJURXN15/18/24KEVJUCategory FunctionsFTXN15/18/2

Troubleshooting SiUS041111102 Service DiagnosisTroubleshootingCheck No.15Refer to P.120Check No.18Refer to P.124Check No.20Refer to P.125CautionBe sur

SiUS041111 TroubleshootingService Diagnosis 1034.18 DC Voltage / Current Sensor Abnormality (09/12 Class Only)Remote Controller DisplayH8Method of Mal

Troubleshooting SiUS041111104 Service Diagnosis4.19 Thermistor or Related Abnormality (Outdoor Unit)Remote Controller Display H9, J3, J6, P4Method of

SiUS041111 TroubleshootingService Diagnosis 105Troubleshooting In case of “H9” “J3” “J6”Check No.01Refer to P.116H9 : Outdoor temperature thermistorJ3

Troubleshooting SiUS041111106 Service Diagnosis4.20 Electrical Box Temperature RiseRemote Controller DisplayL3Method of Malfunction DetectionAn electr

SiUS041111 TroubleshootingService Diagnosis 107TroubleshootingCheck No.17Refer to P.123Check No.19Refer to P.124CautionTo cool the electrical componen

Troubleshooting SiUS041111108 Service Diagnosis4.21 Radiation Fin Temperature RiseRemote Controller DisplayL4Method of Malfunction DetectionA radiatio

SiUS041111 TroubleshootingService Diagnosis 109TroubleshootingCheck No.17Refer to P.123Check No.19Refer to P.124Note: Refer to “Application of silicon

Troubleshooting SiUS041111110 Service Diagnosis4.22 Output Overcurrent DetectionRemote Controller DisplayL5Method of Malfunction DetectionAn output ov

SiUS041111 TroubleshootingService Diagnosis 111TroubleshootingCheck No.15Refer to P.120Check No.17Refer to P.123Check No.18Refer to P.124Check No.22Re

SiUS0411114 SpecificationsPart 2Specifications1. Specifications...

Troubleshooting SiUS041111112 Service Diagnosis4.23 Refrigerant ShortageRemote Controller DisplayU0Method of Malfunction DetectionRefrigerant shortage

SiUS041111 TroubleshootingService Diagnosis 113TroubleshootingCheck No.01Refer to P.116Check No.12Refer to P.118(R14447)CautionYESNGNONOYESYESYESNOYES

Troubleshooting SiUS041111114 Service Diagnosis4.24 Low-voltage Detection or Over-voltage DetectionRemote Controller DisplayU2Method of Malfunction De

SiUS041111 TroubleshootingService Diagnosis 115TroubleshootingCorrect the power supply.Replace the outdoor unit PCB.Check for such factors for a long

Check SiUS041111116 Service Diagnosis5. Check5.1 Thermistor Resistance CheckCheck No.01 Disconnect the connectors of the thermistors from the PCB, and

SiUS041111 CheckService Diagnosis 1175.2 Fan Motor Connector Output CheckCheck No.02 FTXN15/18/24KVJU1. Check the connection of connector.2. Check the

Check SiUS041111118 Service Diagnosis5.3 Power Supply Waveforms CheckCheck No.11 Measure the power supply waveform between No. 1 and No. 2 on the term

SiUS041111 CheckService Diagnosis 1195.5 Four-Way Valve Performance CheckCheck No.135.6 Inverter Unit Refrigerant System CheckCheck No.14(R14673)NOYES

Check SiUS041111120 Service Diagnosis5.7 “Inverter Checker” CheckCheck No.15  CharacteristicsIf an abnormal stop occurs due to compressor startup fai

SiUS041111 CheckService Diagnosis 121Step 309/12 class: Activate power transistor test operation from indoor unit.1) Turn the power on.2) Select FAN o

SiUS041111 SpecificationsSpecifications 51. Specifications1.1 Cooling Only60 Hz, 208 - 230 VNote:  The data are based on the conditions shown in the

Check SiUS041111122 Service Diagnosis5.8 Rotation Pulse Check on the Outdoor Unit PCBCheck No.16 09/12 class1. Check that the voltage between the pins

SiUS041111 CheckService Diagnosis 1235.9 Installation Condition CheckCheck No.17OKCheck the allowable dimensions of the air suction and discharge area

Check SiUS041111124 Service Diagnosis5.10 Discharge Pressure CheckCheck No.185.11 Outdoor Fan System CheckCheck No.19 DC motorIs the air filter or ind

SiUS041111 CheckService Diagnosis 1255.12 Main Circuit Short CheckCheck No.20Note: Check to make sure that the voltage between (+) and (–) of the diod

Check SiUS041111126 Service Diagnosis15/18/24 class5.13 Power Module CheckCheck No.22Note: Check to make sure that the voltage between (+) and (–) of

SiUS041111Removal Procedure 127Part 7Removal Procedure1. Indoor Unit: 09/12 Class...

Indoor Unit: 09/12 Class SiUS041111128 Removal Procedure1. Indoor Unit: 09/12 Class1.1 Removal of Air FiltersProcedure Warning Be sure to wait for 10

SiUS041111 Indoor Unit: 09/12 ClassRemoval Procedure 1293Pull out the air filter downward and remove it.3. Remove the Titanium apatite photocatalytic

Indoor Unit: 09/12 Class SiUS041111130 Removal Procedure1.2 Removal of Horizontal BladeProcedure Warning Be sure to wait for 10 minutes or more after

SiUS041111 Indoor Unit: 09/12 ClassRemoval Procedure 1315Remove the horizontal blade.Step Procedure Points(R11626)

Specifications SiUS0411116 Specifications60 Hz, 208 - 230 VNote:  The data are based on the conditions shown in the table below.ModelIndoor Unit FTXN

Indoor Unit: 09/12 Class SiUS041111132 Removal Procedure1.3 Removal of Front PanelProcedure Warning Be sure to wait for 10 minutes or more after turni

SiUS041111 Indoor Unit: 09/12 ClassRemoval Procedure 1331.4 Removal of Front GrilleProcedure Warning Be sure to wait for 10 minutes or more after turn

Indoor Unit: 09/12 Class SiUS041111134 Removal Procedure1.5 Removal of Electrical Box / Vertical BladesProcedure Warning Be sure to wait for 10 minute

SiUS041111 Indoor Unit: 09/12 ClassRemoval Procedure 1355Loosen the screws of the terminal board and disconnect the connecting wires. Connecting wire

Indoor Unit: 09/12 Class SiUS041111136 Removal Procedure2Disconnect the connector for the fan motor [S200].Release the fan motor harnesses from the ho

SiUS041111 Indoor Unit: 09/12 ClassRemoval Procedure 1373. Remove the vertical blade assembly. Narrow the edges of the hook to unfasten it.1Unfasten

Indoor Unit: 09/12 Class SiUS041111138 Removal Procedure4Unfasten the 3 hooks at the shaft mounting part by pressing them with a flat screwdriver.5Rem

SiUS041111 Indoor Unit: 09/12 ClassRemoval Procedure 1391.6 Removal of Swing Motor / PCBsProcedure Warning Be sure to wait for 10 minutes or more afte

Indoor Unit: 09/12 Class SiUS041111140 Removal Procedure2Unfasten the hook, and disconnect the connector. The connector of the swing motor has a hook

SiUS041111 Indoor Unit: 09/12 ClassRemoval Procedure 1413Disconnect the connector [S27] from the display PCB.4The figure shows the component parts of

SiUS041111 SpecificationsSpecifications 760 Hz, 208 - 230 VNote:  The data are based on the conditions shown in the table below.ModelIndoor Unit FTXN

Indoor Unit: 09/12 Class SiUS041111142 Removal Procedure4Disconnect the terminals from the terminal board with pliers.1 : black, upper2 : white, lower

SiUS041111 Indoor Unit: 09/12 ClassRemoval Procedure 1431.7 Removal of Indoor Heat ExchangerProcedure Warning Be sure to wait for 10 minutes or more a

Indoor Unit: 09/12 Class SiUS041111144 Removal Procedure5Disconnect the flare nut for liquid piping with 2 wrenches.2. Remove the indoor heat exchange

SiUS041111 Indoor Unit: 09/12 ClassRemoval Procedure 1453Widen the auxiliary piping to the extent of 10° ~ 20°. 4Remove the screw on the left side and

Indoor Unit: 09/12 Class SiUS041111146 Removal Procedure1.8 Removal of Fan Rotor / Fan MotorProcedure Warning Be sure to wait for 10 minutes or more a

SiUS041111 Indoor Unit: 09/12 ClassRemoval Procedure 1472. Remove the fan rotor and the fan motor.1The fan motor has 3 projections on the right side.T

Indoor Unit: 09/12 Class SiUS041111148 Removal Procedure5Unfasten the 2 hooks of the motor cover.6Pull out the fan motor from the fan rotor to remove.

SiUS041111 Indoor Unit: 09/12 ClassRemoval Procedure 1491.9 Exchange of Piping Direction (Drain Hose)Procedure Warning Be sure to wait for 10 minutes

Indoor Unit: 15/18/24 Class SiUS041111150 Removal Procedure2. Indoor Unit: 15/18/24 Class2.1 Removal of Air Filters / Front PanelProcedure Warning Be

SiUS041111 Indoor Unit: 15/18/24 ClassRemoval Procedure 1512. Remove the Titanium apatite photocatalytic air-purifying filters.1Push up the bottom of

Specifications SiUS0411118 Specifications1.2 Heat Pump60 Hz, 208 - 230 VNote:  The data are based on the conditions shown in the table below.ModelInd

Indoor Unit: 15/18/24 Class SiUS041111152 Removal Procedure3. Remove the front panel.1While opening the front panel further than it stops, release bot

SiUS041111 Indoor Unit: 15/18/24 ClassRemoval Procedure 1532.2 Removal of Front GrilleProcedure Warning Be sure to wait for 10 minutes or more after t

Indoor Unit: 15/18/24 Class SiUS041111154 Removal Procedure2Unfasten the 3 hooks on the top of the front grille. The convex marks (...) on the front

SiUS041111 Indoor Unit: 15/18/24 ClassRemoval Procedure 1552.3 Removal of Horizontal Blades / Vertical BladesProcedure Warning Be sure to wait for 10

Indoor Unit: 15/18/24 Class SiUS041111156 Removal Procedure2. Remove the vertical blades. Remove the fan guards beforehand. The unit has 3 sets of v

SiUS041111 Indoor Unit: 15/18/24 ClassRemoval Procedure 1572.4 Removal of Electrical Box / PCBs / Swing MotorsProcedure Warning Be sure to wait for 10

Indoor Unit: 15/18/24 Class SiUS041111158 Removal Procedure6Remove the screw and remove the terminal board. You can remove the electrical box without

SiUS041111 Indoor Unit: 15/18/24 ClassRemoval Procedure 15910Dislocate the electrical box to the left and unfasten the back hook.  The electrical box

Indoor Unit: 15/18/24 Class SiUS041111160 Removal Procedure3Press the signal receiver unit down and unfasten the hooks on the upper side, and then unf

SiUS041111 Indoor Unit: 15/18/24 ClassRemoval Procedure 1617Unfasten the 2 hooks on the lower side, and then the 2 hooks on the upper side. Remove the

SiUS041111 SpecificationsSpecifications 960 Hz, 208 - 230VNote:  The data are based on the conditions shown in the table below.ModelIndoor Unit FTXN1

Indoor Unit: 15/18/24 Class SiUS041111162 Removal Procedure2.5 Removal of Indoor Heat ExchangerProcedure Warning Be sure to wait for 10 minutes or mor

SiUS041111 Indoor Unit: 15/18/24 ClassRemoval Procedure 1632. Remove the indoor unit.1Remove the indoor unit from the installation plate.3. Remove the

Indoor Unit: 15/18/24 Class SiUS041111164 Removal Procedure3Unfasten the hooks on the left side.CautionWhen removing or reassembling the indoor heat e

SiUS041111 Indoor Unit: 15/18/24 ClassRemoval Procedure 1652.6 Removal of Fan Motor / Fan RotorProcedure Warning Be sure to wait for 10 minutes or mor

Indoor Unit: 15/18/24 Class SiUS041111166 Removal Procedure3Remove the fan motor.  When reassembling the fan motor and the fan rotor, provide as much

SiUS041111 Outdoor Unit: 09/12 ClassRemoval Procedure 1673. Outdoor Unit: 09/12 ClassNote: The illustrations are for heat pump models as representativ

Outdoor Unit: 09/12 Class SiUS041111168 Removal Procedure2Remove the 3 screws (right: 1 screw, left: 2 screws) and remove the top panel.3Remove the 5

SiUS041111 Outdoor Unit: 09/12 ClassRemoval Procedure 16967Remove the 4 screws of the discharge grille.Unfasten the 6 hooks and remove the discharge g

Outdoor Unit: 09/12 Class SiUS041111170 Removal Procedure3Remove the 2 screws.4Remove the conduit.5Remove the conduit mounting plate.Step Procedure Po

SiUS041111 Outdoor Unit: 09/12 ClassRemoval Procedure 1713.2 Removal of Outdoor Fan / Fan MotorProcedure Warning Be sure to wait for 10 minutes or mor

Specifications SiUS04111110 Specifications60 Hz, 208 - 230VNote:  The data are based on the conditions shown in the table below.ModelIndoor Unit FTXN

Outdoor Unit: 09/12 Class SiUS041111172 Removal Procedure3Remove the screw and remove the fan motor fixing frame. When reassembling, put the fan moto

SiUS041111 Outdoor Unit: 09/12 ClassRemoval Procedure 1733.3 Removal of Electrical Box / PCBProcedure Warning Be sure to wait for 10 minutes or more a

Outdoor Unit: 09/12 Class SiUS041111174 Removal Procedure3Remove the 4 screws on the right side panel.4Unfasten the hook on the rear side. When reass

SiUS041111 Outdoor Unit: 09/12 ClassRemoval Procedure 1752. Remove the thermistors. Pay attention so as not to lose the fixture for thermistor. When

Outdoor Unit: 09/12 Class SiUS041111176 Removal Procedure4Cut the clamp.5Release the harnesses.6Disconnect the connector for the thermistors [S90].[S9

SiUS041111 Outdoor Unit: 09/12 ClassRemoval Procedure 1773. Remove the electrical box.1Disconnect the connector for the overload protector [S40].2Disc

Outdoor Unit: 09/12 Class SiUS041111178 Removal Procedure4Disconnect the relay connector for the compressor motor.5Release the harnesses from the hook

SiUS041111 Outdoor Unit: 09/12 ClassRemoval Procedure 1797Lift and remove the electrical box.4. Remove the control PCB.1Disconnect the 2 terminals of

Outdoor Unit: 09/12 Class SiUS041111180 Removal Procedure3Cut the clamp.4Remove the 3 screws and remove the reactor.5Disconnect the 3 connectors for t

SiUS041111 Outdoor Unit: 09/12 ClassRemoval Procedure 1816Release the harnesses.7Remove the 6 screws.8Unfasten the 2 hooks.9Lift and remove the contro

SiUS041111Printed Circuit Board Connector Wiring Diagram 11Part 3Printed Circuit BoardConnector Wiring Diagram1. Indoor Unit...

Outdoor Unit: 09/12 Class SiUS041111182 Removal Procedure10Feature of the control PCB[S10] [HN3] [HL3]: filter PCB[S20]: electronic expansion valve co

SiUS041111 Outdoor Unit: 09/12 ClassRemoval Procedure 1833Release the harnesses from the hook.4Remove the screw.Step Procedure Points(R11787)(R11788)

Outdoor Unit: 09/12 Class SiUS041111184 Removal Procedure5Unfasten the 2 hooks.6Release the harnesses.7Remove the filter PCB.Step Procedure Points(R11

SiUS041111 Outdoor Unit: 09/12 ClassRemoval Procedure 1853.4 Removal of Sound BlanketsProcedure Warning Be sure to wait for 10 minutes or more after t

Outdoor Unit: 09/12 Class SiUS041111186 Removal Procedure2. Remove the sound blankets. Since the piping ports on the sound blanket are torn easily, r

SiUS041111 Outdoor Unit: 09/12 ClassRemoval Procedure 1873.5 Removal of Four-Way ValveProcedure Warning Be sure to wait for 10 minutes or more after t

Outdoor Unit: 09/12 Class SiUS041111188 Removal Procedure5Remove the electronic expansion valve coil.6Remove the putty.Step Procedure Points(R11798)El

SiUS041111 Outdoor Unit: 09/12 ClassRemoval Procedure 189 Before working, make sure that the refrigerant gas is empty in the circuit. Be sure to app

Outdoor Unit: 09/12 Class SiUS041111190 Removal Procedure3.6 Removal of CompressorProcedure Warning Be sure to wait for 10 minutes or more after turni

SiUS041111 Outdoor Unit: 15/18/24 ClassRemoval Procedure 1914. Outdoor Unit: 15/18/24 ClassNote: The illustrations are for heat pump models as represe

SiUS041111i Table of ContentsInverter PairWall Mounted TypeK-SeriesCooling OnlyIndoor UnitFTXN09KEVJUFTXN12KEVJUFTXN15KVJUFTXN18KVJUFTXN24KVJUOutdoor

Indoor Unit SiUS04111112 Printed Circuit Board Connector Wiring Diagram1. Indoor Unit1.1 09/12 ClassConnectors and Other PartsPCB(1): Control PCBPCB(2

Outdoor Unit: 15/18/24 Class SiUS041111192 Removal Procedure4 Unfasten the right side hooks.5 Unfasten the left side hooks.Remove the front panel. Wh

SiUS041111 Outdoor Unit: 15/18/24 ClassRemoval Procedure 1937 Pull down the stop valve cover to unfasten the hooks and remove it. The stop valve cove

Outdoor Unit: 15/18/24 Class SiUS041111194 Removal Procedure4.2 Removal of Outdoor Fan / Fan MotorProcedure Warning Be sure to wait for 10 minutes or

SiUS041111 Outdoor Unit: 15/18/24 ClassRemoval Procedure 1954 Release the fan motor lead wire from the groove and the 2 hooks of the partition plate.

Outdoor Unit: 15/18/24 Class SiUS041111196 Removal Procedure6 Remove the screw of the fan motor fixing frame.7 Pull down the fan motor fixing frame to

SiUS041111 Outdoor Unit: 15/18/24 ClassRemoval Procedure 1979 Open the hook and release the fan motor lead wire.10 Remove the 4 screws and remove the

Outdoor Unit: 15/18/24 Class SiUS041111198 Removal Procedure4.3 Removal of Electrical BoxProcedure Warning Be sure to wait for 10 minutes or more afte

SiUS041111 Outdoor Unit: 15/18/24 ClassRemoval Procedure 1995 Remove the screws and remove the connecting wires.6 Pull out the outdoor temperature the

Outdoor Unit: 15/18/24 Class SiUS041111200 Removal Procedure8 Unfasten the 2 lower hooks and the 1 upper hook.Remove the right side panel. When reass

SiUS041111 Outdoor Unit: 15/18/24 ClassRemoval Procedure 20111 Peel off the filament tape.12 Disconnect the connector for the fan motor [S70].13 Disco

SiUS041111 Indoor UnitPrinted Circuit Board Connector Wiring Diagram 13PCB Detail PCB(1): Control PCBPCB(2): Display PCBFU1H1H3V1H2FGS200 LED A S32S26

Outdoor Unit: 15/18/24 Class SiUS041111202 Removal Procedure14 Pull out the clamp.15 Disconnect the connector for the electronic expansion valve coil

SiUS041111 Outdoor Unit: 15/18/24 ClassRemoval Procedure 20318 Disconnect the connector for the overload protector [S40]. When reassembling, insert t

Outdoor Unit: 15/18/24 Class SiUS041111204 Removal Procedure22 Disconnect the connector for the thermistors [S90].23 Pull out the clamp.  When reasse

SiUS041111 Outdoor Unit: 15/18/24 ClassRemoval Procedure 20526 Remove the screw.27 Pull out the 2 clamps at the bottom of the electrical box. When re

Outdoor Unit: 15/18/24 Class SiUS041111206 Removal Procedure4.4 Removal of PCBsProcedure Warning Be sure to wait for 10 minutes or more after turning

SiUS041111 Outdoor Unit: 15/18/24 ClassRemoval Procedure 2074 Pull out the clamp.  When reassembling, insert the clamp as below.5 Remove the 2 upper

Outdoor Unit: 15/18/24 Class SiUS041111208 Removal Procedure7 Lift the main PCB assembly.8 Unfasten the 4 hooks at the bottom.9 Remove the 8 screws.St

SiUS041111 Outdoor Unit: 15/18/24 ClassRemoval Procedure 20910 Unfasten the 2 hooks. Refer to page 19 for detail.11 Remove the main PCB. [S10]: filte

Outdoor Unit: 15/18/24 Class SiUS041111210 Removal Procedure3. Remove the filter PCB.1 Remove the ground screw.2 Pull out the terminals from the termi

SiUS041111 Outdoor Unit: 15/18/24 ClassRemoval Procedure 2115 Remove the 2 screws.6 Unfasten the 3 hooks of the filter PCB assembly.7 Remove the 1 scr

Indoor Unit SiUS04111114 Printed Circuit Board Connector Wiring Diagram1.2 15/18/24 ClassConnectors and Other PartsPCB (1): Control PCBPCB (2): Signal

Outdoor Unit: 15/18/24 Class SiUS041111212 Removal Procedure8 Unfasten the 2 hooks.9 Remove the filter PCB.  Refer to page 19 for detail.Step Procedu

SiUS041111 Outdoor Unit: 15/18/24 ClassRemoval Procedure 2134.5 Removal of Sound BlanketsProcedure Warning Be sure to wait for 10 minutes or more afte

Outdoor Unit: 15/18/24 Class SiUS041111214 Removal Procedure2. Remove the sound blankets. Since the piping ports are torn easily, remove the sound bl

SiUS041111 Outdoor Unit: 15/18/24 ClassRemoval Procedure 2154 Remove the sound blanket (side-outer).5 Remove the sound blanket (side-inner).Step Proce

Outdoor Unit: 15/18/24 Class SiUS041111216 Removal Procedure4.6 Removal of Electronic Expansion Valve AssemblyProcedure Warning Be sure to wait for 10

SiUS041111 Outdoor Unit: 15/18/24 ClassRemoval Procedure 2174.7 Removal of Four-Way Valve Removal of Four Way ValveProcedure Warning Be sure to wait f

Outdoor Unit: 15/18/24 Class SiUS041111218 Removal Procedure4.8 Removal of CompressorProcedure Warning Be sure to wait for 10 minutes or more after tu

SiUS041111 Outdoor Unit: 15/18/24 ClassRemoval Procedure 2194 Remove the 3 nuts of the compressor.Cautions for restoration1. Restore the piping by non

SiUS041111220 Trial Operation and Field SettingsPart 8Trial Operation andField Settings1. Pump Down Operation...

SiUS041111 Pump Down OperationTrial Operation and Field Settings 2211. Pump Down OperationOutline In order to protect the environment, be sure to cond

SiUS041111 Indoor UnitPrinted Circuit Board Connector Wiring Diagram 15PCB Detail PCB (1): Control PCBPCB (2): Signal Receiver PCB PCB (3): Buzzer PCB

Forced Cooling Operation SiUS041111222 Trial Operation and Field Settings2. Forced Cooling OperationIndoor Unit (09/12 class)Indoor Unit (15/18/24 cla

SiUS041111 Trial OperationTrial Operation and Field Settings 2233. Trial OperationOutline 1. Measure the supply voltage and make sure that it falls in

Field Settings SiUS041111224 Trial Operation and Field Settings4. Field Settings4.1 Model Type SettingARC452A19, 20 This remote controller is common

SiUS041111 Field SettingsTrial Operation and Field Settings 2254.3 When 2 Units are Installed in 1 RoomWhen 2 indoor units are installed in 1 room, 1

Field Settings SiUS041111226 Trial Operation and Field Settings4.4 Facility Setting Switch (cooling at low outdoor temperature)Outline This function i

SiUS041111 Field SettingsTrial Operation and Field Settings 2274.5 Jumper SettingsFor the location of the jumper, refer to the following pages.Indoor

Application of Silicon Grease to a Power Transistor and a Diode Bridge SiUS041111228 Trial Operation and Field Settings5. Application of Silicon Greas

SiUS041111Appendix 229Part 9Appendix1. Piping Diagrams...2301.1 Ind

Piping Diagrams SiUS041111230 Appendix1. Piping Diagrams1.1 Indoor unitFTXN09/12KEVJUFTXN15/18/24KVJUINDOOR UNITHEAT EXCHANGER9/32CuT3/16CuT9/32CuT9/3

SiUS041111 Piping DiagramsAppendix 2311.2 Outdoor UnitRKN09/12KEVJURKN15/18/24KEVJUOUTDOOR UNITHEAT EXCHANGER9/32CuT9/32CuT3/8CuT3/16CuT1/4CuT1/4CuT3/

Outdoor Unit SiUS04111116 Printed Circuit Board Connector Wiring Diagram2. Outdoor Unit2.1 09/12 ClassConnectors and Other PartsPCB(1): Filter PCBPCB(

Piping Diagrams SiUS041111232 AppendixRXN09/12KEVJURXN15/18/24KEVJUOUTDOOR UNITHEAT EXCHANGER9/32CuT9/32CuT3/8CuT3/16CuT1/4CuT 1/4CuT3/16CuTMPROPELLER

SiUS041111 Wiring DiagramsAppendix 2332. Wiring Diagrams2.1 Indoor UnitFTXN09/12KEVJUFTXN15/18/24KVJUPCB 2PCB 1S26S27FIELD WIRING.BLK19BLKBLKGRN/YLWLE

Wiring Diagrams SiUS041111234 Appendix2.2 Outdoor UnitRKN09/12KEVJU, RXN09/12KEVJURKN15/18/24KEVJU, RXN15/18/24KEVJUC: 3D065924ENOTE1.REFER TO THE NAM

1645 Wallace Drive, Suite 110Carrollton, [email protected] ISO 9001 is a plant certification systemdefined by t

SiUS041111 Outdoor UnitPrinted Circuit Board Connector Wiring Diagram 17PCB Detail PCB(1): Filter PCBPCB(2): Main PCBHR1S11HL2HN2E1, E2V2AC2AC1SFU33P2

Outdoor Unit SiUS04111118 Printed Circuit Board Connector Wiring Diagram2.2 15/18/24 ClassConnectors and Other PartsPCB (1): Filter PCBPCB (2): Main P

SiUS041111 Outdoor UnitPrinted Circuit Board Connector Wiring Diagram 19PCB Detail PCB (1): Filter PCBPCB (2): Main PCB3P273862-1SW1S11FU1FU3 V2 V3E2,

SiUS04111120 Function and ControlPart 4Function and Control1. Main Functions...

SiUS041111 Main FunctionsFunction and Control 211. Main Functions1.1 Temperature ControlDefinitions of TemperaturesThe definitions of temperatures are

SiUS041111Table of Contents iiSafety Consideration...viPart 1List of Functions ...

Main Functions SiUS04111122 Function and ControlInverter Principle To regulate the capacity, a frequency control is needed. The inverter makes it poss

SiUS041111 Main FunctionsFunction and Control 23Frequency Limits The following functions regulate the minimum and maximum frequency:Forced Cooling Ope

Main Functions SiUS04111124 Function and Control1.4 Fan Speed Control for Indoor UnitOutline Phase control and fan speed control contains 9 steps: LLL

SiUS041111 Main FunctionsFunction and Control 25COMFORT AIRFLOW Operation09/12 class The fan speed is controlled automatically. The latest command h

Main Functions SiUS04111126 Function and Control1.6 Automatic OperationOutline Automatic Cooling / Heating FunctionWhen the AUTO mode is selected with

SiUS041111 Main FunctionsFunction and Control 271.7 Thermostat ControlThermostat control is based on the difference between the room thermistor temper

Main Functions SiUS04111128 Function and Control1.8 NIGHT SET ModeOutline When the OFF timer is set, the NIGHT SET Mode is automatically activated. Th

SiUS041111 Main FunctionsFunction and Control 291.9 ECONO Operation09/12 classThe "ECONO operation" reduces the maximum operating current an

Main Functions SiUS04111130 Function and Control1.10 Inverter POWERFUL OperationOutline In order to exploit the cooling and heating capacity to full e

SiUS041111 Main FunctionsFunction and Control 311.11 Other Functions1.11.1 Hot-Start FunctionIn order to prevent the cold air blast that normally come

SiUS041111iii Table of Contents3.4 Discharge Pipe Temperature Control...393.5 Input Current Cont

Function of Thermistor SiUS04111132 Function and Control2. Function of Thermistor(1) Outdoor Heat Exchanger Thermistor 1. The outdoor heat exchanger

SiUS041111 Control SpecificationFunction and Control 333. Control Specification3.1 Mode HierarchyOutline There are two modes; the one is the normal op

Control Specification SiUS04111134 Function and Control3.2 Frequency ControlOutline Frequency is determined according to the difference between the ro

SiUS041111 Control SpecificationFunction and Control 352. Determine upper limit frequency The minimum value is set as an upper limit frequency among

Control Specification SiUS04111136 Function and Control3.3 Controls at Mode Changing / Start-up3.3.1 Preheating OperationOutline The inverter operatio

SiUS041111 Control SpecificationFunction and Control 373.3.3 Four-Way Valve Operation CompensationOutline At the beginning of the operation as the fou

Control Specification SiUS04111138 Function and Control 15/18/24 classA (Hz) 52B (Hz) 66C (Hz) 78D (Hz) Cooling: 98, Heating: 96E (seconds) 120F (sec

SiUS041111 Control SpecificationFunction and Control 393.4 Discharge Pipe Temperature ControlOutline The discharge pipe temperature is used as the int

Control Specification SiUS04111140 Function and Control3.5 Input Current ControlOutline The microcomputer calculates the input current during the comp

SiUS041111 Control SpecificationFunction and Control 413.6 Freeze-up Protection ControlOutline During cooling operation, the signal sent from the indo

SiUS041111Table of Contents iv4.8 Outdoor Unit PCB Abnormality...894.9 OL Activation (

Control Specification SiUS04111142 Function and Control3.8 Outdoor Fan Control1. Fan OFF delay when stoppedThe outdoor fan is turned OFF 70 seconds af

SiUS041111 Control SpecificationFunction and Control 433.10 Defrost ControlOutline Defrosting is carried out by the cooling cycle (reverse cycle). The

Control Specification SiUS04111144 Function and Control 15/18/24 classThe judgment is made with outdoor heat exchanger temperature. (6 ~ 30°C, 42.8 ~

SiUS041111 Control SpecificationFunction and Control 453.11 Electronic Expansion Valve ControlOutline The following items are included in the electron

Control Specification SiUS04111146 Function and Control3.11.1 Fully Closing with Power ONThe electronic expansion valve is initialized when turning on

SiUS041111 Control SpecificationFunction and Control 473.11.7 Control for Disconnection of the Discharge Pipe ThermistorOutline The disconnection of t

Control Specification SiUS04111148 Function and Control3.12 Malfunctions3.12.1 Sensor Malfunction DetectionSensor malfunction may occur in the thermis

SiUS041111Operation Manual 49Part 5Operation Manual1. System Configuration...

System Configuration SiUS04111150 Operation Manual1. System ConfigurationAfter installation and test operation of the room air conditioner are complet

SiUS041111 09/12 ClassOperation Manual 512. 09/12 Class2.1 Remote Controller7<ARC452A19>Name of PartsRemote ControllerSignal transmitterReceiver

SiUS041111v Table of Contents2.3 Removal of Horizontal Blades / Vertical Blades...1552.4 Removal of Electrical Box

09/12 Class SiUS04111152 Operation Manual8  Open the front coverMODE selector button• Selects the operation mode.(AUTO/DRY/COOL/HEAT/FAN)Page 11Page

SiUS041111 09/12 ClassOperation Manual 532.2 AUTO · DRY · COOL · HEAT · FAN Operation 2.111. COOLAUTO DRYCOOLHEAT FANPress DisplayNOTEMODE Notes on ea

09/12 Class SiUS04111154 Operation Manual12 To change the temperature settingPress or• The displayed items on the LCD will change whenever ei

SiUS041111 09/12 ClassOperation Manual 552.3 Adjusting the Airflow Direction and Rate13Press Adjusting the Airflow Direction and RateYou can adjust th

09/12 Class SiUS04111156 Operation Manual14Press .45˚5˚15˚45˚50˚45˚5˚0˚0˚0˚ To adjust the airflow rate setting• Each pressing of advances the

SiUS041111 09/12 ClassOperation Manual 572.4 COMFORT AIRFLOW Operation15 . oCOMFORT AIRFLOW OperationThe flow of air will be in the upward direction w

09/12 Class SiUS04111158 Operation Manual2.5 POWERFUL Operation16POWERFUL OperationPOWERFUL operation quickly maximizes the cooling (heating) effect i

SiUS041111 09/12 ClassOperation Manual 592.6 ECONO Operation17ECONO OperationECONO operation is a function which enables efficient operation by limiti

09/12 Class SiUS04111160 Operation Manual2.7 OFF TIMER OperationOFF TIMER OperationTimer functions are useful for automatically switching the air cond

SiUS041111 09/12 ClassOperation Manual 612.8 ON TIMER Operation19ON TIMER Operation To cancel ON TIMER operation  To use ON TIMER operation To comb

SiUS041111viSafety ConsiderationsRead these SAFETY CONSIDERATIONS carefully before performing any repair work. Comply with these safety symbols withou

15/18/24 Class SiUS04111162 Operation Manual3. 15/18/24 Class3.1 Remote Controller7Name of PartsRemote ControllerSignal transmitterReceiver• To use th

SiUS041111 15/18/24 ClassOperation Manual 638 Open the front cover Page 11 • Selects the operation mode. (AUTO/DRY/COOL/HEAT/FAN) MODE selector butto

15/18/24 Class SiUS04111164 Operation Manual3.2 AUTO · DRY · COOL · HEAT · FAN Operation111. COOLPress 2. DisplayAUTO · DRY · COOL · HEAT · FAN Operat

SiUS041111 15/18/24 ClassOperation Manual 6512Press or . To change the temperature setting• The displayed items on the LCD will change

15/18/24 Class SiUS04111166 Operation Manual3.3 Adjusting the Airflow Direction and Rate13Adjusting the Airflow Direction and RateYou can adjust the a

SiUS041111 15/18/24 ClassOperation Manual 6714NOTE10˚40˚15˚55˚5˚55˚5˚35˚CAUTIONPress . To adjust the airflow rate setting• Each pressing of

15/18/24 Class SiUS04111168 Operation Manual3.4 POWERFUL Operation Notes on POWERFUL operation• When using POWERFUL operation, there are some functio

SiUS041111 15/18/24 ClassOperation Manual 693.5 OFF TIMER Operation16OFF TIMER OperationTimer functions are useful for automatically switching the air

15/18/24 Class SiUS04111170 Operation Manual3.6 ON TIMER Operation17ON TIMER Operation To use ON TIMER operation To cancel ON TIMER operation• Check

SiUS041111Service Diagnosis 71Part 6Service Diagnosis1. Troubleshooting with LED...

SiUS041111vii• Do not repair the electrical components with wet hands. Working on the equipment with wet hands may cause an electrical shock.• Do not

SiUS04111172 Service Diagnosis5.11 Outdoor Fan System Check...1245.12 Main Circuit S

SiUS041111 Troubleshooting with LEDService Diagnosis 731. Troubleshooting with LED1.1 Indoor UnitOperation Lamp The operation lamp blinks when any of

Problem Symptoms and Measures SiUS04111174 Service Diagnosis2. Problem Symptoms and MeasuresSymptom Check Item Details of MeasureReferencePageThe unit

SiUS041111 Service Check FunctionService Diagnosis 753. Service Check FunctionCheck Method 1 1. When the timer cancel button is held down for 5 second

Service Check Function SiUS04111176 Service DiagnosisCheck Method 21. Press the 3 buttons (TEMP, TEMP, MODE) simultaneously to enter the diagnosis m

SiUS041111 Service Check FunctionService Diagnosis 775. Press the TEMP or buttonand change the figure until you hear the beep(s).6. Diagnose by th

Troubleshooting SiUS04111178 Service Diagnosis4. Troubleshooting4.1 Error Codes and Description: Displayed only when system-down occurs.Error Codes D

SiUS041111 TroubleshootingService Diagnosis 794.2 Indoor Unit PCB AbnormalityRemote Controller DisplayA1Method of Malfunction DetectionThe system chec

Troubleshooting SiUS04111180 Service Diagnosis4.3 Freeze-up Protection Control or Heating Peak-cut ControlRemote Controller DisplayA5Method of Malfunc

SiUS041111 TroubleshootingService Diagnosis 81TroubleshootingCheck No.01Refer to P.116NONONOCheck No. 01Check the indoor heat exchanger thermistor.YES

SiUS041111List of Functions 1Part 1List of Functions1. Functions...

Troubleshooting SiUS04111182 Service Diagnosis4.4 Fan Motor (DC Motor) or Related AbnormalityRemote Controller DisplayA6Method of Malfunction Detectio

SiUS041111 TroubleshootingService Diagnosis 83Troubleshooting FTXN09/12KEVJUCheck No.03Refer to P.117(R14405)Turn off the power.(Unplug the power cabl

Troubleshooting SiUS04111184 Service DiagnosisTroubleshooting FTXN15/18/24KVJUCheck No.02Refer to P.117YESYESNOYESYESNONONONote : The motor may break

SiUS041111 TroubleshootingService Diagnosis 854.5 Thermistor or Related Abnormality (Indoor Unit)Remote Controller DisplayC4, C9Method of Malfunction

Troubleshooting SiUS04111186 Service Diagnosis4.6 Signal Transmission Error (between Indoor Unit and Outdoor Unit)Remote Controller DisplayU4Method of

SiUS041111 TroubleshootingService Diagnosis 87TroubleshootingCheck No.11Refer to P.118Check the voltage of the connection wires on the indoor terminal

Troubleshooting SiUS04111188 Service Diagnosis4.7 Unspecified Voltage (between Indoor Unit and Outdoor Unit)Remote Controller DisplayUAMethod of Malfu

SiUS041111 TroubleshootingService Diagnosis 894.8 Outdoor Unit PCB AbnormalityRemote Controller Display E1Method of Malfunction Detection The system

Troubleshooting SiUS04111190 Service Diagnosis4.9 OL Activation (Compressor Overload)Remote Controller DisplayE5Method of Malfunction DetectionA compr

SiUS041111 TroubleshootingService Diagnosis 914.10 Compressor LockRemote Controller DisplayE6Method of Malfunction DetectionA compressor lock is detec