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Daikin VRV Aurora RXLQ-TATJU Series, Service Manual


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Troubleshooting by Error Code

SiUS341802EC

301

Part 6 Service Diagnosis

3.42  Wet Alarm

Applicable 

Models

All outdoor unit models

Error Code

F4

Method of Error 

Detection

In cooling operation, detect the condition under which liquid refrigerant returns to the compressor, 

according to the temperature and pressure of each part.

Error Decision 

Conditions

When the following wet state continues for a period of 90 minutes, an alert is issued.

An error is defined for 120 minutes.

Wet state in outdoor units

When the following wet state continues for a period of 45 minutes, an alert is issued.

Wet state in some of indoor units

Supposed 

Causes

Defective suction pipe thermistor

Defective compressor suction thermistor

Defective discharge pipe thermistor

Defective high pressure sensor

Defective indoor unit electronic expansion valve

Dirty air filter

Summary of Contents for VRV Aurora RXLQ-TATJU Series

Page 1: ...Service Manual Heat Pump 60 Hz SiUS341802EC 575 V RXYQ72 384TA Series 208 230 V RXLQ72 240TA TB Series 460 V RXLQ72 240TA TB Series 575 V RXLQ72 240TA TB Series Aurora Series...

Page 2: ...XYQ TA 16 4 Capacity Range 17 4 1 Connection Ratio 17 4 2 Outdoor Unit Combinations 18 5 Specifications 19 5 1 RXLQ TA RXLQ TB 19 5 2 RXYQ TA 31 Part 2 Refrigerant Circuit 36 1 Refrigerant Circuit Pip...

Page 3: ...2 3 Slave Unit Stops during Master Unit Control 87 3 Standby Control 88 3 1 Restart Standby 88 3 2 Crankcase Heater Control 88 4 Startup Control 89 4 1 Startup Control in Cooling 89 4 2 Startup Contro...

Page 4: ...l Heater Residual FXTQ TA FXTQ TB Models 134 9 16 Interlocked with External Equipment FXTQ TA FXTQ TB CXTQ TA Models 134 Part 5 Field Settings and Test Operation 136 1 Field Settings for Indoor Unit 1...

Page 5: ...14 Blower Motor Stops for Over Under Voltage 250 3 15 Electronic Expansion Valve Coil Abnormality Dust Clogging 251 3 16 Gas Furnace Abnormality 252 3 17 Drain Level above Limit 253 3 18 Self Cleanin...

Page 6: ...329 3 60 Inverter Radiation Fin Temperature Abnormality 330 3 61 Field Setting Abnormality after Replacing Outdoor Unit Main PCB or Combination of PCB Abnormality 332 3 62 Refrigerant Shortage 333 3 6...

Page 7: ...eck 377 4 6 Refrigerant Shortage Check 378 4 7 Vacuuming and Dehydration Procedure 379 4 8 Thermistor Check 380 4 9 Pressure Sensor Check 383 4 10 Broken Wire Check of the Relay Wires 384 4 11 Fan Mot...

Page 8: ...S341802EC 1 Introduction 1 Safety Cautions 2 1 1 Warnings and Cautions Regarding Safety of Workers 2 1 2 Warnings and Cautions Regarding Safety of Users 4 2 Icons Used 7 3 Revision History 8 Introduct...

Page 9: ...truction is shown in the illustration or near the symbol 1 1 Warnings and Cautions Regarding Safety of Workers This manual is for the person in charge of maintenance and inspection Warning Do not stor...

Page 10: ...The use of materials for R 22 refrigerant models may cause a serious accident such as a damage of refrigerant cycle or equipment failure Do not mix air or gas other than the specified refrigerant R 32...

Page 11: ...he same power outlet with other electrical appliances since it may cause an electrical shock excessive heat generation or fire Be sure to use an exclusive power circuit for the equipment and follow th...

Page 12: ...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 is dusty or has a loose connection it may cause an electrical shock or fire...

Page 13: ...ance is 1 M 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 water to enter the room and wet the fu...

Page 14: ...tion is used when there is danger that the reader through incorrect manipulation may damage equipment lose data get an unexpected result or have to restart part of a procedure Note Note Note provides...

Page 15: ...SiUS341802EA Model addition RXLQ72 240TATJA RXLQ72 240TAYDA RXLQ72 240TAYCA RXYQ72 384TAYCA 03 2022 SiUS341802EB Model addition FXZQ05 18TBVJU FXUQ18 36PAVJU BRC1H71W 01 2024 SiUS341802EC Model additi...

Page 16: ...2 External Appearance 13 2 1 Outdoor Unit 13 2 2 Indoor Unit 14 2 3 Air Treatment Equipment 15 3 Combination of Outdoor Units 16 3 1 RXLQ TA RXLQ TB 16 3 2 RXYQ TA 16 4 Capacity Range 17 4 1 Connectio...

Page 17: ...U YDA YCU YCA 240TB TJA YDA YCA Standard Series RXYQ 240TA 264TA 288TA 312TA 336TA 360TA 384TA YCU YCA Aurora Series RXLQ TATJU RXLQ TATJA RXLQ TBTJA 208 230 V Model name RXLQ72TATJU RXLQ96TATJU RXLQ1...

Page 18: ...RXLQ96TBYCA RXLQ120TBYCA RXLQ144TBYCA RXLQ192TBYCA RXLQ240TBYCA Outdoor unit 1 RXLQ72TBYCA RXLQ96TBYCA RXLQ120TBYCA RXLQ72TBYCA RXLQ96TBYCA RXLQ120TBYCA Outdoor unit 2 RXLQ72TBYCA RXLQ96TBYCA RXLQ120T...

Page 19: ...iling mounted duct Type FXDQ 07M 09M 12M 18M 24M MSP concealed ducted type FXSQ 05TA 07TA 09TA 12TA 15TA 18TA 24TA 30TA 36TA 48TA 54TA 05TB 07TB 09TB 12TB 15TB 18TB 24TB 30TB 36TB 48TB 54TB Ceiling mo...

Page 20: ...YCU RXYQ72 96 120 144 168TAYCA RXLQ72 96 120TATJA RXLQ72 96 120TAYDA RXLQ72 96 120TAYCA RXLQ72 96 120TBTJA RXLQ72 96 120TBYDA RXLQ72 96 120TBYCA RXLQ144 192 240TATJU RXLQ144 192 240TAYDU RXLQ144 192 2...

Page 21: ...mounted cassette Round flow type FXFQ P Shown with BYCP125K W1 Ceiling mounted duct type Middle and high static pressure FXMQ PB VISTATM 2 2 cassette type FXZQ TA FXZQ TB Ceiling mounted duct type Hi...

Page 22: ...ion 2 3 Air Treatment Equipment Wall mounted type FXAQ P Air handling unit FXTQ TA FXTQ TB Floor standing type FXLQ M Cased coil unit CXTQ TA Concealed floor standing type FXNQ M Outdoor air processin...

Page 23: ...1 For multiple connection the outdoor unit multi connection piping kit separately sold is required Model name System capacity Number of units Module Outdoor unit multi connection piping kit 1 Ton HP...

Page 24: ...on ratio must not exceed 100 It is permitted to use a maximum connection ratio of 130 in some circumstances please contact your local Daikin representative for further details RXYQ TA Type Min connect...

Page 25: ...Q TA Capacity range Ton 6 8 10 12 14 16 18 RXYQ 72TA 96TA 120TA 144TA 168TA 192TA 216TA Max number of connectable indoor units 12 16 20 25 29 33 37 Total capacity index of indoor units to be connected...

Page 26: ...5 4 61 67 4 63 5 67 4 3 Sound power level Reference data dB 79 80 5 84 5 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inverter overload protector Leak detecting d...

Page 27: ...zing connection 1 1 8 28 6 C1220T Brazing connection 1 3 8 34 9 C1220T Brazing connection Weight lbs kg 727 727 330 330 793 793 360 360 793 793 360 360 3 Sound pressure level Reference data dB A 63 68...

Page 28: ...20T Brazing connection 7 8 22 2 C1220T Brazing connection 1 1 8 28 6 C1220T Brazing connection Weight lbs kg 727 330 793 360 793 360 Sound pressure level Reference data dB A 60 65 3 61 67 3 63 5 67 3...

Page 29: ...ipe in mm 1 2 12 7 C1220T Brazing connection 5 8 15 9 C1220T Brazing connection 5 8 15 9 C1220T Brazing connection Gas pipe in mm 1 1 8 28 6 C1220T Brazing connection 1 1 8 28 6 C1220T Brazing connect...

Page 30: ...ound power level Reference data dB 79 80 5 84 5 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inverter overload protector Leak detecting device High pressure switc...

Page 31: ...onnection 1 1 8 28 6 C1220T Brazing connection 1 3 8 34 9 C1220T Brazing connection Weight lbs kg 727 727 330 330 793 793 360 360 793 793 360 360 3 Sound pressure level Reference data dB A 63 68 4 64...

Page 32: ...azing connection 7 8 22 2 C1220T Brazing connection 1 1 8 28 6 C1220T Brazing connection Weight lbs kg 727 330 793 360 793 360 Sound pressure level Reference data dB A 60 65 3 61 67 3 63 5 67 3 Sound...

Page 33: ...mm 1 2 12 7 C1220T Brazing connection 5 8 15 9 C1220T Brazing connection 5 8 15 9 C1220T Brazing connection Gas pipe in mm 1 1 8 28 6 C1220T Brazing connection 1 1 8 28 6 C1220T Brazing connection 1...

Page 34: ...und power level Reference data dB 79 80 5 84 5 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inverter overload protector Leak detecting device High pressure switch...

Page 35: ...nection 1 1 8 28 6 C1220T Brazing connection 1 3 8 34 9 C1220T Brazing connection Weight lbs kg 727 727 330 330 793 793 360 360 793 793 360 360 3 Sound pressure level Reference data dB A 63 68 4 64 70...

Page 36: ...azing connection 7 8 22 2 C1220T Brazing connection 1 1 8 28 6 C1220T Brazing connection Weight lbs kg 727 330 793 360 793 360 Sound pressure level Reference data dB A 60 65 3 61 67 3 63 5 67 3 Sound...

Page 37: ...mm 1 2 12 7 C1220T Brazing connection 5 8 15 9 C1220T Brazing connection 5 8 15 9 C1220T Brazing connection Gas pipe in mm 1 1 8 28 6 C1220T Brazing connection 1 1 8 28 6 C1220T Brazing connection 1...

Page 38: ...d power level Reference data dB 79 80 80 5 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inverter overload protector Leak detecting device High pressure switch Fan...

Page 39: ...wer level Reference data dB 87 88 Safety devices High pressure switch Fan driver overload protector Overcurrent fuse Inverter overload protector Leak detecting device High pressure switch Fan driver o...

Page 40: ...azing connection 1 1 8 28 6 C1220T Brazing connection 1 3 8 34 9 C1220T Brazing connection Weight lbs kg 727 727 330 330 727 727 330 330 727 727 330 330 3 Sound pressure level Reference data dB A 68 6...

Page 41: ...Brazing connection 1 3 8 34 9 C1220T Brazing connection 1 3 8 34 9 C1220T Brazing connection Weight lbs kg 727 793 330 360 793 793 360 360 793 793 360 360 3 Sound pressure level Reference data dB A 69...

Page 42: ...3 C1220T Brazing connection 1 5 8 41 3 C1220T Brazing connection Weight lbs kg 793 793 360 360 727 727 727 330 330 330 727 727 793 330 330 360 3 Sound pressure level Reference data dB A 69 70 70 5 3...

Page 43: ...r Processing Unit 44 2 Functional Parts Layout 45 2 1 RXLQ72TA RXLQ72TB RXYQ72 120TA 45 2 2 RXLQ96 120TA RXLQ96 120TB RXYQ144 168TA 48 3 Refrigerant Flow for Each Operation Mode 50 3 1 Cooling Operati...

Page 44: ...ipe Used to switch dual pressure gas pipe to high pressure or low pressure 14 Y5S Four way valve Heat exchanger lower Used to switch outdoor unit heat exchanger to evaporator or condenser 15 Y6S Four...

Page 45: ...re of compressor 35 R13T Thermistor Receiver gas purge Used to detect gas pipe temperature of receiver gas purge piping 36 R14T Thermistor M1C body Detects compressor surface temperature this switch i...

Page 46: ...e Check valve Electronic expansion valve Solenoid valve Pressure regulating valve Filter Filter Filter Electronic expansion valve Capillary tube Check valve Electronic expansion valve Plate heat excha...

Page 47: ...valve Check valve Electronic expansion valve Solenoid valve Pressure regulating valve Filter Filter Filter Electronic expansion valve Capillary tube Check valve Electronic expansion valve Plate heat e...

Page 48: ...d for thermostat control 3 Liquid pipe thermistor R2T R2T R2T Used for gas superheating degree control while in cooling or subcooling degree control while in heating 4 Gas pipe thermistor R3T R3T R3T...

Page 49: ...g connection port Liquid piping connection port C 4D034245S C 4D133246 4 2 1 3 LOWHU HDW H FKDQJHU LTXLG SLSH FRQQHFWLRQ SRUW LOWHU DQ OHFWURQLF H SDQVLRQ YDOYH 0 DV SLSH FRQQHFWLRQ SRUW LOWHU HDW H F...

Page 50: ...ing Diagrams SiUS341802EC 43 Part 2 Refrigerant Circuit FXMQ TA FXTQ TA FXTQ TB CXTQ TA 4 2 1 3 C 3D117738B C 4D068194 4 1 3 Indoor heat exchanger Filter Filter 4 1 3 Gas piping connection port Liquid...

Page 51: ...y tube Used to reduce pressure from high to low in bypassing hot gas 4 R1T Suction air thermistor Used to turn ON or OFF the thermostat 5 R2T Liquid pipe thermistor Used to control the opening degree...

Page 52: ...gas bypass Y2S Solenoid valve Liquid shutoff Y3S High pressure sensor S1NPH Section W W Plane View Thermistor Heat exchanger gas lower R9T Thermistor Suction R10T Front View Fan motor M2F Low pressure...

Page 53: ...detection R15T Electronic expansion valve Leak detection Y6E Thermistor Heat exchanger liquid upper R4T Thermistor Heat exchanger liquid lower R5T Thermistor Subcooling gas R6T Part B detail Electroni...

Page 54: ...Part 2 Refrigerant Circuit Back View of Electrical Box Refer to the illustration below for the location of the reactor thermistor R71T R72T for RXLQ72TATJU RXLQ72TATJA RXLQ72TBTJA Reactor thermistor...

Page 55: ...e Liquid shutoff Y3S High pressure sensor S1NPH Section W W Thermistor Heat exchanger gas lower R9T Thermistor Suction R10T Front View C 1P502446D C 1P502448C C 1P502450C Fan motor M2F Thermistor Outd...

Page 56: ...detection R15T Electronic expansion valve Leak detection Y6E Thermistor Heat exchanger liquid upper R4T Thermistor Heat exchanger liquid lower R5T Thermistor Subcooling gas R6T Part B detail Electroni...

Page 57: ...expansion valve Capillary tube Check valve Check valve Electronic expansion valve Solenoid valve Pressure regulating valve Filter Filter Filter Electronic expansion valve Capillary tube Check valve El...

Page 58: ...valve Check valve Electronic expansion valve Solenoid valve Pressure regulating valve Filter Filter Filter Electronic expansion valve Capillary tube Check valve Electronic expansion valve Plate heat e...

Page 59: ...eat exchanger Fusible plug Accumulator Filter Solenoid valve Four way valve Four way valve Filter Electronic expansion valve Electronic expansion valve Heat sink Fusible plug Receiver Electronic expan...

Page 60: ...sion valve Capillary tube Check valve Electronic expansion valve Plate heat exchanger Fan Filter Filter Gas pipe Four way valve Low pressure sensor Double tube heat exchanger Fusible plug Accumulator...

Page 61: ...RC1H71W 70 3 3 When Wireless Remote Controller is Used Together 72 4 Address Setting for Wireless Remote Controller 73 5 Centralized Control Group No Setting 75 5 1 BRC1E73 75 5 2 BRC1H71W 77 5 3 Wire...

Page 62: ...82A42W for BYFQ60C3W1W BRC082A42S for BYFQ60C3W1S BRC082A41W for BYFQ60B3W1 FXZQ TB BRC082A42W for BYFQ60C3W2W BRC082A41W for BYFQ60B3W1 FXZQ M BRC7E830 FXUQ P FXUQ PA FXEQ P FXDQ M BRC4C82 FXSQ TA BR...

Page 63: ...nds to press the buttons on the remote controller damage may result 1 Operation mode selector button Press this button to select the operation mode of your preference Available modes vary with the ind...

Page 64: ...highlight the next items on the right hand side Each screen is scrolled in the right hand direction 7 Left button Used to highlight the next items on the left hand side Each screen is scrolled in the...

Page 65: ...on mode changeover Fan speed control Menu display Confirmation of each setting On Off Cancel Operation lamp Press the Cancel button for 4 seconds or more Press the Cancel button once Press the Cancel...

Page 66: ...rating Blinks red Error is occurring Lights up blinks green Bluetooth connecting c LCD Displays the current setpoint and air conditioner operation status d NAVIGATE ADJUST button Navigate right Adjust...

Page 67: ...Installer menu Bluetooth Setting This screen is a menu for the administrator See the next page for items which can be selected 12 34 A3 01 Unit 00 This screen displays the time and the status of the...

Page 68: ...ection Airflow direction 1 setting h Depends on current setting Vertical Airflow Airflow direction 2 setting h Depends on current setting Ventilation Mode Ventilation mode setting h Depends on current...

Page 69: ...Contrast Contrast setting h h Clock Setting Clock setting h h Standard Temp Scale reference temperature setting h h About Administrator information h h Admin Password Administrator password setting h...

Page 70: ...o change the operation mode between cool and heat i Under centralized control Displayed if the system is under the management of a multi zone controller Optional and the operation of the system throug...

Page 71: ...controller setting Text mode Auto Cool 73 Room Icon mode 73 F 74 Text mode Scale screen Auto Cool Cool Warm Icon mode Scale screen When in the scale screen the setpoint can be changed in the range of...

Page 72: ...play the information screen Home screen Auto Cool 73 Room 73 F 74 Text mode Icon mode Press and hold on the Home screen for 5 seconds Information screen 12 34 The screen switches to the Information sc...

Page 73: ...ontroller during this time Not Displayed The remote controller has master control Able to select heating cooling operation Backup Indicates that backup operation is being carried out Energy savings In...

Page 74: ...The display shows the set fan speed When the INSPECTION TEST button is pressed the display shows the system mode is in 13 14 15 16 17 TIMER RESERVE CANCEL BUTTON AIRFLOW DIRECTION ADJUST BUTTON OPERA...

Page 75: ...ange a remote controller from Main to Sub proceed as follows 3 1 1 Field Settings The designation of the main and sub remote controllers can be swapped Note that this change requires turning the power...

Page 76: ...ou may change the Main Sub setting of the remote controller while Checking the connection Please stand by is displayed by pressing and holding the Mode Selector button for 4 seconds or longer 1 It is...

Page 77: ...to operation mode Filter auto clean Setback temperature setpoints Draft prevention If a sub controller does not display the home screen 2 minutes after its designation turn off the power Individual ai...

Page 78: ...nation 1 main 2 sub Home screen 2 When the U5 error code appears press and hold until 2 appears on the screen When the U8 error code appears press and hold until 1 appears on the screen Result A contr...

Page 79: ...a wired and a wireless remote controller for 1 indoor unit the wired controller should be set to Main Therefore the Main Sub switch SS1 of the signal receiver PCB must be set to Sub Main Sub Main Sub...

Page 80: ...le below The address for the wireless remote controller is set to 1 at the factory To change the setting proceed as follows 1 Press FILTER SIGN RESET button and INSPECTION TEST button at the same time...

Page 81: ...ngs A b Remote Controller Indoor Unit Multiple setting Display on remote controller Behavior to the remote controller operation when the functions are restricted as by an external control Other than t...

Page 82: ...up Address Select Group Address and then press the Menu OK button Press the Cancel button once Press the Cancel button once Service settings menu is displayed Item 2 is displayed Item 2 is displayed I...

Page 83: ...h the operation manual for maintenance Group Address Group Select Group Address and then press the Menu OK button Select Group Address Group and then press the Menu OK button Select the desired Group...

Page 84: ...e to enter field setting mode 2 Set mode No 00 with MODE button 3 Set the group No for each group with UP button or DOWN button 4 Enter the selected group numbers by pressing RESERVE button Group Addr...

Page 85: ...out 1 minute on the liquid crystal display This is not an operative fault UP button DOWN button MODE button RESERVE button Mode No Field setting mode Group No INSPECTION TEST button Central Remote Con...

Page 86: ...Cancel button for 4 seconds or more Press and hold the Cancel button for 4 seconds or more Select the desired item from the Maintenance menu and then press the Menu OK button Maintenance menu is displ...

Page 87: ...Airnet Address Unit No Address Set Outdoor unit Airnet Address Unit No Address Set Error History RC Error History Unit No Error Date Time Up to 10 errors received by the remote controller can be displ...

Page 88: ...Fan tap 1 Speed Fan speed rpm 2 FLAP Swing fixed EV Degree that electronic expansion valve is open pulse MP Drain pump ON OFF EH Electric heater ON OFF Hu Humidifier ON OFF 3 TBF Anti freezing contro...

Page 89: ...01 Displays the heat demand that CXTQ TA is currently sending to the gas furnace Displays the fan demand that CXTQ TA is currently sending to the gas furnace Current status of heat pump ON OFF for CXT...

Page 90: ...Administrator Menu Installer Menu SiUS341802EC 83 Part 3 Remote Controller 7 Administrator Menu Installer Menu 7 1 BRC1H71W Refer to page 61 for details...

Page 91: ...Valve PI Control 96 5 6 Step Control of Outdoor Fans 97 6 Protection Control 98 6 1 High Pressure Protection Control 98 6 2 Low Pressure Protection Control 100 6 3 Discharge Pipe Protection Control 1...

Page 92: ...eating Operation Only 126 9 10 Louver Control for Preventing Ceiling Dirt 127 9 11 Heater Control Except FXTQ TA FXTQ TB Models 128 9 12 Heater Control FXTQ TA FXTQ TB Models 129 9 13 Gas Furnace Cont...

Page 93: ...Crankcase heater control Startup control include pressure equalization before startup 1 Startup control in cooling 2 Startup control in heating Basic control 1 Normal Operation 2 Compressor PI contro...

Page 94: ...to Error Codes and Descriptions on page 216 of the troubleshooting for the items to determine the error 2 2 When System is in Stop Control The four way valves both for heat exchanger switch and pipin...

Page 95: ...system In addition the outdoor fan carry out the residual operation for a while to accelerate pressure equalizing and to suppress migration of the refrigerant to the evaporator 3 2 Crankcase Heater C...

Page 96: ...eously to position the four way valve 4 1 Startup Control in Cooling Refer to page 97 for Step X DSH Discharge pipe superheating degree Pc High pressure sensor detection value Pe Low pressure sensor d...

Page 97: ...Hz 10 rps 10 sec A B C D E 0 pulse Step 4 Step 8 OR PI control Compressor M1C Electronic expansion valve main Y1E Fan motor M1F M2F Frequency step up 5 sec interval Initial opening Pc Pe 0 42 MPa 60 9...

Page 98: ...n low load Superheating degree control 0 pulse in low load Electronic expansion valve Subcooling heat exchanger Y2E Superheating degree control discharge pipe protection Superheating degree control di...

Page 99: ...a F Te TeS Outdoor air temperature in Celsius C Outdoor air temperature in Fahrenheit F Low pressure equivalent saturation temperature Target temperature of Te Varies depending on Te setting operating...

Page 100: ...utdoor units the above diagram shows master unit slave unit 1 and slave unit 2 from left to right 2 Compressors may operate in any pattern other than those mentioned above according to the operating s...

Page 101: ...19 8 77 45 8 137 105 6 18 20 1 78 46 5 138 107 1 19 20 5 79 47 1 139 108 4 20 20 7 80 47 8 140 110 1 21 21 0 81 48 5 141 111 7 22 21 3 82 49 1 142 113 2 23 21 6 83 49 8 143 114 8 24 21 9 84 50 5 144...

Page 102: ...86 34 2 146 78 8 27 19 0 87 34 7 147 79 9 28 19 1 88 35 2 148 81 0 29 19 2 89 35 7 149 82 2 30 19 3 90 36 2 150 83 3 31 19 4 91 36 7 151 84 5 32 19 5 92 37 0 152 85 7 33 19 6 93 37 7 153 86 9 34 19 7...

Page 103: ...ubcooling electronic expansion valve EVT control In order to make the maximum use of the subcooling heat exchanger this function is used to exert PI control on the electronic expansion valve Y2E Y5E o...

Page 104: ...88 358 388 27 372 402 372 402 28 386 416 386 416 29 401 431 401 431 30 417 447 417 447 31 434 464 434 464 32 451 481 451 481 33 470 500 470 500 34 489 519 489 519 35 509 539 509 539 36 531 561 531 561...

Page 105: ...step down 1 step up 2 step down After 10 seconds After 15 seconds After 15 seconds After 10 seconds Pc 3 57 MPa 518 psi Pc 3 70 MPa 537 psi Pc 3 14 MPa 455 psi Pc 3 45 MPa 500 psi Pc 3 67 MPa 532 psi...

Page 106: ...2 MPa 540 psi Normal control 9 step down All units Compressor step 1 3 step up Current step maintained High pressure standby 2 times within 40 minutes Pc High pressure sensor detection value for maste...

Page 107: ...op E4 is displayed Low pressure standby 3 times within 60 minutes Low pressure standby 4 times within 60 minutes Normal control 9 step down 9 step up 3 step up 21 step down After 10 seconds After 15 s...

Page 108: ...er 20 seconds HTdi 135 C 275 F HTdi 120 C 248 F continues for 10 minutes Ti 120 C 248 F continues for 5 seconds Ti 115 C 239 F continues for 10 minutes OR HTdi Value of compressor discharge pipe tempe...

Page 109: ...4 F Compressor body temperature 135 C 275 F When occurring 3 times within 100 minutes the error code F3 is output Sub code 20 21 22 Normal control Inverter current standby Reduce compressor capacity...

Page 110: ...2TBYCA RXYQ72 96 120TAYCU RXYQ72 96 120TAYCA A more than 95 C 203 F more than 96 C 204 8 F more than 90 C 194 F B less than 92 C 197 6 F less than 93 C 199 4 F less than 87 C 188 6 F C more than 100 C...

Page 111: ...at exchanger mode For heat exchanger mode Electronic expansion valve Heat exchanger upper Y1E Same as normal control Same as normal control Electronic expansion valve Heat exchanger lower Y3E Electron...

Page 112: ...nt low pressure control Fan motor M1F M2F For heat exchanger mode Electronic expansion valve Heat exchanger upper Y1E Same as normal control Electronic expansion valve Heat exchanger lower Y3E Electro...

Page 113: ...sion valve Subcooling injection Y4E 760 pulse Electronic expansion valve Refrigerant cooling Y5E Same as normal control Electronic expansion valve Receiver gas purge Y7E 0 pulse Solenoid valve Oil sep...

Page 114: ...xample The following diagram shows outdoor unit rotation in combination of 3 outdoor units Master unit slave unit 1 and slave unit 2 in this section are the names for installation They are determined...

Page 115: ...ption the capacity of outdoor unit is forcibly reduced by using Demand 1 Setting or Demand 2 Setting To operate the unit with this mode additional setting of Continuous Demand Setting or external inpu...

Page 116: ...kit MP Drain pump kit ON MP Drain pump kit ON MP Closed Electronic expansion valve Capacity control Electronic expansion valve Closed YE MA OFF EH OFF EH Humidifier OFF Hu Humidifier OFF Hu YE The pr...

Page 117: ...Hu Fan Operating in L mode MF Fan Operating in L mode after it stops for 6 min MF YE Drain pump kit YE MP Swing flap Swing flap Set wind direction Fan MF Operating with set airflow rate YE Closed Pro...

Page 118: ...n operating in progress 4 min Is hot starting in progress Is defrost operation in progress Heating Operation A B Thermostat status No No 15 16 Option Option Option Option OFF Humidifier ON OFF Humidif...

Page 119: ...instruction from the remote controller the fan is put into operation in LL mode while in heating operation 13 Wind direction When the heating thermostat turns OFF the wind direction will be set to 10...

Page 120: ...ting in heating operation Control target temperature remote controller displayed temperature 2 C 3 6 F The temperature difference for cooling heating mode switching is 5 C 9 F The above also applies t...

Page 121: ...suction air thermistor and the infrared floor sensor It is difficult to use only suction air temperature control for underfoot air conditioning The temperature difference for cooling heating mode swi...

Page 122: ...tion temperature fine adjustment control is carried out using a suction air thermistor or using the remote controller thermistor near the position of the user when the suction temperature is near the...

Page 123: ...ture Assuming the set temperature in the figure above is 24 C 75 F and the suction temperature has changed from 18 C 64 F to 28 C 82 F A D This example also assumes there are several other air conditi...

Page 124: ...is set to 02 Tro will be the same as the cooling set temperature T Room temperature Remote controller set temperature Tro Room temperature at the start of dry operation Tr Room temperature 1 The ther...

Page 125: ...temperature to operate outside of use range To avoid the above condition a limit based on the suction air temperature is set for the use range of the temperature around people Cooling operation When...

Page 126: ...temp Differential value set to 1 C 1 8 F Set heating temp Set cooling temp Heating mode Control temp Differential value set to 2 C 3 6 F Heating mode Control temp Differential value set to 3 C 5 4 F...

Page 127: ...ously After the thermostat turns OFF the drain pump continues to operate for another 5 minutes Float switch Error display Thermostat running OFF OFF ON ON ON OFF Drain pump ON OFF 5 min OFF OFF ON ON...

Page 128: ...the drain pump turns ON simultaneously 1 If the float switch continues to turn OFF and ON 5 times consecutively it is judged as a drain system error and the error code AF is displayed on the remote co...

Page 129: ...lower As T Remote controller set temp Suction air temp becomes smaller SHS becomes higher Subcooling degree control in heating operation This function is used to adjust the opening of the electronic...

Page 130: ...re 1 C 30 2 F for total of 40 minutes or Liquid pipe temperature 5 C 23 F for total of 10 minutes Condition for cancelling Liquid pipe temperature 7 C 44 6 F for 10 minutes continuously Concept of fre...

Page 131: ...ature 1 C 33 8 F for total of 15 minutes or Liquid pipe temperature 0 C 32 F for 1 minute continuously During freeze up prevention control the airflow rate is fixed to LL The cancelling conditions are...

Page 132: ...Horizontal Hot start from thermostat OFF mode for prevention of cold air Swing LL Horizontal Horizontal Horizontal Horizontal Airflow direction set LL Horizontal Horizontal Horizontal Horizontal Stop...

Page 133: ...n is OFF before initiating the hot start OFF Hot start control Hot start in progress Normal control Normal control H L remote controller setting LL OFF Remote controller setting P0 Horizontal Fan Louv...

Page 134: ...nd FXEQ P models Factory setting FXFQ AA FXFQ T FXFQ P models draft prevention position FXZQ TA FXZQ TB FXZQ M FXEQ P models standard position P0 P1 P2 P4 P3 P0 P1 P2 P4 P3 P0 P0 P1 P2 P4 P4 P2 P1 P0...

Page 135: ...onducted by converting the heater temperature into the condensing pressure equivalent saturated temperature Tc according to the temperature detection through the high pressure sensor S1NPH of the outd...

Page 136: ...itions for the electric heater Heating Automatic heating Auxiliary heater enabled 1 Not in heating Automatic heating Auxiliary heater enabled 0 3 Heater not allowed Heater allowed Heater 1 OFF Heater...

Page 137: ...ot during defrost oil return Fan motor system error Heater ON permission Defrost oil return 0 4 1 High pressure condition 2 Liquid pipe temperature condition 3 Auxiliary heater enabled 4 Heater ON per...

Page 138: ...operation Heater 1 ON Heater 2 ON OFF for single heater Fan ON Electric heater capacity setting Setting not available Thermostat step 2 ON Time up Electric heater capacity setting Setting available N...

Page 139: ...furnace combustion heating Detail The airflow rate during gas furnace operation depends on the intensity of combustion heating and therefore may be different from the airflow setting displayed on the...

Page 140: ...ters refer to page 153 4 A and B values vary automatically based on the field setting 12 22 2 5 If directly after a change in conditions it is such that the thermostat could be either ON or OFF contro...

Page 141: ...the heater is ON the airflow rate of the fan will be whichever is the largest between the CFM dictated by the heater s own capacity or the fan tap CFM determined by other controls 2 Fan residual oper...

Page 142: ...mostat ON signal Cooling mode When the thermostat is ON External output ON 2 OR Tcon Ts continues for 1 minute Economizer set time 3 Free cooling only Economizer set time 3 Free cooling only Thermosta...

Page 143: ...Operation Control Mode 170 2 Field Setting from Outdoor Unit 172 2 1 Settings by DIP Switches 172 2 2 Accessing the BS Buttons on the PCB 175 2 3 Operating the BS Buttons and DIP Switches on the PCB 1...

Page 144: ...setting 1 Press and hold Cancel button for 4 seconds or more Service settings menu is displayed 2 Select Field Settings in the Service Settings menu and press Menu OK button Field settings screen is...

Page 145: ...een returns 8 In the case of multiple setting changes repeat 3 to 7 9 After all setting changes are completed press Cancel button twice 10 Backlight goes out and Checking the connection Please standby...

Page 146: ...Text mode Icon mode Mode 20 Unit 00 Enter Return Mode 20 Unit 00 a b Press or button to select Mode No and press a Mode No b Unit No Sub menu screen Text mode Icon mode Mode 20 Unit 00 Enter Return Mo...

Page 147: ...on mode Press or button to select Enter or and then press button to set the selection Sub menu screen Text mode Icon mode SW 00 Set Cancel 01 SW 00 01 b a Press or button select First Code No and then...

Page 148: ...he setting has been changed the screen may return to the home screen without returning to the installer menu CAUTION settings For more information see the installation manual of the optional accessory...

Page 149: ...TEST button for 4 seconds during normal mode to enter the field setting mode 2 Press the MODE button to select the desired mode No 3 Press the UP button to select the first code No 4 Press the DOWN bu...

Page 150: ...perature setting 4 During group control when setting by each indoor unit mode No 20 22 and 23 have been selected press the BS8 4 button unit No and select the indoor unit No to be set This operation i...

Page 151: ...off 2 Auxiliary electric heater OFF temperature Toff 3 Setting of airflow rate when heating Standard Slightly increased Increased 154 3 Electric heater setting Refer to page on the right for details 1...

Page 152: ...r to page on the right for details 162 6 External static pressure settings Refer to page on the right for details 163 14 24 4 Optional kit setting UV lamp humidifier economizer Refer to page on the ri...

Page 153: ...mperature h h h h h 3 Setting of airflow rate when heating h h h h h h 3 Electric heater setting 5 Electric heater capacity setting 6 Detection rate setting h h h h 7 Automatic airflow adjustment h 8...

Page 154: ...selection h h h h h h h h h 5 Individual ventilation setting h h h h h h h h h 1b 4 Display of error codes on the remote controller h h h h h h h h h 1c 0 Room temperature display h h h h h h h h h 1...

Page 155: ...c heater OFF temperature h h h h h h 3 Setting of airflow rate when heating 3 Electric heater setting h 5 Electric heater capacity setting h 6 Detection rate setting 7 Automatic airflow adjustment h 1...

Page 156: ...midifier interlock selection h h h h h h h h 5 Individual ventilation setting h h h h h h h h h h 1b 4 Display of error codes on the remote controller h h h h h h h h h h 1c 0 Room temperature display...

Page 157: ...ry setting for the Second Code No is 02 Setting 10 20 1 01 Long life filter 02 Ultra long life filter Filter contamination heavy light 10 20 0 Light 01 Heavy 02 Light 01 Heavy 02 Model FXFQ AA 2 500 h...

Page 158: ...6 18 20 22 24 26 28 30 32 34 66 2 62 6 69 8 73 4 77 80 6 84 2 87 8 91 4 95 98 6 F F 57 2 60 8 64 4 68 71 6 75 2 78 8 82 4 86 89 6 93 2 In cooling In heating Suction air temperature Suction air tempera...

Page 159: ...eld setting 10 20 2 has priority When field setting 10 20 6 01 is set at the same time as 10 20 2 01 02 03 field setting 10 20 6 has priority for group connection and 10 20 2 has priority for individu...

Page 160: ...20 C 68 F State of absence 30 60 60 120 Elapsed time of absence min The values in parentheses represent the time when Second code No is 02 Set temperature Toff S 1 Ton S 1 Thermostat OFF Thermostat O...

Page 161: ...7 2 F 3 5 C 6 3 F 3 C 5 4 F 2 5 C 4 5 F 2 C 3 6 F 1 5 C 2 7 F Toff 06 0 5 C 0 9 F h h h h h h 05 0 C 0 F h h h h h 04 0 5 C 0 9 F h h h h 03 1 C 1 8 F h h h 02 1 5 C 2 7 F h h 01 2 C 3 6 F h h Availa...

Page 162: ...c heater with heat pump allowed Not allowed 07 Electric heater with heat pump not allowed Allowed 08 Electric heater with heat pump allowed Allowed Factory setting Model Mode No First Code No Second C...

Page 163: ...ow rate control button to select High Middle or Low 3 Make settings to adjust the airflow rate automatically After setting to fan operation mode enter the field setting mode while operation is stopped...

Page 164: ...or sensor only Offset the detected value of the infrared floor sensor with a certain temperature This setting should be used to have the actual floor temperature detected when for example the unit is...

Page 165: ...ontroller is provided 04 In case of Error Display appears on the remote controller output is provided 05 06 07 Only for FXSQ TA FXSQ TB FXMQ PB FXMQ TB Economizer field supply ON OFF signal is provide...

Page 166: ...ter Power Failure Factory setting When the Auto Restart after Power Failure setting is turned OFF all the units will remain OFF after power failure or after the main power supply is restored When this...

Page 167: ...iling 1 or 2 initial setting by remote controller is required 2 A closing member kit optional is required for 4 3 or 2 direction airflow Mode No First Code No Second Code No Contents 12 22 6 01 LL tap...

Page 168: ...an 3 5 m 11 1 2 ft FXUQ P FXUQ PA Factory setting Mode No First Code No Second Code No Setting Ceiling height FXUQ18 24P A FXUQ30 36P A 13 23 0 01 Standard Lower than 2 7 m 8 3 4 ft Lower than 3 2 m 1...

Page 169: ...ction setting according to the respective purpose Factory setting When the model FXFQ AA is attached with a closing member kit set the Second Code No to 02 or 03 1 4 26 Setting of Static Pressure Sele...

Page 170: ...4 0 80 inWG 3 FXMQ54PB cannot be set to 30 Pa 0 12 inWG or 150 200 Pa 0 60 0 80 inWG FXSQ TA FXSQ TB models Factory setting Mode No First Code No Second Code No Contents 13 23 6 03 30 Pa 0 12 inWG 1 2...

Page 171: ...10 Pa 0 44 inWG 09 120 Pa 0 48 inWG 10 130 Pa 0 52 inWG 11 140 Pa 0 56 inWG 12 150 Pa 0 60 inWG 1 13 160 Pa 0 64 inWG 1 14 180 Pa 0 72 inWG 1 15 200 Pa 0 80 inWG 1 FXMQ TA models Factory setting Mode...

Page 172: ...Code No Second Code No Contents UV lamp humidifier fan speed Economizer setting for Mech standby duration minutes 14 24 4 01 Refer to controller 10 02 High 10 03 Refer to controller 20 04 High 20 05 R...

Page 173: ...conducts the fan residual operation by linking to indoor unit The indoor fan carries out residual operation for one minute after the thermostat is stopped For the purpose of preventing dust on the ai...

Page 174: ...is possible to change whether or not the room temperature is displayed for the detailed display screen Factory setting 1 4 39 Thermistor Sensor for Auto Changeover and Setback Control by the Remote Co...

Page 175: ...ed natural evaporation type humidifier or branch air duct is equipped due to the possibility of dew condensation This setting restricts the airflow block function preventing that the airflow block is...

Page 176: ...ng 2 Stage 1 2 3 4 Dip switch DS1 Heat Airflow Trim 15 10 OFF OFF OFF OFF 12 8 ON OFF OFF OFF 9 6 OFF ON OFF OFF 6 4 ON ON OFF OFF 3 2 OFF OFF ON OFF 0 0 ON OFF ON OFF 3 2 OFF ON ON OFF 6 4 ON ON ON O...

Page 177: ...by central remote controller only and OFF by remote controller only Centralized Used when you want to turn ON by central remote controller only and turn ON OFF freely by remote controller during set t...

Page 178: ...ontrol Operation mode setting Unified operation individual operation by central remote controller or operation controlled by timer Unified OFF individual stop by central remote controller or timer sto...

Page 179: ...tively possible to make several commissioning field setting through a personal computer interface for this option 999482P3 is required The installer can prepare the configuration off site on PC and af...

Page 180: ...refer to the table shown on the following page in order to make settings of spare PCB after replacement Enforce a re initialization of communication hold press the RETURN BS3 button for minimum 5 sec...

Page 181: ...IP switch Used to make field settings The figure below shows the required position of the DIP switches on spare PCB Change DIP switches at time of power disconnected Application model The setting meth...

Page 182: ...figure You can see the 3 BS buttons and the 3 seven segment displays and DIP switches Operate the switches and BS buttons with an insulated stick such as a closed ballpoint pen to avoid touching of li...

Page 183: ...n switches which are located on the outdoor unit PCB A1P Turn ON the power supply of the outdoor unit and all indoor units When the communication between indoor units and outdoor unit s is established...

Page 184: ...on Example Checking the content of parameter 1 10 to know how many indoor units are connected to the system Mode 1 Setting 10 Make sure the segment indication is displayed in operational default mode...

Page 185: ...setting of the outdoor unit s fan Mode 2 Setting 18 Make sure the segment indication is as during normal operation default situation when shipped from factory Press the MODE BS1 button for over 5 sec...

Page 186: ...X27A A1P 1 PC 2 Cable 999482P3 3 Outdoor unit main PCB 1 0 shows whether the unit you are checking is a master slave 1 or slave 2 unit No indication undefined situation 0 outdoor unit is master unit...

Page 187: ...operate at the selected power consumption limitation The second method is to enable power consumption limitation based on an external input For this operation an optional accessory is required 1 5 sho...

Page 188: ...pe area Per zone the optional PCB DTA104A61 62 needs to be installed Recommended location is in one of the VRV indoor units belonging to the system that will be set as Master cool heat unit field sett...

Page 189: ...s active it is not automatically returning to default when exit mode 2 2 6 Forced thermostat ON command all connected indoor units Default value 0 Not active Set 1 force all connected indoor units to...

Page 190: ...2 16 Heat pump lockout 1 Heat pump is always locked out when this setting is ON If the indoor fan control needs to be changed or the auto backup function is required refer to the setting 2 37 Value 2...

Page 191: ...vel during night time By changing this setting you can activate the automatic night time low noise operation function of the unit and define the level of operation Depending on the chosen level the no...

Page 192: ...n sequence by all 6 transistors Remove the U V W terminals of the compressor and connect to the inverter checker module If all 6 LEDs blink the transistors switch correctly When the power transistor c...

Page 193: ...ATJ and RXLQ72TBTJ 208 230 V unbalance maximum 2 at terminals L1D L2D L3D for RXLQ96 120TATJ and RXLQ96 120TBTJ 208 230 V unbalance maximum 2 at terminals L1B L2B L3B for RXLQ TAYD and RXLQ TBYD 460 V...

Page 194: ...t time low noise operation start setting Low noise mode instructing Operation sound set with External low noise setting 10 00 PM 8 00 PM 12 00 AM 6 00 AM 7 00 AM 8 00 AM Set with Night time low noise...

Page 195: ...ted to L tap when indoor units capacity 130 1 In heating mode fan speed is limited to L tap when indoor units capacity 130 2 Fan speed follows the setting of remote controllers not limited by indoor u...

Page 196: ...he setting 2 35 should be changed to 0 2 37 Heat pump lockout 2 Heat pump is locked out when this setting and an external input to ABC terminal are made Value 2 37 Heat pump lockout 2 0 default OFF 1...

Page 197: ...n PCB abnormality H9 Outdoor air thermistor R1T abnormality J3 Discharge pipe thermistor R21T abnormality Compressor body thermistor R14T abnormality J5 Compressor suction thermistor R12T abnormality...

Page 198: ...2 40 1 or 2 40 3 2 42 Outdoor fan noise countermeasure Change fans rotational speed and reduce noise by the interference of air blow noise between outdoor units Default value 0 Field setting Mode A 1...

Page 199: ...pump lockout temperature Heat pump is locked out when the outdoor ambient temperature is smaller than the heat pump lockout temperature This is only effective when the heat pump lockout 2 setting 2 37...

Page 200: ...more information and advice about the effect of these settings refer to Energy Saving and Optimum Operation on page 200 2 82 Heating comfort setting for VRT control Default value 1 Value 2 82 Heating...

Page 201: ...tes after changing setting to 1 2 Turn off indoor unit using remote controller and wait 10 minutes before shutting off power to indoor unit If remote controller indicates Defrost mode wait 10 minutes...

Page 202: ...97 Auxiliary heater maximum allowable temperature Auxiliary heater is allowed to energize when the ambient temperature is smaller than the auxiliary heater maximum allowable temperature Auxiliary hea...

Page 203: ...ystem into normal operation mode B When night time low noise operation is carried out automatically External control adaptor for outdoor unit is not required 1 While in setting mode 2 select a night t...

Page 204: ...level set with night time low noise operation setting 6 00 AM 8 00 PM 10 00 PM 12 00 AM 7 00 AM 8 00 AM Set with night time low noise operation end setting Factory setting is 8 00 AM Set with night ti...

Page 205: ...When the Normal demand operation is carried out Use of the external control adaptor for outdoor unit is not required 1 While in setting mode 2 set the item 2 32 Setting of alternate demand to ON 2 Wh...

Page 206: ...t with Demand 1 level setting When the Normal demand setting is set to ON OFF has been set at factory the power consumption can be set with the Demand 1 level setting 70 of rated power consumption has...

Page 207: ...rameters to the needs of your building and to realize the best balance between energy consumption and comfort 2 7 1 Target Temperature Settings Basic The refrigerant temperature is fixed independent f...

Page 208: ...e quickly Powerful Overshoot during heating operation or undershoot during cooling operation is allowed compare to the requested refrigerant temperature in order to achieve the required room temperatu...

Page 209: ...perature is allowed to go up to 115 F 46 C on temporary base depending on the situation When the request from the indoor units becomes more moderate the system will eventually go to the steady state c...

Page 210: ...the gas stop valve Checkpoints Cautions or warnings Are all units securely installed Dangerous for turning over during storm Possible damage to pipe connections Is the ground wire installed according...

Page 211: ...d if the compressor is running at this time After that the gas furnace will run in tens of seconds Tens of minutes might well be needed to stop compressor if the outdoor unit is particular operation 7...

Page 212: ...ot Running 244 3 10 Indoor Fan Motor Status Abnormality 245 3 11 Low Indoor Airflow 246 3 12 Swing Flap Motor Abnormality 247 3 13 Power Supply Voltage Abnormality 249 3 14 Blower Motor Stops for Over...

Page 213: ...313 3 52 Reactor Temperature Rise Abnormality 314 3 53 Inverter Radiation Fin Temperature Rise Abnormality 315 3 54 Compressor Instantaneous Overcurrent 319 3 55 Compressor Overcurrent 321 3 56 Compr...

Page 214: ...Communication System Combination Error After Initial Setting for Communication Completes 366 4 Check 367 4 1 High Pressure Check 367 4 2 Low Pressure Check 368 4 3 Superheat Operation Check 370 4 4 P...

Page 215: ...ditioning load IN COOLING Too many heat sources e g OA equipment located in a room IN DRYING The reason is that the dry operation serves not to reduce the room temperature where possible Change the sy...

Page 216: ...setting button makes no changes in the airflow rate In heating operation when the room temperature reaches the set degree the outdoor unit will stop while the indoor unit is brought to fan LL operati...

Page 217: ...welling Normal operation Outdoor unit Pitch of operating sounds changes The reason is that the compressor changes the operating frequency Normal operation 12 Dust comes out from the system Dust comes...

Page 218: ...operation while the compressor is during operation or under stop control or right after defrost IN or defrost OUT Wait until the operation becomes stable 2 Operation does not switch from heat pump to...

Page 219: ...ing airflow block the airflow block will be routinely lifted become horizontal during heating operation No defect Set louver to horizontal P0 during thermostat OFF 9 The infrared presence sensor deter...

Page 220: ...ng corrective action Operation Status Display Abnormal shutdown The system stops operating The operation lamp green starts to blink The message Error Push Menu button will blink at the bottom of the s...

Page 221: ...the remote controller starts to beep 3 short beeps Follow all steps below 1 short beep Follow steps 3 and 4 Continue the operation in step 4 until you hear a continuous beep This continuous beep indic...

Page 222: ...er automatically returns to the normal mode O0 A C E H F J L P U 9 8 7 6 5 4 UP button DOWN button 0 1 2 3 4 5 6 7 8 9 A H C J E F UP button DOWN button If no button is pressed for 1 minute equipment...

Page 223: ...ation error 268 Climate Talk communication error 269 C4 l Indoor heat exchanger liquid pipe thermistor abnormality 270 C5 l Indoor heat exchanger gas pipe thermistor abnormality 270 C6 l Combination e...

Page 224: ...t 321 L9 l Compressor startup abnormality 323 LC l Transmission error between inverter PCB and outdoor unit main PCB 325 P1 l Power supply voltage imbalance 327 P3 l Reactor surface thermistor abnorma...

Page 225: ...he connector X12A on the panel PCB and the connectors X18A and X19A on the sensor PCB AH 05 Dust collection sign error when the self cleaning decoration panel is mounted Check for clogging with dust a...

Page 226: ...1PH Slave 1 E3 05 E3 06 Activation of high pressure switch S1PH Slave 2 E3 07 High pressure standby E3 latch error System integrated E3 13 Liquid stop valve check error Master E3 14 Liquid stop valve...

Page 227: ...1 E9 06 Electronic expansion valve coil Y2E error Slave 1 E9 07 Electronic expansion valve coil Y3E error Slave 1 E9 08 Electronic expansion valve coil Y1E error Slave 2 E9 09 Electronic expansion va...

Page 228: ...inverter PCB Master unit Refer to the H3 flowchart and make a diagnosis of the relevant unit based on the Error code shown to the left H3 04 Harness abnormality Main inverter PCB Slave unit 1 H3 06 H...

Page 229: ...ective compressor body thermistor R14T Open Slave 1 J3 50 Defective compressor body thermistor R14T Short Slave 1 J3 51 Defective compressor body thermistor R14T Open Slave 2 J3 52 Defective compresso...

Page 230: ...Refer to the J7 flowchart and make a diagnosis of the relevant thermistor of the relevant unit based on the Error code shown to the left J7 02 Defective receiver inlet thermistor R3T Slave 1 J7 03 De...

Page 231: ...iver gas purge thermistor R13T Slave 2 JA 06 Defective high pressure sensor S1NPH Open Master Refer to the JA flowchart and make a diagnosis of the relevant sensor based on the Error code shown to the...

Page 232: ...an M1F Slave 1 L1 33 Defective fan PCB EEPROM Fan M2F Slave 1 L1 34 Defective fan PCB EEPROM Fan M1F Slave 2 L1 35 Defective fan PCB EEPROM Fan M2F Slave 2 L1 36 Defective inverter PCB EEPROM Compress...

Page 233: ...M1C startup error Master Refer to the L9 flowchart and make a diagnosis of the relevant unit based on the Error code shown to the left L9 05 Compressor M1C startup error Slave 1 L9 06 Compressor M1C s...

Page 234: ...2 P4 18 Defective fan M2F fin sensor Slave 2 PJ 04 Incorrect type of inverter PCB Master Refer to the PJ flowchart and make a diagnosis of the relevant unit based on the Error code shown to the left P...

Page 235: ...rvoltage Slave 1 U2 40 Fan motor 1 undervoltage Slave 2 U2 41 Fan motor 2 undervoltage Slave 2 U3 02 Initial installation warning Refer to the U3 flowchart and make a diagnosis of the relevant unit ba...

Page 236: ...i unit combination error UF 01 Wrong wiring check error Refer to the UF flowchart and make a diagnosis of the relevant unit based on the Error code shown to the left UF 05 Defective stop valve for tes...

Page 237: ...et to external ON OFF terminal Supposed Causes Activation of external protection device Improper field setting Defective indoor unit control PCB Troubleshooting ON OFF input from outdoor mode No 12 fi...

Page 238: ...own 24 VAC power is not supplied to TH2 and TR2 terminals FXTQ TA FXTQ TB or R and C terminals CXTQ TA on the indoor unit PCB Troubleshooting Fuse F1U is blown 24 VAC power is supplied to TH2 and TR2...

Page 239: ...nvolatile memory Maintains memory contents even when the power supply is turned OFF Supposed Causes Defective indoor unit control PCB External factor Noise etc Troubleshooting Turn the power supply OF...

Page 240: ...fore connecting or disconnecting connectors or parts may be damaged Replace the float switch S1L Modify the float switch s connection and turn ON again Connect the drain pump and turn ON again Connect...

Page 241: ...o the criteria 3 within 5 minutes of resetting the power supply A Model 1 Float switch S1L short circuit connector 2 Drain pump M1P connector 3 Drain pump M1P voltage Note FXFQ AA X15A X25A 13 VDC FXF...

Page 242: ...roken wires in short circuit of or disconnection of connectors from the fan motor harness Defective fan motor Broken wires or defective insulation Abnormal signal output from the fan motor defective c...

Page 243: ...criteria Disconnect the connector from the fan motor and then make measurement of resistance between pins Turn OFF the power supply and then wait for a period of 10 minutes Replace the indoor unit co...

Page 244: ...an motor lock motor related or external factors Defective fan motor disconnection or insulation failure Defective indoor unit PCB Troubleshooting Connect the connector correctly Turn OFF the power sup...

Page 245: ...ence 1 Check also if the relay connector between the indoor unit control PCB and the fan motor are correctly connected CHECK 16 Refer to page 386 YES Replace the fan motor M1F Replace the indoor unit...

Page 246: ...ed Causes Defective indoor fan motor Broken wires Defective contact Troubleshooting CHECK 16 Refer to page 386 NO YES YES Is the X4A connector securely connected NO Is the power of 12 VDC supplied bet...

Page 247: ...n motor in operation Error from the position signal of the fan motor Error from the current flow on the fan PCB when the fan motor starting operation Error Decision Conditions An overcurrent flows The...

Page 248: ...eplace the indoor fan motor M1F YES NO YES The fan can be moved lightly by hand after the fan motor connector of the fan PCB A2P is removed Replace the indoor fan motor M1F NO YES NO YES There is a fo...

Page 249: ...ween GND and Hw Hv or Hu terminals are short circuited Replace the indoor fan motor M1F YES Replace the fan PCB A2P YES NO The resistance among U V and W are unbalanced or short circuited NO The HAP l...

Page 250: ...Supposed Causes Defective power supply for the indoor fan motor Clogged drain piping Activation of the indoor unit safety device Defective contact in the fan wiring circuit Troubleshooting Properly co...

Page 251: ...the rotation speed at 5 second intervals using the feedback of the fan motor Performs rotation sampling 720 times takes approximately one hour and if the rotation speed falls below 50 rpm over 100 tim...

Page 252: ...f the information shows Motor Lost Control or Current Trip status it will be deemed a MOTOR TRIP abnormal operation The system stops operating Error Reset Conditions If the indoor unit stops receiving...

Page 253: ...tarts If during this the rotation command is stopped the 5 second interval check is halted but the counted number will be kept When the rotation command is restarted the checks will resume Error Reset...

Page 254: ...ipped with a swing flap function The swing motor works when the power supply is turned OFF and then restart The relay cable is short circuited or disconnected Caution Be sure to turn off the power swi...

Page 255: ...1S FXAQ P X36A M1S Replace the power supply relay cable Replace the defective swing motor 2 Take the flap cam mechanism apart reassemble and turn ON again YES NO YES NO The relay cable has no continui...

Page 256: ...nal line Defective wiring Instantaneous power failure others Troubleshooting Check the condition of the power supply 1 Check if power supply voltage is 208 230 V 10 2 Check if there is power open phas...

Page 257: ...ows abnormality Error Decision Conditions If the information shows Over Under Voltage status it will be deemed a MOTOR VOLTS abnormal operation Error Reset Conditions Reset by remote controller Suppos...

Page 258: ...ture of liquid pipe of heat exchanger Supposed Causes Defective electronic expansion valve coil Defective indoor unit control PCB Defective relay cables Troubleshooting CHECK 18 Refer to page 390 NO Y...

Page 259: ...h error code of the gas furnace Refer to the gas furnace manual for details Troubleshooting 1 In some cases of gas furnace abnormality regarding gas combustion once an error occurs display indication...

Page 260: ...tch changes from ON to OFF while the compressor is not in operation Error code is displayed but the system operates continuously Supposed Causes Humidifier unit optional accessory leaking Defective dr...

Page 261: ...or unit Dust detection sensor light receiving side is short circuited The total of fan operation time exceeds a specified value after dust collection sign display Limit switch does not detect when air...

Page 262: ...und the dust box NO NO Go to Diagnosis Flowchart 4 Air filter rotation error AH 06 Is the rotation of air filter normal YES NO Go to Diagnosis Flowchart 5 Damper rotation error AH 07 Does the damper o...

Page 263: ...Transmission error between self cleaning decoration panel and indoor unit Diagnosis Flowchart 1 NO Properly connect the connector Is the connector X1A on the self cleaning decoration panel PCB properl...

Page 264: ...eaning decoration panel PCB AH 04 Dust detection sensor error Diagnosis Flowchart 2 NO Properly connect the connector Is the connector X12A on the self cleaning decoration panel PCB properly connected...

Page 265: ...Replace the harness YES Remove the external factor Is there any external factor other than the error such as noise NO Turn OFF the power supply and then turn it ON again Then start operation with remo...

Page 266: ...atter Is there any foreign matter in the filter drive motor or drive parts NO YES Replace the air filter Is the filter damaged NO YES Replace the filter drive gear Is the filter drive gear damaged NO...

Page 267: ...test operation refer to the operation manual of the self cleaning decoration panel YES NO Normal Error AH recurs or the self cleaning decoration panel lamp red blinks The error could be caused by othe...

Page 268: ...the foreign matter Is there any foreign matter in the damper drive motor or drive parts NO YES Replace the damper or damper drive gear Is the damper or damper drive gear damaged NO A Go to the next p...

Page 269: ...test operation refer to the operation manual of the self cleaning decoration panel YES NO Normal Error AH recurs or the self cleaning decoration panel lamp red blinks The error could be caused by othe...

Page 270: ...d AH 08 Filter auto clean operation error Diagnosis Flowchart 6 NO YES Remove the external factor Is there any external factor other than the error such as noise Turn OFF the power supply and then tur...

Page 271: ...Stop the air conditioning operation and perform filter auto clean operation 1 Please set a time period during which air conditioning operation is stopped for about 20 minutes every day Has any air co...

Page 272: ...city code is not saved to the PCB and the capacity setting adaptor is not connected When a capacity that does not exist for that unit is set Supposed Causes The capacity setting adaptor was not instal...

Page 273: ...or Detection Transmission conditions between the indoor unit control PCB A1P and fan PCB A2P are checked via microcomputer Error Decision Conditions When normal transmission is not carried out for a c...

Page 274: ...and connect X70A back to original condition Under above field setting mode second code No is 01 NO NO YES Replace the fan PCB A2P YES YES Is the connector between indoor unit control PCB A1P and fan P...

Page 275: ...abnormal message and determined as such by the indoor unit the indoor unit will execute a retry If everything fails for 5 seconds it is deemed to be a transmission abnormality Error Reset Conditions I...

Page 276: ...posed Causes Disconnection of the communication wire between the CXTQ TA and the gas furnace Power supply to the gas furnace is cut Troubleshooting NO Caution Be sure to turn off the power switch befo...

Page 277: ...C9 for FXTQ TA FXTQ TB and CXTQ TA models CHECK 11 Refer to page 380 Is the thermistor normal Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may b...

Page 278: ...connection of capacity setting adaptor Field setting error Troubleshooting NO Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Was ind...

Page 279: ...connection of the capacity setting adaptor Wrong field setting Troubleshooting Is the indoor unit PCB A1P replaced by the spare PCB After transmission between the indoor and the outdoor PCBs is establ...

Page 280: ...information on the manufacturer ID and output of the fan motor when initializing the fan motor If those figures are not the values recognized by the indoor unit it will be deemed abnormal operation If...

Page 281: ...ll be included among the periodic control status information Error is issued when the information shows abnormality Error Decision Conditions If the parameter information shows abnormality it will be...

Page 282: ...PCB Troubleshooting 1 Connector and indoor unit control PCB CHECK 11 Refer to page 380 Is the optional remote sensor is installed Field setting 10 20 2 is set to 03 Connector is connected to the indo...

Page 283: ...y be damaged YES NO Is CC displayed on the remote controller 2 YES NO Does it function normally Remove the humidity sensor from the indoor unit control PCB and insert it again Normal Poor connector co...

Page 284: ...nfrared presence sensor connector CE 01 Defective infrared floor sensor Temperature compensation circuit disconnection CE 02 Defective infrared floor sensor Temperature compensation short circuit CE 0...

Page 285: ...connector correctly Connect the connector correctly NO YES YES Is the connection of the connector on infrared presence sensor PCB and the connector 1 normal NO YES YES Is the connection of the sensor...

Page 286: ...connector correctly Connect the connector correctly NO YES YES Is the connection of the connector on infrared floor sensor PCB and the connector 1 normal NO YES YES Is the connection of the sensor con...

Page 287: ...ress data No 26 Is the connection of the sensor connector normal Displays by the above verification method Displays CE 03 again or for sensor and address data Replace the sensor Connect the connector...

Page 288: ...ress data No 26 Is the connection of the sensor connector normal Displays by the above verification method Displays CE 04 again or for sensor and address data Replace the sensor Connect the connector...

Page 289: ...roubleshooting 1 How to delete the history of error codes Press the ON OFF button for 4 seconds and more while the error code is displayed in the inspection mode Clear the error code history 1 While i...

Page 290: ...between the indoor unit and the outdoor unit are not normal Supposed Causes Defective outdoor unit main PCB A1P Defective connection communication line between indoor and outdoor units Troubleshootin...

Page 291: ...ing YES NO NO Is wiring passing through the current sensor T1A proper Insulation failure of compressor Insulation failure of component except compressor Pass proper wiring through the sensor Turn OFF...

Page 292: ...X101A Wiring disconnection Defective outdoor unit main PCB Troubleshooting NO YES YES Is the system reset to normal Is X101A connected The error is considered to have resulted from external factors o...

Page 293: ...r unit main PCB A1P Momentary power failure Defective high pressure sensor Troubleshooting NO YES YES Replace the high pressure switch S1PH Remedy defective points YES Are the above 3 points OK Does t...

Page 294: ...ctors that cause the high pressure to rise Connect the service checker and then compare the high pressure value measured by the service checker with the voltage measurement of the connector of the pre...

Page 295: ...and then restart the operation Is the stop valve open Open the stop valve Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Replace th...

Page 296: ...ifferential pressure 0 5 MPa 72 5 psi or more UVW connection error Defective inverter PCB Stop valve is not opened Troubleshooting Make proper wire connections Make proper wire connections NO NO NO NO...

Page 297: ...F Pressure equalization failure Check for the refrigerant system Quit work Pressure equalization failure may have occurred Check for the refrigerant system YES YES NO Replace the inverter PCB 1 NO The...

Page 298: ...ystem will return an alarm if there is any operational unit other than that applicable to E6 or determine to be error if not Supposed Causes Defective compressor Defective high pressure sensor Defecti...

Page 299: ...e at its connector block to convert it to pressure CHECK 12 2 208 230 V and 460 V models A3P 575 V models A4P CHECK 4 Refer to page 372 CHECK 12 Refer to page 383 NO YES Are the high pressure and ow p...

Page 300: ...n of harness connector between the fan motor and the PCB Fan does not rotate due to foreign matter caught in it Clearing condition fan motor performs normal operation for a period of 5 minutes Trouble...

Page 301: ...ES Resistance between U V W phases of the fan motor power supply cable has lost balance or short circuit is caused between U V W phases Check for the connector power supply cable of the fan motor NO C...

Page 302: ...Troubleshooting by Error Code SiUS341802EC 295 Part 6 Service Diagnosis Reference Reference CHECK 16 Refer to page 386 CHECK 17 Refer to page 388...

Page 303: ...period of 5 minutes Troubleshooting There are Ioreign matter around the applicable fan Remove the foreign matter YES Check for the connections of all fan motor connectors 1 NO Turn OFF the power supp...

Page 304: ...less than 1 M Replace the relevant fan motor M1F M2F YES NO YES Resistance between U V W phases of the fan motor power supply cable has lost balance or short circuit is caused between U V W phases Che...

Page 305: ...ON again Return to normal Investigate external causes other than failures e g noise YES NO Connector for the electronic expansion valve of the outdoor unit main PCB A1P is connected Properly and secu...

Page 306: ...abnormally high i e 135 C 275 F or more When discharge pipe temperature sharply rises remains at 120 C 248 F or more for a period of consecutive 10 minutes When compressor surface temperature becomes...

Page 307: ...are normal and temperature detection with the outdoor unit main PCB is also normal The discharge pipe temperature or compressor surface temperature has really become high CHECK 3 Eliminate the causes...

Page 308: ...art Error Decision Conditions When the following wet state continues for a period of 90 minutes an alert is issued An error is defined for 120 minutes Wet state in outdoor units When the following wet...

Page 309: ...NO Replace the indoor unit electronic expansion valve Replace the relevant thermistor YES YES Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may b...

Page 310: ...uses Refrigerant overcharged Disconnection of outdoor air thermistor Disconnection of heat exchanger deicer thermistor Disconnection of liquid pipe temperature thermistor Troubleshooting CHECK 11 Refe...

Page 311: ...essor is not running Supposed Causes Defective connection of jumpers between PCB Defective outdoor unit main PCB A1P Defective inverter PCB Troubleshooting 1 208 230 V and 460 V models A3P 575 V model...

Page 312: ...r disconnection of connector Defective inverter PCB A3P Troubleshooting CHECK 17 Refer to page 388 Properly connect the connector NO YES Replace the fan motor M1F M2F NO YES Turn OFF the power supply...

Page 313: ...or NO YES Replace the relevant fan motor M1F M2F NO YES Check for fan PCB applicable to the error code H7 while in monitor mode H7 21 23 25 Fan PCB for M1F Master Slave 1 Slave 2 H7 22 24 26 Fan PCB f...

Page 314: ...wiring disconnection or short circuit in it Supposed Causes Defective connection of thermistor Defective thermistor Defective outdoor unit main PCB Troubleshooting Thermistor is connected to the conn...

Page 315: ...nector Suction pipe thermistor R10T X29A Group connector J6 Heat exchanger deicer thermistor R11T X15A Group connector Heat exchanger gas pipe thermistor R8T R9T X29A Group connector J7 Receiver inlet...

Page 316: ...K 12 Refer to page 383 Are the characteristics of the high pressure sensor normal Make a comparison between voltage characteristics and gauge pressure Replace the high pressure sensor S1NPH Replace th...

Page 317: ...2 Refer to page 383 Check 12 Are the characteristics of the low pressure sensor normal Make a comparison between voltage characteristics and gauge pressure Replace the low pressure sensor S1NPL Replac...

Page 318: ...value during the output of waveform before compressor startup Detect current value with the current sensor during synchronous operation for startup Error Decision Conditions When the overcurrent flow...

Page 319: ...ernal noise or thunder YES Replace the compressor and the inverter PCB 1 together Replace the inverter PCB 1 NO NO YES Replace the inverter PCB 1 and the fan PCB 2 Replace the inverter PCB 1 NO YES Tu...

Page 320: ...cy detection circuit on the outdoor unit main PCB Supposed Causes Defective wiring Defective outdoor unit main PCB Troubleshooting Error recurs after turning OFF the power and ON again Any disconnecti...

Page 321: ...d with the reactor surface thermistor is more than the specified temperature Supposed Causes Defective connection of harness Defective reactor surface thermistor Defective inverter PCB Troubleshooting...

Page 322: ...or Code L4 Sub code 01 03 Method of Error Detection Detect temperature of power module of the inverter PCB Error Decision Conditions Thermistor located inside the power module of the inverter PCB for...

Page 323: ...the error recur Power supply voltage falls within 10 of the rated voltage Replace the inverter PCB 2 Connect to power supply within 10 of the rated voltage NO YES Rectify troubles Normal Power OFF NO...

Page 324: ...posed Causes Radiation fin plate not fixed with screws U0 error Defective fan PCB High outdoor air temperature Troubleshooting Continue operation Field factor Radiation fin temperature may have risen...

Page 325: ...t fixed with screws U0 error Defective diode bridge High outdoor air temperature Troubleshooting Turn ON the power supply and check if the error recurs when operation starts Turn ON the power supply a...

Page 326: ...ive inverter PCB Troubleshooting Power OFF Open the stop valve YES NO Is the stop valve open YES YES Are wiring and wire connections to the relevant compressor normal Rectify the wiring and wire conne...

Page 327: ...ower transistor normal Power OFF YES Restarting the system results in the recurrence of the error Continue operation Replace the compressor NO YES Replace the inverter PCB 1 YES Restarting the system...

Page 328: ...voltage Troubleshooting Power OFF Open the stop valve YES NO Is the stop valve open YES YES Are wiring and wire connections to the relevant compressor normal Rectify the wiring and wire connections NO...

Page 329: ...nd Low pressure before the compressor restart is below 0 2 MPa Continue operation Replace the compressor Connect to power supply within 10 of the rated voltage NO NO Pressure equalization failure Chec...

Page 330: ...oting YES NO NO Apply power and then restart operation NO Are the leads of the compressor disconnected Connect the leads of the compressor YES Is the insulation resistance of the relevant compressor 1...

Page 331: ...compressor and the refrigerant system NO Replace the inverter PCB 1 NO YES NO The internal wiring of the compressor coil is defective Replace the compressor YES Is the insulation resistance of the re...

Page 332: ...utdoor unit main PCB transmission block Defective noise filter compressor or fan motor External factors e g noise Failure of inverter PCB or fan PCB Troubleshooting Does the inverter PCB part No match...

Page 333: ...CB A1P is blinking Properly connect the connector NO YES Is the connector between the outdoor unit main PCB and the sub PCB securely connected Properly connect the connector X9A X10A on the sub PCB op...

Page 334: ...ance through inverter PCB Error Decision Conditions When power supply voltage imbalance exceeds approximately 12 V Error is not decided while the unit operation is continued P1 will be displayed by pr...

Page 335: ...spare part Hand the Notice of Inspection Results to user to ask him her to rectify the imbalance Be sure to explain user that power supply voltage imbalance will occur and Daikin accepts no responsibi...

Page 336: ...Causes Defective connection of thermistor Defective reactor surface thermistor Defective inverter PCB Troubleshooting Disconnect the thermistors from the inverter PCB A3P and check the resistance NO Y...

Page 337: ...continued P4 will be displayed by pressing the inspection button Supposed Causes Defective radiation fin temperature thermistor Defective inverter PCB Defective compressor Defective fan motor Troubles...

Page 338: ...nt to open or short circuit Supposed Causes Defective fan PCB Defective fan motor Troubleshooting 1 208 230 V and 460 V models A4P A5P 575 V models A5P A6P The insulation resistance of the relevant fa...

Page 339: ...o match that of the spare parts list Does the fan PCB part No match that of the spare parts list Has the DIP switch setting been made properly to replace the outdoor unit main PCB Does the Under Prepa...

Page 340: ...to page 368 CHECK 12 Refer to page 383 Is the low pressure 0 1 MPa 14 5 psi or less 1 Is the characteristics of low pressure sensor normal 2 Replace the low pressure sensor S1NPL Replace the outdoor u...

Page 341: ...everse phase are judged Error Decision Conditions When a power supply is reverse phase or T phase is open phase Supposed Causes Power supply reverse phase T phase open phase Defective outdoor unit mai...

Page 342: ...ective outdoor unit main PCB A1P Troubleshooting There is an open phase at the power supply T phase terminal section X1M of the outdoor unit Operation is normal if one phase of power supply line phase...

Page 343: ...ailure Open phase Defective inverter PCB Defective outdoor unit main PCB Defective compressor Defective main circuit wiring Defective fan motor Defective connection of signal cable Troubleshooting The...

Page 344: ...e ON button Replace the inverter PCB 1 If the inverter PCB gets severely damaged the compressor and the fan motor M1F M2F may have been damaged Replace the inverter PCB 1 If the inverter PCB gets seve...

Page 345: ...b code and then go to the following Conduct the test operation The test operation has not been conducted U3 03 Check for the refrigerant piping and then conduct the test operation U3 04 Conduct the te...

Page 346: ...icrocomputer checks if transmission between indoor and outdoor units is normal Error Decision Conditions Transmission is not carried out normally for a certain amount of time Supposed Causes Open phas...

Page 347: ...ON BLINK SEG1 SEG2 SEG3 1 2 Correct the voltage Replace the fuse Press and hold the RETURN BS3 button on the outdoor unit main PCB for a period of 5 seconds or more YES NO YES YES Replace the indoor u...

Page 348: ...ve PCB 2 Test operation was interrupted by the MODE BS1 button YES Check all indoor error indication NO Operate all indoor units YES Do all units display U9 Carry out the diagnosis again after a lapse...

Page 349: ...ain Sub setting Control by 2 remote controllers Main Sub setting of both remote controllers is set to Main All indoor unit control PCB microcomputer normal monitors blinking Resets normally when power...

Page 350: ...nditions When transmission is not carried out normally for a certain amount of time Supposed Causes Connection error of transmission wirings between outdoor unit and external control adaptor for outdo...

Page 351: ...daptor is mounted Error code Sub code Error code Sub code Error code Sub code Error code Sub code Error code Sub code Error code Sub code Error code Sub code Error code Sub code Go to Diagnosis Flowch...

Page 352: ...tdoor unit Diagnosis Flowchart 1 Supply power to the outdoor unit Is power supplied to the outdoor unit Is the normal operation monitor LED on the outdoor unit main PCB blinking Is the normal operatio...

Page 353: ...the error recur when setting Cool Heat selection for the external control adaptor for outdoor unit to IND NO NO NO NO NO NO NO NO YES YES YES YES YES YES YES YES Replace the outdoor unit main PCB A1P...

Page 354: ...smission wirings to multi slave 1 have caused wiring disconnection in them or are being disconnected Modify the outdoor unit multi transmission wirings and then reset the power supply Replace the outd...

Page 355: ...ly Replace the outdoor unit main PCB A1P Replace the outdoor unit main PCB A1P Rectify the error in the connection of transmission wirings and then reset the power supply One of outdoor unit multi tra...

Page 356: ...ror between main and sub remote controller Connection between sub remote controllers Defective remote controller PCB Troubleshooting Refer to page 68 for Main Sub setting Main Sub setting of both remo...

Page 357: ...nits Defective electronic expansion valve of other indoor unit Defective indoor unit control PCB of other indoor unit Improper connection of transmission wiring between indoor and outdoor unit Multi t...

Page 358: ...nt type of indoor and outdoor unit Setting of outdoor unit main PCB was not carried out after replacing to spare PCB Troubleshooting Ensure the sub code or the lamp display of monitor mode and then go...

Page 359: ...efer to Incorrect electric heater capacity setting troubleshooting 1 Excess indoor units are connected Check for the connection to connect the proper number of indoor units NO Diagnosis Flowchart 1 UA...

Page 360: ...Replace the outdoor unit main PCB A1P Was the outdoor unit main PCB replaced with a spare PCB A different model of outdoor unit is connected Diagnosis Flowchart 3 Error code Sub code UA 20 Multi conn...

Page 361: ...system setup Check if system is heat pump or heat recovery Diagnosis Flowchart 5 Is there any branch selector unit connected NO Was the outdoor unit main PCB replaced with a spare PCB Replace the out...

Page 362: ...NO Correct the multi combination of outdoor units Diagnosis Flowchart 6 Is the multi combination of outdoor units proper NO Was the outdoor unit main PCB replaced with a spare PCB Replace the outdoor...

Page 363: ...rnace and other indoor units other than CXTQ TA are connected Error Decision Conditions Check that two or more CXTQ TA gas furnace and other indoor units other than CXTQ TA are not connected Operation...

Page 364: ...a non applicable value Operation After Error Codes Decided The error code UA 17 is displayed on the remote controller Indoor units can operate continuously Incorrect setting is kept Even if the ON co...

Page 365: ...that of its own on any other indoor unit Error Decision Conditions The error decision is made as soon as the abnormality aforementioned is detected Supposed Causes Address duplication of centralized...

Page 366: ...ocomputer checks if transmission between indoor unit and centralized controller is normal Error Decision Conditions When transmission is not carried out normally for a certain amount of time Supposed...

Page 367: ...No for indoor unit changed Make correct setting of the central control group No Check outdoor units to which the refrigerant system is connected Check whether or not there are no problems with the tra...

Page 368: ...e Replace the centralized controller Centralized controller Normal OK Correct the wiring NG A NO Correct the wiring NG YES YES Disconnect the transmission wiring of the main centralized controller and...

Page 369: ...mission wiring between indoor outdoor units and outdoor outdoor units Failure to execute check operation Defective indoor unit PCB Stop valve is not opened Troubleshooting Is indoor outdoor and outdoo...

Page 370: ...ss function Automatic address refers to the automatic designated address of indoor unit and outdoor unit when connected to the power after installation or wiring replacement with the RETURN BS3 button...

Page 371: ...e system NO After fixing the incorrect wiring press the RETURN BS3 button on the outdoor unit main PCB for 5 seconds The unit will not run for up to 12 minutes NO NO Install the DIII NET extension ada...

Page 372: ...f the gas furnace is turned ON after a certain period of time has been elapsed after the power of the CXTQ TA was turned ON Disconnection of the communication wire between the CXTQ TA and the gas furn...

Page 373: ...r communication with the gas furnace completes and after elapsing 4 minutes after the power is turned ON Two or more gas furnaces are detected Any unit other than the gas furnace is detected Supposed...

Page 374: ...denser Mixingofnon condensablegas Decreased airflow rate Decreased fan output Defective fan motor Defective outdoor unit main PCB Including capacity setting High airflow passage resistance Dirty filte...

Page 375: ...ty setting properly made Is the air filter clogged Is there any obstacle in the airflow passage Defective outdoor unit main PCB Including capacity setting High airflow passage resistance Dirty filter...

Page 376: ...Check SiUS341802EC 369 Part 6 Service Diagnosis Reference Reference CHECK 7 Refer to page 378 CHECK 8 Refer to page 379...

Page 377: ...the outdoor unit electronic expansion valve excessively throttled 3 Temperature increase of discharge pipe Defective injection electronic expansion valve Are the coil resistance and insulation normal...

Page 378: ...superheat operation 1 Suction gas superheating degree 10 C 18 F and over 2 Discharge gas superheating degree 45 C 81 F and over except immediately after compressor starts up or is running under dropp...

Page 379: ...point When using the analog type of multimeter make measurement in resistance measurement mode in the x1 k range When using the digital type of multimeter make measurement in diode check mode Judgemen...

Page 380: ...rement in diode check mode Judgement Criteria Remarks Judgement Criteria Remarks 1 P31 U 2 30 k 1 2 V or more Due to condenser charge and so on resistance measurement may require some time 2 P31 V 3 P...

Page 381: ...check mode Judgement Criteria Remarks Judgement Criteria Remarks 1 P21 U 2 30 k 1 2 V or more Due to condenser charge and so on resistance measurement may require some time 2 P21 V 3 P21 W 4 U P21 15...

Page 382: ...check mode Judgement Criteria Remarks Judgement Criteria Remarks 1 P31 U 2 30 k 1 2 V or more Due to condenser charge and so on resistance measurement may require some time 2 P31 V 3 P31 W 4 U P31 15...

Page 383: ...k range When using the digital type of multimeter make measurement in diode check mode Judgement Criteria Remarks Judgement Criteria Remarks 1 P31 U 2 30 k 1 2 V or more Due to condenser charge and s...

Page 384: ...e Low pressure Frequency High pressure gradually rises with increase in frequency Subcooling degree becomes higher Liquid connection pipe temperature lowers Low pressure rises due to decreased compres...

Page 385: ...minimum level Fan control is activated for high pressure protection under cooling control at low outdoor air temperature i e the fan is hunting at high pressure High pressure drops with decrease in c...

Page 386: ...r less for a period of 1 hour or more and then check to be sure that the vacuum gauge reading does not rise If the reading rises moisture may have remained in the system or refrigerant leakage may hav...

Page 387: ...TA FXMQ MF Type B Type J Type J Thermistor Thermistor type R1T Outdoor air thermistor Type E R21T Discharge pipe thermistor Type H R3T Receiver inlet thermistor Type L R4T Heat exchanger liquid pipe...

Page 388: ...7 39 74 15 59 31 44 31 50 31 51 31 41 20 68 24 95 25 02 25 02 24 98 25 77 19 94 20 00 20 00 20 00 30 86 16 04 16 10 16 10 16 12 35 95 12 99 13 04 13 04 13 07 40 104 10 58 10 63 10 63 10 67 45 113 8 66...

Page 389: ...12 99 12 65 40 104 10 74 109 4 10 73 10 58 10 31 45 113 8 806 89 58 8 800 8 669 8 447 50 122 7 260 73 73 7 255 7 143 6 962 55 131 6 014 60 98 6 012 5 918 5 769 60 140 5 008 50 67 5 010 4 928 4 805 65...

Page 390: ...kg cm2 psi MPa PH PL PH MPa VH 0 5 PL MPa VL 0 5 PH High pressure MPa PL Low pressure MPa VH Output Voltage High Side VDC VL Output Voltage Low Side VDC 4 15 3 0 4 15 3 0 1 7 3 0 1 7 3 0 1 MPa 145 ps...

Page 391: ...t D between the outdoor outdoor unit terminal of the outdoor unit C in the order described thus identifying the place with continuity If the place with continuity can be identified there may be broken...

Page 392: ...r continuity If there is continuity the indoor outdoor unit transmission has no broken wires in it Indoor outdoor unit transmission wiring 2 Short circuit between the indoor outdoor unit terminal part...

Page 393: ...n motor connector from the PCB and measure the resistances between U V V W and W U Judgment Resistances must be balanced within 20 FXDQ M FXHQ M 1 Turn OFF the power supply 2 Measure the resistance be...

Page 394: ...ach phase are balanced within a permissible dispersion range of 20 FXMQ TA Measurement of power wire connector Remove the X1A connector from the fan PCB A2P and measure the resistance between the U an...

Page 395: ...more to use a multimeter for measurement connect the probe of negative pole to Vcc and that of positive pole to GND Indoor Unit FXFQ T FXFQ09 30P FXZQ TA FXZQ TB FXUQ P FXSQ05 48TA FXSQ05 48TB FXMQ07...

Page 396: ...or more 8 5 1 or more Measuring points Judgment criteria 5 4 1 or more 5 3 1 or more 5 2 1 or more 5 1 1 or more Measuring points Judgment criteria 5 4 1 or more 5 3 1 or more 5 2 1 or more 5 1 1 or...

Page 397: ...ue is within the range listed in the table below Determine the type according to the connector wire color and measure the resistance Outdoor Unit Y1E Y3E Y4E Y2E Y5E Measuring points Judgment criteria...

Page 398: ...Q P FXZQ TA FXZQ TB FXUQ P FXUQ PA FXEQ P FXSQ TA FXSQ TB FXMQ TB FXTQ TA FXTQ TB CXTQ TA Measuring points Judgment criteria 1 5 120 180 2 5 3 5 4 5 White 1 Yellow 2 Orange 3 Blue 4 Red 5 Measuring po...

Page 399: ...0 1 5 150 2 4 300 2 6 150 Measuring points Judgment criteria 1 3 300 1 5 150 2 4 300 2 6 150 Measuring points Judgment criteria 1 2 No continuity 1 3 300 1 6 150 2 4 300 2 6 150 White 1 Yellow 2 Orang...

Page 400: ...rs Repair or replace as needed 4 Check blower wheel Confirm wheel is properly seated on motor shaft Set screw must be on shaft flat and torqued to 165 in lbs minimum Confirm wheel has no broken or loo...

Page 401: ...ce motor control end bell verify motor refer to Motor Checks on page 396 9 Depress the orange power button to turn off motor 10 Disconnect power Disconnect diagnostic tool 11 Reconnect the 4 wire harn...

Page 402: ...to air handler or modular blower NOTE Motor contains capacitors that can hold a charge for several minutes after disconnecting power Wait 5 minutes after removing power to allow capacitors to discharg...

Page 403: ...or modular blower 1 Disconnect power to air handler or modular blower NOTE Motor contains capacitors that can hold a charge for several minutes after disconnecting power Wait 5 minutes after removing...

Page 404: ...SiUS341802EC 397 Part 7 Appendix 1 Wiring Diagrams 398 1 1 Outdoor Unit 398 1 2 Indoor Unit 408 1 3 Air Treatment Equipment 432 Part 7 Appendix...

Page 405: ...SiUS341802EC Wiring Diagrams Part 7 Appendix 398 1 Wiring Diagrams 1 1 Outdoor Unit RXLQ72TATJU RXLQ72TATJA 2D112580C...

Page 406: ...SION VALVE REFRIGERAT COOLING Y6E ELECTRIC EXPANSION VALVE LEAK DETECTION Y7E ELECTRIC EXPANSION VALVE RECEIVER GAS PURGE Y1S SOLENOID VALVE OS OIL RETURN 1 Y2S SOLENOID VALVE HOT GAS BYPASS Y3S SOLEN...

Page 407: ...SiUS341802EC Wiring Diagrams Part 7 Appendix 400 RXLQ96 120TATJU RXLQ96 120TATJA 2D112581C...

Page 408: ...AS PURGE Y1S SOLENOID VALVE OS OIL RETURN 1 Y2S SOLENOID VALVE HOT GAS BYPASS Y3S SOLENOID VALVE LIQUID SHUT OFF Y4S 4WAY VALVE HP LP GAS Y5S 4WAY VALVE HEAT EXC LOWER Y6S 4WAY VALVE HEAT EXC UPPER Y7...

Page 409: ...SiUS341802EC Wiring Diagrams Part 7 Appendix 402 RXLQ72TAYDU RXLQ72TAYDA 2D112582D...

Page 410: ...LEAK DETECTION Y7E ELECTRIC EXPANSION VALVE RECEIVER GAS PURGE Y1S SOLENOID VALVE OS OIL RETURN 1 Y2S SOLENOID VALVE HOT GAS BYPASS Y3S SOLENOID VALVE LIQUID SHUT OFF Y4S 4WAY VALVE HP LP GAS Y5S 4WA...

Page 411: ...SiUS341802EC Wiring Diagrams Part 7 Appendix 404 RXLQ96 120TAYDU RXLQ96 120TAYDA 2D112583D...

Page 412: ...ELECTRIC EXPANSION VALVE RECEIVER GAS PURGE Y1S SOLENOID VALVE OS OIL RETURN 1 Y2S SOLENOID VALVE HOT GAS BYPASS Y3S SOLENOID VALVE LIQUID SHUT OFF Y4S 4WAY VALVE HP LP GAS Y5S 4WAY VALVE HEAT EXC LO...

Page 413: ...SiUS341802EC Wiring Diagrams Part 7 Appendix 406 RXLQ72 96 120TAYCU RXLQ72 96 120TAYCA RXYQ72 96 120 144 168TAYCU RXYQ72 96 120 144 168TAYCA 2D112579C...

Page 414: ...RMINAL BLOCK POWER SUPPLY X1M TERMINAL BLOCK CONTROL A1P X1M TERMINAL BLOCK ABC I P A8P Y1E ELECTRIC EXPANSION VALVE HEAT EXC UPPER Y3E ELECTRIC EXPANSION VALVE HEAT EXC LOWER Y4E ELECTRIC EXPANSION V...

Page 415: ...725 855 17 6 1625 32 5 02 8 211 725 3725 25 5 1 211 725 32 5 6833 25 3725 211 725 25 237 21 6625 211 725 3725 25 08 7 7 1 17 5 7 5 7 7 127 7 50 1 2 211 725 5 1 3527 7 9 5281 12 6 66 5281 1 6 2 86 1 17...

Page 416: ...3 3 6 5 21 7 21 5 5811 1 7 1 0 6 6 867 6 1625 81 7 6 1250 6 257 6 1 1 7 21 81 7 7 7 5 1 1 5811 1 6 1 0 3 02725 03 5 386 87721 5 6 7 2 1250 7 1 7 21 386 87721 7 5 872 1 1 7 67 1 725 03 5 1 6 2 0 7 0 77...

Page 417: ...SiUS341802EC Wiring Diagrams Part 7 Appendix 410 FXFQ07 09 12 15 18 24 30 36 48TVJU 3D086460B...

Page 418: ...Wiring Diagrams SiUS341802EC 411 Part 7 Appendix BYCQ125BGW1 Self Cleaning Decoration Panel for FXFQ T 3D076375A...

Page 419: ...50V LIGHT EMITTING DIODE SERVICE MONITOR GREEN MAGNETIC RELAY M1P MOTOR INDOOR FAN MOTOR DRAIN PUMP MOTOR SWING FLAP THERMISTOR AIR THERMISTOR COIL LIQUID THERMISTOR COIL GAS FLOAT SWITCH DIODE BRIDGE...

Page 420: ...Wiring Diagrams SiUS341802EC 413 Part 7 Appendix FXZQ05 07 09 12 15 18TAVJU 3D110443A...

Page 421: ...5 6 1 5 6 725 6 7 0 1 68 6 725 6 7 5 66 5 66 6 7 35 17 5 8 7 2 5 35 17 5 8 7 2 5 35 17 5 8 7 2 5 211 725 5 66 5 027 21752 5 211 725 3725 25 5 1 211 725 32 5 6833 25 3725 211 725 6 1625 7 32 5 6833 9 9...

Page 422: ...RMISTOR COIL LIQUID THERMISTOR COIL GAS FLOAT SWITCH TRANSFORMER 208 230V 25V TRIAC TERMINAL BLOCK TERMINAL BLOCK ELECTRONIC EXPANSION VALVE WIRELESS REMOTE CONTROLLER RECEIVER DISPLAY UNIT PRINTED CI...

Page 423: ...NG CENTRAL REMOTE CONTROLLER CONNECT IT TO THE UNIT IN ACCORDANCE WITH THE ATTACHED INSTALLATION MANUAL 3 IN CASE OF MAIN SUB CHANGEOVER SEE THE INSTALLATION MANUAL ATTACHED TO REMOTE CONTROLLER 4 SYM...

Page 424: ...0 7 50 1 2 21752 5 6 1 03 55 7 25 5 7 5 7 8 3 06 02725 1 225 1 7 50 6725 5 127 3 35 17 5 8 7 2 5 7 7 50 1 2 32 5 6833 02725 5 1 3803 3 0 6 7 0 6 0 6 8 5 7 06 32 5 6833 9 7 50 6725 2 5 5 027 21752 5 23...

Page 425: ...SiUS341802EC Wiring Diagrams Part 7 Appendix 418 FXEQ07 09 12 15 18 24PVJU 3D098557A...

Page 426: ...Wiring Diagrams SiUS341802EC 419 Part 7 Appendix FXDQ07 09 12 18 24MVJU C 3D050501C...

Page 427: ...SiUS341802EC Wiring Diagrams Part 7 Appendix 420 FXSQ05 07 09 12 15 18 24 30 36 48 54TAVJU C 3D110467C...

Page 428: ...8 77 72 5 027 21752 5 2 256 5 5 8 8 7 7 2 25 25 1 51 5 1 51 52 1 5 5 31 3 1 127 6 7 50 1 2 211 725 5 1 3527 7 9 5281 6 5 12 6 66 5281 1 6 86 1 175 5 027 21752 5 211 7 7 72 7 81 7 1 25 1 7 7 77 167 7 2...

Page 429: ...SiUS341802EC Wiring Diagrams Part 7 Appendix 422 FXMQ07 09 12 15 18 24 30 36 48 54PBVJU 3D093209B...

Page 430: ...2 5 027 21752 5 2 256 5 5 8 8 7 7 2 25 25 1 51 5 1 51 52 1 5 5 31 3 1 127 6 7 50 1 2 211 725 5 1 3527 7 9 5281 6 5 12 6 66 5281 1 6 86 1 175 5 027 21752 5 211 7 7 72 7 81 7 1 25 1 7 7 77 167 7 21 0 18...

Page 431: ...DIAGRAM OF THIS ACCESSORY 3 CAN BE USED FOR FIRE ALARM INPUT ONLY SEE INSTALLATION MANUAL FOR MORE INFORMATION 4 X15A X25A ARE CONNECTED WHEN THE DRAIN PUMP KIT IS BEING USED BEFORE INSTALLING OF DRA...

Page 432: ...INAL 2 FIELD WIRING 3 IN CASE USING CENTRAL REMOTE CONTROLLER CONNECT IT TO THE UNIT IN ACCORDANCE WITH THE ATTACHED INSTALLATION MANUAL 4 WHEN CONNECTING THE INPUT WIRES FROM OUTSIDE FORCED OFF OR ON...

Page 433: ...SiUS341802EC Wiring Diagrams Part 7 Appendix 426 FXHQ12 24 36MVJU 3D048116C...

Page 434: ...Wiring Diagrams SiUS341802EC 427 Part 7 Appendix FXAQ07 09 12 18 24PVJU 3D075354F...

Page 435: ...ONNECT IT TO THE UNIT IN ACCORDANCE WITH THE ATTACHED INSTALLATION MANUAL 4 WHEN CONNECTING THE INPUT WIRES FROM OUTSIDE FORCED OFF OR ON OFF CONTROL OPERATION CAN BE SELECTED BY REMOTE CONTROLLER IN...

Page 436: ...FIELD HIGH VOLTAGE HIGH VOLTAGE FIELD JUNCTION TERMINAL PLUG CONNECTION EQUIPMENT GND FIELD GROUND 0140A01285 A X1A X3A X38A BS1 X12A X13A HAP X8A INDOOR UNIT PCB THERMISTOR HEAT EXCHANGER 1 2 MPU MU...

Page 437: ...OW VOLTAGE LOW VOLTAGE FIELD HIGH VOLTAGE HIGH VOLTAGE FIELD JUNCTION TERMINAL PLUG CONNECTION EQUIPMENT GND FIELD GROUND 0140A01387 A X1A X3A X38A BS1 X12A X13A HAP X8A INDOOR UNIT PCB THERMISTOR HEA...

Page 438: ...CTION TERMINAL PLUG CONNECTION EQUIPMENT GND FIELD GROUND X3A X38A BS1 X12A X13A HAP X8A INDOOR UNIT PCB THERMISTOR HEAT EXCHANGER 1 2 MPU EEV COIL M K3R TB6 TB8 LEARN PS TB5 TB4 ACC OUT RELAY OUT FLA...

Page 439: ...SiUS341802EC Wiring Diagrams Part 7 Appendix 432 1 3 Air Treatment Equipment 1 3 1 Outdoor Air Processing Unit FXMQ48 72 96MFVJU 3D065426D...

Page 440: ...Wiring Diagrams SiUS341802EC 433 Part 7 Appendix 1 3 2 Energy Recovery Ventilator VAM Series VAM300 470 600GVJU 3D073269D...

Page 441: ...SiUS341802EC Wiring Diagrams Part 7 Appendix 434 VAM1200GVJU 3D073270D...

Page 442: ...local legislation z Ask a qualified installer or contractor to install this product Do not try to install the product yourself Improper installation can result in water or refrigerant leakage electric...

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