Daikin RXQ12AHR Service Manual Download Page 240

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Troubleshooting by Error Code

SiAF341904E

234

Part 6 Service Diagnosis

5.31 Harness Abnormality (between Outdoor Unit Main PCB

and Inverter PCB)

Applicable
Models

All outdoor unit models

Error Code

Method of Error
Detection

Check for the transmission conditions of the following harnesses between the PCBs using
microcomputer:



RXQ6-14A: Inverter 1
Between X28A (A1P) and X6A (A3P)



RXQ16-20A: Inverter 2
Between X28A (A1P) and X6A (A3P)
Between X61A (A3P) and X6A (A6P)

Error Decision
Conditions

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 inverter PCB (A3P, A6P)

Troubleshooting

Check for the transmission
conditions of the following
jumpers between the PCBs:
• RXQ6-14A

Between X28A (A1P) and
X6A (A3P)

• RXQ16-20A

Between X28A (A1P) and
X6A (A3P)
Between X61A (A3P) and
X6A (A6P)

Replace the outdoor unit main
PCB.

Replace the inverter PCB.
RXQ6-14A: A3P
RXQ16-20A: A3P, A6P

YES

Complete countermeasures.

Return the relevant harness to
normal.

Caution

Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.

Harness error

error recurs.

Summary of Contents for RXQ12AHR

Page 1: ...Service Manual Cooling Only 50 60 Hz High COP Type RXQ12 44AHRY1 Series Standard Type RXQ6 60A N RY1 Series SiAF341904E...

Page 2: ...1 1 Outdoor Unit 42 1 2 VRV Indoor Unit 46 2 Functional Parts Layout 47 2 1 RXQ6 8 10 12A 47 2 2 RXQ14 16 18 20A 48 3 Refrigerant Flow for Each Operation Mode 49 3 1 RXQ6 8 10 12 14A 49 3 2 RXQ16 18...

Page 3: ...door Unit Rotation 90 7 2 Oil Return Operation 91 7 3 Inverter Pre Heat Operation 92 8 Outline of Control Indoor Unit 93 8 1 Set Temperature and Control Target Temperature 93 8 2 Thermostat Control 93...

Page 4: ...5 1 External Protection Device Abnormality 183 5 2 Indoor Unit PCB Abnormality 184 5 3 Drain Level Control System Abnormality 185 5 4 Indoor Fan Motor Lock Overload 187 5 5 Indoor Fan Motor Abnormalit...

Page 5: ...ing after Replacing Outdoor Unit Main PCB Abnormality or Combination of PCB Abnormality 259 5 47 Refrigerant Shortage Warning 260 5 48 Open Phase 262 5 49 Power Supply Insufficient or Instantaneous Ab...

Page 6: ...11 Fan Motor Connector Check Power Supply Cable 301 6 12 Fan Motor Connector Check Signal Cable 302 6 13 Electronic Expansion Valve Coil Check 303 Part 7 Appendix 306 1 Wiring Diagrams 307 1 1 Outdoor...

Page 7: ...F341904E 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: ...SiAF341904E Revision History Introduction 7 3 Revision History Month Year Version Revised contents 04 2019 SiAF341904E First edition...

Page 14: ...s 9 1 1 Indoor Unit 9 1 2 Outdoor Unit 9 2 External Appearance 10 2 1 Indoor Unit 10 2 2 Outdoor Unit 11 3 Combination of Outdoor Units 13 4 Capacity Range 15 4 1 Capacity Range for VRV Indoor Units O...

Page 15: ...Capacity index 20 25 31 25 40 50 62 5 80 100 125 140 Ceiling mounted cassette Round flow with sensing type FXFSQ 25AR 32AR 40AR 50AR 63AR 80AR 100AR 125AR 140AR V1 Ceiling mounted duct type FXMQ 40PB...

Page 16: ...F341904E 10 Part 1 General Information 2 External Appearance 2 1 Indoor Unit VRV Indoor Unit Ceiling mounted cassette Round flow with sensing type FXFSQ AR Wall mounted type FXAQ P Ceiling mounted duc...

Page 17: ...VRV X Series High COP Type 12 14 16 18 20 HP 22 24 26 28 30 32 34 HP 42 44 HP 40 HP RXQ40AHRY1 RXQ12AHRY1 RXQ14AHRY1 RXQ16AHRY1 RXQ18AHRY1 RXQ20AHRY1 RXQ24AHRY1 RXQ26AHRY1 RXQ28AHRY1 RXQ30AHRY1 RXQ32A...

Page 18: ...36 38 40 HP 6 8 10 12 HP 42 44 HP RXQ32ANRY1 RXQ34ANRY1 RXQ36ANRY1 RXQ38ANRY1 RXQ40ANRY1 RXQ6ARY1 RXQ8ARY1 RXQ10ARY1 RXQ12ARY1 RXQ14ARY1 RXQ16ARY1 RXQ18ARY1 RXQ20ARY1 RXQ22ANRY1 RXQ24ANRY1 RXQ42ANRY1...

Page 19: ...ge 28 HP 30 HP 32 HP 34 HP 36 HP 38 HP 40 HP 42 HP Model name RXQ28AHR RXQ30AHR RXQ32AHR RXQ34AHR RXQ36AHR RXQ38AHR RXQ40AHR RXQ42AHR Outdoor unit 1 RXQ8AR RXQ8AR RXQ8AR RXQ10AR RXQ10AR RXQ12AR RXQ12A...

Page 20: ...name RXQ38ANR RXQ40ANR RXQ42ANR RXQ44ANR RXQ46ANR RXQ48ANR RXQ50ANR RXQ52ANR Outdoor unit 1 RXQ18AR RXQ20AR RXQ12AR RXQ12AR RXQ14AR RXQ14AR RXQ14AR RXQ16AR Outdoor unit 2 RXQ20AR RXQ20AR RXQ12AR RXQ12...

Page 21: ...1 Connection Ratio Type Min connection ratio Max connection ratio FXMQ PB FXAQ P Including FXFSQ25AR at least one unit Other indoor unit models Single outdoor unit 50 200 130 200 Double outdoor units...

Page 22: ...AR 225 to 585 720 29 36 56 0 20 500 RXQ20AHR RXQ10AR 2 250 to 650 800 32 40 60 8 22 550 RXQ22AHR RXQ6AR RXQ8AR 2 275 to 715 715 35 35 67 2 24 600 RXQ24AHR RXQ8AR 3 300 to 780 780 39 39 72 8 26 650 RXQ...

Page 23: ...AR 2 300 to 780 960 39 48 73 5 26 650 RXQ26ANR RXQ12AR RXQ14AR 325 to 845 1 040 42 52 78 5 28 700 RXQ28ANR RXQ12AR RXQ16AR 350 to 910 1 120 45 56 83 5 30 750 RXQ30ANR RXQ12AR RXQ18AR 375 to 975 1 200...

Page 24: ...6 C1220T Brazing connection Mass kg 165 165 165 165 2 Sound pressure level dB A 59 59 Safety devices High pressure switch Fan driver overload protector Over current relay Inverter overload protector O...

Page 25: ...nection Mass kg 165 165 165 175 2 Sound pressure level dB A 59 60 Safety devices High pressure switch Fan driver overload protector Over current relay Inverter overload protector Over under voltage pr...

Page 26: ...20T Brazing connection Mass kg 175 175 165 165 165 2 Sound pressure level dB A 60 61 Safety devices High pressure switch Fan driver overload protector Over current relay Inverter overload protector Ov...

Page 27: ...nnection 34 9 C1220T Brazing connection Mass kg 165 165 165 165 165 175 2 Sound pressure level dB A 61 61 Safety devices High pressure switch Fan driver overload protector Over current relay Inverter...

Page 28: ...onnection 34 9 C1220T Brazing connection Mass kg 165 165 175 165 175 175 2 Sound pressure level dB A 61 62 Safety devices High pressure switch Fan driver overload protector Over current relay Inverter...

Page 29: ...onnection 34 9 C1220T Brazing connection Mass kg 165 175 175 175 175 175 2 Sound pressure level dB A 63 63 Safety devices High pressure switch Fan driver overload protector Over current relay Inverter...

Page 30: ...g connection 41 3 C1220T Brazing connection Mass kg 175 175 220 175 175 220 2 Sound pressure level dB A 64 64 Safety devices High pressure switch Fan driver overload protector Over current relay Inver...

Page 31: ...azing connection 41 3 C1220T Brazing connection Mass kg 175 220 220 220 220 220 2 Sound pressure level dB A 64 65 Safety devices High pressure switch Fan driver overload protector Over current relay I...

Page 32: ...41 3 C1220T Brazing connection Mass kg 220 220 260 2 Sound pressure level dB A 65 Safety devices High pressure switch Fan driver overload protector Over current relay Inverter overload protector Over...

Page 33: ...igh pressure switch Fan driver overload protector Over current relay Inverter overload protector Over under voltage protection printed circuit board High pressure switch Fan driver overload protector...

Page 34: ...e switch Fan driver overload protector Over current relay Inverter overload protector Over under voltage protection printed circuit board High pressure switch Fan driver overload protector Over curren...

Page 35: ...ressure switch Fan driver overload protector Over current relay Inverter overload protector Over under voltage protection printed circuit board High pressure switch Fan driver overload protector Over...

Page 36: ...h pressure switch Fan driver overload protector Over current relay Inverter overload protector Over under voltage protection printed circuit board High pressure switch Fan driver overload protector Ov...

Page 37: ...nnection Mass kg 175 175 175 175 2 Sound pressure level dB A 61 62 Safety devices High pressure switch Fan driver overload protector Over current relay Inverter overload protector Over under voltage p...

Page 38: ...ng connection Mass kg 175 220 175 260 2 Sound pressure level dB A 63 63 Safety devices High pressure switch Fan driver overload protector Over current relay Inverter overload protector Over under volt...

Page 39: ...razing connection Mass kg 175 260 220 260 2 Sound pressure level dB A 63 64 Safety devices High pressure switch Fan driver overload protector Over current relay Inverter overload protector Over under...

Page 40: ...1220T Brazing connection Mass kg 260 260 260 260 2 Sound pressure level dB A 64 64 Safety devices High pressure switch Fan driver overload protector Over current relay Inverter overload protector Over...

Page 41: ...220T Brazing connection Mass kg 260 285 285 285 2 Sound pressure level dB A 66 68 Safety devices High pressure switch Fan driver overload protector Over current relay Inverter overload protector Over...

Page 42: ...Brazing connection 41 3 C1220T Brazing connection Mass kg 175 175 260 175 175 285 2 Sound pressure level dB A 65 67 Safety devices High pressure switch Fan driver overload protector Over current relay...

Page 43: ...C1220T Brazing connection 41 3 C1220T Brazing connection Mass kg 220 220 260 220 260 260 2 Sound pressure level dB A 65 65 Safety devices High pressure switch Fan driver overload protector Over curren...

Page 44: ...41 3 C1220T Brazing connection 41 3 C1220T Brazing connection Mass kg 220 260 260 260 260 260 2 Sound pressure level dB A 65 65 Safety devices High pressure switch Fan driver overload protector Over...

Page 45: ...mm 41 3 C1220T Brazing connection 41 3 C1220T Brazing connection Mass kg 260 260 260 260 260 285 2 Sound pressure level dB A 66 68 Safety devices High pressure switch Fan driver overload protector Ov...

Page 46: ...mm 41 3 C1220T Brazing connection 41 3 C1220T Brazing connection Mass kg 260 285 285 285 285 285 2 Sound pressure level dB A 69 70 Safety devices High pressure switch Fan driver overload protector Ove...

Page 47: ...rcuit Piping Diagrams 42 1 1 Outdoor Unit 42 1 2 VRV Indoor Unit 46 2 Functional Parts Layout 47 2 1 RXQ6 8 10 12A 47 2 2 RXQ14 16 18 20A 48 3 Refrigerant Flow for Each Operation Mode 49 3 1 RXQ6 8 10...

Page 48: ...e thus resulting in no damage of functional parts due to the increase of pressure in transportation or storage 11 Double tube heat exchanger Subcooling heat exchanger Used to subcool liquid refrigeran...

Page 49: ...e With service port on on site piping side 7 9mm flare connection Check valve Solenoid valve Y3S Capillary tube Check valve ONLY FOR RXQ14ARY1 ONLY FOR RXQ14ARY1 INV Compressor Filter Filter SV HPS Fi...

Page 50: ...arts due to the increase of pressure in transportation or storage 14 Double tube heat exchanger Subcooling heat exchanger Used to subcool liquid refrigerant 15 Capillary tube Used to return the refrig...

Page 51: ...Filter Y4E R8T SENPL Filter Filter Stop valve With service port on on site piping side 7 9mm flare connection Filter Double tube Heat Exchanger Liquid Pipe Pressure Regulating Valve Electronic Expansi...

Page 52: ...stat control 3 Indoor liquid pipe thermistor R2T All indoor units Used for gas superheated degree control while in cooling 4 Indoor gas pipe thermistor R3T All indoor units Used for gas superheated de...

Page 53: ...or Heat exchanger liquid pipe R4T Thermistor Subcooling heat exchanger liquid pipe R5T Solenoid Valve Oil return 1 Y3S Inverter fan M1F Low pressure sensor S1NPL Thermistor Suction pipe R3T High press...

Page 54: ...nger liquid pipe R4T Thermistor Subcooling heat exchanger liquid pipe R5T Thermistor M2C Compressor body R9T Thermistor Suction pipe R3T Electronic expansion valve Refrigerant auto charge Y4E High pre...

Page 55: ...3D112173B High temperature high pressure gas High temperature high pressure liquid Low temperature low pressure EV Normal control Electronic expansion valve Pressure regulating valve Heat sink PCB Hea...

Page 56: ...igh temperature high pressure liquid Low temperature low pressure EV Normal control EV Normal control C 3D112173B Electronic expansion valve Pressure regulating valve Heat sink PCB Heat exchanger Chec...

Page 57: ...k Valve M2C R9T R22T S2PH High pressure switch Filter Y4E Electronic Expansion Valve Refrigerant Auto charge port R8T SENPL Filter Filter Stop valve With service port on on site piping side 7 9mm flar...

Page 58: ...ure low pressure EV Normal control EV Normal control Double tube Heat Exchanger R5T Low pressure sensor S1NPL R3T Pressure Regulating Valve Electronic Expansion Valve Y2E Heat sink PCB R6T R4T R1T FAN...

Page 59: ...ired Remote Controller BRC1E62 BRC1E63 64 3 2 When Wireless Remote Controller is Used Together 65 4 Address Setting for Wireless Remote Controller 66 5 Centralized Control Group No Setting 70 5 1 BRC1...

Page 60: ...the remote controller Refer to page 55 for details Series Wired remote controller Wireless remote controller Old type Wireless remote controller New type 5 step airflow rate Navigation Remote controll...

Page 61: ...aving function Automatic eco airflow rate Eco infrared floor temperature sensor Sensing sensor stop control Sensing sensor low mode Setpoint range set Setback OFF timer programmed Weekly schedule time...

Page 62: ...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 63: ...k calendar Language Service Settings Menu Test operation Maintenance Contract Field settings Min setpoints differential Group address Indoor unit AirNet address Outdoor unit AirNet address Error histo...

Page 64: ...ature 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 button Used...

Page 65: ...direction Quick start Ventilation Energy saving options Schedule Filter auto clean Maintenance information Configuration Current settings Clock Calendar Language The items on each menu vary depending...

Page 66: ...mperature This display shows programmed time of the system start or stop 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...

Page 67: ...lect the fan speed DISPLAY AIRFLOW BLADE DISPLAY FAN SPEED The display shows the set fan speed DISPLAY INSPECTION When the INSPECTION BUTTON is pressed the display shows the system mode is in Do not o...

Page 68: ...EIVER This switch is readily used if the remote controller does not work This receives the signals from the remote controller 23 24 TIMER INDICATOR LAMP Green This lamp stays lit while the timer is se...

Page 69: ...ECTION button to check the initial set value Press the INSPECTION button twice to return to the normal mode Indoor unit model type Initial set value Ceiling mounted cassette Round flow with sensing ty...

Page 70: ...splayed 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 Checkin...

Page 71: ...t as Main 3 2 When Wireless Remote Controller is Used Together When using both a wired and a wireless remote controller for 1 indoor unit the wired controller should be set to Main Therefore the Main...

Page 72: ...control 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 Setting for Signal Receiver PCB The add...

Page 73: ...ing mode SETTING is indicated on the display 2 Press FAN button and select A or b Each time the button is pressed the display switches between A and b 3 Press UP button or DOWN button to select an add...

Page 74: ...r at least 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 s...

Page 75: ...e 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 lon...

Page 76: ...ddress 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 displ...

Page 77: ...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 78: ...e 5 3 Group No Setting Example When turning the power supply on the unit may often not accept any operation while 88 is displaying after all indications were displayed once for about 1 minute on the l...

Page 79: ...is 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 dis...

Page 80: ...Gr Addr Set Indoor unit 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 remot...

Page 81: ...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 82: ...condition will display 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 ch...

Page 83: ...tton to confirm the setting 6 Press INSPECTION TEST button to return to normal mode Mode No Function Content and Operation Method Example of Remote Controller Display 43 Forced Fan ON Turns the fan ON...

Page 84: ...87 6 2 Low Pressure Protection Control 87 6 3 Discharge Pipe Protection Control 88 6 4 Compressor Body Protection Control 88 6 5 Inverter Protection Control 89 7 Special Control 90 7 1 Outdoor Unit Ro...

Page 85: ...including pressure equalization before startup 1 Cooling startup control Normal operation 1 List of functions in normal operation 2 Compressor capacity control 3 Operating priority and rotation of com...

Page 86: ...played on the remote control BRC1E series remote controller stores the last 10 error codes for remote controller and the last 5 error codes for indoor unit You can check the Error History in Service S...

Page 87: ...he compressor for a period of 5 minutes in order to prevent the frequent ON OFF of the compressor and equalize the pressure within the refrigerant system In addition the outdoor fan carry out the resi...

Page 88: ...ressure equivalent saturation temperature 4 1 Cooling Startup Control 120 seconds Approx 550 V Step 4 ON ON OFF OFF OFF 0 V Thermostat signal DC circuit capacitors Fan motor s M1F RXQ6 12A M1F M2F RXQ...

Page 89: ...target evaporation temperature is elevated further to adjust 2 VRT Control When one or more of the connected indoor units are not VRTsmart control applicable models If the required capacity becomes lo...

Page 90: ...be changed For details refer to Details of Setting Mode m2 on page 143 for Cooling Te set based on field setting 2 8 During operation outdoor control will take into account the pressure drop so that...

Page 91: ...eft to right 2 Compressors may operate in any pattern other than those mentioned above according to the operating status Pattern 1 Pattern 2 Pattern 3 M1C No 1 M1C M2C No 1 No 2 No 1 No 2 No 4 No 2 No...

Page 92: ...tion changes Figures listed above are for standard mode Values may differ when the system is set to high static pressure mode or capacity priority mode Compressor Actual rotation speed rps Model name...

Page 93: ...t compressors against the transient decrease of low pressure Cooling Because of common low pressure the following control is performed in the system Normal operation Pc 3 55 MPa High pressure standby...

Page 94: ...error or transient increase of compressor body temperature The following control is performed for each compressor of single unit as well as multi units Inverter compressor Normal operation Discharge p...

Page 95: ...wing control of integrated as well as multi units for each inverter compressor Normal operation Inverter current standby Reduce compressor capacity A B When occurring 3 times within 60 minutes the err...

Page 96: ...s than 0 25 MPa Example The following diagram shows outdoor unit rotation in combination of 3 outdoor units Cooling 1 Master unit slave unit 1 and slave unit 2 in this section are the names for instal...

Page 97: ...hours Furthermore the cumulative oil feed rate is computed from Tc Te and compressor loads Part Name Electric Symbol RXQ6 12A RXQ14A RXQ16 20A Function of Functional Part Inverter compressor 1 M1C Ca...

Page 98: ...ure 1 System is stopped all compressors are stopped 2 System is operating at least one compressor is operating Represents the operating state of each compressor Own Tfin 95 C Own Tfin 85 C OR Elapsing...

Page 99: ...alues of the suction air thermistor and the infrared floor sensor It is difficult to use only suction air temperature control for underfoot air conditioning 8 2 Thermostat Control 8 2 1 Without Option...

Page 100: ...rature around people When the floor temperature is very low operation using the temperature around people may cause the suction air temperature to operate outside of use range To avoid the above condi...

Page 101: ...s determined by the difference between control target temperature and set temperature Thermostat OFF Set 1 The fan keeps rotating at the speed as just before the thermostat off 1 Program dry Thermosta...

Page 102: ...FF Swing Program dry Direction set Thermostat ON Set Thermostat OFF Set Swing set Thermostat ON Swing Thermostat OFF Swing Fan Direction set Set Swing set Swing Conditions FXFSQ When airflow direction...

Page 103: ...t by direct airflow This control works 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...

Page 104: ...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 105: ...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 106: ...Liquid pipe temperature 7 C for 10 minutes continuously The idea of freeze up prevention control Difficult to carry out freeze up prevention operation For comfort suppression of frequent thermostat ON...

Page 107: ...ition 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 condens...

Page 108: ...nsion valve so that superheated degree SH which is calculated from the detection temperature Tg of the gas pipe thermistor R3T and the detection temperature Tl of the liquid temperature thermistor R2T...

Page 109: ...ed on the room temperature condition and time to switch circulation airflow operation and the normal auto airflow rate and direction eco full automatic control 8 11 2 Operational Concept Standard Pane...

Page 110: ...pt Designer Panel 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 0 120 600 04 Pattern 4 120 600 120...

Page 111: ...n Control Mode 126 2 Field Settings for Outdoor Unit 128 2 1 Function Setting 128 2 2 Settings by DIP Switches 129 2 3 Settings by BS Buttons 132 2 4 Normal Mode 134 2 5 Monitor Mode Mode 1 135 2 6 Se...

Page 112: ...select desired mode No by 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 u...

Page 113: ...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 114: ...EST 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 but...

Page 115: ...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 116: ...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 117: ...irflow adjustment 8 6 Compensating the temperature around people Suction air temperature only Priority given on the suction air temperature Standard Priority given on the floor temperature 12 22 0 Opt...

Page 118: ...an conducts the fan residual operation by linking to indoor unit 6 Available for setting when option with the built in human detection and floor temperature detection function is mounted 7 Factory set...

Page 119: ...ories output selection 1 External ON OFF input 2 Thermostat differential changeover 5 Auto restart after power failure reset 6 Airflow setting when cooling thermostat is OFF 11 Compensating the floor...

Page 120: ...temperature is controlled by the suction air thermistor for indoor unit and remote controller thermistor When the Second code No is set to 02 room temperature is controlled by the suction air thermist...

Page 121: ...elected Factory setting Filter Cleaning is not displayed when an Auto clean Panel is connected Mode No First Code No Second Code No Contents 10 20 6 01 Remote controller thermistor control is not perm...

Page 122: ...the following table Note 1 Increasing duration of dry operation degrades the energy efficiency Factory setting Note 2 When group control is enabled all indoor units in the same group have a same set v...

Page 123: ...djust the airflow rate automatically After setting the operation mode to fan enter the field setting mode while operation is stopped and then select the Mode No 21 11 for batch setting set the First C...

Page 124: ...Factory setting 1 4 10 Optional Accessories Output Selection Using this setting operation output signal and abnormal output signal can be provided Output signal is output between terminals X1 and X2 o...

Page 125: ...ailure For the above reasons when the unit is set enabling to utilize Auto restart function after power failure reset utmost care should be paid for the occurrence of the following situation 1 4 14 Ai...

Page 126: ...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 11 01 4 C 02 2 C 03 0 C 04 2 C Environment Operation Mode Probl...

Page 127: ...g in an opposite direction to agitate airflow to reduce temperature irregularity Conventional swing operation all direction synchronized swing can be set onsite Factory setting Mode No First Code No S...

Page 128: ...or 03 1 4 20 External Static Pressure Settings FXMQ PB Factory setting 1 FXMQ40PB cannot be set to 180 or 200 Pa 2 FXMQ50 63 80 100 125PB cannot be set to 30 Pa 3 FXMQ140PB cannot be set to 30 Pa and...

Page 129: ...ending on the installation environment of the indoor unit Cooling Factory setting 1 4 24 Switching Panel Type FXFSQ AR Change this setting depending on the type of the panel connected Factory setting...

Page 130: ...Remote Controller For BRC1E Series only Error code four digits is displayed for limited products Select two digit display if four digit display is not preferred Factory setting 1 4 29 Key Lock Patter...

Page 131: ...t the airflow block is advertently set to ON Ensure that this setting is Disable airflow block when using together with options listed above Factory setting 1 4 31 Room Temperature Display For BRC1E s...

Page 132: ...setting by remote controller can be set and displayed by operation modes 0 through 19 ON OFF control impossible by remote controller Used when you want to turn ON OFF by central remote controller onl...

Page 133: ...l 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...

Page 134: ...d capacity or less 9 Demand 2 Level 1 40 of rated capacity or less 10 Demand 2 Level 2 50 of rated capacity or less 11 Demand 2 Level 3 55 of rated capacity or less 12 Demand 3 Forced thermostat off U...

Page 135: ...r Unit Part 5 Field Settings and Test Operation 129 2 2 Settings by DIP Switches For factory mounted board only DIP switch Setting item Description No Setting DS1 1 DS1 4 ON Not used Do not change the...

Page 136: ...r initialization a test operation is required from outdoor unit hold BS2 SET until indication t01 appears 1 Microcomputer normal monitor This monitor blinks while in normal operation and turns ON or O...

Page 137: ...f switches RXQ6 8A Set DS1 2 DS1 3 DS1 4 and DS2 2 to ON RXQ10A Set DS1 2 DS1 3 DS1 4 DS2 1 and DS2 2 to ON RXQ12A Set DS1 2 DS1 3 DS1 4 and DS2 3 to ON RXQ14A Set DS1 2 DS1 3 DS1 4 DS2 1 and DS2 3 to...

Page 138: ...communication Setting mode Used to make changes to operating status performance settings or address setting Monitor mode Used to verify contents of settings quantity of units current value of some par...

Page 139: ...on for more than 5 sec Normal mode Initial condition Press RETURN BS3 button once Setting item selection SET Setting condition selection SET Press RETURN BS3 button once Setting condition Contents dis...

Page 140: ...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 141: ...gend Segment MODE BS1 MODE BS1 RETURN BS3 RETURN BS3 SET BS2 Checking for description of data Press the SET BS2 button to set the 7 segment display to any of the monitoring items listed in the table b...

Page 142: ...eration state display 1 0 1 In normal operation In low noise operation 0 1 2 Demand operation state display 1 0 2 In normal operation In demand operation 0 1 3 Automatic backup operation setting 1 0 3...

Page 143: ...abnormal 0 1 2 33 Number of abnormal status judgment outdoor unit PCB 1 3 3 Possible 0 15 1 0 5 40 Cooling comfort setting see mode 2 81 1 4 0 Possible 0 3 0 3 42 High pressure MPa 1 4 2 Possible 0 1...

Page 144: ...he indoor unit are not shown on the outdoor display For inspecting error code on indoor unit please consult Display of the remote controller connected to the indoor units If there are no remote contro...

Page 145: ...n 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 OFF Legend Segment MODE BS1 MOD...

Page 146: ...s available from an external input When this configuration is set it is not possible to turn the Eco refrigerant control ON OFF using the remote controller Also depending on the settings low noise ope...

Page 147: ...gress 2 2 9 OFF ON 0 1 30 Demand 1 setting Used to make a change to the targeted power consumption level when the demand 1 control signal is inputted 2 3 0 Level 1 60 Level 2 65 Level 3 70 Level 4 75...

Page 148: ...0 m 0 1 50 Do not change contents 2 5 0 51 Sequence multi outdoor Sequence addressing between master and slave units 2 5 1 Automatic Forced master Forded slave 1 Forced slave 2 0 1 2 3 76 VRTsmart con...

Page 149: ...erature for cooling operation Change the setting in function of required operation method during cooling Default value 2 Te target 6 C The refrigerant temperature is fixed to average indoor evaporatin...

Page 150: ...outdoor can switch automatically to a pre set night time low noise operation level during night time judgement Default value 0 Auto night time low noise operation not active Set 1 use level 1 Set 2 us...

Page 151: ...ve the U V W terminals of the inverter compressor and connect to the inverter checker module If all 6 LEDs blink the transistors switch correctly When the power transistor check mode is interrupted af...

Page 152: ...ity priority can be initiated when certain operation parameters approach the safety setting Raise in high pressure during cooling Raise of discharge pipe temperature Raise of inverter current Raise of...

Page 153: ...To disable permanent compressor operation in case of single module or Master unit of a multi outdoor system this setting allows Default value 0 Compressor operation enabled Field setting Set 1 inverte...

Page 154: ...et manually to same status U7 error will appear 1 Forced Master F1F2 Ind terminals should be connected to indoor units 2 Forced Slave 1 only Q1Q2 terminals should be wired to Master module 3 Forced Sl...

Page 155: ...Te according to setting 2 81 cooling comfort setting m2 90 Indoor unit without power U4 error generation In case an indoor unit needs maintenance or repair on the electric side it is possible to keep...

Page 156: ...pper 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 external control adaptor input 3 Ec...

Page 157: ...evel the low 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 outdoo...

Page 158: ...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 lo...

Page 159: ...e 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 or less...

Page 160: ...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 161: ...e 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 applicable...

Page 162: ...ll front panels in order to not let it be the cause of misjudgment except the electrical component box inspection opening service cover 2 Make sure all field settings you want are set 3 Turn ON the po...

Page 163: ...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 164: ...ality 194 5 7 Electronic Expansion Valve Coil Abnormality Dust Clogging 197 5 8 Humidifier System Abnormality 198 5 9 Auto Grille Unit Error 199 5 10 Capacity Determination Device Abnormality 200 5 11...

Page 165: ...48 Open Phase 262 5 49 Power Supply Insufficient or Instantaneous Abnormality 263 5 50 Check Operation Not Executed 265 5 51 Transmission Error between Indoor Units and Outdoor Units 266 5 52 Transmis...

Page 166: ...ution for maintenance Touch the paint free metal part of the product electrical box lid of the standard model tap bolts of electrical box of anti corrosion and heavy anti corrosion models to release s...

Page 167: ...mpurities SUNISO oil etc 2 Be sure to purge with nitrogen when brazing Properly perform airtightness test and vacuum drying Airtight test pressure 4 0 MPa Charge refrigerant in liquid state 6 Precauti...

Page 168: ...remote controller turns ON the system will be normal These symptoms indicate that the system is controlled so as not to put unreasonable loads on the system Normal operation The system will automatic...

Page 169: ...from resin parts expanding and contracting with temperature changes Normal operation Indoor unit Sounds like trickling or the like are produced from indoor units in the stopped state On VRV systems t...

Page 170: ...nfrared presence sensor detects human presence Check if there are any objects that generate temperature change when moving For example An electric heater with swing function Doors curtains blind switc...

Page 171: ...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 172: ...3 40 0 18 10 0 57 20 1 45 50 3 07 38 0 19 8 0 61 22 1 53 52 3 21 36 0 21 6 0 66 24 1 61 54 3 36 34 0 23 4 0 70 26 1 70 56 3 51 32 0 25 2 0 75 28 1 79 58 3 64 30 0 27 0 0 80 30 1 89 60 3 83 28 0 29 2 0...

Page 173: ...cular model 1 Check if it is error or warning 2 Take corrective action Operation Status Display Abnormal shutdown The system stops operating The operation lamp green starts to blink The message Error...

Page 174: ...abnormality 3 Press MODE button The left 0 upper digit indication of the error code blinks 4 Press UP button or DOWN button to change the error code upper digit until the receiver of the indoor unit...

Page 175: ...mal mode 3 Press MODE button The upper digit blinks Normal mode 1 Press INSPECTION TEST button to enter inspection mode 7 When MODE button is pressed or no button is pressed for 1 minute equipment ret...

Page 176: ...e unit 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...

Page 177: ...core 217 218 E3 l Activation of high pressure switch 219 E4 l Activation of low pressure sensor 221 E5 l Inverter compressor motor lock 223 E7 l Outdoor fan motor abnormality 225 E9 l Electronic expan...

Page 178: ...ssion error between remote controller and indoor unit 269 U7 l Transmission error between outdoor units 270 U8 l Transmission error between main and sub remote controllers 275 U9 l Other indoor units...

Page 179: ...he brush unit S shaped pipe and dust box Furthermore check for any stains of the light receiving and emitting parts of the infrared unit AH 06 Air filter rotation error when the self cleaning decorati...

Page 180: ...r are touching each other and if any foreign matter on the PCB is causing a short circuit CE 04 Infrared floor sensor error An abnormality other than the ones mentioned above has been detected Check i...

Page 181: ...itch activated Master E3 21 High pressure switch activated Slave 1 E3 22 High pressure switch activated Slave 2 E4 01 Low pressure error Master Refer to the E4 flowchart and make a diagnosis based on...

Page 182: ...n the Error code shown to the left F4 03 Wet alarm for compressor M2C Master F4 04 Wet alarm for compressor M1C Slave 1 F4 05 Wet alarm for compressor M2C Slave 1 F4 06 Wet alarm for compressor M1C Sl...

Page 183: ...4 Defective compressor body thermistor for M1C Open Slave 2 J3 45 Defective compressor body thermistor for M1C Short Slave 2 J3 47 Defective compressor body thermistor for M2C Open Master J3 48 Defect...

Page 184: ...rt Slave 2 L1 01 IPM error Compressor M1C Master The inverter PCB may be defective or a PCB other than the specified is mounted Refer to the L1 flowchart and make a diagnosis based on the Error code s...

Page 185: ...e left L4 02 Radiation fin temperature rise Inverter PCB for M1C Slave 1 L4 03 Radiation fin temperature rise Inverter PCB for M1C Slave 2 L4 06 Radiation fin temperature rise Fan M1F Master L4 07 Rad...

Page 186: ...erter PCB 1 Slave 1 LC 16 Transmission error Between outdoor units inverter PCB 1 Slave 2 LC 19 Transmission error Between outdoor units fan PCB 1 Master LC 20 Transmission error Between outdoor units...

Page 187: ...Slave 1 Inverter PCB 1 P4 05 Defective radiation fin thermistor Slave 2 Inverter PCB 1 P4 06 Defective radiation fin thermistor Master Inverter PCB 2 P4 07 Defective radiation fin thermistor Slave 1 I...

Page 188: ...rge operation not yet executed U4 01 Transmission error between indoor unit and outdoor unit Refer to the U4 flowchart and make a diagnosis based on the Error code shown to the left U4 03 Transmission...

Page 189: ...ivation of external protection device Improper field setting Defective indoor unit PCB Troubleshooting Activation of external protection device External protection device is connected to terminals T1...

Page 190: ...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 191: ...ors 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 connector or flo...

Page 192: ...pump or check for dirt etc YES YES NO NO The 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 minut...

Page 193: ...ase 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 the...

Page 194: ...e the foreign matter YES YES NO Are there any foreign matter around the fan YES NO Is the resistance between the pins less than the judgement criteria Disconnect the connector from the fan motor and t...

Page 195: ...osed Causes Clogged foreign 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...

Page 196: ...6 Service Diagnosis 1 Check also if the relay connector between the indoor unit main PCB and the fan motor are correctly connected YES Replace the fan motor Replace the indoor unit main PCB A1P The HA...

Page 197: ...osition 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 RPM is less than a certain level for...

Page 198: ...matter around the fan Connect the connector properly Replace the indoor fan motor Replace the indoor fan motor Connect the connector properly CHECK 16 Caution Be sure to turn off the power switch bef...

Page 199: ...n motor and check the resistance Theresistance amongU V andWareunbalancedor shortcircuited 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...

Page 200: ...AR Applicable Models 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 d...

Page 201: ...operly 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 b...

Page 202: ...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 switch before co...

Page 203: ...R2T 8 C Temperature of liquid pipe R2T shows fixed degrees or below Supposed Causes Defective electronic expansion valve coil Defective indoor unit control PCB Defective relay cables Troubleshooting C...

Page 204: ...essor 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 Defective indo...

Page 205: ...n 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 Troublesho...

Page 206: ...tions The 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 n...

Page 207: ...ission 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 Sup...

Page 208: ...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 209: ...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 YES Is t...

Page 210: ...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 c...

Page 211: ...onnected 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 i...

Page 212: ...d thermistor CHECK 11 Refer to page 295 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 213: ...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 Has the indoor unit main PCB...

Page 214: ...onnection 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 establi...

Page 215: ...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 mot...

Page 216: ...or connector CE 01 Defective infrared floor sensor Temperature compensation circuit disconnection CE 02 Defective infrared floor sensor Temperature compensation short circuit CE 03 Defective infrared...

Page 217: ...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 218: ...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 219: ...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 220: ...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 221: ...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 222: ...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 223: ...ing 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 temporary oil r...

Page 224: ...nnection of connector X101A Wiring disconnection Defective outdoor unit main PCB Troubleshooting NO YES Is the system reset to normal Is X101A connected The error is considered to have resulted from e...

Page 225: ...Troubleshooting NO YES YES Replace the high pressure switch RXQ6 14A S1PH RXQ16 20A S1PH S2PH Remedy defective points Replace the high pressure sensor S1NPH YES Are the above 3 points OK Does the erro...

Page 226: ...K 12 Refer to page 298 Replace the outdoor unit main PCB A1P NO YES Is the high pressure checked by the Service Checker same as the measurement of the high pressure gauge The high pressure sensor is n...

Page 227: ...pressure CHECK 12 YES NO NO YES Are the characteristics of the low pressure sensor normal 1 NO YES 1 Mount a pressure gauge on the low pressure service port 2 Reset the operation using the remote con...

Page 228: ...Troubleshooting by Error Code SiAF341904E 222 Part 6 Service Diagnosis Reference Reference CHECK 2 Refer to page 288 CHECK 12 Refer to page 298...

Page 229: ...p valve is not opened Troubleshooting Make proper wire connections Make proper wire connections NO NO NO NO YES YES YES YES Power OFF Is the connection line of the relevant compressor normal Are wire...

Page 230: ...e equalization failure may have occurred Check for the refrigerant system YES YES NO Replace the inverter PCB 1 NO The error recurs at startup Continue operation The error could have resulted from ins...

Page 231: ...C during the fan motor runs Error Decision Conditions When overcurrent is detected from the inverter PCB or the fan PCB Detecting overcurrent 4 times will shut down the system When the fan revolutions...

Page 232: ...itch before connecting or disconnecting connectors or parts may be damaged A Check for any wire connection errors in 2 units of fan motors Fan motor 1 Power supply cables and signal cables are all whi...

Page 233: ...has lost balance or short circuit is caused between U V W phases Check for the connector power supply cable of the fan motor CHECK 16 Replace the fan PCB 1 YES The HAP lamp on A3P A6P blinks but that...

Page 234: ...igate 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 unit main PCB A1P is connected CHECK 18 The...

Page 235: ...ture becomes abnormally high i e 135 C or more When discharge pipe temperature sharply rises remains at 120 C or more for a period of consecutive 10 minutes When compressor surface temperature becomes...

Page 236: ...rature Connect the Service Checker Reset the system operation and then restart it Are the characteristics of the discharge pipe and compressor body thermistors normal 1 CHECK 11 All thermistors are no...

Page 237: ...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 238: ...of the indoor units NO YES NO Replace the indoor electronic expansion valve Replace the relevant thermistor YES YES Caution Be sure to turn off the power switch before connecting or disconnecting conn...

Page 239: ...ercharged Disconnection of outdoor air thermistor Disconnection of heat exchanger liquid pipe thermistor Disconnection of subcooling heat exchanger liquid pipe thermistor Troubleshooting CHECK 11 Refe...

Page 240: ...on between PCBs is disabled during the compressor stops running Supposed Causes Defective connection of harnesses between PCBs Defective outdoor unit main PCB Defective inverter PCB A3P A6P Troublesho...

Page 241: ...nnector Defective fan PCB A4P A7P Troubleshooting Replace the defective fan motor NO YES Check for fan motor applicable to the error code H7 while in monitor mode Sub code Fan PCB A7P H07 21 Master H7...

Page 242: ...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 243: ...r R1T X18A R1T X18A J3 Discharge pipe thermistor for M1C R21T X19A Group connector R21T X19A Group connector Discharge pipe thermistor for M2C R22T Compressor body thermistor for M1C R8T R8T Compresso...

Page 244: ...page 298 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 245: ...page 298 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 246: ...etected 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 Wh...

Page 247: ...r PCB 2 and the fan PCB 3 Replace the inverter PCB 2 1 RXQ6 14A M1C RXQ16 20A M1C M2C 2 RXQ6 14A A3P RXQ16 20A A3P A6P 3 RXQ6 12A A4P RXQ14 20A A4P A7P NO YES Turn OFF the power supply once and then t...

Page 248: ...y 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 disconnectio...

Page 249: ...ubleshooting Subcode L4 01 02 03 09 10 11 Continue operation Field factor Power module temperature may have risen due to high outdoor air temperature Turn ON the power supply and then press the ON but...

Page 250: ...re NO Replace the fan PCB RXQ6 12A A4P RXQ14 20A A4P A7P YES Turn ON the power supply Does the error recur when operation starts Check the cooling conditions of the inverter heat sink 1 Is the insulat...

Page 251: ...shooting Compressor model A A JT1GUVDYR 41 9 JT16KCVDYR 64 2 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 Recti...

Page 252: ...esults in the recurrence of the error Continue operation The error could have resulted from causes such as instantaneous power failure NO The insulation resistance of the relevant compressor is 100 k...

Page 253: ...Defective inverter PCB Troubleshooting Compressor model A A B A JT1GUVDYR 21 0 17 6 JT16KCVDYR 30 0 27 5 Power OFF Open the stop valve YES NO Is the stop valve open YES YES Are wiring and wire connec...

Page 254: ...he recurrence of the error Continue operation The error could have resulted from causes such as instantaneous power failure NO A NO YES The insulation resistance of the relevant compressor is 1 M or l...

Page 255: ...de L9 Method of Error Detection Detect error according to the signal waveform of compressor Error Decision Conditions When compressor startup operation has not been completed Supposed Causes The stop...

Page 256: ...unit is out of power supply for more than 6 hours Solve the refrigerant stagnation Power should be supplied for more than 6 hours YES Caution Be sure to turn off the power switch before connecting or...

Page 257: ...YES NO The internal wiring of the compressor coil is defective Replace the compressor 1 YES Is the insulation resistance of the relevant compressor 100 k or more Refrigerant is stagnated The unit is o...

Page 258: ...ain PCB transmission block Defective noise filter External factors e g noise Defective reactor Defective inverter compressor Defective fan motor Troubleshooting Properly connect the harness NO YES Cau...

Page 259: ...nnect the connector NO YES Is the connector between the outdoor unit main PCB and the inverter PCB securely connected NO Replace the outdoor unit main PCB A1P YES The fuse of the noise filter PCB has...

Page 260: ...t voltage 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 displ...

Page 261: ...r defective connection of noise filter Replace the inverter PCB RXQ6 14A A3P RXQ16 20A A3P A6P YES Explanation to users Use the document Notice of Inspection Results attached to spare part Hand the No...

Page 262: ...stor Defective reactor surface thermistor Defective inverter PCB Troubleshooting Check in Monitor Mode For the models equipped with 2 compressors check the compressor M1C or M2C applicable to the erro...

Page 263: ...pressor stops running 1 Radiation 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 circui...

Page 264: ...CB 1 1 RXQ6 14A A3P RXQ16 20A A3P A6P Replace the compressor RXQ6 14A M1C RXQ16 20A M1C M2C Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be d...

Page 265: ...ing Check in Monitor Mode For the models equipped with 2 compressors check the compressor M1C or M2C applicable to the error code PJ while in monitor mode of the outdoor unit Has the DIP switch settin...

Page 266: ...shooting CHECK 2 Refer to page 288 CHECK 3 Refer to page 289 Replace the thermistor NO Replace the outdoor unit main PCB A1P YES YES Are the characteristics of the suction air thermistor normal NO Are...

Page 267: ...SiAF341904E Troubleshooting by Error Code Part 6 Service Diagnosis 261 Reference CHECK 7 Refer to page 293...

Page 268: ...perly 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 between the terminal b...

Page 269: ...or Defective connection of signal cable Troubleshooting Check in Monitor Mode For the models equipped with 2 compressors check the compressor M1C or M2C applicable to the error code U2 while in monito...

Page 270: ...d the compressor and the fan motor may have been damaged Replace the inverter PCB 1 If the inverter PCB gets severely damaged check for the compressor Continue operation The error could have resulted...

Page 271: ...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 272: ...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 Suppo...

Page 273: ...he outdoor outdoor transmission wiring Does the system normally operate with a single transmission line U4 01 1 OFF ON BLINK SEG1 SEG2 SEG3 1 2 Correct the voltage Replace the fuse Modify the transmis...

Page 274: ...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 275: ...e 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 pow...

Page 276: ...if transmission between outdoor units is normal Error Decision Conditions When transmission is not carried out normally for a certain amount of time Supposed Causes Connection error of transmission wi...

Page 277: ...ode 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 Flowchart 3 Transmission error between master and slave 1 Go...

Page 278: ...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 279: ...mission 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 outdo...

Page 280: ...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 trans...

Page 281: ...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 remote...

Page 282: ...units 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 Troubleshooti...

Page 283: ...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 Troubleshooting Ensure the sub code or the l...

Page 284: ...tdoor 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 Y...

Page 285: ...units Replace the outdoor unit main PCB A1P Diagnosis Flowchart 5 Diagnosis Flowchart 4 Is the multi combination of outdoor units proper NO Was the outdoor unit main PCB replaced with a spare PCB Rep...

Page 286: ...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 287: ...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 288: ...up 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...

Page 289: ...s section Is the voltage between the terminals F1 and F2 in the range of 15 2 to 17 6 VDC Replace the centralized controller Centralized controller Normal OK Correct the wiring NG A NO Correct the wir...

Page 290: ...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 291: ...r unit models Error Code UH Method of Error Detection Detect an indoor unit with no auto address setting Error Decision Conditions The error decision is made as soon as the abnormality aforementioned...

Page 292: ...sconnect the outdoor outdoor unit transmission 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 and hold the RET...

Page 293: ...of the pressure sensor Defective high pressure control In cooling High suction air temperature of the condenser High suction air temperature of outdoor unit Short circuit High outdoor air temperature...

Page 294: ...and connection Check for the thermistor resistance and connection Are the voltage characteristics normal Low suction air temperature of the evaporator Low suction air temperature of indoor unit Short...

Page 295: ...o shaft damage Superheat due to defective compressor Indoor unit electronic expansion valve failure Irregular piping length Bend collapse Including moisture choke Stop valve is closed Hot gas circuit...

Page 296: ...ck mode Preparation 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 Crite...

Page 297: ...is 291 PCB and Circuit Diagram P3 U V W N3 J1 J2 J3 P1 P1 P2 IGBT X11A U V W L1 L2 L3 X10A DM K2 P3 N3 J1 J2 J3 Since the appearance of PCB shown in this outline drawing is different from the actual a...

Page 298: ...uperheating degree of suction gas lowers or wet operation is performed Consequently the compressor becomes lower in discharge pipe temperature despite of pressure loads 3 The subcooling degree of cond...

Page 299: ...ng capacity Cooling High pressure Low pressure Frequency The opening degree of the indoor unit electronic expansion valve becomes larger Either of the electronic expansion valves becomes fully open Fr...

Page 300: ...f 100 7 kPa 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 refrigerant...

Page 301: ...air thermistor FXFSQ AR Type C Type A Type A FXMQ PB Type B Type J FXMQ AR FXAQ P Thermistor Type R1T Outdoor air thermistor E R21T Discharge pipe thermistor for M1C H R22T Discharge pipe thermistor...

Page 302: ...4 65 6705 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 4...

Page 303: ...20 0395 198 4674 20 0949 30 16 1326 160 2244 16 1860 35 13 0683 130 0697 13 1222 40 10 6490 106 1517 10 7042 45 8 7269 87 0725 8 7834 50 7 1905 71 7703 7 2479 55 5 9524 59 4735 6 0131 60 4 9536 49 51...

Page 304: ...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 305: ...blocks the outdoor outdoor unit transmission wiring has no broken wires in it If there is no continuity the transmission wiring may have broken wires With the outdoor outdoor unit terminal of the Out...

Page 306: ...With the indoor outdoor unit terminal of the Outdoor Unit C short circuited identify the place with continuity in the transmission wiring of the Indoor Unit b transmission wiring of the Indoor Unit c...

Page 307: ...heck that the values are balanced and there is no short circuiting while connector or relay connector is disconnected Indoor unit FXMQ50 140PB Measurement of power wire connector Remove the X1A connec...

Page 308: ...gnal 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 309: ...ck the continuity to judge the condition The normal products will show the following conditions Outdoor unit RXQ6 12A RXQ14 20A White 1 Yellow 2 Orange 3 Blue 4 5 Red 6 X22A Y2E Orange 1 Red 2 Yellow...

Page 310: ...5 Orange 1 Gray 6 Yellow 3 1 3 Red 2 Black 4 2 4 M Measuring points Judgment criteria 1 2 No continuity 1 3 92 1 6 46 2 4 92 2 6 46 White 1 Red 5 Orange 3 1 3 2 Yellow 6 Brown 4 Blue 2 4 M White 1 Ye...

Page 311: ...ck Part 6 Service Diagnosis 305 FXMQ AR White 1 Red 6 Orange 3 1 3 2 Yellow 4 Blue 2 4 M Orange White Yellow Red 1 2 6 Blue 3 4 5 Measuring points Judgment criteria 1 2 No continuity 1 3 300 1 6 150 2...

Page 312: ...SiAF341904E 306 Part 7 Appendix 1 Wiring Diagrams 307 1 1 Outdoor Unit 307 1 2 VRV Indoor Unit 310 Part 7 Appendix...

Page 313: ...SiAF341904E Wiring Diagrams Part 7 Appendix 307 1 Wiring Diagrams 1 1 Outdoor Unit RXQ6 8 10 12ARY1 3D112175E...

Page 314: ...Wiring Diagrams SiAF341904E 308 Part 7 Appendix RXQ14ARY1 2D112174G...

Page 315: ...SiAF341904E Wiring Diagrams Part 7 Appendix 309 RXQ16 18 20ARY1 2D112524F...

Page 316: ...Wiring Diagrams SiAF341904E 310 Part 7 Appendix 1 2 VRV Indoor Unit 1 2 1 Ceiling Mounted Cassette Round Flow with Sensing Type FXFSQ25 32 40 50 63 80 100 125 140ARV1 3D121473...

Page 317: ...SiAF341904E Wiring Diagrams Part 7 Appendix 311 1 2 2 Auto Grille Panel BYCQ125EASF for FXFSQ 3D108035...

Page 318: ...Wiring Diagrams SiAF341904E 312 Part 7 Appendix 1 2 3 Ceiling Mounted Duct Type FXMQ40 50 63 80 100 125 140PBV1 3D110450B...

Page 319: ...SiAF341904E Wiring Diagrams Part 7 Appendix 313 FXMQ40 50 63 80 100ARV1 3D112427A...

Page 320: ...Wiring Diagrams SiAF341904E 314 Part 7 Appendix 1 2 4 Wall Mounted Type FXAQ20 25 32PVE FXAQ40 50 63PVER1 C 3D076498B...

Page 321: ...t will be used This statement does not purport to exclude restrict or modify the application of any local legislation z z Ask a qualified installer or contractor to install this product Do not try to...

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