Daikin FTXS20K2V1B Service Manual

Service ManualInverter PairWall Mounted Type K-SeriesSiBE041134[Applied Models]z Inverter Pair : Heat Pump

Introduction SiBE041134ix1.2 Used IconsIcons are used to attract the attention of the reader to specific information. The meaning of each icon is desc

Troubleshooting SiBE04113490 Service Diagnosis4.19 Position Sensor AbnormalityRemote Controller DisplayH6Method of Malfunction DetectionA compressor s

SiBE041134 TroubleshootingService Diagnosis 91TroubleshootingCheck No.15Refer to P.105Check No.18Refer to P.107Check No.20Refer to P.108CautionBe sure

Troubleshooting SiBE04113492 Service Diagnosis4.20 DC Voltage / Current Sensor AbnormalityRemote Controller DisplayH8Method of Malfunction DetectionDC

SiBE041134 TroubleshootingService Diagnosis 934.21 Thermistor or Related Abnormality (Outdoor Unit)Remote Controller Display H9, J3, J6, P4Method of M

Troubleshooting SiBE04113494 Service DiagnosisTroubleshooting In case of “H9” “J3” “J6”Check No.01Refer to P.101H9 : Outdoor temperature thermistorJ3

SiBE041134 TroubleshootingService Diagnosis 954.22 Electrical Box Temperature RiseRemote Controller DisplayL3Method of Malfunction DetectionAn electri

Troubleshooting SiBE04113496 Service DiagnosisTroubleshootingCheck No.17Refer to P.107Check No.19Refer to P.108CautionWARNINGTo cool the electrical co

SiBE041134 TroubleshootingService Diagnosis 974.23 Radiation Fin Temperature RiseRemote Controller DisplayL4Method of Malfunction DetectionA radiation

Troubleshooting SiBE04113498 Service DiagnosisTroubleshootingCheck No.17Refer to P.107Check No.19Refer to P.108Note: Refer to “Application of silicon

SiBE041134 TroubleshootingService Diagnosis 994.24 Output Overcurrent DetectionRemote Controller DisplayL5Method of Malfunction DetectionAn output ove

SiBE041134List of Functions 1Part 1List of Functions1. Functions...

Troubleshooting SiBE041134100 Service DiagnosisTroubleshootingCheck No.15Refer to P.105Check No.17Refer to P.107Check No.18Refer to P.107Check No.22Re

SiBE041134 CheckService Diagnosis 1015. Check5.1 Thermistor Resistance CheckCheck No.01 Disconnect the connectors of the thermistors from the PCB, and

Check SiBE041134102 Service Diagnosis5.2 Fan Motor Connector Output CheckCheck No.03  Fan motor wire breakdown / short circuit check1. Check the conn

SiBE041134 CheckService Diagnosis 1035.4 Electronic Expansion Valve CheckCheck No.12 Conduct the followings to check the electronic expansion valve (E

Check SiBE041134104 Service Diagnosis5.5 Four Way Valve Performance CheckCheck No.135.6 Inverter Units Refrigerant System CheckCheck No.14(R15737)NOYE

SiBE041134 CheckService Diagnosis 1055.7 “Inverter Checker” CheckCheck No.15  CharacteristicsIf an abnormal stop occurs due to compressor startup fai

Check SiBE041134106 Service Diagnosis Diagnose method (Diagnose according to 6 LEDs lighting status.)(1) If all the LEDs are lit uniformly, the compr

SiBE041134 CheckService Diagnosis 1075.9 Installation Condition CheckCheck No.175.10 Discharge Pressure CheckCheck No.18Installation condition checkNo

Check SiBE041134108 Service Diagnosis5.11 Outdoor Fan System CheckCheck No.19 DC motor5.12 Main Circuit Short CheckCheck No.20Note: Check to make sure

SiBE041134 CheckService Diagnosis 1095.13 Power Module CheckCheck No.22Note: Check to make sure that the voltage between (+) and (–) of the power modu

Functions SiBE0411342 List of Functions1. FunctionsCategory FunctionsFTXS20/25K2V1BRXS20/25K2V1BCategory FunctionsFTXS20/25K2V1BRXS20/25K2V1BBasic Fun

SiBE041134110 Removal ProcedurePart 7Removal Procedure1. Indoor Unit...

SiBE041134 Indoor UnitRemoval Procedure 1111. Indoor Unit1.1 Removal of Air FiltersProcedure Warning Be sure to wait for 10 minutes or more after turn

Indoor Unit SiBE041134112 Removal Procedure3Pull out the air filter downward and remove it.3. Remove the Titanium apatite photocatalytic air-purifying

SiBE041134 Indoor UnitRemoval Procedure 1131.2 Removal of Horizontal BladeProcedure Warning Be sure to wait for 10 minutes or more after turning off a

Indoor Unit SiBE041134114 Removal Procedure5Remove the horizontal blade.Step Procedure Points(R16663)

SiBE041134 Indoor UnitRemoval Procedure 1151.3 Removal of Front PanelProcedure Warning Be sure to wait for 10 minutes or more after turning off all po

Indoor Unit SiBE041134116 Removal Procedure1.4 Removal of Front GrilleProcedure Warning Be sure to wait for 10 minutes or more after turning off all p

SiBE041134 Indoor UnitRemoval Procedure 1171.5 Removal of Vertical Blade ASSYsProcedure Warning Be sure to wait for 10 minutes or more after turning o

Indoor Unit SiBE041134118 Removal Procedure4Unfasten the 3 hooks at the shaft mounting part by pressing them with a flat screwdriver.5Remove the verti

SiBE041134 Indoor UnitRemoval Procedure 1191.6 Removal of Electrical BoxProcedure Warning Be sure to wait for 10 minutes or more after turning off all

SiBE041134Specifications 3Part 2Specifications1. Specifications ...

Indoor Unit SiBE041134120 Removal Procedure4Remove the screw of the wire retaining plate.5Remove the screws of the terminal board and disconnect the c

SiBE041134 Indoor UnitRemoval Procedure 1212Disconnect the connector for the fan motor [S200].Release the fan motor harnesses from the hook.3Remove th

Indoor Unit SiBE041134122 Removal Procedure1.7 Removal of Swing Motor / PCBsProcedure Warning Be sure to wait for 10 minutes or more after turning off

SiBE041134 Indoor UnitRemoval Procedure 1232Unfasten the hook, and disconnect the connector. The connector of the swing motor has a hook.Press the ho

Indoor Unit SiBE041134124 Removal Procedure4Disconnect the connector [S36] from the INTELLIGENT EYE sensor PCB.5Turn over the display PCB ASSY, and un

SiBE041134 Indoor UnitRemoval Procedure 1254. Remove the control PCB.1Lift the shield plate (1) and unfasten the 2 hooks.2Slide the shield plate (1) a

Indoor Unit SiBE041134126 Removal Procedure5Release the 4 hooks.Lift up the upper part of the control PCB and remove it.6The figure shows the control

SiBE041134 Indoor UnitRemoval Procedure 1271.8 Removal of Indoor Heat ExchangerProcedure Warning Be sure to wait for 10 minutes or more after turning

Indoor Unit SiBE041134128 Removal Procedure5Disconnect the flare nut for liquid piping.2. Remove the indoor heat exchanger.1Remove the indoor unit fro

SiBE041134 Indoor UnitRemoval Procedure 1293Widen the auxiliary piping to the extent of 10° ~ 20°. 4Remove the screw on the left side and unfasten the

Specifications SiBE0411344 Specifications1. Specifications50 Hz, 220 - 230 - 240 VNote: The data are based on the conditions shown in the table below

Indoor Unit SiBE041134130 Removal Procedure1.9 Removal of Fan Rotor / Fan MotorProcedure Warning Be sure to wait for 10 minutes or more after turning

SiBE041134 Indoor UnitRemoval Procedure 1312. Remove the fan rotor and the fan motor.1The fan motor has 3 projections on the right side.The fan rotor

Indoor Unit SiBE041134132 Removal Procedure5Unfasten the 2 hooks of the motor cover.6Pull out the fan motor from the fan rotor to remove. The magnet

SiBE041134 Indoor UnitRemoval Procedure 1331.10 Exchange of Piping Direction (Drain Hose)Procedure Warning Be sure to wait for 10 minutes or more afte

Outdoor Unit SiBE041134134 Removal Procedure2. Outdoor Unit 2.1 Removal of Outer Panels / Fan MotorProcedure Warning Be sure to wait for 10 minutes or

SiBE041134 Outdoor UnitRemoval Procedure 1352Remove the 2 screws and lift the top panel.3Remove the drip proof plate.4Remove the 4 screws and remove t

Outdoor Unit SiBE041134136 Removal Procedure5Remove the 8 screws of the front panel.6Unfasten the hooks.Pull and remove the front panel. The front pa

SiBE041134 Outdoor UnitRemoval Procedure 1373. Remove the fan motor.  Nut size: M61Remove the nut of the outdoor fan.2Remove the outdoor fan. When r

Outdoor Unit SiBE041134138 Removal Procedure4Disconnect the connector for the fan motor [S70].5Release the fan motor lead wire from the hook.StepProce

SiBE041134 Outdoor UnitRemoval Procedure 1396Remove the screw and remove the fan motor fixing frame. When reassembling, fit the lower hooks into the

SiBE041134Printed Circuit Board Connector Wiring Diagram 5Part 3Printed Circuit BoardConnector Wiring Diagram1. Indoor Unit...

Outdoor Unit SiBE041134140 Removal Procedure7Open the hooks and release the fan motor lead wire. When reassembling, put the fan motor lead wire throu

SiBE041134 Outdoor UnitRemoval Procedure 1412Remove the 4 screws on the right side panel.3Remove the screw near the stop valves.4Unfasten the hook on

Outdoor Unit SiBE041134142 Removal Procedure5Lift up the right side panel and remove it. When reassembling, make sure to fit the hook.6Lift up the gu

SiBE041134 Outdoor UnitRemoval Procedure 1432.2 Removal of Electrical BoxProcedure Warning Be sure to wait for 10 minutes or more after turning off al

Outdoor Unit SiBE041134144 Removal Procedure4Disconnect the relay connector for the compressor.5Disconnect the connector for the electronic expansion

SiBE041134 Outdoor UnitRemoval Procedure 1458Release the discharge pipe thermistor. Be careful not to lose the clip for the thermistor.9Lift and remo

Outdoor Unit SiBE041134146 Removal Procedure2.3 Removal of PCBsProcedure Warning Be sure to wait for 10 minutes or more after turning off all power su

SiBE041134 Outdoor UnitRemoval Procedure 1474Pull out the forced operation button PCB.Disconnect the connector [S110] and remove the forced operation

Outdoor Unit SiBE041134148 Removal Procedure7Release the harness.8Cut the clamps at the 2 locations.9Disconnect the connector for the filter PCB [S10]

SiBE041134 Outdoor UnitRemoval Procedure 14910Disconnect the connectors for the magnetic relay [S50] and for the forced operation button PCB [S100].11

Indoor Unit SiBE0411346 Printed Circuit Board Connector Wiring Diagram1. Indoor UnitConnectors and Other PartsPCB(1): Control PCBPCB (2): Display PCBP

Outdoor Unit SiBE041134150 Removal Procedure14Remove the 6 screws.15Unfasten the 4 hooks and remove the main PCB.  Refer to page 9 for detail.[S10] [

SiBE041134 Outdoor UnitRemoval Procedure 1512. Remove the filter PCB.1Release the harnesses from the hook.2Cut the clamp.3Release the harnesses from t

Outdoor Unit SiBE041134152 Removal Procedure4Release the harnesses from the hooks.5Remove the screw.6Unfasten the 2 hooks.7Lift and pull out the filte

SiBE041134 Outdoor UnitRemoval Procedure 1538Feature of the filter PCB Refer to page 9 for detail.StepProcedure Points(R11878)

Outdoor Unit SiBE041134154 Removal Procedure2.4 Removal of Reactor / Partition PlateProcedure Warning Be sure to wait for 10 minutes or more after tur

SiBE041134 Outdoor UnitRemoval Procedure 1552The partition plate has a hook on the lower side. Lift and pull the partition plate to remove. When reas

Outdoor Unit SiBE041134156 Removal Procedure2.5 Removal of Sound BlanketsProcedure Warning Be sure to wait for 10 minutes or more after turning off al

SiBE041134 Outdoor UnitRemoval Procedure 1574Pull the sound blanket (inner) out.5Pull the sound blanket (bottom) out.StepProcedure Points(R11887)Sound

Outdoor Unit SiBE041134158 Removal Procedure2.6 Removal of Four Way ValveProcedure Warning Be sure to wait for 10 minutes or more after turning off al

SiBE041134 Outdoor UnitRemoval Procedure 1594Remove the screw and remove the four way valve coil. WarningBe careful not to get yourself burnt with the

SiBE041134 Indoor UnitPrinted Circuit Board Connector Wiring Diagram 7PCB Detail PCB(1): Control PCBPCB(3): INTELLIGENT EYE Sensor PCBPCB(2): Display

Outdoor Unit SiBE041134160 Removal ProcedureNote: Do not use a metal saw for cutting pipes by all means because the sawdust comes into the circuit.

SiBE041134 Outdoor UnitRemoval Procedure 1612.7 Removal of CompressorProcedure Warning Be sure to wait for 10 minutes or more after turning off all po

Outdoor Unit SiBE041134162 Removal ProcedureStepProcedure Points3Heat up the brazed part of the suction side and disconnect.Note:  Do not use a metal

SiBE041134Trial Operation and Field Settings 163Part 8Trial Operation andField Settings1. Pump Down Operation...

Pump Down Operation SiBE041134164 Trial Operation and Field Settings1. Pump Down OperationOutline In order to protect the environment, be sure to cond

SiBE041134 Forced Cooling OperationTrial Operation and Field Settings 1652. Forced Cooling OperationIndoor UnitOutdoor UnitItem Forced CoolingConditio

Trial Operation SiBE041134166 Trial Operation and Field Settings3. Trial OperationOutline 1. Measure the supply voltage and make sure that it falls wi

SiBE041134 Field SettingsTrial Operation and Field Settings 1674. Field Settings4.1 Model Type SettingARC466A6 This remote controller is common to th

Field Settings SiBE041134168 Trial Operation and Field Settings4.3 Standby Electricity SavingOutline This function turns OFF the power supply to the o

SiBE041134 Field SettingsTrial Operation and Field Settings 1694.5 Jumper SettingsFor the location of the jumper, refer to page 7, 9.Jumper Function W

Outdoor Unit SiBE0411348 Printed Circuit Board Connector Wiring Diagram2. Outdoor UnitConnectors and Other PartsPCB (1): Filter PCBPCB (2): Main PCBPC

Application of Silicon Grease to a Power Transistor and a Diode Bridge SiBE041134170 Trial Operation and Field Settings5. Application of Silicon Greas

SiBE041134Appendix 171Part 9Appendix1. Piping Diagrams...1721.1 Indoor

Piping Diagrams SiBE041134172 Appendix1. Piping Diagrams1.1 Indoor UnitFTXS20/25K2V1B1.2 Outdoor UnitRXS20/25K2V1BREFRIGERANT FLOWHEAT EXCHANGERFIELD

SiBE041134 Wiring DiagramsAppendix 1732. Wiring Diagrams2.1 Indoor UnitFTXS20/25K2V1B2.2 Outdoor UnitRXS20/25K2V1BPCB 2PCB 1S26S27S27S27FIELD WIRING.B

Head Office:Umeda Center Bldg., 2-4-12, Nakazaki-Nishi,Kita-ku, Osaka, 530-8323 JapanTokyo Office:JR Shinagawa East Bldg., 2-18-1, Konan,Minato-ku, To

SiBE041134 Outdoor UnitPrinted Circuit Board Connector Wiring Diagram 9PCB Detail PCB (1): Filter PCBPCB (2): Main PCBPCB (3): Forced Operation Button

SiBE041134i Table of ContentsInverter PairWall Mounted TypeK-SerieszHeat PumpIndoor UnitFTXS20K2V1BFTXS25K2V1BOutdoor UnitRXS20K2V1BRXS25K2V1B

SiBE04113410 Function and ControlPart 4Function and Control1. Main Functions...

SiBE041134 Main FunctionsFunction and Control 111. Main Functions1.1 Temperature ControlDefinitions of TemperaturesThe definitions of temperatures are

Main Functions SiBE04113412 Function and ControlDrawing of InverterThe following drawing shows a schematic view of the inverter principle:Inverter Fea

SiBE041134 Main FunctionsFunction and Control 131.3 Airflow Direction ControlPower-Airflow Dual FlapThe large flap sends a large volume of air downwar

Main Functions SiBE04113414 Function and Control1.4 Fan Speed Control for Indoor UnitOutline Phase control and fan speed control contains 9 steps: LLL

SiBE041134 Main FunctionsFunction and Control 151.5 Program Dry OperationOutline Program dry operation removes humidity while preventing the room temp

Main Functions SiBE04113416 Function and Control1.6 Automatic OperationOutline Automatic Cooling / Heating FunctionWhen the automatic operation is sel

SiBE041134 Main FunctionsFunction and Control 171.7 Thermostat ControlThermostat control is based on the difference between the room thermistor temper

Main Functions SiBE04113418 Function and Control1.8 NIGHT SET ModeOutline When the OFF TIMER is set, the NIGHT SET Mode is automatically activated. Th

SiBE041134 Main FunctionsFunction and Control 191.9 ECONO OperationOutline ECONO operation reduces the maximum operating current and the power consump

SiBE041134Table of Contents ii1. Introduction ...v1.1 Safety

Main Functions SiBE04113420 Function and Control1.10 INTELLIGENT EYE OperationOutline This function detects the existence of humans in the room with a

SiBE041134 Main FunctionsFunction and Control 211.11 Inverter POWERFUL OperationOutline In order to exploit the cooling and heating capacity to full e

Main Functions SiBE04113422 Function and Control1.12 Other Functions1.12.1 Hot-Start FunctionIn order to prevent the cold air blast that normally come

SiBE041134 Function of ThermistorFunction and Control 232. Function of Thermistor(1) Outdoor Heat Exchanger Thermistor 1. The outdoor heat exchanger

Control Specification SiBE04113424 Function and Control3. Control Specification3.1 Mode HierarchyOutline There are 3 modes; normal operation mode, for

SiBE041134 Control SpecificationFunction and Control 253.2 Frequency ControlOutline Frequency is determined according to the difference between the ro

Control Specification SiBE04113426 Function and ControlIndoor Frequency Command (∆D signal)The difference between the room thermistor temperature and

SiBE041134 Control SpecificationFunction and Control 273.3 Controls at Mode Changing / Start-up3.3.1 Preheating OperationOutline The inverter operatio

Control Specification SiBE04113428 Function and Control3.3.5 Compressor Protection FunctionWhen turning the compressor from OFF to ON, the upper limit

SiBE041134 Control SpecificationFunction and Control 293.5 Input Current ControlOutline The microcomputer calculates the input current while the compr

SiBE041134iii Table of Contents2.3 Adjusting the Airflow Direction and Rate ...432.4 COMFORT AIRFLOW Oper

Control Specification SiBE04113430 Function and Control3.6 Freeze-up Protection ControlOutline During cooling operation, the signal sent from the indo

SiBE041134 Control SpecificationFunction and Control 313.8 Outdoor Fan Control1. Fan ON control to cool down the electrical boxThe outdoor fan is turn

Control Specification SiBE04113432 Function and Control3.10 Defrost ControlOutline Defrosting is carried out by the cooling cycle (reverse cycle). The

SiBE041134 Control SpecificationFunction and Control 333.11 Electronic Expansion Valve ControlOutline The following items are included in the electron

Control Specification SiBE04113434 Function and Control3.11.1 Fully Closing with Power ONThe electronic expansion valve is initialized when turning on

SiBE041134 Control SpecificationFunction and Control 353.11.7 Control for Disconnection of the Discharge Pipe ThermistorOutline The disconnection of t

Control Specification SiBE04113436 Function and Control3.12 Malfunctions3.12.1 Sensor Malfunction DetectionSensor malfunction may occur in the thermis

SiBE041134Operation Manual 37Part 5Operation Manual1. System Configuration...

System Configuration SiBE04113438 Operation Manual1. System ConfigurationAfter installation and trial operation of the room air conditioner are comple

SiBE041134 Operation ManualOperation Manual 392. Operation Manual2.1 Remote ControllerName of PartsRemote ControllerSignal transmitterFAN setting butt

SiBE041134Table of Contents iv5.10 Discharge Pressure Check...1075.11 Outdoor Fan Syst

Operation Manual SiBE04113440 Operation ManualQUIET button• OUTDOOR UNIT QUIET operation.MODE selector button• It selects the operation mode. (AUTO/

SiBE041134 Operation ManualOperation Manual 412.2 AUTO · DRY · COOL · HEAT · FAN OperationAUTO · DRY · COOL · HEAT · FAN OperationThe air conditioner

Operation Manual SiBE04113442 Operation Manual To change the temperature settingPress .• The displayed items on the LCD will change whenever eit

SiBE041134 Operation ManualOperation Manual 432.3 Adjusting the Airflow Direction and RateAdjusting the Airflow Direction and RateYou can adjust the a

Operation Manual SiBE04113444 Operation ManualPress .Upper limitUpper limit45˚5˚0˚15˚45˚50˚0˚45˚5˚0˚ To adjust the airflow rate settingAutoIndo

SiBE041134 Operation ManualOperation Manual 452.4 COMFORT AIRFLOW OperationCOMFORT AIRFLOW OperationThe flow of air will be in the upward direction wh

Operation Manual SiBE04113446 Operation Manual2.5 INTELLIGENT EYE OperationINTELLIGENT EYE Operation To start INTELLIGENT EYE operation To cancel IN

SiBE041134 Operation ManualOperation Manual 47INTELLIGENT EYE Operation90˚55˚7m55˚7m[Example] Normal operationWhen no one is in the room Back to nor

Operation Manual SiBE04113448 Operation Manual2.6 POWERFUL OperationPOWERFUL OperationPOWERFUL operation quickly maximizes the cooling (heating) effec

SiBE041134 Operation ManualOperation Manual 492.7 OUTDOOR UNIT QUIET OperationOUTDOOR UNIT QUIET OperationOUTDOOR UNIT QUIET operation lowers the nois

Introduction SiBE041134v1. Introduction1.1 Safety CautionsCautions and Warnings Be sure to read the following safety cautions before conducting repai

Operation Manual SiBE04113450 Operation Manual2.8 ECONO OperationECONO Operation[Example]Normal operationECONO operationTimeECONO operation is a funct

SiBE041134 Operation ManualOperation Manual 512.9 OFF TIMER OperationOFF TIMER OperationTimer functions are useful for automatically switching the air

Operation Manual SiBE04113452 Operation Manual2.10 ON TIMER OperationON TIMER Operation To use ON TIMER operation To cancel ON TIMER operation To c

SiBE041134 Operation ManualOperation Manual 532.11 WEEKLY TIMER OperationWEEKLY TIMER OperationUp to 4 timer settings can be saved for each day of the

Operation Manual SiBE04113454 Operation Manual• The day of the week and reservation number will be set.• “ ” and “ ” blink. To use

SiBE041134 Operation ManualOperation Manual 55WEEKLY TIMER Operation6. Press to select the desired time.7. Press .9. Press .

Operation Manual SiBE04113456 Operation Manual[Monday][Tuesday] to [Friday]Copy mode• A reservation made once can be copied to another day of the week

SiBE041134 Operation ManualOperation Manual 57WEEKLY TIMER Operation Confirming a reservation To deactivate WEEKLY TIMER operation• The reservation

Operation Manual SiBE04113458 Operation Manual To delete reservationsThe individual reservationThe reservations for each day of the week1. Press

SiBE041134Service Diagnosis 59Part 6Service Diagnosis1. Troubleshooting with LED ...

SiBE041134 IntroductionviBe sure to wear a safety helmet, gloves, and a safety belt when working at a high place (more than 2 m). Insufficient safety

Troubleshooting with LED SiBE04113460 Service Diagnosis1. Troubleshooting with LED1.1 Indoor UnitOperation Lamp The operation lamp blinks when any of

SiBE041134 Problem Symptoms and MeasuresService Diagnosis 612. Problem Symptoms and MeasuresSymptom Check Item Details of MeasureReferencePageThe unit

Service Check Function SiBE04113462 Service Diagnosis3. Service Check FunctionCheck Method 1 1. When the timer cancel button is held down for 5 second

SiBE041134 Service Check FunctionService Diagnosis 63Check Method 21. Press the center of the [Temp] button and the [Mode] button at the same time.5C

Service Check Function SiBE04113464 Service Diagnosis5. Diagnose by the sound.beep : The left-side number does not correspond with the error code.tw

SiBE041134 TroubleshootingService Diagnosis 654. Troubleshooting4.1 Error Codes and Description: Displayed only when system-down occurs.Error Codes D

Troubleshooting SiBE04113466 Service Diagnosis4.2 Indoor Unit PCB AbnormalityRemote Controller DisplayA1Method of Malfunction DetectionThe system chec

SiBE041134 TroubleshootingService Diagnosis 67TroubleshootingNote: Check the following connector.Check the combination of the indoor and outdoor unit.

Troubleshooting SiBE04113468 Service Diagnosis4.3 Freeze-up Protection Control or Heating Peak-cut ControlRemote Controller DisplayA5Method of Malfunc

SiBE041134 TroubleshootingService Diagnosis 69TroubleshootingCheck No.01Refer to P.101NONONOCheck No. 06Check the indoor heat exchanger thermistor.YES

Introduction SiBE041134vii1.1.2 Cautions Regarding Safety of UsersWarningBe sure to use parts listed in the service parts list of the applicable model

Troubleshooting SiBE04113470 Service Diagnosis4.4 Fan Motor (DC Motor) or Related AbnormalityRemote Controller DisplayA6Method of Malfunction Detectio

SiBE041134 TroubleshootingService Diagnosis 71TroubleshootingCheck No.03Refer to P.102(R16048)Turn off the power.(Unplug the power cable or turn the b

Troubleshooting SiBE04113472 Service Diagnosis4.5 Thermistor or Related Abnormality (Indoor Unit)Remote Controller DisplayC4, C9 Method of Malfunctio

SiBE041134 TroubleshootingService Diagnosis 734.6 Refrigerant ShortageRemote Controller DisplayU0Method of Malfunction DetectionRefrigerant shortage d

Troubleshooting SiBE04113474 Service DiagnosisTroubleshootingCheck No.01Refer to P.101Check No.12Refer to P.103(R16015)CautionYESNGNONOYESYESYESNOYESN

SiBE041134 TroubleshootingService Diagnosis 754.7 Low-voltage Detection or Over-voltage DetectionRemote Controller DisplayU2Method of Malfunction Dete

Troubleshooting SiBE04113476 Service DiagnosisTroubleshootingCorrect the power supply.Replace the outdoor unit PCB.Check for such factors for a long t

SiBE041134 TroubleshootingService Diagnosis 774.8 Signal Transmission Error (between Indoor Unit and Outdoor Unit)Remote Controller DisplayU4Method of

Troubleshooting SiBE04113478 Service DiagnosisTroubleshootingCheck No.11Refer to P.102Check No.11Check the power supply waveform.Check the voltage of

SiBE041134 TroubleshootingService Diagnosis 794.9 Unspecified Voltage (between Indoor Unit and Outdoor Unit)Remote Controller Display UAMethod of Malf

SiBE041134 IntroductionviiiCheck to make sure that the power cable plug is not dirty or loose, then insert the plug into a power outlet securely.If th

Troubleshooting SiBE04113480 Service Diagnosis4.10 Outdoor Unit PCB AbnormalityRemote Controller Display E1Method of Malfunction Detection The system

SiBE041134 TroubleshootingService Diagnosis 814.11 OL Activation (Compressor Overload)Remote Controller DisplayE5Method of Malfunction DetectionA comp

Troubleshooting SiBE04113482 Service Diagnosis4.12 Compressor LockRemote Controller DisplayE6Method of Malfunction DetectionA compressor lock is detec

SiBE041134 TroubleshootingService Diagnosis 834.13 DC Fan LockRemote Controller DisplayE7Method of Malfunction DetectionAn error is determined with th

Troubleshooting SiBE04113484 Service Diagnosis4.14 Input Overcurrent DetectionRemote Controller DisplayE8Method of Malfunction DetectionAn input overc

SiBE041134 TroubleshootingService Diagnosis 854.15 Four Way Valve AbnormalityRemote Controller DisplayEAMethod of Malfunction DetectionThe room temper

Troubleshooting SiBE04113486 Service DiagnosisTroubleshootingCheck No.01Refer to P.101Check No.13Refer to P.104Check No.14Refer to P.104NGOKNOOKNGOKYE

SiBE041134 TroubleshootingService Diagnosis 874.16 Discharge Pipe Temperature ControlRemote Controller DisplayF3Method of Malfunction DetectionAn erro

Troubleshooting SiBE04113488 Service Diagnosis4.17 High Pressure Control in CoolingRemote Controller DisplayF6Method of Malfunction DetectionHigh-pres

SiBE041134 TroubleshootingService Diagnosis 894.18 Compressor System Sensor AbnormalityRemote Controller Display H0Method of Malfunction Detection Th