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Troubleshooting

SiBE041010EA

Service Diagnosis

4.11 OL Activation (Compressor Overload)

Error Code

Method of Error
Detection

A compressor overload is detected through overload protector (OL).

Error Decision
Conditions

If the error repeats, the system is shut down.

Reset condition: Continuous run for about 60 minutes without any other error

Supposed
Causes

Disconnection of discharge pipe thermistor

Defective discharge pipe thermistor

Disconnection of connector [S40]

Disconnection of 2 terminals of OL (Q1L)

Defective OL (Q1L)

Broken OL harness

Defective electronic expansion valve or coil

Defective four way valve or coil

Defective outdoor unit PCB

Refrigerant shortage

Water mixed in refrigerant

Defective stop valve

Содержание FTX20JV1B

Страница 1: ...Service Manual Inverter Pair Wall Mounted Type J Series SiBE041010EA Applied Models z Inverter Pair Heat Pump...

Страница 2: ...FTX35JV1B ATX35JV1B FTX20J2V1B ATX20J2V1B FTX25J2V1B ATX25J2V1B FTX35J2V1B ATX35J2V1B Outdoor Unit RX20JV1B ARX20JV1B RX25JV1B ARX25JV1B RX35JV1B ARX35JV1B RX20J3V1B ARX20J3V1B RX25J3V1B ARX25J3V1B RX...

Страница 3: ...1 6 Automatic Operation 24 1 7 Thermostat Control 25 1 8 NIGHT SET Mode 26 1 9 ECONO Operation 26 1 10 Inverter POWERFUL Operation 27 1 11 Clock Setting 27 1 12 Other Functions 28 2 Function of Thermi...

Страница 4: ...69 4 15 Four Way Valve Abnormality 70 4 16 Discharge Pipe Temperature Control 72 4 17 High Pressure Control in Cooling 73 4 18 Compressor System Sensor Abnormality 74 4 19 Position Sensor Abnormality...

Страница 5: ...nits are Installed in 1 Room 97 3 2 Jumper Settings 97 4 Silicon Grease on Power Transistor Diode Bridge 98 Part 8 Appendix 99 1 Piping Diagrams 100 1 1 Indoor Unit 100 1 2 Outdoor Unit 101 2 Wiring D...

Страница 6: ...of Workers Warning Do not store the equipment in a room with successive fire sources e g naked flame gas appliance electric heater Be sure to disconnect the power cable plug from the plug socket befor...

Страница 7: ...22 in the refrigerant system If air enters the refrigerating system an excessively high pressure results causing equipment damage and injury Warning Caution Do not repair the electrical components wit...

Страница 8: ...neration or fire Be sure to use an exclusive power circuit for the equipment and follow the local technical standards related to the electrical equipment the internal wiring regulations and the instru...

Страница 9: ...nducted securely the equipment may fall and cause injury Check to make sure that the power cable plug is not dirty or loose then insert the plug into a power outlet securely If the plug has dust or lo...

Страница 10: ...grounded Improper grounding may cause an electrical shock Be sure to measure the insulation resistance after the repair and make sure that the resistance is 1 M or higher Faulty insulation may cause a...

Страница 11: ...evertheless be valuable to the reader such as tips and tricks Caution Caution A caution is used when there is danger that the reader through incorrect manipulation may damage equipment loose data get...

Страница 12: ...SiBE041010EA 1 List of Functions Part 1 List of Functions 1 Functions 2...

Страница 13: ...restart after power failure z z Horizontal auto swing right and left Self diagnosis digital LED display z z 3 D airflow COMFORT AIRFLOW operation z z Wiring error check function Comfort Control Auto...

Страница 14: ...tart after power failure z z Horizontal auto swing right and left Self diagnosis digital LED display z z 3 D airflow COMFORT AIRFLOW operation z z Wiring error check function Comfort Control Auto fan...

Страница 15: ...SiBE041010EA Specifications 4 Part 2 Specifications 1 Specifications 5...

Страница 16: ...t Left Horizontal Downward Right Left Horizontal Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 18 0 18 0 18 0 18 Power Consumption Rated...

Страница 17: ...Horizontal Downward Air Filter Removable Washable Mildew Proof Running Current Rated A 0 18 0 18 Power Consumption Rated W 40 40 Power Factor 96 6 96 6 Temperature Control Microcomputer Control Dimen...

Страница 18: ...rizontal Downward Right Left Horizontal Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 18 0 18 0 18 0 18 Power Consumption Rated W 40 40...

Страница 19: ...Horizontal Downward Air Filter Removable Washable Mildew Proof Running Current Rated A 0 18 0 18 Power Consumption Rated W 40 40 Power Factor 96 6 96 6 Temperature Control Microcomputer Control Dimen...

Страница 20: ...rizontal Downward Right Left Horizontal Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 18 0 18 0 18 0 18 Power Consumption Rated W 40 40...

Страница 21: ...Horizontal Downward Air Filter Removable Washable Mildew Proof Running Current Rated A 0 18 0 18 Power Consumption Rated W 40 40 Power Factor 96 6 96 6 Temperature Control Microcomputer Control Dimen...

Страница 22: ...orizontal Downward Right Left Horizontal Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 18 0 18 0 18 0 18 Power Consumption Rated W 40 40...

Страница 23: ...Horizontal Downward Air Filter Removable Washable Mildew Proof Running Current Rated A 0 18 0 18 Power Consumption Rated W 40 40 Power Factor 96 6 96 6 Temperature Control Microcomputer Control Dimen...

Страница 24: ...SiBE041010EA 13 Printed Circuit Board Connector Wiring Diagram Part 3 Printed Circuit Board Connector Wiring Diagram 1 Indoor Unit 14 2 Outdoor Unit 16...

Страница 25: ...Connector for display PCB 3 S32 Connector for indoor heat exchanger thermistor 4 S200 Connector for fan motor 5 S403 Connector for adaptor PCB option 6 H1 H2 H3 FG Connector for terminal board 7 V1 Va...

Страница 26: ...Display PCB 1 S27 Connector for control PCB 2 SW1 S1W Forced cooling operation ON OFF button Refer to page 95 for detail 3 LED1 H1P LED for operation green 4 LED2 H2P LED for timer yellow 5 RTH1 R1T...

Страница 27: ...coil 3 S40 Connector for overload protector 4 S70 Connector for fan motor 5 S80 Connector for four way valve coil 6 S90 Connector for thermistors outdoor temperature outdoor heat exchanger discharge...

Страница 28: ...gram Filter PCB 1 S11 Connector for main PCB 2 AC1 AC2 S Connector for terminal board 3 E1 E2 Terminal for earth wire 4 HL2 HN2 Connector for main PCB 5 HR1 Connector for reactor 6 FU3 Fuse 20 A 250 V...

Страница 29: ...ion 26 1 10 Inverter POWERFUL Operation 27 1 11 Clock Setting 27 1 12 Other Functions 28 2 Function of Thermistor 29 3 Control Specification 30 3 1 Mode Hierarchy 30 3 2 Frequency Control 30 3 3 Contr...

Страница 30: ...by the following 2 parameters The load condition of the operating indoor unit The difference between the room thermistor temperature and the target temperature Additional Control Parameters The target...

Страница 31: ...d cooling Once the set temperature is reached the energy saving operation enables to maintain the room temperature at low power Frequency Limits The following functions regulate the minimum and maximu...

Страница 32: ...Heating During heating operation the large flap directs airflow downward to spread the warm air to the entire room Wide Angle Louvers The louvers made of elastic synthetic resin provide a wide range o...

Страница 33: ...s range when the FAN setting button is set to automatic Cooling The following drawing explains the principle of fan speed control for cooling The upper limit is M tap in 30 minutes from the operation...

Страница 34: ...emperature at start up and the target temperature is divided into two zones Then the unit operates in an appropriate capacity for each zone to maintain the temperature and humidity at a comfortable le...

Страница 35: ...mistor C correction value 1 The set temperature determines the target temperature Ts 18 30 C 2 The target temperature is calculated as Tt Ts C where C 0 C 3 The thermostat ON OFF point and operation m...

Страница 36: ...fter being in the zone A The system resumes from defrost control in any zones except A The operation turns on in any zones except A The monitoring time has passed while the temperature difference is i...

Страница 37: ...a major bonus for those whose breaker capacities do not allow the use of multiple electrical devices and air conditioners It is easily activated from the wireless remote controller by pushing the ECON...

Страница 38: ...s the TIMER or button to set the clock to the present time Holding down the TIMER or button increases or decreases the time display rapidly 3 Press the CLOCK button again blinks and clock setting is c...

Страница 39: ...de refers to the following table Forced cooling operation Forced cooling operation can be started by pressing the ON OFF button for 5 to 9 seconds while the unit is not operating Refer to page 95 for...

Страница 40: ...ture used in place of the inner temperature of the compressor rises abnormally the operating frequency becomes lower or the operation halts 2 The discharge pipe thermistor is used for detecting discon...

Страница 41: ...by taking the following steps Air conditioner control mode Forced operation mode Forced cooling operation for pump down operation Power transistor test mode Normal operation mode Fan Cooling includes...

Страница 42: ...Q value of the indoor unit Q value Indoor unit output determined from indoor unit volume airflow rate and other factors PI Control Determine Frequency Up Down by D Signal 1 P control The D value is c...

Страница 43: ...y valve coil switches from ON to OFF when the heating is stopped the OFF delay switch of the four way valve is carried out Detail OFF delay switch of four way valve The four way valve coil is energize...

Страница 44: ...ischarge pipe temperature rises above a certain level the upper limit of frequency is set to keep the discharge pipe temperature from rising further Detail A Hz 58 B Hz 72 C Hz 90 D seconds 180 E seco...

Страница 45: ...er limit of the compressor frequency is defined as operation frequency 2 Hz After this the output frequency is lowered by 2 Hz every second until it reaches the keep zone Keep zone The present maximum...

Страница 46: ...hanger temperature determines the frequency upper limit to prevent abnormal high pressure Detail A C B C C C 11 9 7 R14718 Reset zone Indoor heat exchanger thermistor temperature Up zone Keep zone Dro...

Страница 47: ...l operation 5 Fan speed control during forced cooling operation The outdoor fan is controlled as well as normal operation during forced cooling operation 6 Fan speed control during POWERFUL operation...

Страница 48: ...r operates for 6 minutes More than A minutes of accumulated time pass after the start of the operation or ending the previous defrosting Conditions for Canceling Defrost The judgment is made with the...

Страница 49: ...n mode Cooling h h h h h h h h h h h h h h h h h Heating h h h h h h h h h h h h h h h h h h h Available Not available Starting control Control when the frequency changes Target discharge pipe tempera...

Страница 50: ...uring defrosting 3 11 4 Starting Operation Control The electronic expansion valve opening is controlled when the operation starts and prevents superheating or liquid compression 3 11 5 Control when th...

Страница 51: ...harge pipe temperature 6 C outdoor heat exchanger temperature Heating Discharge pipe temperature 6 C indoor heat exchanger temperature Adjustment when the thermistor is disconnected When the disconnec...

Страница 52: ...the compressor 3 12 3 Refrigerant Shortage Control Outline I Detecting by power consumption If the power consumption is below the specified value and the frequency is higher than the specified freque...

Страница 53: ...SiBE041010EA Remote Controller 42 Part 5 Remote Controller 1 Remote Controller 43...

Страница 54: ...the transmitter at the indoor unit If there is anything to block signals between the unit and the remote controller such as a curtain the unit will not operate The maximum distance for communication i...

Страница 55: ...me with TIMER setting button Press this button again to complete TIMER setting OFF TIMER button Press this button and adjust the day and time with TIMER setting button Press this button again to compl...

Страница 56: ...4 13 DC Fan Lock 68 4 14 Input Overcurrent Detection 69 4 15 Four Way Valve Abnormality 70 4 16 Discharge Pipe Temperature Control 72 4 17 High Pressure Control in Cooling 73 4 18 Compressor System S...

Страница 57: ...e thermistor malfunctions 2 When a signal transmission error occurs between the indoor and outdoor units In either case conduct the diagnostic procedure described in the following pages Service Monito...

Страница 58: ...OFF Check the outdoor temperature Heating operation cannot be used when the outdoor temperature is 18 CWB or higher and cooling operation cannot be used when the outdoor temperature is below 10 CDB D...

Страница 59: ...beeps indicate non corresponding codes 2 To return to the normal mode hold the timer cancel button down for 5 seconds When the remote controller is left untouched for 60 seconds it also returns to the...

Страница 60: ...he long beep 3 Diagnose by the sound beep The left side number does not correspond with the error code two consecutive beeps The left side number corresponds with the error code but the right side num...

Страница 61: ...beep Both the left side and right side numbers correspond with the error code 7 Determine the error code The numbers indicated when you hear the long beep are the error code Error codes and descripti...

Страница 62: ...abnormality 56 C9 Room temperature thermistor or related abnormality 56 Outdoor Unit E1 Outdoor unit PCB abnormality 64 E5 OL activation compressor overload 65 E6 Compressor lock 67 E7 DC fan lock 68...

Страница 63: ...eck the connection of connectors See Note Correct the connection OK Check the power supply voltage Start operation Voltage as rated Error repeats Check the power supply voltage Start operation Voltage...

Страница 64: ...Heating peak cut control During heating operation the indoor heat exchanger temperature is above 65 C Supposed Causes Short circuited air Clogged air filter of the indoor unit Dust accumulation on th...

Страница 65: ...or operation Error Decision Conditions The detected rotation speed does not reach the demanded rotation speed of the target tap and is less than 50 of the maximum fan motor rotation speed Supposed Cau...

Страница 66: ...the fan Is the rotation pulse generated Rotate the fan by hand Turn the power on again Check the fan motor for breakdown or short circuit Check No 03 Check the motor control voltage Check the indoor u...

Страница 67: ...ed Causes Disconnection of connector Thermistor corresponding to the error code is defective Defective indoor unit PCB Troubleshooting Check No 01 Refer to P 85 C4 Indoor heat exchanger thermistor C9...

Страница 68: ...for 7 minutes Input current input voltage A output frequency B Output frequency C Refrigerant shortage detection II The following conditions continue for 80 seconds Opening of the electronic expansion...

Страница 69: ...he pipe flare or replace the union Check the power transistor harness for loosening Correct it as required Also replace the cracked pipe Check the pipes for improper contact and correct them as requir...

Страница 70: ...t is below 180 V The compressor stops if the error occurs and restarts automatically after 3 minute standby Over voltage detection An over voltage signal is fed from the over voltage detection circuit...

Страница 71: ...YES YES Reconnect the harness Check the power supply voltage Check the connection of the compressor harness Disturbance factors Noise Power supply distortion Repeat a few times Precaution before turn...

Страница 72: ...cked whether it is normal Error Decision Conditions The data sent from the outdoor unit cannot be received normally or the content of the data is abnormal Supposed Causes Reduction of power supply vol...

Страница 73: ...D A blinking Properly insulated Is there any disturbance Is there any wiring error Check the indoor unit outdoor unit connection wires Check the LED A on the outdoor unit PCB Be sure to turn off the p...

Страница 74: ...ecting wires Wrong indoor unit PCB or outdoor unit PCB mounted Defective indoor unit PCB Defective outdoor unit PCB Troubleshooting R11707 Caution NO YES YES YES NO NO Check the code numbers 2P01234 f...

Страница 75: ...se Momentary fall of voltage Momentary power failure Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged NO YES YES R1910...

Страница 76: ...t down Reset condition Continuous run for about 60 minutes without any other error Supposed Causes Disconnection of discharge pipe thermistor Defective discharge pipe thermistor Disconnection of conne...

Страница 77: ...ce the discharge pipe thermistor Replace the electronic expansion valve or the coil Refer to the refrigerant line check procedure Replace the outdoor unit PCB Replace the four way valve or the coil Re...

Страница 78: ...ower Disconnect the harnesses U V and W R18317 Caution NO YES YES NO NO YES Check No 15 Check with the inverter analyzer Turn off the power and reconnect the harnesses Turn on the power again and rest...

Страница 79: ...the fan motor Foreign matter stuck in the fan Defective fan motor Defective outdoor unit PCB Troubleshooting Check No 16 Refer to P 90 R15675 Caution YES YES NO YES NO NO YES NO Turn on the power Rota...

Страница 80: ...tion Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged An input overcurrent may result from wrong internal wiring If the system is interrupted...

Страница 81: ...owing condition continues over 10 minutes after operating for 5 minutes Cooling Dry A B 5 C Heating B A 5 C A Room thermistor temperature B Indoor heat exchanger temperature If the error repeats the s...

Страница 82: ...gged Reconnect the thermistor s Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged R15824 Refrigerant shortage Water mixed Stop valve Fo...

Страница 83: ...t shortage Defective four way valve Water mixed in refrigerant Defective stop valve Defective outdoor unit PCB Troubleshooting Check No 01 Refer to P 85 Check No 12 Refer to P 87 Check No 14 Refer to...

Страница 84: ...ective outdoor unit PCB Troubleshooting Check No 01 Refer to P 85 Check No 12 Refer to P 87 Check No 17 Refer to P 91 Check No 18 Refer to P 91 Check No 19 Refer to P 92 R15667 Caution Replace the out...

Страница 85: ...oltage value The DC voltage before compressor start up is below 50 V Supposed Causes Broken or disconnected harness Defective outdoor unit PCB Troubleshooting Caution Be sure to turn off the power swi...

Страница 86: ...he position detection circuit Error Decision Conditions If the error repeats the system is shut down Reset condition Continuous run for about 11 minutes without any other error Supposed Causes Power s...

Страница 87: ...de bridge Check No 15 Check with the inverter analyzer Turn off the power Disconnect the harnesses U V and W Turn on the power Check the electrolytic capacitor voltage Electrical components or compres...

Страница 88: ...t current Error Decision Conditions The compressor running frequency is above 52 Hz The input current is also below 0 1 A If the error repeats the system is shut down Reset condition Continuous run fo...

Страница 89: ...n J3 error is judged if the discharge pipe temperature is lower than the heat exchanger temperature Supposed Causes Disconnection of the connector for the thermistor Thermistor corresponding to the er...

Страница 90: ...mistor s of the following thermistors Outdoor temperature thermistor Discharge pipe thermistor Outdoor heat exchanger thermistor Cooling Outdoor heat exchanger temperature Heating Indoor heat exchange...

Страница 91: ...on of connector Defective outdoor unit PCB Troubleshooting Check No 17 Refer to P 91 Check No 19 Refer to P 92 A C B C C C 93 70 78 Caution WARNING To cool the electrical components the outdoor fan st...

Страница 92: ...ure with the compressor on is above A C The error is cleared when the radiation fin temperature drops below B C If the error repeats the system is shut down Reset condition Continuous run for about 60...

Страница 93: ...Check No 17 Check the installation condition NO YES YES Above A C Radiation fin dirty Error displayed again Has the PCB been replaced Check if silicon grease is applied properly on the radiation fin I...

Страница 94: ...pressor is running A rotation speed error occurs while the compressor is running An output overcurrent signal is fed from the output overcurrent detection circuit to the microcomputer If the error rep...

Страница 95: ...es Turn on the power again and start operation Turn off the power and turn it on again to start the system See if the same error occurs Check the power supply voltage Monitor the power supply voltage...

Страница 96: ...PCB remove the thermistor and measure the resistance The data is for reference purpose only Thermistor temperature C Resistance k Room temperature thermistor Other thermistors 20 73 4 197 8 15 57 0 1...

Страница 97: ...age check 1 Check the connector for connection 2 Check the motor control voltage is generated between the pins 2 3 Rotation pulse check 1 Check the connector for connection 2 Turn the power on and sto...

Страница 98: ...PCB 2 Turn the power off and on again and check if the EV generates a latching sound 3 If the EV does not generate a latching sound in the above step 2 disconnect the connector and check the continui...

Страница 99: ...ooling Dry No continuity Heating Continuity Replace the outdoor unit PCB Replace the four way valve coil Replace the four way valve Four way valve coil resistance at 1000 2000 S80 voltage at 120 220 V...

Страница 100: ...f the terminals of the compressor are not FASTON terminals difficult to remove the wire on the terminals it is possible to connect wires available on site to the outdoor unit from the output side of t...

Страница 101: ...ion 1 When the output frequency is low the LEDs blink slowly As the output frequency increases the LEDs blink quicker The LEDs look like they are lit 2 On completion of the inverter analyzer diagnosis...

Страница 102: ...y Change the installation location or direction Change the installation location or direction Clean the outdoor heat exchanger Change the installation location or direction Check the outdoor temperatu...

Страница 103: ...resistance is or less than 1 k short circuit occurs on the main circuit R15001 YES YES NO NO Outdoor fan system is functioning Check the outdoor fan system Go to Check No 16 Outdoor fan running Fan mo...

Страница 104: ...connector Follow the procedure below to measure resistance between the terminals of the power module and the terminals of the compressor with a multi tester Evaluate the measurement results referring...

Страница 105: ...ervicing 1 Tips for Servicing 95 1 1 Pump Down Operation 95 1 2 Forced Cooling Operation 95 2 Trial Operation 96 3 Field Settings 97 3 1 When 2 Units are Installed in 1 Room 97 3 2 Jumper Settings 97...

Страница 106: ...voltage and may cause electric shock Gas stop valve Valve cap Close Liquid stop valve Service port R13628 Hexagonal wrench Item Forced Cooling Conditions The forced cooling operation is allowed when...

Страница 107: ...re that all functions and parts such as flap movement are working properly Note The air conditioner requires a small amount of power in standby mode If the system is not to be used for some time after...

Страница 108: ...ce the PCB if you accidentally cut a wrong jumper Jumpers are necessary for electronic circuit Improper operation may occur if you cut any of them For the location of the jumper refer to the following...

Страница 109: ...etail 1 Wipe off the old silicon grease completely 2 Apply the silicon grease evenly See the illustrations below for examples of application 3 Tighten the screws of the power transistor diode bridge 4...

Страница 110: ...iBE041010EA 99 Appendix Part 8 Appendix 1 Piping Diagrams 100 1 1 Indoor Unit 100 1 2 Outdoor Unit 101 2 Wiring Diagrams 102 2 1 Indoor Unit 102 2 2 Outdoor Unit 102 3 Removal Procedure Booklet No 103...

Страница 111: ...nit FTX20 25 35JV1B FTX20 25 35J2V1B ATX20 25 35JV1B ATX20 25 35J2V1B INDOOR UNIT HEAT EXCHANGER 7 0CuT 4 8CuT 7 0CuT 7 0CuT 7 0CuT CROSS FLOW FAN FIELD PIPING 6 4CuT M FAN MOTOR 9 5CuT FIELD PIPING 9...

Страница 112: ...TOR FOUR WAY VALVE ON HEATING GAS STOP VALVE LIQUID STOP VALVE FIELD PIPING 6 4CuT FIELD PIPING 9 5CuT MUFFLER WITH FILTER REFRIGERANT FLOW MUFFLER WITH FILTER C 3D058716C OUTDOOR UNIT HEAT EXCHANGER...

Страница 113: ...BACK ON AGAIN 3D058454B SA1 V1 V2 V3 X1M Y1E Y1R Z1C Z2C MRM20 FIELD WIRING INDOOR WHT IPM1 FU3 X1M DB1 L1R HR1 20A HR2 AC1 L1 BLK BRN L 1 1 MRM10 AC2 WHT V2 2 N 2 HN3 DB2 HN2 C5 HA1 HA2 S BLU GRY RE...

Страница 114: ...ure Booklet No Refer to the following booklets for removal procedure FTX20 25 35JV1B ATX20 25 35JV1B Refer to Si041051 FTX20 25 35J2V1B ATX20 25 35J2V1B Refer to Si041264 RX20 25 35JV1B ARX20 25 35JV1...

Страница 115: ...Revision History Month Year Version Revised contents 03 2010 SiBE041010 First edition 06 2013 SiBE041010EA Model addition FTX20 25 35J2V1B ATX20 25 35J2V1B RX20 25 35J3V1B ARX20 25 35J3V1B...

Страница 116: ...ies 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 acces...

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