Daikin FTXN35KEV1B Service Manual

Service ManualInverter PairWall Mounted Type K-SeriesSiBE041102_A[Applied Models]O Inverter Pair : Heat Pump

Introduction SiBE041102_Aix1.2 Used IconsIcons are used to attract the attention of the reader to specific information. The meaning of each icon is de

Check SiBE041102_A90 Service Diagnosis5.5 Four Way Valve Performance CheckCheck No.135.6 Inverter Unit Refrigerant System CheckCheck No.14(R11903)NOYE

SiBE041102_A CheckService Diagnosis 915.7 “Inverter Checker” CheckCheck No.15CharacteristicsIf an abnormal stop occurs due to compressor startup fail

Check SiBE041102_A92 Service DiagnosisDiagnose method (Diagnose according to 6 LEDs lighting status.)(1) When all the LEDs are lit uniformly, the com

SiBE041102_A CheckService Diagnosis 935.9 Discharge Pressure CheckCheck No.185.10 Outdoor Fan System CheckCheck No.19 AC motor(R11718)Not dirtyYESYESD

Check SiBE041102_A94 Service Diagnosis5.11 Main Circuit Short CheckCheck No.20Note: Check to make sure that the voltage between (+) and (–) of the dio

SiBE041102_ARemoval Procedure 95Part 7Removal Procedure1. Indoor Unit...

Indoor Unit SiBE041102_A96 Removal Procedure1. Indoor Unit1.1 Removal of Air FiltersProcedure Warning Be sure to wait for 10 minutes or more after tur

SiBE041102_A Indoor UnitRemoval Procedure 973Pull out the air filter downward and remove it.3. Remove the Titanium apatite photocatalytic air-purifyin

Indoor Unit SiBE041102_A98 Removal Procedure1.2 Removal of Horizontal BladeProcedure Warning Be sure to wait for 10 minutes or more after turning off

SiBE041102_A Indoor UnitRemoval Procedure 995Remove the horizontal blade.Step Procedure Points(R11626)

SiBE041102_AList of Functions 1Part 1List of Functions1. Functions...

Indoor Unit SiBE041102_A100 Removal Procedure1.3 Removal of Front PanelProcedure Warning Be sure to wait for 10 minutes or more after turning off all

SiBE041102_A Indoor UnitRemoval Procedure 1011.4 Removal of Front GrilleProcedure Warning Be sure to wait for 10 minutes or more after turning off all

Indoor Unit SiBE041102_A102 Removal Procedure1.5 Removal of Electrical Box / Vertical BladesProcedure Warning Be sure to wait for 10 minutes or more a

SiBE041102_A Indoor UnitRemoval Procedure 1035Loosen the screws of the terminal board and disconnect the connecting wires.Connecting wiresblack (1) -

Indoor Unit SiBE041102_A104 Removal Procedure2Disconnect the connectors for the fan motor [S1] [S7].Release the fan motor harnesses from the hook.3Rem

SiBE041102_A Indoor UnitRemoval Procedure 1053. Remove the vertical blade ASSY.Narrow the edges of the hook to unfasten it.1Unfasten the right and le

Indoor Unit SiBE041102_A106 Removal Procedure4Unfasten the 3 hooks at the shaft mounting part by pressing them with a flat screwdriver.5Remove the ver

SiBE041102_A Indoor UnitRemoval Procedure 1071.6 Removal of Swing Motor / PCBsProcedure Warning Be sure to wait for 10 minutes or more after turning o

Indoor Unit SiBE041102_A108 Removal Procedure2Unfasten the hook, and disconnect the connector.The connector of the swing motor has a hook.Press the h

SiBE041102_A Indoor UnitRemoval Procedure 1093Disconnect the connector [S27] from the display PCB.4The figure shows the component parts of the display

Functions SiBE041102_A2 List of Functions1. FunctionsCategory FunctionsFTXN25/35KEV1BRXN25/35KEV1BCategory FunctionsFTXN25/35KEV1BRXN25/35KEV1BBasic F

Indoor Unit SiBE041102_A110 Removal Procedure4Disconnect the terminals from the terminal board with pliers.1 : black, upper2 : white, lower3 : red, up

SiBE041102_A Indoor UnitRemoval Procedure 1111.7 Removal of Indoor Heat ExchangerProcedure Warning Be sure to wait for 10 minutes or more after turnin

Indoor Unit SiBE041102_A112 Removal Procedure5Disconnect the flare nut for liquid piping with 2 wrenches.2. Remove the indoor heat exchanger.1Remove t

SiBE041102_A Indoor UnitRemoval Procedure 1133Widen the auxiliary piping to the extent of 10° ~ 20°. 4Remove the screw on the left side and unfasten t

Indoor Unit SiBE041102_A114 Removal Procedure1.8 Removal of Fan Rotor / Fan MotorProcedure Warning Be sure to wait for 10 minutes or more after turnin

SiBE041102_A Indoor UnitRemoval Procedure 1152. Remove the fan rotor and the fan motor.1The fan motor has 3 projections.The fan rotor has a rotating s

Indoor Unit SiBE041102_A116 Removal Procedure5Loosen the lock screw and remove the fan motor.When reassembling the fan rotor, provide as much as 5 mm

SiBE041102_A Indoor UnitRemoval Procedure 1171.9 Exchange of Drain Hose (Piping Direction)Procedure Warning Be sure to wait for 10 minutes or more aft

Outdoor Unit SiBE041102_A118 Removal Procedure2. Outdoor Unit2.1 Removal of Outer PanelsProcedure Warning Be sure to wait for 10 minutes or more after

SiBE041102_A Outdoor UnitRemoval Procedure 1192Remove the 3 screws (right: 1 screw, left: 2 screws) and remove the top panel.3Remove the 5 screws of t

SiBE041102_ASpecifications 3Part 2Specifications1. Specifications ...

Outdoor Unit SiBE041102_A120 Removal Procedure2.2 Removal of Outdoor Fan / Fan MotorProcedure Warning Be sure to wait for 10 minutes or more after tur

SiBE041102_A Outdoor UnitRemoval Procedure 1213Remove the screw and remove the fan motor fixing frame.When reassembling, put the fan motor lead wire

Outdoor Unit SiBE041102_A122 Removal Procedure2.3 Removal of Electrical Box / PCBProcedure Warning Be sure to wait for 10 minutes or more after turnin

SiBE041102_A Outdoor UnitRemoval Procedure 1235Remove the screw on the rear side of the right side panel.6Remove the 4 screws on the right side panel.

Outdoor Unit SiBE041102_A124 Removal Procedure9Unfasten the hook, and remove the right side panel.10Pull out the terminals from the terminal board exc

SiBE041102_A Outdoor UnitRemoval Procedure 12513Disconnect the connector [S20], [S40], [S90].[S20]: electronic expansion valve coil[S40]: overload pro

Outdoor Unit SiBE041102_A126 Removal Procedure17Release the harnesses of the relay connector and the reactor from the groove.18Release the lead wires

SiBE041102_A Outdoor UnitRemoval Procedure 12720Remove the 5 screws.21Unfasten the hook.22Remove the PCB.Refer to page 8 for detail.[S20]: electronic

Outdoor Unit SiBE041102_A128 Removal Procedure2. Remove the electrical box.1Remove the electrical box.3. Remove the reactor.1Remove the 4 screws and r

SiBE041102_A Outdoor UnitRemoval Procedure 1292Cut the clamp.When reassembling, clamp the outdoor heat exchanger thermistor and the harness of the el

Specifications SiBE041102_A4 Specifications1. Specifications50 Hz, 220 - 230 - 240 VNote: The data are based on the conditions shown in the table bel

Outdoor Unit SiBE041102_A130 Removal Procedure2.4 Removal of Sound BlanketsProcedure Warning Be sure to wait for 10 minutes or more after turning off

SiBE041102_A Outdoor UnitRemoval Procedure 1312. Remove the sound blankets.Since the piping ports on the sound blanket are torn easily, remove the bl

Outdoor Unit SiBE041102_A132 Removal Procedure2.5 Removal of Four Way ValveProcedure Warning Be sure to wait for 10 minutes or more after turning off

SiBE041102_A Outdoor UnitRemoval Procedure 1335Remove the protection bushing.6Remove the electronic expansion valve coil.7Remove the putty.StepProcedu

Outdoor Unit SiBE041102_A134 Removal ProcedureBefore working, make sure that the refrigerant gas is empty in the circuit.Be sure to apply nitrogen r

SiBE041102_A Outdoor UnitRemoval Procedure 1352.6 Removal of CompressorProcedure Warning Be sure to wait for 10 minutes or more after turning off all

SiBE041102_A136 Trial Operation and Field SettingsPart 8Trial Operation andField Settings1. Pump Down Operation...

SiBE041102_A Pump Down OperationTrial Operation and Field Settings 1371. Pump Down OperationOutline In order to protect the environment, be sure to co

Forced Cooling Operation SiBE041102_A138 Trial Operation and Field Settings2. Forced Cooling OperationIndoor UnitItem Forced CoolingConditions The for

SiBE041102_A Trial OperationTrial Operation and Field Settings 1393. Trial OperationOutline 1. Measure the power supply voltage and make sure that it

SiBE041102_APrinted Circuit Board Connector Wiring Diagram 5Part 3Printed Circuit BoardConnector Wiring Diagram1. Indoor Unit...

Field Settings SiBE041102_A140 Trial Operation and Field Settings4. Field Settings4.1 When 2 Units are Installed in 1 RoomWhen 2 indoor units are inst

SiBE041102_A Application of Silicon Grease to a Power Transistor and a Diode BridgeTrial Operation and Field Settings 1415. Application of Silicon Gre

SiBE041102_A142 AppendixPart 9Appendix1. Piping Diagrams...1431.1 Indoo

SiBE041102_A Piping DiagramsAppendix 1431. Piping Diagrams1.1 Indoor UnitFTXN25/35KEV1BINDOOR UNITHEAT EXCHANGER7.0CuT4.8CuT7.0CuT7.0CuT7.0CuTCROSS FL

Piping Diagrams SiBE041102_A144 Appendix1.2 Outdoor UnitRXN25KEV1BRXN35KEV1BOUTDOOR UNITHEAT EXCHANGER7.0CuT7.0CuT7.0CuT6.4CuT7.0CuT 6.4CuTM6.4CuTPROP

SiBE041102_A Wiring DiagramsAppendix 1452. Wiring Diagrams2.1 Indoor UnitFTXN25/35KEV1BPCB 2LED1 H1PFIELD WIRING.S26S27PCB 1LED2 H2P119V1TRX1MBLK2F1U

Wiring Diagrams SiBE041102_A146 Appendix2.2 Outdoor UnitRXN25/35KEV1BBLKHL1HN1WHTREDGRN/YLWGRNGRNBRNYLWWHTYLWORGBLUREDBLKGRYBLKBLKBLKBLKBLKBLKREDWHTBL

Revision HistoryMonth / Year Version Revised contents03/2011 SiBE041102 –06/2011 SiBE041102_A Review of contents

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

Indoor Unit SiBE041102_A6 Printed Circuit Board Connector Wiring Diagram1. Indoor UnitConnectors and Other PartsPCB (1): Control PCBPCB (2): Display P

SiBE041102_A Indoor UnitPrinted Circuit Board Connector Wiring Diagram 7PCB Detail PCB (1): Control PCBPCB (2): Display PCBLED_AJBJCJALED_AJBJCJAF1UH1

Outdoor Unit SiBE041102_A8 Printed Circuit Board Connector Wiring Diagram2. Outdoor UnitConnectors and Other PartsPCB Detail1) S20 Connector for elect

SiBE041102_AFunction and Control 9Part 4Function and Control1. Main Functions...

SiBE041102_Ai Table of ContentsInverter PairWall Mounted TypeK-SerieszHeat PumpIndoor UnitFTXN25KEV1BFTXN35KEV1BOutdoor UnitRXN25KEV1BRXN35KEV1B

Main Functions SiBE041102_A10 Function and Control1. Main Functions1.1 Temperature ControlDefinitions of TemperaturesThe definitions of temperatures a

SiBE041102_A Main FunctionsFunction and Control 11Drawing of InverterThe following drawing shows a schematic view of the inverter principle:Inverter F

Main Functions SiBE041102_A12 Function and Control1.3 Airflow Direction ControlPower-Airflow FlapThe large flap sends a large volume of air downwards

SiBE041102_A Main FunctionsFunction and Control 131.4 Fan Speed Control for Indoor UnitOutline Phase control and fan speed control contains 9 steps: L

Main Functions SiBE041102_A14 Function and Control1.5 Program Dry OperationOutline Program dry operation removes humidity while preventing the room te

SiBE041102_A Main FunctionsFunction and Control 151.6 Automatic OperationOutline Automatic Cooling / Heating FunctionWhen the AUTO mode is selected wi

Main Functions SiBE041102_A16 Function and Control1.7 Thermostat ControlThermostat control is based on the difference between the room thermistor temp

SiBE041102_A Main FunctionsFunction and Control 171.8 NIGHT SET ModeOutline When the OFF timer is set, the NIGHT SET Mode is automatically activated.

Main Functions SiBE041102_A18 Function and Control1.9 ECONO OperationThe "ECONO operation" reduces the maximum operating current and the pow

SiBE041102_A Main FunctionsFunction and Control 191.10 Inverter POWERFUL OperationOutline In order to exploit the cooling and heating capacity to full

SiBE041102_ATable of Contents ii1. Introduction ...v1.1 Safe

Main Functions SiBE041102_A20 Function and Control1.11 Other Functions1.11.1 Hot-Start FunctionIn order to prevent the cold air blast that normally co

SiBE041102_A Function of ThermistorFunction and Control 212. Function of Thermistor(1) Outdoor Heat Exchanger Thermistor 1. The outdoor heat exchang

Control Specification SiBE041102_A22 Function and Control3. Control Specification3.1 Mode HierarchyOutline There are two modes; the one is the normal

SiBE041102_A Control SpecificationFunction and Control 233.2 Frequency ControlOutline Frequency is determined according to the difference between the

Control Specification SiBE041102_A24 Function and ControlIndoor Frequency Command (∆D signal)The difference between the room thermistor temperature an

SiBE041102_A Control SpecificationFunction and Control 253.3 Controls at Mode Changing / Start-up3.3.1 Preheating OperationOutline The inverter operat

Control Specification SiBE041102_A26 Function and Control3.3.5 Compressor Protection FunctionWhen turning the compressor from OFF to ON, the upper lim

SiBE041102_A Control SpecificationFunction and Control 273.5 Input Current ControlOutline The microcomputer calculates the input current while the com

Control Specification SiBE041102_A28 Function and Control3.6 Freeze-up Protection ControlOutline During cooling operation, the signal sent from the in

SiBE041102_A Control SpecificationFunction and Control 293.8 Outdoor Fan Control1. Fan ON control to cool down the electrical boxThe outdoor fan is tu

SiBE041102_Aiii Table of Contents2.4 COMFORT AIRFLOW Operation ...422.5 POWERFUL Operation ...

Control Specification SiBE041102_A30 Function and Control3.10 Defrost ControlOutline Defrosting is carried out by the cooling cycle (reverse cycle). T

SiBE041102_A Control SpecificationFunction and Control 313.11 Electronic Expansion Valve ControlOutline The following items are included in the electr

Control Specification SiBE041102_A32 Function and Control3.11.1 Fully Closing with Power ONThe electronic expansion valve is initialized when turning

SiBE041102_A Control SpecificationFunction and Control 333.11.7 Control for Disconnection of the Discharge Pipe ThermistorOutline The disconnection of

Control Specification SiBE041102_A34 Function and Control3.12 Malfunctions3.12.1 Sensor Malfunction DetectionSensor malfunction may occur in the therm

SiBE041102_AOperation Manual 35Part 5Operation Manual1. System Configuration...

System Configuration SiBE041102_A36 Operation Manual1. System ConfigurationAfter installation and trial operation of the room air conditioner are comp

SiBE041102_A Operation ManualOperation Manual 372. Operation Manual2.1 Remote ControllerNames of PartsRemote Controller16213985114371210<ARC470A1&g

Operation Manual SiBE041102_A38 Operation Manual2.2 AUTO · DRY · COOL · HEAT · FAN OperationAUTO·DRY·COOL·HEAT·FAN OperationThe air conditioner operat

SiBE041102_A Operation ManualOperation Manual 39NOTEAUTO·DRY·COOL·HEAT·FAN OperationTo change the airflow rate setting5. Press .AUTO or COO

SiBE041102_ATable of Contents ivPart 7 Removal Procedure ... 951. Indoor Unit...

Operation Manual SiBE041102_A40 Operation Manual2.3 Adjusting the Airflow DirectionAdjusting the Airflow DirectionYou can adjust the airflow direction

SiBE041102_A Operation ManualOperation Manual 41 CAUTIONNOTE45˚5˚0˚Upper limitLower limitStop operation15˚45˚50˚0˚Upper limitLower limitStop operation

Operation Manual SiBE041102_A42 Operation Manual2.4 COMFORT AIRFLOW OperationNOTECOMFORT AIRFLOW OperationThe flow of air will be in the upward direct

SiBE041102_A Operation ManualOperation Manual 432.5 POWERFUL OperationNOTEPOWERFUL OperationPOWERFUL operation quickly maximises the cooling (heating)

Operation Manual SiBE041102_A44 Operation Manual2.6 ECONO OperationNOTEECONO OperationECONO operation is a function which enables efficient operation

SiBE041102_A Operation ManualOperation Manual 452.7 OFF TIMER OperationOFF TIMER OperationNOTETimer functions are useful for automatically switching

Operation Manual SiBE041102_A46 Operation Manual2.8 ON TIMER OperationON TIMER OperationDisplayNOTETo use ON TIMER operationTo cancel ON TIMER operati

SiBE041102_AService Diagnosis 47Part 6Service Diagnosis1. Troubleshooting with LED ...

Troubleshooting with LED SiBE041102_A48 Service Diagnosis1. Troubleshooting with LED1.1 Indoor UnitOperation Lamp The operation lamp blinks when any o

SiBE041102_A Problem Symptoms and MeasuresService Diagnosis 492. Problem Symptoms and MeasuresSymptom Check Item Details of Measure ReferencePageThe u

Introduction SiBE041102_Av1. Introduction1.1 Safety CautionsCautions and WarningsBe sure to read the following safety cautions before conducting repa

Service Check Function SiBE041102_A50 Service Diagnosis3. Service Check FunctionCheck Method 1 1. When the timer cancel button is held down for 5 seco

SiBE041102_A Service Check FunctionService Diagnosis 51Check Method 21. Press the center of the [TEMP] button and the [MODE] button at the same time t

Service Check Function SiBE041102_A52 Service Diagnosis5. Press the [TEMP] or button and change the number until you hear the long beep.6. Diagnos

SiBE041102_A TroubleshootingService Diagnosis 534. Troubleshooting4.1 Error Codes and Description: Displayed only when system-down occurs.Error Codes

Troubleshooting SiBE041102_A54 Service Diagnosis4.2 Indoor Unit PCB AbnormalityRemote Controller DisplayA1Method of Malfunction DetectionThe system ch

SiBE041102_A TroubleshootingService Diagnosis 554.3 Freeze-up Protection Control or Heating Peak-cut ControlRemote Controller DisplayA5Method of Malfu

Troubleshooting SiBE041102_A56 Service DiagnosisTroubleshootingCheck No.01Refer to P.87NONONOCheck No. 01Check the indoor heat exchanger thermistor.YE

SiBE041102_A TroubleshootingService Diagnosis 574.4 Fan Motor (AC Motor) or Related AbnormalityRemote Controller DisplayA6Method of Malfunction Detect

Troubleshooting SiBE041102_A58 Service DiagnosisTroubleshootingCheck No.04Refer to P.88NONONOCheck No. 04Check Hall ICNONONOYESYESYESYESYESYES(R15197)

SiBE041102_A TroubleshootingService Diagnosis 594.5 Thermistor or Related Abnormality (Indoor Unit)Remote Controller DisplayC4, C9 Method of Malfunct

SiBE041102_A IntroductionviBe sure to wear a safety helmet, gloves, and a safety belt when working at a high place (more than 2 m). Insufficient safet

Troubleshooting SiBE041102_A60 Service Diagnosis4.6 Signal Transmission Error (between Indoor Unit and Outdoor Unit)Remote Controller DisplayU4Method

SiBE041102_A TroubleshootingService Diagnosis 61TroubleshootingCheck No.11Refer to P.88Check No.11Check the power supply waveform.Check the voltage of

Troubleshooting SiBE041102_A62 Service Diagnosis4.7 Unspecified Voltage (between Indoor Unit and Outdoor Unit)Remote Controller Display UAMethod of Ma

SiBE041102_A TroubleshootingService Diagnosis 634.8 Outdoor Unit PCB AbnormalityRemote Controller DisplayE1Method of Malfunction DetectionThe system

Troubleshooting SiBE041102_A64 Service Diagnosis4.9 OL Activation (Compressor Overload)Remote Controller DisplayE5Method of Malfunction DetectionA com

SiBE041102_A TroubleshootingService Diagnosis 654.10 Compressor LockRemote Controller DisplayE6Method of Malfunction DetectionA compressor lock is det

Troubleshooting SiBE041102_A66 Service Diagnosis4.11 Input Overcurrent DetectionRemote Controller DisplayE8Method of Malfunction DetectionAn input ove

SiBE041102_A TroubleshootingService Diagnosis 674.12 Four Way Valve AbnormalityRemote Controller DisplayEAMethod of Malfunction DetectionThe room temp

Troubleshooting SiBE041102_A68 Service DiagnosisTroubleshootingCheck No.01Refer to P.87Check No.13Refer to P.90Check No.14Refer to P.90NGOKNOOKNGOKYES

SiBE041102_A TroubleshootingService Diagnosis 694.13 Discharge Pipe Temperature ControlRemote Controller DisplayF3Method of Malfunction DetectionAn er

Introduction SiBE041102_Avii1.1.2 Cautions Regarding Safety of UsersWarningBe sure to use parts listed in the service parts list of the applicable mod

Troubleshooting SiBE041102_A70 Service Diagnosis4.14 High Pressure Control in CoolingRemote Controller DisplayF6Method of Malfunction DetectionHigh-pr

SiBE041102_A TroubleshootingService Diagnosis 714.15 Compressor System Sensor AbnormalityRemote Controller DisplayH0Method of Malfunction DetectionTh

Troubleshooting SiBE041102_A72 Service Diagnosis4.16 Position Sensor AbnormalityRemote Controller DisplayH6Method of Malfunction DetectionA compressor

SiBE041102_A TroubleshootingService Diagnosis 73TroubleshootingCheck No.15Refer to P.91Check No.18Refer to P.93Check No.20Refer to P.94CautionBe sure

Troubleshooting SiBE041102_A74 Service Diagnosis4.17 DC Voltage / Current Sensor AbnormalityRemote Controller DisplayH8Method of Malfunction Detection

SiBE041102_A TroubleshootingService Diagnosis 754.18 Thermistor or Related Abnormality (Outdoor Unit)Remote Controller DisplayH9, J3, J6, P4Method of

Troubleshooting SiBE041102_A76 Service DiagnosisTroubleshooting In case of “H9” “J3” “J6”Check No.01Refer to P.87H9 : Outdoor temperature thermistorJ3

SiBE041102_A TroubleshootingService Diagnosis 774.19 Electrical Box Temperature RiseRemote Controller DisplayL3Method of Malfunction DetectionAn elect

Troubleshooting SiBE041102_A78 Service DiagnosisTroubleshootingCheck No.17Refer to P.92Check No.19Refer to P.93CautionWARNINGTo cool the electrical co

SiBE041102_A TroubleshootingService Diagnosis 794.20 Radiation Fin Temperature RiseRemote Controller DisplayL4Method of Malfunction DetectionA radiati

SiBE041102_A IntroductionviiiBe sure to install the product correctly by using the provided standard installation frame.Incorrect use of the installat

Troubleshooting SiBE041102_A80 Service DiagnosisTroubleshootingCheck No.17Refer to P.92Check No.19Refer to P.93Note: Refer to “Application of silicon

SiBE041102_A TroubleshootingService Diagnosis 814.21 Output Overcurrent DetectionRemote Controller DisplayL5Method of Malfunction DetectionAn output o

Troubleshooting SiBE041102_A82 Service DiagnosisTroubleshootingCheck No.15Refer to P.91Check No.17Refer to P.92Check No.18Refer to P.93Check No.22Refe

SiBE041102_A TroubleshootingService Diagnosis 834.22 Refrigerant ShortageRemote Controller DisplayU0Method of Malfunction DetectionRefrigerant shortag

Troubleshooting SiBE041102_A84 Service DiagnosisTroubleshootingCheck No.01Refer to P.87Check No.12Refer to P.89(R14447)CautionYESNGNONOYESYESYESNOYESN

SiBE041102_A TroubleshootingService Diagnosis 854.23 Low-voltage Detection or Over-voltage DetectionRemote Controller DisplayU2Method of Malfunction D

Troubleshooting SiBE041102_A86 Service DiagnosisTroubleshootingCorrect the power supply.Replace the outdoor unit PCB.Check for such factors for a long

SiBE041102_A CheckService Diagnosis 875. Check5.1 Thermistor Resistance CheckCheck No.01 Disconnect the connectors of the thermistors from the PCB, an

Check SiBE041102_A88 Service Diagnosis5.2 Hall IC CheckCheck No.04 1. Check the connector connection.2. With the power on, operation off, and the conn

SiBE041102_A CheckService Diagnosis 895.4 Electronic Expansion Valve CheckCheck No.12 Conduct the followings to check the electronic expansion valve (