Daikin ARX20J3V1B User Manual Download

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Service
Manual

Inverter Pair

Wall Mounted Type J-Series

SiBE041010EA

[Applied Models]

Inverter Pair : Heat Pump

Summary of Contents for ARX20J3V1B

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 RX35J3V1B ARX35J3V1B The removal procedure for each model is separately bound Refer to page 103 for the booklet number of applicable model ...

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 Thermistor 29 3 Control Specification 30 3 1 Mode Hierarchy 30 3 2 Frequency Control 30 3 3 Controls at Mode Changing Start up 32 3 4 Discharge Pipe Temperature Control 33 3 5 Input Current Control 34 3 6 ...

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 75 4 20 DC Voltage Current Sensor Abnormality 77 4 21 Thermistor or Related Abnormality Outdoor Unit 78 4 22 Electrical Box Temperature Rise 80 4 23 Radiation Fin Temperature Rise 81 4 24 Output Over...

Page 5: ...Units 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 Diagrams 102 2 1 Indoor Unit 102 2 2 Outdoor Unit 102 3 Removal Procedure Booklet No 103 ...

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 before disassembling the equipment for repair Working on the equipment that is connected to the power supply may cause an electrical shock If it is necessary to supply power to the equipment to conduct th...

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 with wet hands Working on the equipment with wet hands may cause an electrical shock Do not clean the air conditioner by splashing water Washing the unit with water may cause an electrical shock Be sure...

Page 8: ...eneration 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 instruction manual for installation when conducting electrical work Insufficient power circuit capacity and improper electrical work may cause an electrical shock or fire Be sure to use the specified cable...

Page 9: ...onducted 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 loose connection it may cause an electrical shock or fire Be sure to install the product correctly by using the provided standard installation frame Incorrect use of the installation frame and improper...

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 MΩ or higher Faulty insulation may cause an electrical shock Be sure to check the drainage of the indoor unit after the repair Faulty drainage may cause the water to enter the room and wet the furniture and floor Do not tilt the unit when re...

Page 11: ...nevertheless 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 an unexpected result or has to restart part of a procedure Warning Warning A warning is used when there is danger of personal injury Reference A reference guides the reader to other places in this bi...

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

Page 13: ...o 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 fan speed z z Anti corrosion treatment of outdoor heat exchanger z z Indoor unit quiet operation z z Flexibility Multi split split type compatible indoor unit z z NIGHT QUIET mode automatic Flexible ...

Page 14: ...start 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 speed z z Anti corrosion treatment of outdoor heat exchanger z z Indoor unit quiet operation z z Flexibility Multi split split type compatible indoor unit z z NIGHT QUIET mode automatic Flexible powe...

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

Page 16: ...ol Right 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 W 40 40 40 40 Power Factor 96 6 96 6 96 6 96 6 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 283 770 198 283 770 198 Packaged Dimensions H W D mm 263 840 ...

Page 17: ...Left 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 Dimensions H W D mm 283 770 198 Packaged Dimensions H W D mm 263 840 344 Weight Mass kg 7 Gross Weight Gross Mass kg 11 Sound Pressure Level H M L SL dB A 41 34 27 23 41 35 29 26 Sound Power Level dB 5...

Page 18: ...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 W 40 40 40 40 Power Factor 96 6 96 6 96 6 96 6 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 283 770 198 283 770 198 Packaged Dimensions H W D mm 266 846 345 266 8...

Page 19: ...Left 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 Dimensions H W D mm 283 770 198 Packaged Dimensions H W D mm 266 846 345 Weight Mass kg 7 Gross Weight Gross Mass kg 11 Sound Pressure Level H M L SL dB A 41 34 27 23 41 35 29 26 Sound Power Level dB 5...

Page 20: ...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 W 40 40 40 40 Power Factor 96 6 96 6 96 6 96 6 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 283 770 198 283 770 198 Packaged Dimensions H W D mm 263 840 344 263 8...

Page 21: ...Left 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 Dimensions H W D mm 283 770 198 Packaged Dimensions H W D mm 263 840 344 Weight Mass kg 7 Gross Weight Gross Mass kg 11 Sound Pressure Level H M L SL dB A 41 34 27 23 41 35 29 26 Sound Power Level dB 5...

Page 22: ... 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 W 40 40 40 40 Power Factor 96 6 96 6 96 6 96 6 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 283 770 198 283 770 198 Packaged Dimensions H W D mm 266 846 345 266 ...

Page 23: ...Left 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 Dimensions H W D mm 283 770 198 Packaged Dimensions H W D mm 266 846 345 Weight Mass kg 7 Gross Weight Gross Mass kg 11 Sound Pressure Level H M L SL dB A 41 34 27 23 41 35 29 26 Sound Power Level dB 5...

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 Varistor 8 JA Address setting jumper Refer to page 97 for detail 9 JB Fan speed setting when compressor stops for thermostat OFF JC Power failure recovery function auto restart Refer to page 97 for det...

Page 26: ...m 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 Room temperature thermistor S27 SW1 Solder side LED2 LED1 RTH1 3P206563 1 ...

Page 27: ...e 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 pipe 7 HL3 HN3 Connector for filter PCB 8 HR2 Connector for reactor 9 U V W Connector for compressor 10 FU1 FU2 Fuse 3 15 A 250 V 11 LED A LED for service monitor green 12 V1 Varistor 13 J5 Jumper fo...

Page 28: ...agram 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 7 V2 V3 Varistor HR1 S11 HN2 HL2 V2 E1 E2 V3 AC2 AC1 S FU3 3P206706 1 ...

Page 29: ...tion 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 Controls at Mode Changing Start up 32 3 4 Discharge Pipe Temperature Control 33 3 5 Input Current Control 34 3 6 Freeze up Protection Control 35 3 7 Heating Peak cut Control 35 3 8 Outdoor Fan Control 36 ...

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 frequency is adapted by additional parameters in the following cases Frequency restrictions Initial settings Forced cooling operation Inverter Principle To regulate the capacity a frequency control ...

Page 31: ...nd 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 maximum frequency Forced Cooling Operation Refer to page 95 for detail Refrigerant circulation rate high high f low f freq variable Refrigerant circulation rate low high speed low speed R2812 Amount of hea...

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 of airflow that guarantees comfortable air distribution Auto Swing The following table explains the auto swing process for cooling dry fan and heating COMFORT AIRFLOW Operation The vertical swing flap...

Page 33: ...is 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 start Heating In heating operation the fan speed is regulated according to the indoor heat exchanger temperature and the difference between the room thermistor temperature and the target temperature ...

Page 34: ...temperature 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 level Room thermistor temperature at start up Target temperature X Thermostat OFF point Y Thermostat ON point Z 24ºC or more Room thermistor temperature at start up X 2 5ºC X 0 5ºC or Y 0 5ºC zone B co...

Page 35: ...rmistor 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 mode switching point are as follows 1 Heating Cooling switching point Tr Tt 2 5 C 2 Cooling Heating switching point Tr Tt 2 5 C 3 The thermostat ON OFF point is the same as the ON OFF point of cooling...

Page 36: ...after 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 in the zone B Cooling Dry 10 minutes Heating 10 seconds Cooling Dry Heating Refer to Temperature Control on page 19 for detail B A OFF ON C Room thermistor temperature target temperature 1 5 C R12319 ...

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 ECONO button Detail When this function is activated the maximum capacity also decreases The remote controller can send the ECONO command when the unit is in cooling heating dry or automatic operation Thi...

Page 38: ...ss 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 completed Operation mode Fan speed Target temperature COOL H tap A rpm 18 C DRY Dry rotating speed A rpm Lowered by 2 5 C HEAT H tap A rpm 31 C FAN H tap A rpm AUTO Same as cooling heating in POWERFUL...

Page 39: ...ode 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 detail Note When the ON OFF button is pressed for 10 seconds or more the forced cooling operation is stopped 1 12 4 Titanium Apatite Photocatalytic Air Purifying Filter This filter combines the Air P...

Page 40: ...ature 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 disconnection of the discharge pipe thermistor 3 Indoor Heat Exchanger Thermistor 1 The indoor heat exchanger thermistor is used for controlling the target discharge pipe temperature The system sets the ta...

Page 41: ...d 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 drying Heating Heating Defrosting Stop indoor unit OFF Preheating operation Discharging from capacitor Stop R17533 Command frequency Limit frequency Skip control Upper limit function Compressor prot...

Page 42: ...e 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 calculated in each sampling time 20 seconds and the frequency is adjusted according to its difference from the frequency previously calculated 2 I control If the operating frequency does not change fo...

Page 43: ...ay 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 energized for 160 seconds after the operation is stopped 3 3 3 Four Way Valve Operation Compensation Outline At the beginning of the operation as the four way valve is switched the pressure difference to act...

Page 44: ...scharge 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 seconds 180 F seconds 10 sec Time R13528 Hz Frequency C B D E F A Zone Control Stop zone When the temperature reaches the stop zone the compressor stops Dropping zone The upper limit of frequency decreases...

Page 45: ...per 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 frequency goes on Reset zone Limit of the frequency is canceled Limitation of current dropping and stop value according to the outdoor temperature The current drops when outdoor temperature becomes ...

Page 46: ...changer 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 Dropping zone Stop zone 0 C C C B C A C 13 C Zone Control Stop zone When the temperature reaches the stop zone the compressor stops Dropping zone The upper limit of frequency decreases Keep zone The upp...

Page 47: ...al 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 The rotation speed of the outdoor fan is increased during POWERFUL operation 7 Fan speed control during indoor outdoor unit quiet operation The rotation speed of the outdoor fan is reduced by the com...

Page 48: ...or 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 outdoor heat exchanger temperature B C 20 25 class 35 class A minutes 28 28 B C 4 22 4 22 C Hz 68 72 D Hz 80 84 E seconds 80 80 F seconds 60 60 G seconds 510 510 H seconds 100 70 J pulse 450 450 K pu...

Page 49: ...on 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 temperature control Control for disconnection of the discharge pipe thermistor High discharge pipe temperature control Pressure equalizing control Opening limit control Starting control Control when the fre...

Page 50: ...during 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 the Frequency Changes When the target discharge pipe temperature control is active if the target frequency is changed to a specified value in a certain time period the target discharge pipe temperature...

Page 51: ...charge 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 disconnection is ascertained the compressor continues operation for 9 minutes and then stops If the compressor stops repeatedly the system is shut down 3 11 8 Target Discharge Pipe Temperature Control The tar...

Page 52: ...n 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 frequency it is regarded as refrigerant shortage The power consumption is low comparing with that in the normal operation when refrigerant is insufficient and refrigerant shortage is detected by checking p...

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 is approx 7 m ECONO 1 button ECONO operation POWERFUL 2 button POWERFUL operation ON OFF button Press this button once to start operation Press once again to stop it TEMPERATURE adjustment buttons Cha...

Page 55: ...ime 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 complete TIMER setting TIMER Setting button Changes the ON OFF TIMER settings CLOCK 5 button TIMER CANCEL button Cancels the timer setting In indoor unit quiet operation operation sound becomes weak The a...

Page 56: ...7 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 Sensor Abnormality 74 4 19 Position Sensor Abnormality 75 4 20 DC Voltage Current Sensor Abnormality 77 4 21 Thermistor or Related Abnormality Outdoor Unit 78 4 22 Electrical Box Temperature Rise 80 4...

Page 57: ...he 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 Monitor The indoor unit has one green LED LED A on the control PCB When the microcomputer works in order the LED A blinks 1 2 Outdoor Unit The outdoor unit has one green LED LED A on the PCB When the micro...

Page 58: ...p 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 Diagnose with remote controller indication 51 The unit operates but does not cool or does not heat Check for wiring and piping errors in the connection between the indoor unit and outdoor unit Check f...

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 normal mode 3 Not all the error codes are displayed When you cannot find the error code try the check method 2 Refer to page 49 No Code No Code No Code 1 00 13 C7 25 UA 2 U4 14 A3 26 UH 3 L5 15 H8 2...

Page 60: ...the 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 number does not long beep Both the left side and right side numbers correspond with the error code The numbers indicated when you hear the long beep are the error code Error codes and description Refer ...

Page 61: ...g 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 description Refer to page 51 8 Press the MODE button to exit from the diagnosis mode The display means the trial operation mode Refer to page 96 for trial operation 9 Press the ON OFF button twice to return t...

Page 62: ...d 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 E8 Input overcurrent detection 69 EA Four way valve abnormality 70 F3 Discharge pipe temperature control 72 F6 High pressure control in cooling 73 H0 Compressor system sensor abnormality 74 H6 Posit...

Page 63: ...heck 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 as rated Error repeats Error repeats YES NO NO YES NO NO YES R15310 Caution To secure the connection once disconnect the connector and then reconnect it YES NO YES NO YES NO YES Match the compatible...

Page 64: ...C 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 the indoor heat exchanger Defective indoor heat exchanger thermistor Defective indoor unit PCB Troubleshooting Check No 01 Refer to P 85 NO NO NO Check No 01 Check the indoor heat exchanger thermistor ...

Page 65: ...tor 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 Causes Disconnection of connector Foreign matters stuck in the fan Layer short inside the fan motor winding Breaking of wire inside the fan motor Breaking of the fan motor lead wires Defective capacitor...

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 unit PCB for rotation pulse Fan rotates smoothly Resistance OK Is the motor control voltage 15 VDC generated Correct the connection Remove the foreign matters Replace the indoor fan motor Replace the ...

Page 67: ...sed 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 Room temperature thermistor YES R15717 NO Check No 01 Check the thermistor resistance value YES NO Caution Correct the connection Replace the thermistor Replace the indoor unit PCB Normal Normal Chec...

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 valve D Discharge pipe temperature E target discharge pipe temperature F If the error repeats the system is shut down Reset condition Continuous run for about 60 minutes without any other error Supp...

Page 69: ...the 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 required Replace the cracked pipe Replace the electronic expansion valve Replace the defective thermistor s Completed Refrigerant shortage error again Oil oozing at internal piping Stop valve closed Compre...

Page 70: ...it 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 to the microcomputer The compressor stops if the error occurs and restarts automatically after 3 minute standby Supposed Causes Power supply voltage is not as specified Defective DC voltage detectio...

Page 71: ...O 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 turning on the power again Make sure the power has been off for at least 30 seconds Turn on the power again System restarted Loose or disconnected Is the voltage fluctuation within 10 from the rated valu...

Page 72: ...ecked 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 voltage Wiring error Breaking of the connection wires between the indoor and outdoor units wire No 3 Defective outdoor unit PCB Short circuit inside the fan motor winding Defective indoor unit PCB Distu...

Page 73: ...ED 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 power switch before connecting or disconnecting connectors or parts may be damaged Before you check the LED A cancel the standby electricity saving function by starting fan operation with the remote c...

Page 74: ...necting 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 for example of the indoor and outdoor unit PCB with the Parts List Match the compatible models Change for the correct PCB Replace the indoor unit PCB or the outdoor unit PCB OK Matched compatibly Corr...

Page 75: ...ise 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 R19101 YES NO NO Replace the outdoor unit PCB 2 Ground the system Zero cross signal abnormality Replace the outdoor unit PCB 1 Replace the harness Check if the outdoor unit is grounded Is LED A blinking G...

Page 76: ...ut 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...

Page 77: ...place 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 Replace the outdoor unit PCB Discharge pipe thermistor disconnected Check No 01 Check the thermistors Check No 13 Check the four way valve Check No 14 Check the refrigerant line Check No 12 Check the...

Page 78: ...power 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 restart the system Precaution before turning on the power again Make sure the power has been off for at least 30 seconds Correct the power supply or replace the outdoor unit PCB Inverter analyzer RSUK091...

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 Rotate the fan Check No 16 Check the rotation pulse input on the outdoor unit PCB Turn off the power and reconnect the connector Remove the foreign matters Replace the outdoor fan motor Replace the outdo...

Page 80: ...ution 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 by an input overcurrent after the wires have been disconnected and reconnected for part replacement check the wiring again R18798 NO YES YES NO Start operation and measure the input current Check No ...

Page 81: ...lowing 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 system is shut down Reset condition Continuous run for about 60 minutes without any other error Supposed Causes Disconnection of four way valve coil Defective four way valve coil or harness Defective ...

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 Four way valve coil disconnected loose Harness out of connector Any thermistor disconnected Check No 01 Check the thermistors Check No 14 Check the refrigerant line Check No 13 Check the four way valve ...

Page 83: ...nt 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 P 88 A C B C 1 above 45 Hz rising above 40 Hz dropping 110 97 2 30 45 Hz rising 25 40 Hz dropping 105 92 3 below 30 Hz rising below 25 Hz dropping 99 86 R15825 Caution NG OK OK OK NG NG Discharge pip...

Page 84: ...fective 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 outdoor fan motor Reconnect the connector or fan motor lead wires Replace the stop valve Replace the outdoor heat exchanger thermistor Replace the outdoor unit PCB Replace the electronic expansion valve...

Page 85: ...voltage 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 switch before connecting or disconnecting connectors or parts may be damaged NO R11712 YES Turn off the power and turn it on again YES NO Replace the harness Replace the outdoor unit PCB Is the harness ...

Page 86: ...the 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 supply voltage is not as specified Start up failure caused by the closed stop valve Defective outdoor unit PCB Disconnection of the compressor relay cable Input voltage is outside the specified range ...

Page 87: ...ode 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 compressor harnesses connected as specified Replace the outdoor unit PCB Replace the compressor Correct the power supply or replace the outdoor unit PCB Reconnect the electrical components or compressor har...

Page 88: ...ut 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 for about 60 minutes without any other error Supposed Causes Defective outdoor unit PCB Troubleshooting Replace the outdoor unit PCB Caution Be sure to turn off the power switch before connecting or di...

Page 89: ...on 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 error code is defective Defective heat exchanger thermistor in the case of J3 error outdoor heat exchanger thermistor in cooling operation or indoor heat exchanger thermistor in heating operation Defec...

Page 90: ...rmistor s of the following thermistors Outdoor temperature thermistor Discharge pipe thermistor Outdoor heat exchanger thermistor Cooling Outdoor heat exchanger temperature Heating Indoor heat exchanger temperature Replace the indoor heat exchanger thermistor Replace the outdoor unit PCB Error displayed again on remote controller Indoor heat exchanger thermistor functioning Check No 01 Check the t...

Page 91: ...ion 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 starts when the radiation fin temperature rises above C C and stops when it drops below B C R19118 YES NO Slightly dirty NG Too dirty OK NO YES Turn off the power and turn it on again Check the radiati...

Page 92: ...ture 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 minutes without any other error Supposed Causes Defective outdoor fan motor Short circuit Defective radiation fin thermistor Disconnection of connector Defective outdoor unit PCB Silicon grease is n...

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 If not apply the silicon grease Replace the outdoor unit PCB Clean up the radiation fin Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Repla...

Page 94: ...mpressor 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 repeats the system is shut down Reset condition Continuous run for about 11 minutes without any other error Supposed Causes Poor installation condition Closed stop valve Defective power module Wrong int...

Page 95: ...ses 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 discharge and suction pressures and other factors for a long term Possible causes Momentary fall of power supply voltage Compressor overload Short circuit Keep on using Check the connectors and other...

Page 96: ...PCB remove the thermistor and measure the resistance The data is for reference purpose only Thermistor temperature C Resistance kΩ Room temperature thermistor Other thermistors 20 73 4 197 8 15 57 0 148 2 10 44 7 112 1 5 35 3 85 60 0 28 2 65 93 5 22 6 51 14 10 18 3 39 99 15 14 8 31 52 20 12 1 25 02 25 10 0 20 00 30 8 2 16 10 35 6 9 13 04 40 5 8 10 62 45 4 9 8 707 50 4 1 7 176 R25 C 10 kΩ B 3435 K ...

Page 97: ...oltage 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 stop the operation 3 Check if the Hall IC generates the rotation pulse 4 times when the fan motor is manually rotated once between the pins 1 3 R11979 12 11 10 9 8 7 6 5 4 3 2 1 Phase U Free pin Free ...

Page 98: ...e 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 continuity using a tester 4 Check the continuity between the pins 1 6 3 6 2 5 4 5 between the pins 1 6 2 6 3 6 4 6 for the harness 5P models If there is no continuity between the pins the EV coil is faulty 5...

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 Ω S80 voltage at 120 220 VDC with compressor on Fig 1 R19102 Fig 1 Voltage at S80 120 220 VDC 3 seconds Time Compressor ON Refrigerant system check Check for refrigerant leakage See the service diagnosis on refrigerant short...

Page 100: ...If 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 the PCB Do not connect the wires to the compressor at the same time otherwise it may result in incorrect detection Step 3 Activate power transistor test operation from the indoor unit with the remote ...

Page 101: ...tion 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 be sure to re crimp the FASTON terminals Otherwise the terminals may be burned due to loosening 5 8 Rotation Pulse Check on the Outdoor Unit PCB Check No 16 1 Check that the voltage between the pins...

Page 102: ...ty 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 temperature The outdoor temperature should be within the operation range R15738 Not dirty YES YES Dirty NO NO NO YES Is the air filter or indoor outdoor heat exchanger dirty Is the connection pipe deformed Is...

Page 103: ...istance is or less than 1 kΩ 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 motor lead wire connector disconnected Reconnect the connector Negative terminal of tester positive terminal for digital tester 2 3 4 2 3 1 Positive terminal of tester negative terminal for digital tester...

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 to the following table Negative terminal of tester positive terminal for digital tester Power module UVW Power module UVW Positive terminal of tester negative terminal for digital tester UVW Power mod...

Page 105: ...Servicing 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 4 Silicon Grease on Power Transistor Diode Bridge 98 ...

Page 106: ...h 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 both of the following conditions are met 1 The outdoor unit is not abnormal and not in the 3 minute standby mode 2 The outdoor unit is not operating Start Press the forced cooling operation ON OFF bu...

Page 107: ...ure 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 installation shut off the circuit breaker to eliminate unnecessary power consumption If the circuit breaker trips to shut off the power to the air conditioner the system backs up the operation mode ...

Page 108: ...ace 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 pages Indoor unit P 14 Outdoor unit P 16 ADDRESS EXIST CUT 1 2 JA JA R12007 Address EXIST CUT 1 2 Jumper R14202 Jumper Function When connected factory setting When cut JB Fan speed setting when comp...

Page 109: ...Detail 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 Make sure that the heat radiation parts are firmly contacted to the radiation fin Note Smoke emission may be caused by bad heat radiation when the silicon grease is not appropriately applied OK Even...

Page 110: ...SiBE041010EA 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: ...Unit 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 5CuT REFRIGERANT FLOW COOLING HEATING THERMISTOR ON HEAT EXCH 4D058926R ...

Page 112: ...STOR 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 7 0CuT 7 0CuT 9 5CuT 7 0CuT 6 4CuT 6 4CuT 7 0CuT M 6 4CuT PROPELLER FAN 9 5CuT 9 5CuT 4 8CuT 9 5CuT 6 4CuT 9 5CuT 9 5CuT COMPRESSOR COOLING MUFFLER ACCUMULATOR HEATING DISCHARGE PIPE THERMISTOR GAS S...

Page 113: ...N 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 RED 3 3 C119 V3 C6 HL3 HL2 L ORG N FU1 MR30 GRN YLW W 3 15A V U FU2 SA1 MR4 V1 3 15A 1 WHT 1 DB3 E1 BLK PCB2 BLK BLK S11 S10 BLK GRN IPM2 PTC1 BLK E2 BLU RED PCB1 YLW BLK t BLK 9 9 BLK Z2C N 2 S70 S90 ...

Page 114: ...dure 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 35JV1B Refer to Si001073 RX20 25 35J3V1B ARX20 25 35J3V1B Refer to Si001276 ...

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: ...ries 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 accessories can result in water or refrigerant leakage electrical shock fire or explosion z Read the User s Manual carefully before using this product The User s Manual provides important safety instructi...

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