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Daikin FTX20JV1B, Service Manual

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Daikin FTX20JV1B Service Manual Download Page 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

Summary of Contents for FTX20JV1B

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

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

Page 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...

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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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