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Daikin VRV RXYQ72-384XAYCA, Service Manual


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Troubleshooting by Error Code

SiUS342004EB

329

Part 6 Service Diagnosis

3.62  Transmission Error between Indoor Units and Outdoor 

Units, Open Phase in Power Supply Wiring

Applicable 

Models

All indoor unit models

All outdoor unit models

Error Code

U4

Method of Error 

Detection

Microcomputer 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 phase in power supply wiring

Short circuit in indoor-outdoor or outdoor-outdoor transmission wiring (F1/F2), or wrong wiring

Outdoor unit power supply is OFF

System address does not match

Defective indoor unit control PCB

Defective outdoor unit main PCB

Multi-tenant function is ON.

Summary of Contents for VRV RXYQ72-384XAYCA

Page 1: ...Service Manual RXYQ72 384XAYCA RXYQ72 384XBYCA Heat Pump 60 Hz SiUS342004EB...

Page 2: ...atio 17 4 2 Outdoor Unit Combinations 17 5 Specifications 18 Part 2 Refrigerant Circuit 32 1 Refrigerant Circuit Piping Diagrams 33 1 1 Outdoor Unit 33 1 2 Indoor Unit 37 1 3 Indoor Low Temperature Hy...

Page 3: ...rt Standby 84 3 2 Crankcase Heater Control 84 4 Startup Control 85 4 1 Startup Control in Cooling 85 4 2 Startup Control in Heating 86 5 Basic Control 87 5 1 Normal Control 87 5 2 Compressor PI Contro...

Page 4: ...Settings for Indoor Unit 133 1 1 Field Settings with Remote Controller 133 1 2 List of Field Settings for Indoor Unit 140 1 3 Detailed Explanation of Setting Modes 146 1 4 Field Settings of Low Temper...

Page 5: ...1 3 17 Drain Level above Limit 252 3 18 Self Cleaning Decoration Panel Abnormality 253 3 19 Defective Capacity Setting 264 3 20 Transmission Abnormality between Indoor Unit Control PCB and Fan PCB 265...

Page 6: ...n Indoor Units and Outdoor Units Open Phase in Power Supply Wiring 329 3 63 Transmission Error between Remote Controller and Indoor Unit 332 3 64 Transmission Error between Outdoor Units 333 3 65 Tran...

Page 7: ...res 370 4 11 Fan Motor Connector Check Power Supply Cable 372 4 12 Fan Motor Connector Check Signal Cable 374 4 13 Electronic Expansion Valve Coil Check 376 4 14 Fan Motor Connector Check for FXTQ TA...

Page 8: ...S342004EB 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: ...t The use of materials for other refrigerant models may cause a serious accident such as damage to the refrigerant cycle or equipment failure Do not mix air or gas other than the specified refrigerant...

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: ...ake 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 When...

Page 13: ...nce is 1 M or greater 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: ...Revised contents 11 2019 SiUS342004E First edition 03 2021 SiUS342004EA Model addition HXY48TAVJU BRC1H71W 01 2024 SiUS342004EB Model addition RXYQ72 384XBYCA FXFQ07 54AAVJU FXZQ05 18TBVJU FXUQ18 36P...

Page 16: ...nit 11 1 3 Air Treatment Equipment 12 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 4 Capacity Range 17 4 1 Connectio...

Page 17: ...RXYQ96XAYCA RXYQ120XAYCA RXYQ120XAYCA RXYQ144XAYCA Outdoor unit 2 RXYQ96XAYCA RXYQ120XAYCA RXYQ120XAYCA RXYQ144XAYCA RXYQ144XAYCA Model name RXYQ312XAYCA RXYQ336XAYCA RXYQ360XAYCA RXYQ384XAYCA Outdoo...

Page 18: ...Slim ceilingmounted 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 Cei...

Page 19: ...Treatment Equipment VJ 1 phase 208 230 V 60 Hz U Standard symbol Outdoor Air Processing Unit Series Model name Power supply Standard FXMQ 48MF 72MF 96MF VJU Energy Recovery Ventilator VAM series Serie...

Page 20: ...Outdoor Unit Single Outdoor Unit Double Outdoor Unit Triple Outdoor Unit 6 8 10 12 14 ton RXYQ72 96 120 144 168XAYCA RXYQ72 96 120 144 168XBYCA 16 18 20 22 24 26 28 ton RXYQ192 216 240 264 288 312 33...

Page 21: ...Shown with BYCQ125B W1 Ceiling mounted duct type High static pressure FXMQ TB VISTATM 2 2 cassette type FXZQ TA FXZQ TB Ceiling mounted duct type FXMQ TA 4 way blow ceiling suspended type FXUQ P FXUQ...

Page 22: ...l Information 2 3 Air Treatment Equipment Concealed floor standing type FXNQ M Cased coil unit CXTQ TA Air handling unit FXTQ TA FXTQ TB Low temperature hydrobox HXY TA Outdoor air processing unit FXM...

Page 23: ...4XA RXYQ144XB 12 15 0 1 h RXYQ168XA RXYQ168XB 14 17 5 1 h RXYQ192XA RXYQ192XB 16 20 0 2 hh BHFP22P100U BHFP22P100UA RXYQ216XA RXYQ216XB 18 22 5 2 h h RXYQ240XA RXYQ240XB 20 25 0 2 hh RXYQ264XA RXYQ264...

Page 24: ...XMQ MF must not exceed 30 of the capacity index of the outdoor units And the connection ratio must not exceed 100 Regarding the combinations related to the low temperature hydrobox HXY TA refer to the...

Page 25: ...as pipe in mm 3 4 19 1 C1220T Brazing connection Weight lbs kg 727 330 Sound Pressure Level Reference Data dB A 58 63 5 3 Sound Power Level Reference Data dB 79 Safety Devices High pressure switch Fan...

Page 26: ...in mm 7 8 22 2 C1220T Brazing connection Weight lbs kg 727 330 Sound Pressure Level Reference Data dB A 61 64 5 3 Sound Power Level Reference Data dB 80 Safety Devices High pressure switch Fan driver...

Page 27: ...Gas pipe in mm 1 1 8 28 6 C1220T Brazing connection Weight lbs kg 727 330 Sound Pressure Level Reference Data dB A 61 65 3 Sound Power Level Reference Data dB 80 5 Safety Devices High pressure switch...

Page 28: ...pipe in mm 1 1 8 28 6 C1220T Brazing connection Weight lbs kg 793 360 Sound Pressure Level Reference Data dB A 65 Sound Power Level Reference Data dB 87 Safety Devices High pressure switch Fan driver...

Page 29: ...ction Gas pipe in mm 1 1 8 28 6 C1220T Brazing connection Weight lbs kg 793 360 Sound Pressure Level Reference Data dB A 65 65 5 3 Sound Power Level Reference Data dB 88 Safety Devices High pressure s...

Page 30: ...ive Connecting pipes Liquid pipe in mm 5 8 15 9 C1220T Brazing connection Gas pipe in mm 1 1 8 28 6 C1220T Brazing connection Weight lbs kg 727 727 330 330 Sound Pressure Level Reference Data dB A 64...

Page 31: ...rive Connecting pipes Liquid pipe in mm 5 8 15 9 C1220T Brazing connection Gas pipe in mm 1 1 8 28 6 C1220T Brazing connection Weight lbs kg 727 727 330 330 Sound Pressure Level Reference Data dB A 64...

Page 32: ...Direct drive Connecting pipes Liquid pipe in mm 5 8 15 9 C1220T Brazing connection Gas pipe in mm 1 3 8 34 9 C1220T Brazing connection Weight lbs kg 727 727 330 330 Sound Pressure Level Reference Data...

Page 33: ...ve Connecting pipes Liquid pipe in mm 3 4 19 1 C1220T Brazing connection Gas pipe in mm 1 3 8 34 9 C1220T Brazing connection Weight lbs kg 727 793 330 360 Sound Pressure Level Reference Data dB A 66 5...

Page 34: ...ive Direct drive Connecting pipes Liquid pipe in mm 4 19 1 C1220T Brazing connection Gas pipe in mm 1 3 8 34 9 C1220T Brazing connection Weight lbs kg 793 793 360 360 Sound Pressure Level Reference Da...

Page 35: ...drive Connecting pipes Liquid pipe in mm 3 4 19 1 C1220T Brazing connection Gas pipe in mm 1 3 8 34 9 C1220T Brazing connection Weight lbs kg 793 793 360 360 Sound Pressure Level Reference Data dB A 6...

Page 36: ...ecting pipes Liquid pipe in mm 3 4 19 1 C1220T Brazing connection Gas pipe in mm 1 3 8 34 9 C1220T Brazing connection Weight lbs kg 793 793 360 360 Sound Pressure Level Reference Data dB A 68 68 5 3 S...

Page 37: ...ow rate cfm m min 7 989 7 989 7 989 226 226 226 Drive Direct drive Connecting pipes Liquid pipe in mm 3 4 19 1 C1220T Brazing connection Gas pipe in mm 1 5 8 41 3 C1220T Brazing connection Weight lbs...

Page 38: ...rate cfm m min 7 989 7 989 9 480 226 226 268 Drive Direct drive Connecting pipes Liquid pipe in mm 3 4 19 1 C1220T Brazing connection Gas pipe in mm 1 5 8 41 3 C1220T Brazing connection Weight lbs kg...

Page 39: ...e Hydrobox 40 1 4 Outdoor Air Processing Unit 41 2 Functional Parts Layout 42 2 1 RXYQ72 120XA RXYQ72 120XB 42 2 2 RXYQ144 168XA RXYQ144 168XB 44 3 Refrigerant Flow for Each Operation Mode 46 3 1 Cool...

Page 40: ...Heat exchanger lower Used to switch outdoor heat exchanger to evaporator or condenser 14 Y6S Four way valve Heat exchanger upper 15 Y7S Solenoid valve Accumulator oil return Used to return oil from t...

Page 41: ...ermistor Receiver gas purge Used to detect gas pipe temperature of receiver gas purge piping 35 R14T Thermistor M1C body Detects compressor surface temperature this switch is activated at surface temp...

Page 42: ...6 120XAYCA RXYQ72 96 120XBYCA C 3D122252 28 R7T 36 R16T 29 R8T 25 R4T 24 R3T 26 R5T 30 R9T 32 R11T 10 Y2S 22 R1T 4 Y2E 8 Y7E 11 Y3S 19 14 Y6S 16 6 Y4E 15 Y7S 9 Y1S 21 13 Y5S 2 M1F M2F 3 Y1E 5 Y3E 7 Y5...

Page 43: ...4 168XAYCA RXYQ144 168XBYCA C 3D122253 28 R7T 36 R16T 29 R8T 25 R4T 24 R3T 26 R5T 30 R9T 32 R11T 10 Y2S 22 R1T 4 Y2E 8 Y7E 11 Y3S 19 14 Y6S 16 6 Y4E 15 Y7S 9 Y1S 21 13 Y5S 2 M1F M2F 3 Y1E 5 Y3E 7 Y5E...

Page 44: ...Used 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...

Page 45: ...46 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 FKDQJHU LTXLG SLSH FRQQHFWLRQ SRUW LOWHU DQ OHFWURQLF H SDQVLRQ YDOYH...

Page 46: ...nt Circuit Piping Diagrams SiUS342004EB 39 Part 2 Refrigerant Circuit FXTQ TA FXTQ TB CXTQ TA C 4D068194 4 1 3 Indoor heat exchanger Filter Filter 4 1 3 Gas piping connection port Liquid piping connec...

Page 47: ...ipe R3T Detects the liquid pipe temperature of the plate type heat exchanger It is used to judge the freeze up prevention control in cooling operation 7 Thermistor refrigerant gas pipe R4T Detects the...

Page 48: ...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 49: ...turn Y1S Solenoid valve Hot gas bypass Y2S Solenoid valve Liquid shutoff Y3S High pressure sensor S1NPH Section W W Thermistor Heat exchanger gas lower R9T Thermistor Suction R10T Fan motor M2F Thermi...

Page 50: ...T Electronic expansion valve Receiver gas purge Y7E Thermistor Heat exchanger liquid upper R4T Thermistor Heat exchanger liquid lower R5T Thermistor Subcooling gas R6T Part B detail Electronic expansi...

Page 51: ...return Y1S Solenoid valve Hot gas bypass Y2S Solenoid valve Liquid shutoff Y3S High pressure sensor S1NPH Section W W Thermistor Heat exchanger gas lower R9T Thermistor Suction R10T Fan motor M2F Low...

Page 52: ...T Electronic expansion valve Receiver gas purge Y7E Thermistor Heat exchanger liquid upper R4T Thermistor Heat exchanger liquid lower R5T Thermistor Subcooling gas R6T Part B detail Electronic expansi...

Page 53: ...ling Operation High temperature high pressure gas High temperature high pressure liquid Low temperature low pressure gas Low temperature low pressure liquid OFF Fan OFF Cooling Unit Thermostat OFF Coo...

Page 54: ...high pressure gas High temperature high pressure liquid Low temperature low pressure gas Low temperature low pressure liquid Indoor Unit Thermostat OFF OFF Fan OFF Heating Unit Heating Unit ON 192 pu...

Page 55: ...emperature high pressure gas High temperature high pressure liquid Low temperature low pressure gas Low temperature low pressure liquid C 3D122252 C 3D122253 Liquid pipe Gas pipe Indoor Unit Thermosta...

Page 56: ...h pressure gas High temperature high pressure liquid Low temperature low pressure gas Low temperature low pressure liquid C 3D122252 C 3D122253 Liquid pipe Gas pipe Indoor Unit Indoor Unit Indoor Unit...

Page 57: ...RC1H71W 66 3 3 When Wireless Remote Controller is Used Together 68 4 Address Setting for Wireless Remote Controller 69 5 Centralized Control Group No Setting 71 5 1 BRC1E73 71 5 2 BRC1H71W 73 5 3 Wire...

Page 58: ...vigation Madoka FXFQ AA BRC1E73 BRC1H71W FXFQ T FXZQ TA BRC082A42W for BYFQ60C3W1W BRC082A42S for BYFQ60C3W1S BRC082A41W for BYFQ60B3W1 FXZQ TB BRC082A42W for BYFQ60C3W2W BRC082A41W for BYFQ60B3W1 FXU...

Page 59: ...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 60: ...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 61: ...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 62: ...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 63: ...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 64: ...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 65: ...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 66: ...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 67: ...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 68: ...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 69: ...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 70: ...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 71: ...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 72: ...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 73: ...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 74: ...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 75: ...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 76: ...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 77: ...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 78: ...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 79: ...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 80: ...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 81: ...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 82: ...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 83: ...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 84: ...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 85: ...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 86: ...Administrator Menu Installer Menu SiUS342004EB 79 Part 3 Remote Controller 7 Administrator Menu Installer Menu 7 1 BRC1H71W Refer to page 57 for details...

Page 87: ...xpansion Valve PI Control 92 5 6 Step Control of Outdoor Fans 93 6 Protection Control 94 6 1 High Pressure Protection Control 94 6 2 Low Pressure Protection Control 96 6 3 Discharge Pipe Protection Co...

Page 88: ...eating Operation Only 122 9 10 Louver Control for Preventing Ceiling Dirt 123 9 11 Heater Control Except FXTQ TA FXTQ TB Models 124 9 12 Heater Control FXTQ TA FXTQ TB Models 125 9 13 Gas Furnace Cont...

Page 89: ...art standby 2 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 Compres...

Page 90: ...hes certain number Refer to Error Codes and Descriptions on page 217 of the troubleshooting for the items to determine the error 2 2 When System is in Stop Control The four way valves retain the condi...

Page 91: ...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 92: ...simultaneously to position the four way valve 4 1 Startup Control in Cooling Refer to page 93 for Step X DSH Discharge pipe superheating degree Pc High pressure sensor detection value Pe Low pressure...

Page 93: ...value 0 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...

Page 94: ...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 95: ...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 96: ...ssor 1 In the case of combination of triple outdoor 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...

Page 97: ...74 44 0 134 101 3 15 19 0 75 44 6 135 102 7 16 19 4 76 45 2 136 104 2 17 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...

Page 98: ...4 142 74 5 23 18 6 83 32 8 143 75 6 24 18 7 84 33 3 144 76 6 25 18 8 85 33 7 145 77 7 26 18 9 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...

Page 99: ...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 100: ...332 362 332 362 25 345 375 345 375 26 358 388 358 388 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 4...

Page 101: ...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 102: ...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 103: ...p 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 se...

Page 104: ...p 1 After 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 pip...

Page 105: ...e case of multi outdoor unit system each compressor performs these controls in the following sequence Inverter Overcurrent Protection Control This control is performed for each compressor Normal contr...

Page 106: ...llowing control of integrated as well as multi units for each compressor Condition All outdoor units A more than 90 C 194 F B less than 87 C 188 6 F C more than 95 C 203 F Normal control Fin temperatu...

Page 107: ...re detected by thermistor R3T Part name Electric symbol Function of functional part Normal cooling Normal heating Compressor M1C 24 rps 37 rps 24 rps 37 rps Fan motor M1F M2F For heat exchanger mode F...

Page 108: ...Refrigerant cooling Y5E Same as normal control Electronic expansion valve Receiver gas purge Y7E 0 pulse Solenoid valve Oil separator oil return Y1S ON Solenoid valve Hot gas bypass Y2S Same as normal...

Page 109: ...Receiver gas purge Y7E 0 pulse Solenoid valve Oil separator oil return Y1S ON Solenoid valve Hot gas bypass Y2S OFF Solenoid valve Liquid pipe Y3S ON Four way valve HP LP gas pipe Y4S Hold Four way v...

Page 110: ...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 111: ...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 112: ...Option OFF ON MF MF OFF MP Drain pump kit MP Drain pump 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...

Page 113: ...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 114: ...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 Humidifier OFF ON Humidifier ON OFF Humidifier OFF OF...

Page 115: ...operation 12 Fan According to fan speed 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 O...

Page 116: ...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 117: ...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 118: ...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 119: ...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 120: ...CXTQ TA 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 T...

Page 121: ...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 122: ...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 123: ...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 124: ...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 125: ...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 126: ...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 127: ...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 same a...

Page 128: ...ntal 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 Swing...

Page 129: ...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 130: ...nd FXEQ P models Factory setting FXFQ AA FXFQ T models draft prevention position FXZQ TA FXZQ TB FXEQ P models standard position P0 P1 P2 P4 P3 P0 P1 P2 P4 P3 P0 P0 P1 P2 P4 P4 P2 P1 P0 P4 P4 P3 P2 P1...

Page 131: ...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 132: ...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 133: ...1 4 OR Not 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 Heate...

Page 134: ...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 135: ...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 136: ...ters refer to page 149 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 137: ...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 138: ...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 139: ...Field Settings for Outdoor Unit 168 2 1 DIP Switch Setting when Mounting a Spare PCB 168 2 2 Accessing the BS Buttons on the PCB 170 2 3 Operating the BS Buttons and DIP Switches on the PCB 171 2 4 C...

Page 140: ...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 141: ...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 142: ...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 143: ...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 144: ...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 145: ...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 146: ...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 147: ...off 2 Auxiliary electric heater OFF temperature Toff 3 Setting of airflow rate when heating Standard Slightly increased Increased 150 3 Electric heater setting Refer to page on the right for details 1...

Page 148: ...r to page on the right for details 158 6 External static pressure settings Refer to page on the right for details 159 14 24 4 Optional kit setting UV lamp humidifier economizer Refer to page on the ri...

Page 149: ...h h h h 11 21 1 Auxiliary electric heater ON temperature h h h h h h 1 Auxiliary electric heater ON OFF temperature h h 2 Auxiliary electric heater OFF temperature h h h h h h 3 Setting of airflow ra...

Page 150: ...zer 5 Dry mode set temperature 9 Mold proof operation setting h 11 Gas furnace test mode 15 25 0 Drain pump operation setting h 1 Humidification when heating thermostat is OFF h h h h h h h h h 2 Dire...

Page 151: ...c heater OFF temperature 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 8 C...

Page 152: ...nd humidifier interlock selection h h h h h h 5 Individual ventilation setting 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 1c 0 Room temperature display h h h...

Page 153: ...for the Second Code No is 02 Factory setting 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...

Page 154: ...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 155: ...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 156: ...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 157: ...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 158: ...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 159: ...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 160: ...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 161: ...emote controller 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...

Page 162: ...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 163: ...For High ceiling 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...

Page 164: ...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 10 1...

Page 165: ...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 3 26 Setting of Static Pressure Sele...

Page 166: ...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 167: ...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 168: ...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 169: ...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 170: ...is possible to change whether or not the room temperature is displayed for the detailed display screen Factory setting 1 3 39 Thermistor Sensor for Auto Changeover and Setback Control by the Remote Co...

Page 171: ...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 172: ...e heat pump might be longer Factory setting Purpose Function Position Modulating 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...

Page 173: ...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 174: ...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 175: ...ad the configuration to the system 2 1 DIP Switch Setting when Mounting a Spare PCB After replacement with spare PCB be sure to make settings shown in the table on the following page The procedure for...

Page 176: ...4 DIP 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...

Page 177: ...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 178: ...setting is explained Initialization Default Situation 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 a...

Page 179: ...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 180: ...e segment indication is as during normal operation default situation when shipped from factory Press the MODE BS1 button for over 5 seconds result segment display Press the SET BS2 button 18 times res...

Page 181: ...oor Unit Connection of the optional PC configurator cable to the outdoor unit has to be done on A1P Connect the 999482P3 cable to the 5 pin blue connector X27A Works executed on the outdoor unit are b...

Page 182: ...e restrictions 1 unit is currently operating under low noise restrictions Night time low noise operation reduces the sound generated by the unit compared to nominal operating conditions Night time low...

Page 183: ...error code When the latest error codes were reset by accident on an indoor unit user interface they can be checked again through this monitoring settings 1 40 shows the current cooling comfort setting...

Page 184: ...erature for heating operation 2 0 9 Auto 41 C 105 8 F 43 C 109 4 F 46 C 114 8 F 0 1 3 6 12 External low noise setting demand setting Used to receive external low noise or demand signal 2 1 2 Input LNO...

Page 185: ...0 1 2 34 Indoor fan tap setting Indoor fan speed is limited to L tap depending on connection capacity and outdoor air temperature Ta Indoor condition A Temperature difference average of indoor air tem...

Page 186: ...0 m 164 ft above indoor Height difference setting max 90 m 295 ft 2 4 9 Off max 50 m 164 ft On max 90 m 295 ft 0 1 51 Sequence multi outdoor Sequence addressing between master and slave units 2 5 1 Au...

Page 187: ...L M H 0 1 2 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 2...

Page 188: ...are connected in multiple system combination 2 Slave unit for Cool Heat operation when outdoor units are connected in multiple system combination Change 2 0 to 0 1 or 2 in function of required functi...

Page 189: ...can be made to check which units are missing in the communication if the number of indoor units do not correspond to the system lay out Ensure that after cross wiring check was confirmed to return se...

Page 190: ...atic pressure the outdoor fan is delivering this setting should be activated For details about this setting see technical specifications Default value 0 To activate this function change 2 18 to 1 2 20...

Page 191: ...n external signal is sent to the unit this setting defines the level of night time low noise that will be applied 3 Level 3 2 Level 2 1 Level 1 This setting will only be effective when the optional ex...

Page 192: ...refer to the result on the inverter checker module All 3 phases and neutral are available and Inverter PCB control is active Check if the green LED HAP on the inverter PCBs are blinking normal approx...

Page 193: ...t U V W Voltage output U V W Frequency 10 Hz 6 sec 3 sec 3 sec 30 sec Check 4 Check 5 Check 1 AC power input at terminals L1B L2B L3B 575 V unbalance maximum 2 Check 2 DC voltage at connector X5A incr...

Page 194: ...se operation setting 2 30 Power consumption limitation level step 1 via the external control adaptor DTA104A61 62 If the system needs to run under power consumption limitation conditions when an exter...

Page 195: ...0 default Fan speed is limited 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 controll...

Page 196: ...rence of air blow noise between outdoor units Default value 0 Field setting Mode A 1 Mode B 2 2 49 Height difference setting Default value 0 In case the outdoor unit is installed in the highest positi...

Page 197: ...le to dual module installation 2 Dual module to triple module installation Conditions rules apply for this setting Refer to selection software or contact your Daikin sales representative for further d...

Page 198: ...fan Value 2 89 Intermittent fan operation 0 default OFF 1 30 minutes OFF 1 minute ON with medium fan speed 2 30 minutes OFF 1 minute ON with high fan speed 2 90 Indoor unit without power U4 error gen...

Page 199: ...is recommended to keep this setting to 0 or 1 2 92 Te target temperature upper limit Default value 1 Value 2 92 Te target temperature upper limit 0 L 1 default M 2 H If Auto Te then use this setting t...

Page 200: ...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 201: ...tting Type I Value 2 16 Auxiliary heater 0 default OFF 1 ON 2 37 Auxiliary heater setting Type II Value 2 37 Controlling mode 0 default OFF 1 Mode 1 2 Mode 2 3 Mode 3 4 Mode 4 5 Mode 5 6 Mode 6 Type D...

Page 202: ...would be locked out when the outdoor air temperature is smaller than the Heat Pump Lockout Temperature below this setting is only affective when heat pump lockout mode has been set Unit will switch t...

Page 203: ...bnormality J3 Accumulator inlet thermistor R10T abnormality J5 Heat exchanging deicer thermistor R11T and heat exchanger gas pipe thermistor R8T R9T abnormality J6 Receiver inlet thermistor R3T and su...

Page 204: ...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 205: ...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 206: ...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 207: ...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 208: ...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 209: ...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 210: ...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 211: ...or warnings Are all units securely installed Dangerous for turning over during storm Possible damage to pipe connections Is the ground wire installed according to the applicable local standard Danger...

Page 212: ...mote controller connected to CXTQ TA 6 The compressor will be forcibly stopped if the compressor is running at this time After that the gas furnace will run in tens of seconds Tens of minutes might we...

Page 213: ...ndoor Fan Motor 242 3 9 Blower Motor Not Running 243 3 10 Indoor Fan Motor Status Abnormality 244 3 11 Low Indoor Airflow 245 3 12 Swing Flap Motor Abnormality 246 3 13 Power Supply Voltage Abnormalit...

Page 214: ...mpressor Instantaneous Overcurrent 311 3 52 Compressor Overcurrent 313 3 53 Compressor Startup Abnormality 315 3 54 Transmission Error between Inverter PCB and Outdoor Unit Main PCB 317 3 55 Power Sup...

Page 215: ...56 4 Check 357 4 1 High Pressure Check 357 4 2 Low Pressure Check 358 4 3 Superheat Operation Check 360 4 4 Power Transistor Check 362 4 5 Refrigerant Overcharge Check 363 4 6 Refrigerant Shortage Che...

Page 216: ...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 217: ...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 218: ...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 219: ...d Cause 1 The gas furnace does not start operation The gas furnace does not start operation while the compressor is during operation or under stop control or right after defrost IN or defrost OUT Wait...

Page 220: ...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 221: ...aking 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 th...

Page 222: ...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 223: ...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 224: ...te Talk communication error 268 C4 l Indoor heat exchanger liquid pipe thermistor abnormality 269 C5 l Indoor heat exchanger gas pipe thermistor abnormality 269 C6 l Combination error between indoor u...

Page 225: ...tartup abnormality 315 LC l Transmission error between inverter PCB and outdoor unit main PCB 317 P1 l Power supply voltage imbalance 319 P4 1 l Inverter radiation fin temperature abnormality 321 PJ l...

Page 226: ...l PCB and the indoor unit PCB AH 04 Dust detection sensor error when the self cleaning decoration panel is mounted Check for the connections of the connector X12A on the panel PCB and the connectors X...

Page 227: ...E3 flowchart and make a diagnosis of the relevant unit based on the Error code shown to the left E3 03 E3 04 Activation of high pressure switch S1PH Slave 1 E3 05 E3 06 Activation of high pressure swi...

Page 228: ...ave 1 E9 08 Electronic expansion valve coil Y1E error Slave 2 E9 09 Electronic expansion valve coil Y2E error Slave 2 E9 10 Electronic expansion valve coil Y3E error Slave 2 E9 20 Defective electronic...

Page 229: ...ctive fan PCB Master M1F H7 22 Defective fan PCB Master M2F H7 23 Defective fan PCB Slave 1 M1F H7 24 Defective fan PCB Slave 1 M2F H7 25 Defective fan PCB Slave 2 M1F H7 26 Defective fan PCB Slave 2...

Page 230: ...heat exchanger gas lower thermistor R9T Slave 1 J6 13 Defective heat exchanger gas lower thermistor R9T Slave 2 J6 14 Error detection of heat exchanger gas upper thermistor R8T Master J6 15 Error dete...

Page 231: ...Error detection of subcooling heat exchanger gas pipe thermistor R6T Slave 1 J9 10 Error detection of subcooling heat exchanger gas pipe thermistor R6T Slave 2 J9 11 Receiver gas purge thermistor R13...

Page 232: ...Momentary power failure during test operation Master Refer to the L2 flowchart and make a diagnosis of the relevant unit based on the Error code shown to the left L2 02 Momentary power failure during...

Page 233: ...M2F LC 33 Transmission error Between outdoor units sub PCB Master LC 34 Transmission error Between outdoor units sub PCB Slave 1 LC 35 Transmission error Between outdoor units sub PCB Slave 2 P1 01 I...

Page 234: ...inverter 1 power supply Master U2 03 Defective capacitor in inverter 1 main circuit Master U2 08 Shortage of inverter 1 power supply voltage Slave 1 U2 09 Open phase of inverter 1 power supply Slave...

Page 235: ...g Refer to page 347 Connection of excessive indoor units Refer to the UA flowchart and make a diagnosis of the relevant unit based on the Error code shown to the left UA 18 Connection of wrong models...

Page 236: ...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 237: ...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 238: ...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 239: ...nnecting 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 either...

Page 240: ...rminals 2 is in accordance to 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...

Page 241: ...n 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 circu...

Page 242: ...pins more than the judgment 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 minute...

Page 243: ...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 244: ...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 372 YES Replace the fan motor M1F Replace the indoor unit...

Page 245: ...ed Causes Defective indoor fan motor Broken wires Defective contact Troubleshooting CHECK 16 Refer to page 372 NO YES YES Is the X4A connector securely connected NO Is the power of 12 VDC supplied bet...

Page 246: ...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 247: ...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 248: ...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 249: ...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 250: ...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 251: ...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 252: ...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 253: ...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 254: ...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 255: ...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 256: ...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 257: ...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 376 NO Y...

Page 258: ...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 259: ...nges 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 drain pip...

Page 260: ...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 261: ...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 262: ...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 263: ...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 264: ...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 265: ...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 266: ...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 267: ...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 268: ...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 269: ...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 270: ...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 271: ...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 272: ...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 273: ...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 274: ...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 275: ...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 276: ...C9 for FXTQ TA FXTQ TB and CXTQ TA models CHECK 11 Refer to page 366 Is the thermistor normal Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may b...

Page 277: ...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 278: ...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 279: ...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 280: ...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 281: ...PCB Troubleshooting 1 Connector and indoor unit control PCB CHECK 11 Refer to page 366 Is the optional remote sensor is installed Field setting 10 20 2 is set to 03 Connector is connected to the indo...

Page 282: ...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 283: ...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 284: ...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 285: ...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 286: ...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 287: ...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 288: ...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 289: ...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 290: ...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 291: ...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 292: ...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 293: ...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 294: ...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 295: ...n 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 error recurs at start...

Page 296: ...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 297: ...r the same as the actual measured values of the high and low pressure sensors Replace the outdoor unit main PCB A1P NO Replace the inverter PCB A4P CHECK 4 Is the power transistor normal YES Replace t...

Page 298: ...urrent is detected from the fan PCB Detecting overcurrent 4 times will shut down the system Current does not increase at fan motor startup or while the fan motor is in operation Detecting 4 times will...

Page 299: ...Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged A Check for any wire connection errors in 2 fan motors M1F Connectors are white both...

Page 300: ...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 301: ...then turn it 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 Prope...

Page 302: ...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 303: ...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 304: ...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 305: ...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 306: ...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 307: ...abled while the compressor is not running Supposed Causes Defective connection of jumpers between PCB Defective outdoor unit main PCB A1P Defective inverter PCB Troubleshooting Check for the transmiss...

Page 308: ...nt 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 for M2F Master Slave 1 Slave...

Page 309: ...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 310: ...mistor R12T X15A Group connector 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 c...

Page 311: ...K 12 Refer to page 369 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 312: ...2 Refer to page 369 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 313: ...tected during the output of waveform before compressor startup Detect according to current value detected with the current sensor during synchronous operation for startup Error Decision Conditions Whe...

Page 314: ...rror could have resulted from external factors other than failures e g external noise or thunder YES Replace the compressor and the inverter PCB 1 together Replace the inverter PCB 1 NO NO YES Replace...

Page 315: ...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 316: ...High outdoor air temperature Incorrect power supply voltage Defective connection of connectors Troubleshooting Continue operation Field factor Power module temperature may have risen due to high outd...

Page 317: ...late not fixed with screws U0 error Defective fan PCB High outdoor air temperature Troubleshooting Continue operation Field factor Radiation fin temperature may have risen due to high outdoor air temp...

Page 318: ...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 319: ...OFF YES Restarting the system results in the recurrence of the error Continue operation Replace the compressor NO YES Replace the inverter PCB YES Restarting the system results in the recurrence of t...

Page 320: ...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 Caution...

Page 321: ...mpressor 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 Check the refrigerant system Powe...

Page 322: ...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 323: ...nt system NO Replace the inverter PCB A4P NO YES NO The internal wiring of the compressor coil is defective Replace the compressor YES Is the insulation resistance of the relevant compressor 100 k or...

Page 324: ...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 325: ...icrocomputer normal monitor indication lamp green on the outdoor unit main PCB A1P is blinking Properly connect the connector NO YES Is the connector between the outdoor unit main PCB and the sub PCB...

Page 326: ...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 327: ...ction Results attached to 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 Da...

Page 328: ...he unit operation is continued P4 will be displayed by pressing the inspection button Supposed Causes Defective radiation fin temperature thermistor Defective inverter PCB Defective compressor Defecti...

Page 329: ...es to a value equivalent to open or short circuit Supposed Causes Defective fan PCB Defective fan motor Troubleshooting The insulation resistance of the relevant fan motor is less than 1 M Turn ON the...

Page 330: ...etting after replacing outdoor unit main PCB Troubleshooting Does the inverter PCB part No match that of the spare parts list Does the fan PCB part No match that of the spare parts list Has the DIP sw...

Page 331: ...to page 358 CHECK 12 Refer to page 369 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 332: ...pposed Causes Power supply reverse phase T phase open phase Defective outdoor unit main PCB A1P Troubleshooting There is an open phase at the power supply T phase terminal section X1M of the outdoor u...

Page 333: ...PCB Defective outdoor unit main PCB Defective compressor Defective main circuit wiring Defective fan motor Defective connection of signal cable Troubleshooting There are some defects in the power supp...

Page 334: ...ter PCB If the inverter PCB gets severely damaged the compressor and the fan motor M1F M2F may have been damaged Replace the inverter PCB If the inverter PCB gets severely damaged check for the compre...

Page 335: ...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 336: ...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 337: ...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 338: ...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 339: ...age 64 for Main Sub setting Control by 2 remote controllers Main Sub setting of both remote controllers is set to Main All indoor unit PCB microcomputer normal monitors blinking Resets normally when p...

Page 340: ...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 341: ...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 342: ...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 343: ...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 344: ...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 345: ...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 346: ...ror between main and sub remote controller Connection between sub remote controllers Defective remote controller PCB Troubleshooting Refer to page 64 for Main Sub setting Main Sub setting of both remo...

Page 347: ...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 348: ...ant 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 g...

Page 349: ...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 350: ...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 351: ...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 352: ...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 353: ...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 354: ...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 355: ...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 356: ...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 357: ...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 358: ...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 359: ...ransmission 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 ou...

Page 360: ...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 361: ...on wiring to create the one system status and then check whether or not the system is normal NO YES YES After fixing incorrect wiring press the RETURN BS3 button on the master outdoor unit PCB for 5 s...

Page 362: ...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 363: ...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 364: ...r unit Degradation incondensing capacity Dirty condenser Mixingofnon condensablegas Decreased airflow rate Decreased fan output Defective fan motor Defective outdoor unit main PCB Including capacity s...

Page 365: ...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 366: ...Check SiUS342004EB 359 Part 6 Service Diagnosis Reference Reference CHECK 7 Refer to page 364 CHECK 8 Refer to page 365...

Page 367: ...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 368: ...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 369: ...f resistance No Measuring 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...

Page 370: ...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 371: ...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 372: ...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 373: ...M FXNQ M FXTQ TA Type A FXTQ TB CXTQ 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 Ty...

Page 374: ...5 41 51 05 50 95 51 07 10 50 39 91 39 92 39 97 15 59 31 44 31 50 31 51 20 68 24 95 25 02 25 02 25 77 19 94 20 00 20 00 30 86 16 04 16 10 16 10 35 95 12 99 13 04 13 04 40 104 10 58 10 63 10 63 45 113...

Page 375: ...26 165 7 16 23 35 95 13 17 134 3 13 16 40 104 10 74 109 4 10 73 45 113 8 806 89 58 8 800 50 122 7 260 73 73 7 255 55 131 6 014 60 98 6 012 60 140 5 008 50 67 5 010 65 149 4 191 42 29 4 196 70 158 3 5...

Page 376: ...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 377: ...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 378: ...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 379: ...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 380: ...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 381: ...B FXUQ P FXSQ05 48TA FXSQ05 48TB FXMQ07 12PB FXMQ15 24TB FXAQ P FXEQ P FXUQ PA Measuring points Judgment criteria 1 4 1 or more 2 4 1 or more 3 4 1 or more 7 4 1 or more Measuring points Judgment crit...

Page 382: ...A 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 more Gray 5 Pink 4 Or...

Page 383: ...alue 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 Y7E Measuring points Judgment criteria Y...

Page 384: ...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 6 35 55 2 6 3 6 4 6 Orange 1 Red 2 Yellow 3 Black 4 5 Gray 6 Measuring point...

Page 385: ...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 Orange 3...

Page 386: ...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 387: ...ce motor control end bell verify motor refer to Motor Checks on page 382 9 Depress the orange power button to turn off motor 10 Disconnect power Disconnect diagnostic tool 11 Reconnect the 4 wire harn...

Page 388: ...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 389: ...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 390: ...SiUS342004EB 383 Part 7 Appendix 1 Wiring Diagrams 384 1 1 Outdoor Unit 384 1 2 Indoor Unit 386 1 3 Air Treatment Equipment 409 Part 7 Appendix...

Page 391: ...SiUS342004EB Wiring Diagrams Part 7 Appendix 384 1 Wiring Diagrams 1 1 Outdoor Unit RXYQ72 96 120 144 168XAYCA 2D119209B...

Page 392: ...TERMINAL 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...

Page 393: ...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 394: ...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 395: ...SiUS342004EB Wiring Diagrams Part 7 Appendix 388 FXFQ07 09 12 15 18 24 30 36 48TVJU 3D086460B...

Page 396: ...Wiring Diagrams SiUS342004EB 389 Part 7 Appendix BYCQ125BGW1 Self Cleaning Decoration Panel for FXFQ T 3D076375A...

Page 397: ...SiUS342004EB Wiring Diagrams Part 7 Appendix 390 FXZQ05 07 09 12 15 18TAVJU 3D110443A...

Page 398: ...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 399: ...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 400: ...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 401: ...SiUS342004EB Wiring Diagrams Part 7 Appendix 394 FXEQ07 09 12 15 18 24PVJU 3D098557A...

Page 402: ...Wiring Diagrams SiUS342004EB 395 Part 7 Appendix FXDQ07 09 12 18 24MVJU C 3D050501C...

Page 403: ...SiUS342004EB Wiring Diagrams Part 7 Appendix 396 FXSQ05 07 09 12 15 18 24 30 36 48 54TAVJU C 3D110467C...

Page 404: ...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 405: ...SiUS342004EB Wiring Diagrams Part 7 Appendix 398 FXMQ07 09 12 15 18 24 30 36 48 54PBVJU 3D093209B...

Page 406: ...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 407: ...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 408: ...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 409: ...SiUS342004EB Wiring Diagrams Part 7 Appendix 402 FXHQ12 24 36MVJU 3D048116C...

Page 410: ...Wiring Diagrams SiUS342004EB 403 Part 7 Appendix FXAQ07 09 12 18 24PVJU 3D075354F...

Page 411: ...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 412: ...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 413: ...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 414: ...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 415: ...30V AC Error output max 0 3A 230V AC X30A P2 M SS1 SS1 P1 S V2C N 2 P2 X2M P2 F2 X2M USER INTERFACE S A5P V1C N 1 P1 P1 A2P REMOTE USER INTERFACE F1 M F1F2 COMMUNICATION SEE OUTDOOR UNIT FOR MORE DETA...

Page 416: ...Wiring Diagrams SiUS342004EB 409 Part 7 Appendix 1 3 Air Treatment Equipment 1 3 1 Outdoor Air Processing Unit FXMQ48 72 96MFVJU 3D065426D...

Page 417: ...SiUS342004EB Wiring Diagrams Part 7 Appendix 410 1 3 2 Energy Recovery Ventilator VAM Series VAM300 470 600GVJU 3D073269D...

Page 418: ...Wiring Diagrams SiUS342004EB 411 Part 7 Appendix VAM1200GVJU 3D073270D...

Page 419: ...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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