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Daikin VRV FXAQ-AR, Service Manual

The Daikin VRV FXAQ-AR is a high-performance air conditioning unit designed for maximum comfort and efficiency. For easy maintenance and troubleshooting, make sure to download the free Service Manual from manualshive.com. This manual provides valuable insights and instructions for optimal performance of your unit.

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Wiring Diagrams

SiME332106E

298

Part 7 Appendix

1.2.5  Wall Mounted

FXAQ20/25/32/40/50/63ARVM

3D118250G

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Summary of Contents for VRV FXAQ-AR

Page 1: ...Service Manual RXYMQ A Series Heat Pump 50 60 Hz SiME332106E...

Page 2: ...oor Unit 15 1 2 VRV Indoor Unit 18 2 Functional Parts Layout 20 2 1 RXYMQ4AVMK 20 2 2 RXYMQ4 5 6AYFK 22 Part 3 Remote Controller 24 1 Applicable Models 25 2 Names and Functions 27 2 1 BRC1E63 27 2 2 B...

Page 3: ...6 6 Overload Protection Control 64 7 Special Control 65 7 1 Pump Down Residual Control 65 7 2 Oil Return Control 65 7 3 Defrost Control 67 8 Outline of Control Indoor Unit 68 8 1 Set Temperature and C...

Page 4: ...e Controller 149 3 1 BRC1E63 149 3 2 BRC1H81 Series 150 3 3 BRC4M Series 151 4 Error Code via Outdoor Unit PCB 152 5 Troubleshooting by Error Code 153 5 1 Error Codes and Descriptions 153 5 2 Error Co...

Page 5: ...ror between Microcomputers on Outdoor Unit Main PCB 230 5 46 Transmission Error between Inverter PCB and Outdoor Unit Main PCB 231 5 47 Inverter Circuit Capacitor High Voltage 233 5 48 Power Supply Vo...

Page 6: ...rigerant Shortage Check 279 6 7 Vacuuming and Dehydration Procedure 280 6 8 Thermistor Check 281 6 9 Pressure Sensor Check 284 6 10 Broken Wire Check of the Relay Wires 285 6 11 Fan Motor Connector Ch...

Page 7: ...E332106E Introduction 1 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 6 3 Revision History 7 Introducti...

Page 8: ...manual is for the person in charge of maintenance and inspection Warning Do not store equipment in a room with fire sources e g naked flames gas appliances electric heaters Be sure to disconnect the p...

Page 9: ...nt system an excessively high pressure results causing equipment damage and injury Caution Do not repair electrical components with wet hands Working on the equipment with wet hands may cause an elect...

Page 10: ...ble at the connection terminals Improper connections may cause excessive heat generation or fire When wiring between the indoor and outdoor units make sure that the terminal cover does not lift off or...

Page 11: ...fire Check to see if parts and wires are mounted and connected properly and if connections at the soldered or crimped terminals are secure Improper installation and connections may cause excessive he...

Page 12: ...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 13: ...SiME332106E Revision History Introduction 7 3 Revision History Month Year Version Revised contents 09 2021 SiME332106E First edition...

Page 14: ...del Names 9 1 1 Outdoor Unit 9 1 2 VRV Indoor Unit 9 2 External Appearance 10 2 1 Outdoor Unit 10 2 2 VRV Indoor Unit 10 3 Capacity Range 11 3 1 Connection Ratio 11 3 2 Outdoor Unit Combinations 11 4...

Page 15: ...RXYMQ 4A VMK 4A 5A 6A YFK Capacity range kW 2 2 2 8 3 6 4 5 5 6 7 1 9 0 11 2 14 0 16 0 Power supply Standard HP 0 8 1 1 25 1 6 2 2 5 3 2 4 5 6 Capacity index 20 25 31 25 40 50 62 5 80 100 125 140 Cei...

Page 16: ...or Unit 2 2 VRV Indoor Unit Ceiling mounted cassette Ceiling concealed duct Wall mounted Round flow cassette with sensing FXFSQ AR RXYMQ4AVMK RXYMQ4AYFK RXYMQ5AYFK RXYMQ6AYFK 4 5 6 HP Slim duct Standa...

Page 17: ...outdoor units 50 130 Connection ratio Total capacity index of the indoor units Capacity index of the outdoor units Model RXYMQ4AVMK RXYMQ4AYFK RXYMQ5AYFK RXYMQ6AYFK kW 11 3 14 1 16 0 HP 4 5 6 Capacit...

Page 18: ...ide Side Motor Quantity 1 1 Model Brushless DC Brushless DC Output pcs W 234 600 Airflow rate Cooling m min 87 123 Heating m min 94 145 Compressor Quantity 1 1 Motor Quantity 1 1 Model Inverter Invert...

Page 19: ...1 1 Model Brushless DC Brushless DC Output pcs W 600 600 Airflow rate Cooling m min 123 123 Heating m min 145 145 Compressor Quantity 1 1 Motor Quantity 1 1 Model Inverter Inverter Type Hermetically s...

Page 20: ...14 Part 2 Refrigerant Circuit 1 Refrigerant Circuit Piping Diagrams 15 1 1 Outdoor Unit 15 1 2 VRV Indoor Unit 18 2 Functional Parts Layout 20 2 1 RXYMQ4AVMK 20 2 2 RXYMQ4 5 6AYFK 22 Part 2 Refrigera...

Page 21: ...or operation 11 Pressure regulating valve This valve opens at a pressure of 4 0 MPa for prevention of pressure increase thus resulting in no damage of functional parts due to the increase of pressure...

Page 22: ...Refrigerant Circuit Piping Diagrams SiME332106E 16 Part 2 Refrigerant Circuit RXYMQ4AVMK C 3D132648A 7 9 8 14 1 12 6 13 2 3 4 11 15 5 10 16 18 17 19...

Page 23: ...SiME332106E Refrigerant Circuit Piping Diagrams Part 2 Refrigerant Circuit 17 RXYMQ4 5 6AYFK C 3D132707A 7 9 8 14 1 12 6 13 2 3 4 11 15 5 10 16 18 17 19...

Page 24: ...egree control while in heating 2 Suction air thermistor R1T All indoor units Used for thermostat control 3 Indoor liquid pipe thermistor R2T All indoor units Used for gas superheating degree control w...

Page 25: ...SiME332106E Refrigerant Circuit Piping Diagrams Part 2 Refrigerant Circuit 19 FXAQ20 25 32 40 50AR FXAQ63AR C 4D121516A 2 3 4 1 C 4D122027A 2 3 4 1...

Page 26: ...gerant auto charge Y4E Thermistor Discharge pipe R21T High pressure switch S1PH Low pressure sensor S1NPL Compressor M1C Thermistor Subcooling heat exchanger liquid pipe R5T High pressure sensor S1NPH...

Page 27: ...SiME332106E Functional Parts Layout Part 2 Refrigerant Circuit 21 C 1P627964E Back view Thermistor Heat exchanger deicer R7T Thermistor Heat exchanger liquid pipe R4T...

Page 28: ...charge Y4E High pressure switch S1PH Compressor M1C Thermistor Subcooling heat exchanger liquid pipe R5T High pressure sensor S1NPH Electronic expansion valve Injection Y2E C 1P642649E Top View Side...

Page 29: ...SiME332106E Functional Parts Layout Part 2 Refrigerant Circuit 23 C 1P642649E Back view Thermistor Heat exchanger deicer R7T Thermistor Heat exchanger liquid pipe R4T...

Page 30: ...H81 Series 35 3 3 When Wireless Remote Controller is Used Together 36 4 Address Setting for Wireless Remote Controller 37 4 1 Setting for Signal Receiver PCB 37 4 2 Setting for BRC4M Series 38 4 3 Mul...

Page 31: ...t available depending on the remote controller type Refer to page 26 for details Series Wired remote controller Wireless remote controller Navigation Madoka Remote controller Receiver FXFSQ AR 1 BRC1E...

Page 32: ...c Eco airflow rate Eco infrared floor temperature sensor Sensing sensor stop mode Sensing sensor low mode Setpoint range set Setback OFF timer programmed Weekly schedule timer ON OFF timer Setting tem...

Page 33: ...set temperature Used to highlight the item below the current selection The highlighted items will be scrolled through when the button is pressed continuously Used to change the selected item 6 Right...

Page 34: ...e Menu screen Basic Screen Operation mode changeover Temperature setting Airflow rate Airflow direction Menu display Confirmation of each setting On Off Cancel Operation lamp Main Menu Circulation air...

Page 35: ...just a setting default increase For a full description of the behavior of the status indicator see the installer and user reference guide Home screens Depending on installer configuration the controll...

Page 36: ...timer or OFF timer is enabled Clock not set Indicates that controller s clock is not set Self cleaning filter operation Indicates that self cleaning filter operation is active Inspection Indicates tha...

Page 37: ...BUTTON is pressed the display shows the system mode is in Do not operate this button during normal use Press the button and the air conditioner will start Press the button again and the air conditione...

Page 38: ...es the signals from the remote controller 23 24 TIMER INDICATOR LAMP Green This lamp stays lit while the timer is set 25 26 OPERATING INDICATOR LAMP Red This lamp stays lit while the air conditioner r...

Page 39: ...to check the initial set value Press the INSPECTION button twice to return to the normal mode Indoor unit model type Initial set value Round flow cassette with sensing FXFSQ AR 2111 Slim duct Standard...

Page 40: ...yed on the bottom of the screen while Checking the connection Please stand by is displayed How to change Main Sub setting You may change the Main Sub setting of the remote controller while Checking th...

Page 41: ...roller that is connected to the indoor unit it will automatically get designated as master controller When using 2 remote controller For a second controller to get designated as slave controller manua...

Page 42: ...ck temperature setpoints Draft prevention Duty rotation 3 3 When Wireless Remote Controller is Used Together When using both a wired and a wireless remote controller for 1 indoor unit the wired contro...

Page 43: ...ntrol using the group operation For the wiring for the group operation please refer to the installation manual attached to the indoor unit and technical guide 4 1 Setting for Signal Receiver PCB The a...

Page 44: ...4 seconds to get the Field Setting mode Indicated in the display area in the figure 2 Press the SELECT button and select a multiple setting A b Each time the button is pressed the display switches bet...

Page 45: ...ote controller operation when the functions are restricted as by an external control Other than the left A Standard factory set All items displayed Accepts the functions except restricted Sounds one l...

Page 46: ...ss Group and then press the Menu Enter button Press the Cancel button once Select the desired Group No using the Up Down buttons and then press the Menu Enter button Service settings menu is displayed...

Page 47: ...dress Unit and then press the Menu Enter button Press the Cancel button once Select the desired Group No using the Up Down buttons and then press the Menu Enter button Service settings menu is display...

Page 48: ...fine groups and or units in the first level and set or release addresses for those groups and or units in the second First level Group Group A group is a group of indoor units Unit Group Unit A unit i...

Page 49: ...ation after all indications were displayed once for about 1 minute on the liquid crystal display This is not an operative fault F1 F2 F1 F2 P1 P2 RC RC RC RC RC F1 F2 P1 P2 F1 F2 P1 P2 F1 F2 P1 P2 F1...

Page 50: ...displayed Press the Cancel button once Press the Cancel button Press and hold the Cancel button for 4 seconds or more Press and hold the Cancel button for 4 seconds or more Maintenance menu is display...

Page 51: ...t 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 dis...

Page 52: ...n EV Degree that electronic expansion valve is open pulse MP Drain pump ON OFF EH Electric heater ON OFF Hu Humidifier ON OFF TBF Anti freezing control ON OFF FLOAT FLOAT SWITCH ON OFF T1 T2 T1 T2 inp...

Page 53: ...ay an error 8 Directly displays a measured value sent from the adaptor PCB Maintenance Menu Item 2 Remarks Addressed Sensor Value Unit No 0 15 Select the unit number you want to check Code 00 01 02 03...

Page 54: ...roller may display more or less icons than are indicated here From the information screen press and simultaneously and keep them pressed until you enter the installer menu Category Icon Settings Categ...

Page 55: ...ge Pipe Protection Control 60 6 4 Inverter Protection Control 61 6 5 Heating Operation Prohibition 64 6 6 Overload Protection Control 64 7 Special Control 65 7 1 Pump Down Residual Control 65 7 2 Oil...

Page 56: ...ter control Startup control include pressure equalization before startup 1 Cooling startup control 2 Heating startup control Normal control 1 List of functions in normal control 2 Compressor control 3...

Page 57: ...of the abnormal state occurs the system will make stop with thermostat OFF and the error will be determined according to the number of retry times Refer to Error Codes and Descriptions on page 153 fo...

Page 58: ...ress melting of the refrigerant to the evaporator 3 2 Crankcase Heater Control In order to prevent the refrigerant from melting in the compressor oil in the stopped mode this mode is used to control t...

Page 59: ...temperature Td Discharge temperature 4 1 Cooling Startup Control 4 2 Heating Startup Control 0 Hz 0 pulse 480 pulse fully open Step4 Te 10 C Te Th2 10 INV 20 rps Pc Pe 0 42 MPa INV 20 rps Pc Pe 0 32...

Page 60: ...ction Y2E 0 480 pulse at compressor ON Electronic expansion valve Refrigerant jacket Y3E 480 pulse Electronic expansion valve Refrigerant auto charge Y4E Minimum pulse Four way valve Y1S OFF equipped...

Page 61: ...airflow to L tap If the capacity is still too much the target evaporation or condensation temperature is elevated further to adjust 2 VRT Control When one or more of the connected indoor units are not...

Page 62: ...be changed based on the selected sub function taking indoor load into account The initial target saturated temperature can be changed For details refer to Details of Setting Mode Mode 2 on page 122 fo...

Page 63: ...0 40 4 40 4 86 164 4 164 4 20 42 6 42 6 86 173 9 173 9 21 41 3 41 3 87 167 4 21 43 7 43 7 87 177 0 177 0 22 42 2 42 2 88 170 3 22 44 8 44 8 88 180 1 180 1 23 43 2 43 2 89 173 4 23 46 0 46 0 89 183 5 1...

Page 64: ...ges Limited opening when condensing temperate exceeds target condensing 5 6 Step Control of Outdoor Fans Used to control the revolutions of outdoor fans in the steps listed in table below according to...

Page 65: ...e following control is performed in the entire system Normal control Pc 3 55 MPa High pressure standby Reduce compressor capacity step Pc 3 72 MPa Pc 3 04 MPa When occurring 3 times within 40 minutes...

Page 66: ...ransient increase of discharge pipe temperature Normal control Pe 0 35 MPa Low pressure standby Reduce compressor capacity step Pe 0 07 MPa Pe 0 40 MPa When occurring 3 times within 60 minutes the err...

Page 67: ...rmality or transient inverter overcurrent and fin temperature increase Inverter overcurrent protection control by primary current CTi1 Cooling Condition Primary current CTi1 A Ta 43 C Ta 43 C A 27 0 C...

Page 68: ...5 90 sec or 19 0 C 22 1 D 14 5 E 18 5 Heating Condition Secondary current CTi2 A A 18 0 90 sec or 18 5 B 19 0 90 sec or 19 5 C 22 1 D 15 0 E 19 0 6 8 10 12 14 16 18 20 22 24 43 44 45 46 47 48 49 50 51...

Page 69: ...h compressor Cooling Condition All compressors A more than 91 C B less than 89 C C more than 110 C Heating Condition All compressors A more than 86 5 C B less than 83 5 C C more than 110 C Normal cont...

Page 70: ...n result in insufficient compressor internal oil lubrication Heating is disabled when outdoor air temperature rises above 27 C Forced thermostat OFF indoor units Outdoor fan operates at step 1 Heating...

Page 71: ...il discharged from the compressor The total amount of oil discharged from the compressor is computed from Tc Te and compressor loads Oil return control starts every 8 hours of cumulative operation of...

Page 72: ...2E 0 pulse Electronic expansion valve Refrigerant jacket Y3E 480 pulse 0 480 pulse when radiation fin temperature increases Electronic expansion valve Refrigerant auto charge Y4E 480 pulse Four way va...

Page 73: ...ure Tb Defrost control starts every 2 hours even if the reference values are not met Starting conditions Part Name Electric Symbol RXYMQ A Function Compressor motor M1C RXYMQ4AVMK 70 rps RXYMQ4 6AYFK...

Page 74: ...is 5 C When using the floor temperature as the control target the remote controller set temperature is equal to the actual control target temperature in heating operation The above also applies to au...

Page 75: ...g 8 2 Thermostat Control 8 2 1 Without Optional Infrared Presence Floor Sensor The thermostat ON OFF condition is determined by the difference between the remote controller set temperature and the act...

Page 76: ...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 the floor temperature is...

Page 77: ...2 C 24 C 28 C Heating mode Cooling mode Control temp Differential value set to 3 C 23 5 C Heating mode Cooling mode Control temp 25 C Set heating temp 27 C Set cooling temp 24 C Set heating temp 27 C...

Page 78: ...emperature Thermostat OFF Set 1 The fan keeps rotating at the speed as just before the thermostat off 1 Heating Thermostat ON Set The fan tap is determined by the difference between control target tem...

Page 79: ...stat OFF Horizontal P0 Swing set Thermostat ON Swing Thermostat OFF Horizontal P0 Fan Direction set Set Swing set Swing Conditions FXFSQ AR When airflow direction is set Automatic airflow rate and eco...

Page 80: ...for each airflow outlet individually Note This function is inoperative for the airflow outlet where an individual airflow direction is set 8 6 Eco Full Automatic Control FXFSQ AR only This is a generi...

Page 81: ...eously After the thermostat turns OFF the drain pump continues to operate for another 5 minutes 1 If the float switch turns ON again during the residual operation of the drain pump cooling operation a...

Page 82: ...he 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 con...

Page 83: ...Condition for cancelling Liquid pipe temperature 7 C for 10 minutes continuously Concept of freeze up prevention control System avoids freeze up For comfort system avoids unnecessary thermostat ON OF...

Page 84: ...sition C is carried out for 1 hour When there is any change to fan operation airflow direction and operation ON OFF state during dew condensation prevention control this control is canceled Dew conden...

Page 85: ...it gas pipe temperature R3T Tl Indoor unit liquid pipe temperature R2T SHS Target superheating degree Normally 5 C As T Remote controller set temp Suction air temp becomes larger SHS becomes lower As...

Page 86: ...utomatic control 8 11 2 Operational Concept Standard Panel Circulation airflow operation continues for up to 90 minutes Set temp Target temp t Circulation airflow Auto airflow rate and direction Circu...

Page 87: ...20 600 04 Pattern 4 120 600 120 600 Heating Factory setting Movement pattern a b c d Appearance Time seconds 13 23 14 01 Pattern 1 120 120 120 120 02 Pattern 2 120 120 0 0 03 Pattern 3 0 0 120 120 04...

Page 88: ...ol ON OFF is conducted by converting the heater temperature into the condensing pressure equivalent saturated temperature Tc according to the temperature detection through the high pressure sensor S1N...

Page 89: ...Control Mode 106 2 Field Settings for Outdoor Unit 108 2 1 Function Setting 108 2 2 Settings by DIP Switches 109 2 3 Settings by BS Buttons 112 2 4 Normal Mode 114 2 5 Monitor Mode Mode 1 115 2 6 Sett...

Page 90: ...using Up Down button 4 In the case of setting per indoor unit during group control When Mode No such as 20 21 22 23 25 are selected highlight the unit No and select indoor unit No to be set by using U...

Page 91: ...etails of the outdoor unit see installation manual attached to the outdoor unit 6 Press Menu Enter button Setting confirmation screen is displayed 7 Select Yes and press Menu Enter button Setting deta...

Page 92: ...gs related to the indoor unit and to the controller itself Field settings are composed of the following components Screen Field settings Indoor unit Define a mode by setting a Mode number Define the u...

Page 93: ...te for unlimited time Making Field Settings 1 Tap the settings icon The Unit settings screen appears 2 Tap Field settings The Field settings screen appears 3 Tap and select the type Indoor unit or Rem...

Page 94: ...total setting all of Second Code No which may be set are displayed as is changed to Second Code No to be set And Second Code No means no function In case of multiple setting changes repeat steps 4 th...

Page 95: ...1 Hold down the INSPECTION button for at least 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 FAN or BACK LIGHT button...

Page 96: ...g when thermostat OFF during VRTsmart control Disabled Enabled 96 11 21 2 Indoor fan settings during cooling heating thermostat OFF Normal Fan OFF 96 3 Setting of airflow rate when heating Standard Sl...

Page 97: ...selection Standard High static pressure 102 6 External static pressure settings Refer to the page on the right for details 103 7 Setting of swing patterns when cooling thermostat is OFF Refer to the...

Page 98: ...ection 1 External ON OFF input 2 Thermostat differential changeover 3 Airflow setting when heating thermostat is OFF 4 Automatic mode differential 5 Auto restart after power failure 6 Airflow setting...

Page 99: ...When the unit is not equipped with an infrared floor sensor Factory setting The factory setting for the Second code No is 01 and room temperature is controlled by the suction air thermistor for indoo...

Page 100: ...32 34 36 21 19 17 23 25 27 29 31 33 35 37 14 16 18 20 22 24 26 28 30 32 14 16 18 20 22 24 26 28 30 32 34 In cooling In heating Suction air temperature C Suction air temperature C Suction air thermisto...

Page 101: ...by 1 C maximum 2 C after the state of absence continues for a certain period of time Absent time defined for detection can be selected as follows Factory setting The set temperature displayed on the...

Page 102: ...ction is changed to horizontal When disabled 12 22 6 the airflow volume setting when cooling thermostat OFF is enabled 13 23 7 the swing setting when cooling thermostat OFF is enabled is as set When e...

Page 103: ...o select High Middle or Low 3 Make settings to adjust the airflow rate automatically After setting the operation mode to fan enter the field setting mode while operation is stopped and then select the...

Page 104: ...This setting should be used to have the actual floor temperature detected when for example the unit is installed close to a wall Factory setting Actual procedure to use the setting Although the stand...

Page 105: ...before deciding installation location Factory setting 1 4 18 Automatic Mode Differential This setting makes it possible to change differential values for mode selection while in automatic operation m...

Page 106: ...ple the unit is installed close to a wall Factory setting Specific usages of this setting There is no problem with the standard setting in the usual condition Change the setting in the cases indicated...

Page 107: ...Outlets 2 way Outlets 13 23 0 01 Standard Lower than 2 7 m Lower than 3 1 m Lower than 3 0 m Lower than 3 5 m 02 High Ceiling Lower than 3 0 m Lower than 3 4 m Lower than 3 3 m Lower than 3 8 m 03 Hig...

Page 108: ...he following airflow direction setting according to the respective purpose 1 Some indoor unit models are not equipped with draft prevention upward function 2 When the model FXFSQ AR is attached with a...

Page 109: ...et to swing flaps swing even when the thermostat is OFF This setting allows to change the airflow direction when the thermostat is OFF Factory setting 1 4 29 Setting of Circulation Airflow This is to...

Page 110: ...en the heating thermostat is OFF Factory setting Cooling Factory setting Movement pattern a b c d Appearance Time sec 13 23 14 01 Pattern 1 120 600 120 600 02 Pattern 2 120 600 0 0 03 Pattern 3 0 0 12...

Page 111: ...unit this setting is unnecessary Factory setting 1 4 35 Individual Ventilation Setting This is set to perform individual operation of heat reclaim ventilation using the remote controller central unit...

Page 112: ...n on the next page Central remote controller is normally available for operations Except when centralized monitor is connected Contents of Control Modes 20 modes consisting of combinations of the foll...

Page 113: ...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 stop ON OF...

Page 114: ...2 50 of rated capacity or less 11 Demand 2 Level 3 55 of rated capacity or less 12 Demand 3 Forced thermostat off Use the optional board DTA104A61 Wire external signal s to the optional adaptor DTA104...

Page 115: ...settings described above Be sure to refer to the table on the following page in order to make settings of spare PCB after replacement Enforce a re initialization of communication press the RETURN BS3...

Page 116: ...itch 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 RXYMQ4 6AYFK 3 BS button BS1 BS3 2 Segm...

Page 117: ...6 5 62 7 7 7 29 5 35 66 6 72 7 3 3 5 029 7 21 6 5 6 3 7 29 5 21 7 5 5 5 17 3 3 5 029 7 5 6 1 33 1 5 6 6 1 7 38 7 5 5 5 17 3 3 25 5 87 21 2 127 728 7 7 5 6 5 3 7 5 6 7 5 5 029 1 1 75 20321 17 12 250 7...

Page 118: ...tus performance settings or address setting Monitor mode Used to verify contents of settings quantity of units current value of some parameters during operation of outdoor unit Mode changing procedure...

Page 119: ...n 5 sec Normal mode Initial condition Press RETURN BS3 button once Select setting item with SET BS2 button Setting condition selection SET Press RETURN BS3 button once Setting condition Contents displ...

Page 120: ...oor outdoor transmission status Used to check for the initial status of indoor outdoor transmission 2 Descriptions Used to display an error content Initializing SEG1 SEG2 SEG3 Initializing completed O...

Page 121: ...N OFF Legend Segment MODE BS1 MODE BS1 RETURN BS3 RETURN BS3 SET BS2 Checking for description of data Press the SET BS2 button to select any of the monitoring item listed in the following table Press...

Page 122: ...n normal operation In demand operation 0 1 3 Automatic backup operation setting 1 0 3 OFF ON 0 1 4 Defrost selection setting 1 0 4 Slow defrost Normal Quick defrost 0 1 2 5 Te setting 1 0 5 Normal 6 C...

Page 123: ...r of abnormal status judgment outdoor unit PCB 1 3 3 Possible 0 15 1 0 5 38 Number of connected RA indoor through BP unit 1 3 8 Possible 0 63 6 0 3 40 Cooling comfort setting 1 4 0 Possible 0 3 0 3 41...

Page 124: ...the MODE BS1 button to return to normal mode If you become unsure of how to proceed press the MODE BS1 button and return to normal mode SEG1 SEG2SEG3 Normal Default Normal hold 5 seconds BLINKS ON OF...

Page 125: ...later 2 1 0 Defrost IN 2 Normal Defrost IN 2 0 1 2 11 Eco setting is available from an external input When this configuration is set it is not possible to turn the Eco refrigerant control ON OFF usin...

Page 126: ...city priority Cancel the low noise level control if capacity is required while low noise operation or night time low noise operation is in progress 2 2 9 OFF ON 0 1 30 Demand 1 setting Used to make a...

Page 127: ...re in VRTsmart control 2 7 7 Low Standard High 1 High 2 High 3 High 4 High 5 High 6 0 1 2 3 4 5 6 7 78 VRT control Te upper limit Used to change upper limit of target evaporation temperature in VRT co...

Page 128: ...2 6 0 Once setting 2 6 1 is active it is not automatically returning to default when exit mode 2 Mode 2 8 Te target temperature for cooling operation Change the setting in function of required operati...

Page 129: ...pressure level 0 2 Mode 2 21 Refrigerant recovery vacuuming Default value 0 Recovery mode not active Set 1 outdoor and indoor electronic expansion valves are opened fully except EV3 for PCM vessel Com...

Page 130: ...t time is reached The time judgment is taken from outdoor air tendency Default value 2 10 00 PM Field setting 1 8 00 PM 3 12 00 AM midnight Mode 2 27 Stop time automatic night time low noise operation...

Page 131: ...op the power transistor check mode change setting to default 2 28 0 Output to U V W will also stop when outdoor unit main PCB decides standby mode of inverter circuit Below time graphs show the differ...

Page 132: ...15 V unbalance max 2 Check 2 AC U V W 10 Hz intermediate check difference within 10 V at fasten U V W Note Actual voltage value depends on meter characteristics 6 sec 3 sec Check 1 100V AC Step 2 Mode...

Page 133: ...comfort setting The comfort level is related to the timing and the effort power consumption which is put in achieving a certain room temperature by changing temporally the refrigerant temperature to...

Page 134: ...ired room temperature very fast The overshoot is not allowed from the startup moment The startup occurs under the condition which is defined by the operation mode In case of heating operation the cond...

Page 135: ...it press once the cool heat selector button on the remote controller of the indoor unit to be set as cool heat master Mode 2 84 Initial opening electronic expansion valve BP unit heating thermostat ON...

Page 136: ...mode 2 77 VRTsmart control Tc lower limit is set In case of VRT control The priority of each setting is as follows 1 Mode 2 23 Eco Control Unavailable Setting 2 Mode 2 11 External Eco Setting and ext...

Page 137: ...w noise operation command will be ignored to put the system into normal operation mode B When night time low noise operation is carried out automatically External control adaptor for outdoor unit is n...

Page 138: ...se operation level setting Factory setting is OFF Night time Operation sound 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...

Page 139: ...el 1 The compressor operates at 60 or less of rating Short circuit 1 and C on the terminal strip TeS1 Set the item 2 32 to Demand 1 and the item 2 30 to Level 1 Level 2 The compressor operates at 65 o...

Page 140: ...been set at factory The power consumption set 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 le...

Page 141: ...valve Checkpoints Cautions or warnings Are all units securely installed Dangerous for turning over during storm Possible damage to pipe connections Is the earth wire installed according to the applica...

Page 142: ...the outdoor and indoor units 2 Make sure all field settings you want are set 3 Turn ON the power to the outdoor unit and the connected indoor units 4 Make sure the default idle situation is existing...

Page 143: ...r test operation is completed timer lamps blink on all indoor units connected Set the master unit as customer s request It is recommended to set the indoor unit with highest frequency of use as the ma...

Page 144: ...ttings with the master unit Field settings made with the slave unit will be all invalid The check operations shown below will be automatically initiated Check for erroneous wirings Check for failure t...

Page 145: ...ty 166 5 8 Power Supply Voltage Abnormality 172 5 9 Electronic Expansion Valve Coil Abnormality Dust Clogging 175 5 10 Humidifier System Abnormality 176 5 11 Auto Grille Unit Error 177 5 12 Defective...

Page 146: ...Inverter Radiation Fin Temperature Abnormality 237 5 51 Field Setting after Replacing Outdoor Unit Main PCB Abnormality or Combination of PCB Abnormality 239 5 52 Refrigerant Shortage Warning Cooling...

Page 147: ...ion Procedure 280 6 8 Thermistor Check 281 6 9 Pressure Sensor Check 284 6 10 Broken Wire Check of the Relay Wires 285 6 11 Fan Motor Connector Check Power Supply Cable 285 6 12 Fan Motor Connector Ch...

Page 148: ...close the service cover Otherwise leakage of water or contamination by foreign matter may cause defects 3 Precautions for maintaining the electrical box 1 Turn off the power for 10 minutes before ope...

Page 149: ...1 20 0 40 10 1 09 40 2 42 48 0 12 18 0 43 12 1 15 42 2 54 46 0 13 16 0 46 14 1 22 44 2 67 44 0 15 14 0 50 16 1 29 46 2 80 42 0 16 12 0 54 18 1 37 48 2 93 40 0 18 10 0 57 20 1 45 50 3 07 38 0 19 8 0 61...

Page 150: ...ng operation Too many heat sources e g OA equipment located in a room Dry operation The reason is that the dry operation serves not to reduce the room temperature where possible Change the system to c...

Page 151: ...h much oil or dust Uneven temperature distribution due to heavy stain of the inside of the indoor unit Clean the inside of the indoor unit Indoor unit Immediately after cooling operation stopping the...

Page 152: ...the remote controller Immediately after turning ON the power supply The reason is that the system is checking to be sure the remote controller is normal Normal operation This code is displayed for a p...

Page 153: ...n the range P0 P3 8 When using 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 Althoug...

Page 154: ...Cut the power supply Defective local power supply Normal Remove the compressor wiring from the power supply terminal Isolate the wiring and be careful not to touch the live parts Turn the power suppl...

Page 155: ...corrective action Operation Status Display Abnormal shutdown The system stops operating The operation lamp green starts to blink The message Error Push Menu button blinks at the bottom of the screen...

Page 156: ...h an error screen from as soon as you try to enter the main menu consult your dealer 3 2 1 Refrigerant Leak Detection When the system detects a refrigerant leak an alarm goes off Stop the alarm and co...

Page 157: ...nit number until the indoor unit beeps and perform the following operation according to the number of beeps Number of beeps 3 short beeps Perform all steps from 3 to 6 1 short beep Perform 3 and 6 ste...

Page 158: ...ay For inspecting error code on indoor unit please consult Display of the remote controller connected to the indoor units If there are no remote controllers there should be a central control device se...

Page 159: ...bnormality dust clogging 175 AF k Humidifier system abnormality 176 AH l Auto grille unit error 177 AJ l Defective capacity setting 178 C1 l Transmission abnormality between indoor unit PCB and fan PC...

Page 160: ...r radiation fin temperature rise abnormality 222 L5 l Compressor instantaneous overcurrent 224 L8 l Compressor overcurrent 226 L9 l Compressor startup abnormality 228 LC l Transmission error between m...

Page 161: ...ting in the way of rotating the filter e g the filter comes off or the drive gear is clogged with foreign matter AH 07 Damper rotation error when the self cleaning decoration panel is mounted The damp...

Page 162: ...e sensor is too high and if there is any foreign matter that may cause noise U4 01 Indoor Outdoor transmission error Refer to the U4 flowchart UA 13 Refrigerant type error The type of refrigerant used...

Page 163: ...flowchart and make a diagnosis based on the Error code shown to the left F4 08 Wet error for compressor M1C F4 14 Indoor unit failure alarm F6 02 Excess refrigerant charge error Excess refrigerant ch...

Page 164: ...it capacitor high voltage Refer to the P1 flowchart and make a diagnosis based on the Error code shown to the left Unbalanced power supply voltage P3 01 Defective reactor thermistor 1 Refer to the P3...

Page 165: ...sed on the Error code shown to the left UA 00 TSS plus unit field settings error CT address duplication warning Refer to the UA flowchart and make a diagnosis based on the Error code shown to the left...

Page 166: ...nal protection device Improper field setting Defective indoor unit PCB Troubleshooting Activation of external protection device External protection device is connected to terminals T1 and T2 of the in...

Page 167: ...ile memory Maintains memory contents even when the power supply is turned OFF Supposed Causes Defective indoor unit control PCB External factor Noise etc Troubleshooting YES Caution Be sure to turn of...

Page 168: ...ting 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 a short circuit conn...

Page 169: ...drain pump works when the power supply is reset for the indoor unit The voltage of drain pump terminals 2 is in accordance to the criteria 3 within 5 minutes of resetting the power supply A Model 1 F...

Page 170: ...increase Supposed Causes Broken 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...

Page 171: ...e fan YES NO Disconnect the connector from the fan motor and then make measurement of resistance between pins CHECK 17 Turn OFF the power supply and then wait for a period of 10 minutes Replace the fa...

Page 172: ...an Supposed Causes Defective indoor fan motor Broken wires Defective contact Troubleshooting CHECK 16 Refer to page 285 YES NO NO YES Check the indoor fan motor and the wiring circuits of the fan moto...

Page 173: ...ion 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 rotation speed is less than a certain le...

Page 174: ...atter around the fan Connect the connector properly Replace the indoor fan motor M1F Replace the indoor fan motor M1F Connect the connector properly CHECK 16 Caution Be sure to turn off the power swit...

Page 175: ...fan motor and check the resistance Theresistance amongU V andWareunbalanced orbelow1 YES NO YES NO Replace the fan PCB A2P The HAP lamp of the indoor unit PCB A1P blinks and the HAP lamp of the fan PC...

Page 176: ...gn matter Disconnection of fan motor connectors Fan motor lock Defective fan motor Defective indoor unit PCB Troubleshooting Connect the connector correctly Turn OFF the power supply and wait for 10 m...

Page 177: ...iagnosis 171 1 Check also if the relay connector between the indoor unit control PCB and the fan motor are correctly connected YES Replace the fan motor M1F Replace the indoor unit control PCB A1P The...

Page 178: ...on on signal line Defective wiring Instantaneous power failure others Troubleshooting YES There are problems on the condition of power supply described above Caution Be sure to turn off the power swit...

Page 179: ...s FXFSQ AR Error Code A8 01 Method of Error Detection This error is detected by checking the voltage status with the microcomputer Error Decision Conditions Overvoltage or voltage drop is detected on...

Page 180: ...rly connected Properly connect the connector NO YES There are problems on the condition of power supply described above Replace the harness YES Is the harness connecting the X27A and the terminal bloc...

Page 181: ...ture of liquid pipe of heat exchanger R2T shows fixed degrees or below Supposed Causes Defective electronic expansion valve coil Defective indoor unit control PCB Defective relay cables Troubleshootin...

Page 182: ...hile the compressor is not in operation Error code is displayed but the system operates continuously Supposed Causes Humidifier unit optional accessory leaking Defective drain piping upward slope etc...

Page 183: ...ion limit switch detects a position for less than one second while the grille is moving downward Supposed Causes A large load on the grille Tangled wire Defective motor Defective limit switch Troubles...

Page 184: ...he capacity code is not saved to the PCB and the capacity setting adaptor is not connected A capacity that does not exist for that unit is set Supposed Causes The capacity setting adaptor was not inst...

Page 185: ...ion 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 certain duration Suppos...

Page 186: ...hort circuit and connect X70A back to original condition NO Is the connector between indoor unit PCB A1P and fan PCB A2P accurately connected 1 Caution Be sure to turn off the power switch before conn...

Page 187: ...ction of the transmission connector X70A Defective indoor unit control PCB External factor such as noise Troubleshooting Check the indoor unit control PCB A1P Connect the connector correctly NO YES YE...

Page 188: ...e indoor unit PCB X70A and the auto grille control PCB X12A is checked with the microcomputer Error Decision Conditions When transmission communication between the indoor unit PCB and the auto grille...

Page 189: ...connected NO YES NO Remove the external factor YES Is there any external factor such as noise Check the indoor unit PCB and the auto grille control PCB NO Is Auto grille elevation operation displayed...

Page 190: ...d thermistor CHECK 11 Refer to page 281 Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Remove the thermistor from the indoor unit PC...

Page 191: ...ting 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 Has the indoor unit control PCB A...

Page 192: ...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 193: ...f the connector of the fan motor lead wire Defective fan motor Broken wires or defective insulation Defective PCB A1P Troubleshooting Replace the fan motor Resistances between UVW phases of the fan mo...

Page 194: ...nsor connector CE 01 Defective infrared floor sensor Temperature compensation circuit disconnection CE 02 Defective infrared floor sensor Temperature compensation short circuit CE 03 Defective infrare...

Page 195: ...tput refer to sensor and address data No 22 25 Connect the connector correctly Connect the connector correctly NO YES YES Is the connection of the connector on infrared presence sensor PCB A3P and the...

Page 196: ...output refer to sensor and address data No 26 Connect the connector correctly Connect the connector correctly NO YES YES Is the connection of the connector on infrared floor sensor PCB A2P and the co...

Page 197: ...Check infrared floor sensor output refer to sensor and address data No 26 Is the connection of the connector on infrared floor sensor PCB A2P and the connector X81A on A1P normal Is the connection of...

Page 198: ...Check infrared floor sensor output refer to sensor and address data No 26 Is the connection of the connector on infrared floor sensor PCB A2P and the connector X81A on A1P normal Is the connection of...

Page 199: ...system operates continuously Supposed Causes Defective remote controller thermistor Defective remote controller PCB Troubleshooting 1 How to delete history of error codes Press the ON OFF button for 4...

Page 200: ...re section between the indoor unit and the outdoor unit are not normal Supposed Causes Defective outdoor unit main PCB Disconnection of the inside outside relay wires Troubleshooting Return to normal...

Page 201: ...leshooting 1 M1C Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Correct the wiring Normal Keep operating It is possibly caused by te...

Page 202: ...rning ON the power supply Supposed Causes Disconnection of connector X101A Wiring disconnection Defective outdoor unit main PCB Troubleshooting NO YES Is the system reset to normal Is X101A connected...

Page 203: ...lace the high pressure sensor S1NPH YES Are the above 3 points OK Does the error E3 recur NO Is the operating pressure of the high pressure switch normal 4 0 MPa NO YES A NO 1 Mount a pressure gauge o...

Page 204: ...ressure sensor is normal and outdoor unit main PCB is also normal The high pressure has really become high Eliminate factors that cause the high pressure to rise CHECK 1 Are both pressure values the s...

Page 205: ...ntroller and then restart the operation Is the stop valve open The low pressure sensor is normal and outdoor unit main PCB is also normal The low pressure has really become low Replace the outdoor uni...

Page 206: ...lock High differential pressure 0 5 MPa or more UVW connection error Defective inverter circuit The stop valve is not opened Troubleshooting Make proper wire connections Make proper wire connections...

Page 207: ...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 relevant PCB 1 NO The...

Page 208: ...during the fan motor runs Error Decision Conditions When overcurrent is detected Detecting overcurrent 4 times will shut down the system When the fan revolutions fall below a given level for a period...

Page 209: ...t the connector YES NO NO Replace the relevant PCB 2 YES Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged A Check for Connection of Co...

Page 210: ...HECK 16 Replace the outdoor main PCB A1P NO The HAP lamp on A1P blinks Turn ON the power supply to check for the HAP lamp on the outdoor main PCB A1P Replace the fan motor M1F YES A NO Replace the fan...

Page 211: ...hen turn it ON again Return to normal Investigate external causes other than failures e g noise Replace the outdoor unit main PCB A1P YES NO Connector for the electronic expansion valve of the outdoor...

Page 212: ...perature detected with the discharge pipe or compressor body thermistor Error Decision Conditions When discharge pipe temperature becomes abnormally high i e 135 C or more When discharge pipe temperat...

Page 213: ...e pipe temperature measured by the Service Checker and the measurement of discharge pipe surface temperature Connect the Service Checker Reset the system operation and then restart it Are the characte...

Page 214: ...pressure of each part Error Decision Conditions When the following wet state continues for a period of 180 minutes an alert is issued An error is defined for 240 minutes Wet state in outdoor units Whe...

Page 215: ...the indoor units NO YES NO Replace the indoor electronic expansion valve Replace the suction pipe thermistor YES YES Caution Be sure to turn off the power switch before connecting or disconnecting co...

Page 216: ...rigerant overcharged Disconnection of outdoor air thermistor Disconnection of heat exchanger liquid pipe thermistor Disconnection of subcooling liquid pipe thermistor Troubleshooting CHECK 11 Refer to...

Page 217: ...ons When normal transmission between PCBs is disabled during the compressor stops running Supposed Causes Defective connection of harnesses between PCBs Defective outdoor unit main PCB Defective inver...

Page 218: ...ressor OL Error Decision Conditions If the error occurs the system is shut down Reset condition Continuous run for about 60 minutes without any other error Supposed Causes Disconnection of discharge p...

Page 219: ...nce Nearly 0 Nearly 0 Insert the thermistor in position Replace the discharge pipe thermistor Replace the outdoor unit main PCB A1P Discharge pipe thermistor disconnected CHECK 11 Check the discharge...

Page 220: ...the current sensor is abnormal Supposed Causes Disconnection Short circuit in fan motor leads or disconnection of connector Defective fan PCB Troubleshooting Replace the fan motor M1F NO YES Replace...

Page 221: ...es 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 co...

Page 222: ...Thermistor RXYMQ A Electric symbol Connector H9 Outdoor air thermistor R1T X18A J3 Discharge pipe thermistor R21T X19A J5 Suction pipe thermistor R3T X30A Group connector J6 Heat exchanger deicer the...

Page 223: ...page 284 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 the outdoor unit...

Page 224: ...page 284 Are the characteristics of the low pressure sensor normal Make a comparison between voltage characteristics and gauge pressure Replace the low pressure sensor S1NPL Replace the outdoor unit m...

Page 225: ...tected based on the current value during waveform output before starting compressor Error is detected based on the value from current sensor during synchronous operation when starting the unit Error D...

Page 226: ...er Then turn on the power again Is the insulation to ground resistance of the compressor 100 k or more The error could have resulted from external factors other than failures e g external noise or thu...

Page 227: ...ection 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 disconnection of...

Page 228: ...stop valve Troubleshooting Subcode L4 01 Defective radiation from the power unit Blocked air suction port Stained radiation fin High outdoor air temperature Connect the connector correctly Eliminate P...

Page 229: ...Field factor Heat sink radiation fin temperature may have risen due to high outdoor air temperature NO Replace the relevant PCB 2 YES Turn ON the power supply Does the error recur when operation start...

Page 230: ...lation failure Compressor startup failure mechanical lock Defective outdoor unit main PCB RXYMQ4AVMK Defective inverter PCB RXYMQ4 6AYFK Troubleshooting Compressor model A A 2Y350APAX2N 48 1 2Y420AVAY...

Page 231: ...essor M1C NO YES Replace the inverter PCB A3P Restarting the system results in the recurrence of the error Continue operation The error could have resulted from causes such as instantaneous power fail...

Page 232: ...sor overloaded Wiring disconnection in compressor coil Disconnection of compressor wiring Defective outdoor unit main PCB RXYMQ4AVMK Defective inverter PCB RXYMQ4 6AYFK Troubleshooting Compressor mode...

Page 233: ...ssor coil is defective Replace the compressor M1C YES NO Replace the relevant PCB 1 NO Power OFF CHECK 4 Is the power transistor normal YES The difference between high and low pressure before restarti...

Page 234: ...YFK Troubleshooting 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 compres...

Page 235: ...evant PCB 1 NO YES NO The internal wiring of the compressor coil is defective Replace the compressor M1C YES Is the insulation resistance of the compressor 100 k or more Refrigerant is stagnated The u...

Page 236: ...Defective fan motor Troubleshooting Properly connect the harness NO YES Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Is the harne...

Page 237: ...PCB Defective outdoor unit main PCB transmission block Defective noise filter External factors e g noise Defective compressor Defective fan motor Troubleshooting Does the inverter PCB part No match th...

Page 238: ...verter PCB and the fan PCB securely connected Replace the fan PCB A4P NO YES The service monitor green on the fan PCB A4P is blinking NO Replace the outdoor unit main PCB A1P YES Continue operation Th...

Page 239: ...errors Error Decision Conditions The voltage waveform fluctuates greatly Supposed Causes Defective main circuit capacitor Incorrect main circuit wiring Defective outdoor unit main PCB Troubleshooting...

Page 240: ...age imbalance through inverter PCB Error Decision Conditions Power supply voltage imbalance exceeds approximately 12 V Error is not decided while the unit operation is continued P1 will be displayed b...

Page 241: ...e 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 responsibility...

Page 242: ...uses wiring disconnection or short circuit in it Supposed Causes Defective connection of thermistor Defective reactor surface thermistor Defective inverter PCB Troubleshooting Make measurement of resi...

Page 243: ...ion fin thermistor 2 Thermistor located in PCB circuit Error Decision Conditions When the resistance of the thermistor comes to a value equivalent to open or short circuit Error is not decided while t...

Page 244: ...or M1C Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged The insulation resistance of the fan motor is less than 1 M Turn ON the power...

Page 245: ...to replace the outdoor unit main PCB YES NO YES NO Replace with a correct outdoor unit main PCB A1P Properly make DIP switch setting After completion of setting reset the power supply Replace the out...

Page 246: ...Refer to page 272 CHECK 3 Refer to page 273 CHECK 7 Refer to page 279 Replace the thermistor R3T NO Replace the outdoor unit main PCB A1P YES YES Are the characteristics of the suction pipe thermistor...

Page 247: ...on valve or superheating operation Error Decision Conditions The following conditions are satisfied for 20 minutes or more Suction pipe temperature Low pressure equivalent saturation temperature 30 C...

Page 248: ...ure sensor S1NPL Correct the abnormally low pressure Correct the insufficient low refrigerant condition Correct the superheat operation NO YES Is refrigerant shortage detected as a cause of abnormally...

Page 249: ...e Outdoor air temperature Low pressure equivalent saturation temperature 15 C Opening degree of the electronic expansion valve of all the indoor units that have thermostat ON is 400 pulses or more Hig...

Page 250: ...ant jacket Y3E YES Replace the electronic expansion valve coil Y3E Correct the abnormally low pressure Correct the insufficient low refrigerant condition Correct the superheating operation NO YES Is r...

Page 251: ...by Error Code Part 6 Service Diagnosis 245 Reference Reference Reference Reference Reference CHECK 3 Refer to page 273 CHECK 7 Refer to page 279 CHECK 11 Refer to page 281 CHECK 12 Refer to page 284...

Page 252: ...phase 4 wires is properly connected to the terminal block The fuse of the noise filter PCB is blown out Power supply voltage falls within 380 V to 415 V between L1 L2 L2 L3 and L3 L1 The connectors be...

Page 253: ...al power supply voltage Instantaneous power failure Open phase Defective inverter PCB RXYMQ4 6AYFK Defective outdoor unit main PCB Defective compressor Defective main circuit wiring Defective fan moto...

Page 254: ...tton Replace the outdoor unit main PCB A1P If the outdoor unit main PCB gets severely damaged the compressor and the fan motor may have been damaged Replace the outdoor unit main PCB A1P If the outdoo...

Page 255: ...is maintained within 12 V NO Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged The inverter PCB has damage NO YES Replace the inverter...

Page 256: ...dby mode before completing the startup operation of the compressor The error U2 recurs NO YES NO YES NO YES Replace the inverter PCB A3P Check for wirings Turn ON the power supply and then press the O...

Page 257: ...nducted U3 03 Conduct the test operation Test operation failed due to indoor unit error U3 02 Check for the refrigerant piping and then conduct the test operation U3 04 Conduct the test operation due...

Page 258: ...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 tim...

Page 259: ...replaced or has the indoor outdoor transmission wiring been modified U4 01 1 OFF ON BLINK SEG1 SEG2 SEG3 1 2 Correct the voltage Replace the fuse Modify the transmission wirings Press and hold RETURN...

Page 260: ...according to relevant error codes NO YES Check controller indoor units 1 Some error about thermistor or fan motor electronic expansion valve or defective PCB 2 Test operation was interrupted by the MO...

Page 261: ...e 34 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 pow...

Page 262: ...unified address setting error functional unit external control adaptor for outdoor unit Defective outdoor unit main PCB Defective external control adaptor for outdoor unit Troubleshooting Go to Diagno...

Page 263: ...tdoor unit Diagnosis Flowchart 1 Supply power to the outdoor unit Is power supplied to the outdoor unit Is the microcomputer normal monitor on the outdoor unit main PCB blinking Is the microcomputer n...

Page 264: ...he 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 R...

Page 265: ...nsmission wirings Replace the outdoor unit main PCB A1P Rectify the error in the connection of transmission wirings and then reset the power supply NO The capacity to connect indoor units falls within...

Page 266: ...between main and sub remote controller Connection between sub remote controllers Defective remote controller PCB Troubleshooting Refer to page 34 for Main Sub setting Main Sub setting of both remote...

Page 267: ...its Defective electronic expansion valve of other indoor unit Defective indoor unit PCB of other indoor unit Improper connection of transmission wiring between indoor and outdoor unit Troubleshooting...

Page 268: ...f connected indoor units Defective outdoor unit main PCB Mismatch of the refrigerant type of indoor and outdoor unit Setting of outdoor unit main PCB was not carried out after replacing to spare PCB T...

Page 269: ...oor unit main PCB A1P Match the refrigerant types of the outdoor unit and the indoor unit Diagnosis Flowchart 1 UA 17 Error code Sub code Diagnosis Flowchart 2 Error code Sub code UA 18 NO YES YES YES...

Page 270: ...Troubleshooting by Error Code SiME332106E 264 Part 6 Service Diagnosis Replace the outdoor unit main PCB A1P Diagnosis Flowchart 4 Error code Sub code UA 21...

Page 271: ...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 c...

Page 272: ...cks if transmission between indoor unit and centralized controller is normal Error Decision Conditions Transmission is not carried out normally for a certain amount of time Supposed Causes Transmissio...

Page 273: ...ontrol group 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...

Page 274: ...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 275: ...d Causes Improper connection of transmission wiring between indoor outdoor units Failure to execute check operation Defective indoor unit PCB Stop valve is not opened Troubleshooting Is indoor outdoor...

Page 276: ...t time after installation or after an indoor or outdoor unit main PCB has been replaced Does an error occur even after 12 minutes elapses from the time when electricity is introduced to indoor and out...

Page 277: ...High airflow passage resistance Dirty filter Obstacle Excessiverefrigerantcharging Improper model selection In heating Check to be sure the stop valve is open Conduct visual checks for pipe conditions...

Page 278: ...efective electronic expansion valve control Are the coil resistance and insulation normal Check for the thermistor resistance and connection Check for the thermistor resistance and connection Are the...

Page 279: ...f the outdoor unit electronic expansion valve excessively throttled 3 Temperature increase of discharge pipe Defective subcooling electronic expansion valve Are the coil resistance and insulation norm...

Page 280: ...a of superheat operation 1 Suction gas superheating degree 10 C and over 2 Discharge gas superheating degree 45 C and over except immediately after compressor starts up or is running under dropping co...

Page 281: ...fan to rotate the capacitor may store electricity Therefore make sure that the fan is still and then pull out the outdoor fan motor connector 5 Disconnect the connection wire between the power transi...

Page 282: ...on Multimeter Prepare the analog type of multimeter For the digital type of multimeter those with diode check function are available for the checking No Measuring point Judgment Criteria Remarks 1 P2...

Page 283: ...SiME332106E Check Part 6 Service Diagnosis 277 PCB and Circuit Diagram U V W L3B L2B L1B P1 P2 N32...

Page 284: ...sure gradually rises with increase in frequency Subcooling degree becomes higher Liquid connection pipe temperature lowers Low pressure rises due to decreased compressor output Higher degree of overch...

Page 285: ...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 286: ...of 100 7 kPaG or less for a period of one 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 refrigeran...

Page 287: ...eat exchanger gas thermistor FXFSQ AR Type C Type A Type A FXDQ PD Type B Type J FXDQ ND FXMQ PB FXMQ AR FXAQ AR Thermistor Type R1T Outdoor air thermistor E R21T Discharge pipe thermistor H R3T Sucti...

Page 288: ...65 80 5 51 05 50 9947 51 07 10 39 91 39 9149 39 97 15 31 44 31 4796 31 51 20 24 95 25 0060 25 02 25 19 94 20 0000 20 00 30 16 04 16 1008 16 10 35 12 99 13 0426 13 04 40 10 58 10 6281 10 63 45 8 669 8...

Page 289: ...16 23 15 62 35 13 0683 134 3 13 16 12 65 40 10 6490 109 4 10 73 10 31 45 8 7269 89 58 8 800 8 447 50 7 1905 73 73 7 255 6 962 55 5 9524 60 98 6 012 5 769 60 4 9536 50 67 5 010 4 805 65 4 1434 42 29 4...

Page 290: ...5 1 0 45 9 51 0 5 0 4 5 4 0 3 5 3 0 2 5 2 0 1 5 1 0 0 5 0 0 5 0 5 0 0 5 1 1 5 2 2 5 3 3 5 4 VDC kg cm2 MPa PH PL PH MPa VH 0 5 PL MPa VL 0 5 PH High pressure MPa PL Low pressure MPa VH Output Voltage...

Page 291: ...areas with continuity in the transmission wiring of Indoor Unit b transmission wiring of Indoor Unit c and transmission wiring of Indoor Unit d in the order described If the areas with continuity can...

Page 292: ...sconnected FXMQ50 140PB Measurement of power wire connector Remove the X1A connector from the fan PCB A2P and measure the resistance between the U and V V and W and W and U phases of the motor connect...

Page 293: ...ignal wire connector Remove the X2A connector and measure the resistance between GND and Vcc Hw Hv or Hu terminals of the motor connector with five conductors White 1 Orange 2 Brown 3 Blue 4 5 6 Red 7...

Page 294: ...l show the following conditions Outdoor unit 1 For RXYMQ4AVMK 2 For RXYMQ4 6AYFK Indoor unit FXFSQ AR FXMQ PB Measuring points 1 6 2 6 3 6 4 6 Judgment criteria White 1 Yellow 2 Orange 3 Blue 4 5 Red...

Page 295: ...udgment criteria No continuity 92 46 92 46 White 1 Red 6 Orange 3 1 3 Yellow 2 Blue 4 2 4 M Measuring points 1 2 1 3 1 6 2 4 2 6 Judgment criteria No continuity 300 150 300 150 Blue 4 5 Orange 3 2 Yel...

Page 296: ...SiME332106E 290 Part 7 Appendix 1 Wiring Diagrams 291 1 1 Outdoor Unit 291 1 2 VRV Indoor Unit 293 Part 7 Appendix...

Page 297: ...SiME332106E Wiring Diagrams Part 7 Appendix 291 1 Wiring Diagrams 1 1 Outdoor Unit RXYMQ4AVMK C 3D133942...

Page 298: ...Wiring Diagrams SiME332106E 292 Part 7 Appendix RXYMQ4 5 6AYFK C 3D133944A...

Page 299: ...SiME332106E Wiring Diagrams Part 7 Appendix 293 1 2 VRV Indoor Unit 1 2 1 Round Flow Cassette with Sensing FXFSQ25 32 40 50 63 80 100 125 140ARV1 3D121473A...

Page 300: ...Wiring Diagrams SiME332106E 294 Part 7 Appendix 1 2 2 Auto Grille Panel BYCQ125EBSF Auto Grille Panel for FXFSQ AR 3D130909...

Page 301: ...SiME332106E Wiring Diagrams Part 7 Appendix 295 1 2 3 Slim Duct Standard Type FXDQ20 25 32PDVM FXDQ40 50 63NDVM 3D124914B...

Page 302: ...Wiring Diagrams SiME332106E 296 Part 7 Appendix 1 2 4 Middle high Static Pressure Duct FXMQ40 50 63 80 100 125 140PBV1 3D110450B...

Page 303: ...SiME332106E Wiring Diagrams Part 7 Appendix 297 FXMQ40 50 63 80 100ARV1 3D127112 04 59...

Page 304: ...Wiring Diagrams SiME332106E 298 Part 7 Appendix 1 2 5 Wall Mounted FXAQ20 25 32 40 50 63ARVM 3D118250G 32 5 6833 02 1 0 9 9 5 4 59 4 59 4 590 9...

Page 305: ...t will be used This statement does not purport to exclude restrict or modify the application of any local legislation z Ask a qualified installer or contractor to install this product Do not try to in...

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