Daikin REYQ-TA Series Service Manual Download | Manualshive

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SiUS371614E

Protection Control

Functions and Control

76

6.3

Discharge Pipe Protection Control

This discharge pipe protection control is used to protect the compressor internal temperature
against an error or transient increase of discharge pipe temperature.

Normal Operation

3-step down

9-step up

9-step down

3-step up

21-step down

After 30 seconds

After 20 seconds

After 20 seconds

After 30 seconds

HTdi > 115˚C

(239˚F)

HTdi > 130˚C

(266˚F)

HTdi < 105˚C

(221˚F)

HTdi < 110˚C

(230˚F)

HTdi > 115˚C

(239˚F)

HTdi > 120˚C

(248˚F)

HTdi > 125˚C

(257˚F)

Compressor step: 1

After 20 seconds

HTdi > 135˚C (275˚F)
HTdi > 120˚C (248˚F)

continues for 10 minutes

OR

HTdi: Value of inverter compressor

discharge pipe temperature
(Tdi) compensated with
outdoor air temperature

Upper limit compressor step:
max (Max. Step)

Current

step

maintained

Discharge pipe temperature standby
(3 times within 100 minutes)

Abnormal stop

(

F3

is displayed)

Discharge pipe temperature

standby

(2 times within 100 minutes)

After 30

seconds

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87
88
89
90
91
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Summary of Contents for REYQ-TA Series

Page 1: ...Service Manual SiUS371614E REYQ72 456TAYDU REYQ72 456TATJU Heat Recovery 60 Hz...

Page 2: ...4 3 5 3 4 3 5 3 3 2 3 4 7 4 5 Outdoor air processing unit FXMQ MF EDUS39 900A F10 4 Energy recovery ventilator VAM G EDUS711116A 2 Branch selector unit Single Multi EDUS391434 B 11 27 Option list VRV...

Page 3: ...nit 7 3 Combination of Outdoor Units 8 4 Capacity Range 9 4 1 Combination Ratio 9 4 2 Outdoor Unit Combinations 9 4 3 Limitation of Capacity Index for Heat Recovery 10 Part 2 Refrigerant Circuit 11 1...

Page 4: ...tup Control in Cooling 61 4 2 Startup Control in Heating 62 5 Basic Control 63 5 1 Normal Operation 63 5 2 Compressor PI Control 64 5 3 Operation Priority and Rotation of Compressors 64 5 4 Compressor...

Page 5: ...14 1 2 Wireless Remote Controller 116 1 3 Simplified Remote Controller 117 1 4 Setting Contents and Code No for Indoor Units 118 2 Field Setting from Outdoor Unit 136 2 1 Accessing the BS Buttons on t...

Page 6: ...or Abnormality 200 3 23 Humidity Sensor System Abnormality 201 3 24 Infrared Presence Floor Sensor Error 202 3 25 Remote Controller Thermistor Abnormality 207 3 26 Outdoor Unit Main PCB Abnormality 20...

Page 7: ...ombination of Indoor Unit and Outdoor Unit Indoor Unit and Remote Controller 264 3 62 Incorrect Electric Heater Capacity Setting 268 3 63 Address Duplication of Centralized Controller 269 3 64 Transmi...

Page 8: ...ding Safety of Workers Warning Do not store the equipment in a room with fire sources e g naked flames gas appliances electric heaters Be sure to disconnect the power cable from the socket before disa...

Page 9: ...equipment failure Do not mix air or gas other than the specified refrigerant R 32 R 410A R 22 in the refrigerant system If air enters the refrigerating system excessively high pressure results causin...

Page 10: ...ble and lead wires are scratched or have deteriorated be sure to replace them Damaged cable and wires may cause an electrical shock excessive heat generation or fire Do not use a joined power cable or...

Page 11: ...work must be stopped be sure to pump down and close the service valve to prevent refrigerant gas from leaking into the room Refrigerant gas itself is harmless but it may generate toxic gases when it...

Page 12: ...has corroded replace it A corroded installation platform or frame may cause the unit to fall resulting in injury Check the earth grounding and repair it if the equipment is not properly earthed ground...

Page 13: ...ion 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 A note provides...

Page 14: ...1 4 Air Treatment Equipment 4 1 5 Branch Selector Unit 4 2 External Appearance 5 2 1 Indoor Unit 5 2 2 DOAS Unit 6 2 3 Outdoor Unit 6 2 4 Air Treatment Equipment 7 2 5 Branch Selector Unit 7 3 Combin...

Page 15: ...M 24M Ceiling Mounted Duct Type Middle and High Static Pressure FXMQ 07PB 09PB 12PB 15PB 18PB 24PB 30PB 36PB 48PB 54PB Ceiling Mounted Duct Type FXMQ 72M 96M Ceiling Suspended Type FXHQ 12M 24M 36M Wa...

Page 16: ...t 3 REYQ120TAYDU REYQ168TAYDU REYQ168TAYDU Model name REYQ432TAYDU REYQ456TAYDU Outdoor unit 1 REYQ144TAYDU REYQ144TAYDU Outdoor unit 2 REYQ144TAYDU REYQ144TAYDU Outdoor unit 3 REYQ144TAYDU REYQ168TAY...

Page 17: ...No interchangeability with BSVQ36 60 96PVJU VJ 1 phase 208 230 V 60 Hz Multi Branch Selector Unit for Heat Recovery Note No interchangeability with BSV4 6Q36PVJU VJ 1 phase 208 230 V 60 Hz Series Mod...

Page 18: ...nd flow type FXFQ P Shown with BYCP125K W1 Ceiling suspended type FXHQ M 4 way ceiling mounted cassette 2 2 type FXZQ M Shown with BYFQ60B8W1U Wall mounted type FXAQ P 4 way blow ceiling suspended typ...

Page 19: ...6 2 2 DOAS Unit 2 3 Outdoor Unit Single Outdoor Unit Double Outdoor Unit DVSV05 10 12 REYQ96 120 144 168TAYDU REYQ96 120 144 168TATJU REYQ72TAYDU REYQ72TATJU REYQ192TAYDU REYQ192TATJU REYQ216 240 264...

Page 20: ...r Unit 2 4 Air Treatment Equipment 2 5 Branch Selector Unit REYQ360 384 408 432 456TAYDU REYQ360 384 408 432 456TATJU Outdoor air processing unit FXMQ MF Energy recovery ventilator VAM series VAM G Si...

Page 21: ...ber of units Module Outdoor Unit Multi Connection Piping Kit 1 Ton HP kW 72 96 120 144 168 6 7 5 21 1 1 O 8 10 28 1 1 O 10 12 5 35 2 1 O 12 15 42 2 1 O 14 17 5 49 2 1 O 16 20 56 3 2 O O BHFP26P100U 18...

Page 22: ...XDQ FXMQ PB FXAQ When using only FXTQ oratleastone FXFQ07 or FXFQ09 Other indoor unit models FXMQ MF When FXMQ MF is only connected When FXMQ MF and indoor units are connected Single outdoor units 50...

Page 23: ...um number of connectable indoor units 20 30 40 41 41 Maximum number of connectable indoor units per branch 5 5 5 5 5 Number of branches 4 6 8 10 12 Maximum capacity index of connectable indoor units 1...

Page 24: ...door Air Processing Unit 18 1 4 Branch Selector Unit 19 2 Functional Parts Layout 25 2 1 REYQ72TAYDU 25 2 2 REYQ96 120TAYDU 26 2 3 REYQ144 168TAYDU 27 2 4 REYQ72TATJU 28 2 5 REYQ96 120TATJU 29 2 6 REY...

Page 25: ...ure 15 S1NPL Low pressure sensor Used to detect the low pressure 16 S1PH High pressure switch For M1C This functions when pressure increases to stop operation and avoid high pressure increase in the f...

Page 26: ...pansion valve Capillary tube Liquid Receiver Fusible plug Pressure regulating valve Solenoid valve Check valve Electronic expansion valve Check valve Check valve Capillary tube Electronic expansion va...

Page 27: ...is functions when pressure increases to stop operation and avoid high pressure increase in the fault operation 20 S2PH High pressure switch For M2C 21 Pressure regulating valve Liquid pipe This is use...

Page 28: ...Solenoid valve Capillary tube Fusible plug Pressure regulating valve Check valve Check valve Capillary tube Electronic expansion valve Electronic expansion valve Electronic expansion valve Heat sink...

Page 29: ...ree control while in heating 4 Gas pipe thermistor R3T R3T R3T Used for gas superheated degree control while in cooling 5 Discharge air thermistor R4T Used for discharge air temperature control FXFQ T...

Page 30: ...frigerant Circuit SiUS371614E 17 Refrigerant Circuit FXMQ PB FXTQ TA Indoor heat exchanger Fan Filter Filter 4 2 1 3 Gas piping connection port Liquid piping connection port C 4D034245P C 4D068194 4 1...

Page 31: ...ressure from high to low in bypassing hot gas 4 R1T Suction air thermistor Used to turn ON or OFF the thermostat 5 R2T Liquid pipe thermistor Used to control the opening degree of electronic expansion...

Page 32: ...Opens while in cooling Max 760 pulse 3 Electronic expansion valve EVSC Y1E In simultaneous cooling and heating operation it is used to subcooling liquid refrigerants when an indoor unit downstream of...

Page 33: ...nic Expansion Valve Subcooling Electronic Expansion Valve Subcooling Electronic Expansion Valve Subcooling Electronic Expansion Valve HP LP gas Electronic Expansion Valve Suction Electronic Expansion...

Page 34: ...id pipe connection port Suction gas pipe connection port HP LP gas pipe connection port Gas pipe connection port Liquid pipe connection port Gas pipe connection port Liquid pipe connection port Gas pi...

Page 35: ...pipe connection port Gas pipe connection port Liquid pipe connection port Gas pipe connection port Liquid pipe connection port Gas pipe connection port Liquid pipe connection port Gas pipe connection...

Page 36: ...nsion Valve HP LP gas Electronic Expansion Valve Suction Electronic Expansion Valve HP LP gas Electronic Expansion Valve Suction Electronic Expansion Valve HP LP gas Electronic Expansion Valve Suction...

Page 37: ...iquidpipe connectionport Gaspipe connectionport Liquidpipe connectionport Gaspipe connectionport Liquidpipe connectionport Gaspipe connectionport Liquidpipe connectionport Gaspipe connectionport Liqui...

Page 38: ...Y6S Thermistor Heat exchanger gas lower R9T Thermistor Heat exchanger gas upper R8T Four way valve HP LP gas Y4S Thermistor M1C discharge R2T Thermistor Suction R10T Solenoid valve DS oil return Y1S...

Page 39: ...olenoid valve DS oil return 2 Y2S Solenoid valve Liquid shutoff Y3S Electronic expansion valve Refrigerant cooling Y5E Thermistor Outdoor air R1T Fan motor M2F Four way valve HP LP gas Y4S Low pressur...

Page 40: ...e DS oil return 2 Y2S Solenoid valve Liquid shutoff Y3S Electronic expansion valve Refrigerant cooling Y5E Fan motor M2F Four way valve HP LP gas Y4S Low pressure sensor S1NPL Thermistor Deicer R11T T...

Page 41: ...e Subcooling heat exchanger Y2E Four way valve Heat exchanger lower Y5S Four way valve Heat exchanger upper Y6S Thermistor Heat exchanger gas lower R9T Thermistor Heat exchanger gas upper R8T Four way...

Page 42: ...Heat exchanger upper Y6S Thermistor Heat exchanger gas upper R8T Thermistor Suction R10T Thermistor M2C discharge R22T Thermistor Outdoor air R1T Fan motor M2F Four way valve HP LP gas Y4S Low pressur...

Page 43: ...ure sensor S1NPH Solenoid valve DS oil return 1 Y1S Solenoid valve DS oil return 2 Y2S Solenoid valve Liquid shutoff Y3S Fan motor M2F Four way valve HP LP gas Y4S Low pressure sensor S1NPL Thermistor...

Page 44: ...ic Expansion Valve EVL Filter Filter Filter Filter Indoor Unit Thermostat ON Cooling Unit ON Fan ON Indoor unit Operation Check valve Check valve Filter SV Filter Filter Fan Filter M Filter Filter Fil...

Page 45: ...ing Unit ON 192 pulse 0 pulse Fan LL Thermostat ON Heating Unit ON Fan ON Indoor unit Operation Check valve Check valve Filter SV Filter Filter Fan Filter M Filter Filter Filter S1NPH Filter S1PH Filt...

Page 46: ...hermostat OFF Heating Unit Heating Unit ON Fan ON Thermostat ON Cooling Unit ON Fan ON Indoor unit Operation Check valve Check valve Filter SV Filter Filter Fan Filter M Filter Filter Filter S1NPH Fil...

Page 47: ...lve Capillary tube Electronic expansion valve Electronic expansion valve Heat sink Check valve Oil separator Capillary tube Solenoid valve M1C High pressure switch High pressure sensor Four way valve...

Page 48: ...Fan OFF Heating Unit Heating Unit ON 224 pulse Fan LL Thermostat ON Heating Unit ON Fan ON Indoor unit Operation Check valve Check valve Filter SV Filter Filter Fan Filter M Filter Filter Filter S1NPH...

Page 49: ...ON 224 pulse Fan ON Heating Unit Heating Unit ON Fan ON Thermostat ON Cooling Unit ON Fan ON Indoor unit Operation Check valve Check valve Filter SV Filter Filter Fan Filter M Filter Filter Filter S1N...

Page 50: ...nsion valve Electronic expansion valve Electronic expansion valve Heat sink Four way valve Double tube heat exchanger Four way valve Low pressure sensor Dual pressure gas pipe Suction gas pipe Fusible...

Page 51: ...nsion valve Electronic expansion valve Heat sink Four way valve Double tube heat exchanger Four way valve Low pressure sensor Dual pressure gas pipe Suction gas pipe Fusible plug Capillary tube Charge...

Page 52: ...ctronic expansion valve Electronic expansion valve Heat sink Four way valve Double tube heat exchanger Four way valve Low pressure sensor Dual pressure gas pipe Suction gas pipe Fusible plug Capillary...

Page 53: ...ronic expansion valve Electronic expansion valve Heat sink Four way valve Double tube heat exchanger Four way valve Low pressure sensor Dual pressure gas pipe Suction gas pipe Fusible plug Capillary t...

Page 54: ...lectronic expansion valve Electronic expansion valve Heat sink Four way valve Double tube heat exchanger Four way valve Low pressure sensor Dual pressure gas pipe Suction gas pipe Fusible plug Capilla...

Page 55: ...xpansion valve Electronic expansion valve Electronic expansion valve Heat sink Four way valve Double tube heat exchanger Four way valve Low pressure sensor Dual pressure gas pipe Suction gas pipe Fusi...

Page 56: ...d Functions 45 2 1 BRC1E73 45 2 2 Wireless Remote Controller 47 3 MAIN SUB Setting 48 3 1 BRC1E73 48 3 2 Wireless Remote Controller 49 4 Centralized Control Group No Setting 50 4 1 BRC1E73 50 4 2 Wire...

Page 57: ...ller 44 1 Applicable Models Series Wired remote controller Wireless remote controller Navigation FXFQ T BRC1E73 FXFQ P FXZQ M BRC7E830 FXUQ P FXEQ P FXDQ M BRC4C82 FXMQ PB FXMQ M FXHQ M BRC7E83 FXAQ P...

Page 58: ...o press the buttons on the remote controller damage may result 1 Operation mode selector button Press this button to select the operation mode of your preference Available modes vary with the indoor u...

Page 59: ...ghlight the next items on the right hand side Each screen is scrolled in the right hand direction 7 Left button W Used to highlight the next items on the left hand side Each screen is scrolled in the...

Page 60: ...fan speed When the INSPECTION TEST button is pressed the display shows the system mode is in 13 14 15 16 17 TIMER RESERVE CANCEL BUTTON AIR FLOW DIRECTION ADJUST BUTTON OPERATION MODE SELECTOR BUTTON...

Page 61: ...controller from MAIN to SUB proceed as follows The designation of the main and sub remote controllers can be swapped Note that this change requires turning the power OFF and then ON again Service set...

Page 62: ...less Remote Controller The address for the wireless remote controller is factory setting to 1 To change this setting proceed as follows 1 Hold down the button and the button for at least 4 seconds to...

Page 63: ...t and then press the Menu OK button Press the Cancel button once Service settings menu is displayed Item 2 is displayed Item 2 is displayed Item 2 is displayed Basic screen is displayed Press and hold...

Page 64: ...the operation manual for maintenance Group Address Group Select Group Address and then press the Menu OK button Select Group Address Group and then press the Menu OK button Press the Cancel button onc...

Page 65: ...INSPECTION TEST button for 4 seconds or more to enter field setting mode 2 Set mode No 00 with MODE button 3 Set the group No for each group with UP button or DOWN button 4 Enter the selected group n...

Page 66: ...played once for about 1 minute on the liquid crystal display This is not an operative fault Centralized Remote Controller F1 F2 F1 F2 F1 F2 F1 F2 P1 P2 RC RC RC RC RC F1 F2 P1 P2 F1 F2 P1 P2 F1 F2 P1...

Page 67: ...ressor 2 operation Indoor Unit Status 1 Unit No Select the Unit No you want to check 2 FAN Fan tap 1 3 Speed Fan speed rpm 2 4 FLAP Airflow direction 5 EV Degree that electronic expansion valve is ope...

Page 68: ...ower supply frequency Hz 4 EV1 Degree that electronic expansion valve is open pulse 5 SV1 Solenoid valve ON OFF 6 Th1 7 Th2 8 Th3 9 Th4 10 Th5 11 Th6 Forced Defrost 1 Forced defrost ON Enables the for...

Page 69: ...ic Expansion Valve PI Control 69 5 6 Step Control of Outdoor Fans 70 5 7 Heat Exchanger Control 72 6 Protection Control 73 6 1 High Pressure Protection Control 73 6 2 Low Pressure Protection Control 7...

Page 70: ...03 9 9 Hot Start Control In Heating Only 104 9 10 Louver Control for Preventing Ceiling Dirt 105 9 11 Heater Control Except FXTQ TA Models 106 9 12 Heater Control FXTQ TA Models 107 9 13 3 Step Thermo...

Page 71: ...rankcase heater control Startup control include pressure equalization before startup 1 Startup control in cooling 2 Startup control in heating Basic control 1 Normal Operation 2 Compressor PI control...

Page 72: ...Refer to Error code and Descriptions page 167 of the troubleshooting for the items to determine the error 2 2 When System is in Stop Mode The four way valves both for heat exchanger switch and piping...

Page 73: ...m In addition the outdoor fan carry out the residual operation for a while to suppress the acceleration of the pressure equalizing and melting of the refrigerant to the evaporator 3 2 Crankcase Heater...

Page 74: ...ur way valve 4 1 Startup Control in Cooling Pc High pressure sensor detection value Pe Low pressure sensor detection value Ta Outdoor air temperature Te Low pressure equivalent saturation temperature...

Page 75: ...Hz 5 sec 3 Hz 5 sec A B C D E A 0 pulse Step4 Step8 OR PI control A Inverter compressor 1 M1C Inverter compressor 2 M2C Electronic expansion valve main Y1E Inverter fan M1F REYQ72TA M1F M2F REYQ96 16...

Page 76: ...erheated degree control discharge pipe protection Superheated degree control discharge pipe protection Superheated degree control discharge pipe protection Electronic expansion valve Receiver gas purg...

Page 77: ...ter compressor 1 M2C Inverter compressor 2 Single Outdoor Unit Controls compressor capacity to adjust Te to achieve target value TeS Te Low pressure equivalent saturation temperature TeS Target temper...

Page 78: ...from left to right 2 Compressors may operate in any pattern other than those mentioned above according to the operating status No 1 No 2 No 4 No 2 No 1 No 3 No 3 No 4 M1C M2C M1C M2C M1C M1C M2C No 1...

Page 79: ...324 9 13 70 8 73 148 5 133 329 1 14 71 7 74 150 3 134 333 3 15 72 6 75 152 1 135 337 5 16 73 5 76 153 9 136 341 7 17 74 4 77 155 7 137 345 9 18 75 3 78 157 8 138 350 4 19 76 2 79 159 9 139 354 9 20 77...

Page 80: ...243 0 24 70 8 0 0 70 8 0 0 87 80 6 90 6 80 6 90 6 150 229 2 249 2 229 2 249 2 25 71 6 0 0 71 6 0 0 88 81 8 91 8 81 8 91 8 151 233 6 253 6 233 6 253 6 26 72 6 0 0 72 6 0 0 89 82 8 92 8 82 8 92 8 152 2...

Page 81: ...89 7 81 4 89 7 147 202 2 220 8 202 2 220 8 28 74 6 0 0 74 6 0 0 88 82 6 90 9 82 6 90 9 148 205 0 225 3 205 0 225 3 29 75 6 0 0 75 6 0 0 89 83 6 91 8 83 6 91 8 149 207 8 230 1 207 8 230 1 30 76 6 0 0 7...

Page 82: ...c expansion valve Y2E so that the evaporator side gas pipe superheated degree SH will become constant Refrigerant charge electronic expansion valve EVJ control While in automatic refrigerant charge mo...

Page 83: ...0 0 0 0 1 281 0 281 0 2 290 0 290 0 3 299 0 299 0 4 308 0 308 0 5 348 0 348 0 6 356 0 356 0 7 365 0 365 0 8 375 0 375 0 9 384 0 384 0 10 395 0 395 0 11 405 0 405 0 12 416 0 416 0 13 427 0 427 0 14 43...

Page 84: ...72 962 1072 48 1005 1115 1005 1115 49 1050 1160 1050 1160 50 1096 1206 1096 1206 51 1135 1265 1110 52 2 1340 1160 1335 1155 REYQ144 168TA Step No Standard default Cooling Heating Simultaneous M1F M2F...

Page 85: ...t Lower side Upper side Lower side Upper side Condenser Condenser Condenser Lower side Upper side Outdoor unit Lower side Upper side Lower side Upper side Condenser Condenser CL decrease HL increase C...

Page 86: ...p down 1 step up 2 step down After 10 seconds After 15 seconds After 15 seconds After 10 seconds Pc 3 57 MPa 518 psi Pc 3 70 MPa 537 psi Pc 3 14 MPa 455 psi Pc 3 45 MPa 500 psi Pc 3 67 MPa 532 psi Pc...

Page 87: ...3 72 MPa 540 psi Normal Operation 9 step down All units Compressor step 1 3 step up Current step maintained High pressure standby 2 times within 40 minutes Pc High pressure sensor detection value for...

Page 88: ...is displayed Low pressure standby 3 times within 60 minutes Low pressure standby 4 times within 60 minutes Normal Operation 9 step down 9 step up 3 step up 21 step down After 10 seconds After 15 secon...

Page 89: ...nds After 30 seconds HTdi 115 C 239 F HTdi 130 C 266 F HTdi 105 C 221 F HTdi 110 C 230 F HTdi 115 C 239 F HTdi 120 C 248 F HTdi 125 C 257 F Compressor step 1 After 20 seconds HTdi 135 C 275 F HTdi 120...

Page 90: ...ease of compressor body temperature Contents The following control is performed for each compressor of single unit as well as multi units Inverter compressor only for type JT15JBVDKYR Normal operation...

Page 91: ...n control Perform the following 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 time...

Page 92: ...Condition REYQ72TAYDU REYQ96 120TAYDU REYQ144 168TAYDU M1C M1C M2C M1C M2C A 96 C 204 8 F 98 C 208 4 F 98 C 208 4 F 98 C 208 4 F 82 C 179 6 F B 93 C 199 4 F 95 C 203 F 95 C 203 F 95 C 203 F 79 C 174 2...

Page 93: ...Inverter compressor 1 M1C M1C 124 Hz 120 Hz 124 Hz 120 Hz Inverter compressor 2 M2C 0 Hz 0 Hz Inverter fan M1F M1F M2F For heat exchanger mode For heat exchanger mode Electronic expansion valve Heat...

Page 94: ...Same as normal operation Electronic expansion valve Heat exchanger lower Y3E Y3E Electronic expansion valve Subcooling heat exchanger Y2E Y2E 0 pulse Electronic expansion valve Receiver gas purge Y4E...

Page 95: ...5S Hold Four way valve Heat exchanger upper Y6S Y6S Hold Ending condition A lapse of 8 minutes while the frequency is more than that of oil return operation Indoor unit actuator Cooling Heating Fan Th...

Page 96: ...exchanger lower Y5S Y5S Hold Four way valve Heat exchanger upper Y6S Y6S Hold Ending condition A lapse of 15 minutes Tb 11 C 51 8 F continues for 30 seconds or more OR Indoor unit actuator Defrost ope...

Page 97: ...nic expansion valve will fully open and the electronic expansion valve of the indoor unit will open to activate the heating circuit The required switching time is approximately 6 minutes Field setting...

Page 98: ...e will fully open and the electronic expansion valve of the indoor unit will open to activate the heating circuit The required switching time is approximately 6 minutes Field settings however can shor...

Page 99: ...time 30 seconds switching control time While switching The compressor stops operating 4 Startup control Switching the dual pressure gas pipe from low pressure to high pressure 5 Into heating operation...

Page 100: ...ansion valves of branch selector unit Required switching time 2 to 4 minutes switching control time While switching The compressor stops operating 4 Startup control Switching the dual pressure gas pip...

Page 101: ...mpressors On the system with 1 compressor REYQ72TA this emergency operation is not available 8 2 Demand Operation In order to save the power consumption the capacity of outdoor unit is saved with cont...

Page 102: ...c expansion valve Thermostat ON operation signal to outdoor unit Output Thermostat ON operation signal to outdoor unit Output 1 If any error occurs the relevant error code will be displayed according...

Page 103: ...n instruction from the remote controller the wind direction is set to 100 horizontal while in heating operation 11 Fan According to fan speed instruction from the remote controller the fan is put into...

Page 104: ...played temperature 2 C 3 6 F The temperature difference for cooling heating mode switching is 5 C 9 F The above also applies to automatic operation When setting the suction air thermistor Default sett...

Page 105: ...e controller set temperature Regarding control target temperature When using the infrared presence floor sensor the temperature around people will be treated as the control target temperature for oper...

Page 106: ...ote controller thermistor near the position of the user when the suction temperature is near the set temperature Assuming the set temperature in the figure above is 24 C 75 F and the suction temperatu...

Page 107: ...ction temperature has changed from 18 C 64 F to 28 C 82 F A D This example also assumes there are several other air conditioners and the suction temperature changes even when the thermostat sensor is...

Page 108: ...2 Tro will be the same as the cooling set temperature at the time of starting dry operation 1 The thermistor for room temperature detection depends on the field setting 10 20 2 2 Description of symbol...

Page 109: ...to operate outside of use range To avoid the above condition a limit based on the suction air temperature is set for the use range of the temperature around people Heating operation When the floor te...

Page 110: ...mode Cooling mode Control temp Differential value set to 1 C 1 8 F Set heating temp Set cooling temp Heating mode Control temp Differential value set to 2 C 3 6 F Heating mode Control temp Differenti...

Page 111: ...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 also tu...

Page 112: ...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 contr...

Page 113: ...s lower As T Remote controller set temp Suction air temp becomes smaller SHS becomes higher Subcooling degree control in heating operation This function is used to adjust the opening of the electronic...

Page 114: ...pipe temperature 1 C 30 2 F for total of 40 minutes or Liquid pipe temperature 5 C 23 F for total of 10 minutes Condition for cancelling Liquid pipe temperature 7 C 44 6 F for 10 minutes continuously...

Page 115: ...f 15 minutes or Liquid pipe temperature 0 C 32 F for 1 minute continuously During freeze up prevention operation the airflow rate is fixed to LL The cancelling conditions are same as the standard 0 C...

Page 116: ...mode for prevention of cold air Swing LL Horizontal Horizontal Horizontal Horizontal Airflow direction set LL Horizontal Horizontal Horizontal Horizontal Stop Swing OFF Horizontal Horizontal Horizonta...

Page 117: ...re initiating the hot start OFF Hot start control Hot start in progress Normal control Normal control H L remote controller setting LL OFF Remote controller setting P0 Horizontal Fan Louver Ending con...

Page 118: ...XFQ FXZQ and FXEQ models Factory setting FXFQ models draft prevention position FXZQ FXEQ models standard position P0 P1 P2 P4 P3 P0 P1 P2 P4 P3 P0 P0 P1 P2 P4 P4 P2 P1 P0 P4 P4 P3 P2 P1 P0 P3 Existing...

Page 119: ...ted by converting the heater temperature into the condensing pressure equivalent saturated temperature Tc according to the temperature detection through the high pressure sensor S1NPH of the outdoor u...

Page 120: ...ting Automatic heating Auxiliary heater enabled 1 Not in heating Automatic heating Auxiliary heater enabled 0 3 Heater not allowed Heater allowed Heater 1 OFF Heater 2 OFF OR OR OR Thermostat OFF Oper...

Page 121: ...mperature condition ON 2 Heater ON permission Defrost oil Return 0 4 Not during defrost oil return No fan motor system error During defrost oil return Heater ON permission Defrost oil return 1 4 OR No...

Page 122: ...al value Thermostat OFF Operation OFF ENTRY 5 minutes timer starts Condition A Time up 2 H P Heating Not in operation Heater 1 ON Heater 2 OFF Fan ON Entry 5 minutes timer starts OR Thermostat step 2...

Page 123: ...4 A and B values vary automatically based on the field setting 12 22 2 5 If directly after a change in conditions it is such that the thermostat could be either ON or OFF controlled temperature is wi...

Page 124: ...LEANER terminal on the PCB 2 Field setting 14 24 4 Refer to page 131 9 15 2 Humidifier When a humidifier is connected onsite the fan operates with the airflow rate set of the remote controller or with...

Page 125: ...t turns ON the relay on the X2M ECONOMIZER2 on the PCB 2 External input ON is an input signal to the X1M ECONOMIZER1 terminal on the PCB 3 Refer to Optional Kit Setting UV lamp Humidifier Economizer f...

Page 126: ...d Setting from Outdoor Unit 136 2 1 Accessing the BS Buttons on the Logic Board 136 2 2 Operating the BS Buttons and DIP Switches on the Logic Board 137 2 3 Connecting of the Optional PC Configurator...

Page 127: ...p total setting 1 Press and hold Cancel button for 4 seconds or more Service settings menu is displayed 2 Select Field Settings in the Service Settings menu and press Menu OK button Field settings scr...

Page 128: ...8 In the case of multiple setting changes repeat 3 to 7 9 After all setting changes are completed press Cancel button twice 10 Backlight goes out and Checking the connection Please standby is display...

Page 129: ...ng 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 button to select the second code...

Page 130: ...tting W 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 is unneces...

Page 131: ...ure Ton Refer to page 124 for detail 2 Auxiliary electric heater OFF temperature Toff 3 Setting the airflow rate when heating Standard Slightly increased Increased 3 6 Electric heater setting Refer to...

Page 132: ...dard High ceiling 1 High ceiling 2 1 Airflow direction setting Set when a blocking pad kit has been installed F 4 directions T 3 directions W 2 directions 2 Swing pattern settings All direction synchr...

Page 133: ...or standing type Concealed floor standing type Air handling unit Round flow 4 way flow FXFQ FXZQ FXUQ FXEQ FXDQ FXMQ FXHQ FXAQ FXLQ FXNQ FXTQ Filter sign z z z z z z z z z z z Ultra long life filter s...

Page 134: ...t to 03 room temperature is controlled by the remote controller thermistor FXTQ TA When the Second Code No is set to 02 room temperature is controlled by the remote sensor thermistor When the Second C...

Page 135: ...2 78 8 82 4 86 89 6 F F 14 16 18 20 22 24 26 28 30 32 34 66 2 62 6 69 8 73 4 77 80 6 84 2 87 8 91 4 95 98 6 F F 57 2 60 8 64 4 68 71 6 75 2 78 8 82 4 86 89 6 93 2 In cooling In heating Suction air te...

Page 136: ...nce continues for a certain period of time Absent time defined for detection can be selected as follows The set temperature displayed on the remote controller remains same even if the target temperatu...

Page 137: ...No First Code No Symbol Second Code No 01 02 03 04 05 06 11 21 1 Ton 4 C 7 2 F 3 5 C 6 3 F 3 C 5 4 F 2 5 C 4 5 F 2 C 3 6 F 1 5 C 2 7 F Toff 2 C 3 6 F 1 5 C 2 7 F 1 C 1 8 F 0 5 C 0 9 F 0 C 0 F 0 5 C 0...

Page 138: ...efrost oil return operation 11 21 3 01 Electric heater with heat pump not allowed Not allowed 02 Electric heater with heat pump allowed Not allowed 07 Electric heater with heat pump not allowed Allowe...

Page 139: ...presence floor sensor only Change the ratio between the suction air temperature and floor temperature used to calculate the temperature around human The temperature around human is calculated using th...

Page 140: ...nd Code No Contents 11 21 9 01 4 C 7 2 F 02 2 C 3 6 F 03 0 C 0 F 04 2 C 3 6 F Environment Operation Mode Problem Setting Value The unit is installed close to a wall or a window High thermal capacity o...

Page 141: ...ply turned ON again return to the same operation condition as that of before power failure For the above reasons when the unit is set enabling to utilize Auto restart function after power failure rese...

Page 142: ...Mode No First Code No Second Code No Contents 13 23 0 01 Standard 02 Slight increase 03 Normal increase Mode No First Code No Second Code No Contents Ceiling height 4 way Outlets 3 way Outlets 2 way O...

Page 143: ...be set to 110 200 Pa 0 44 0 80 inWG 3 FXMQ54PB cannot be set to 30 Pa 0 12 inWG or 150 200 Pa 0 60 0 80 inWG Model No First Code No Second Code No Contents 13 23 3 01 Equipped 02 Not equipped Mode No...

Page 144: ...e thermostat is stopped For the purpose of preventing dust on the air filter from falling off Mode No First Code No Second Code No Contents UV lamp humidifier fan speed Economizer setting for Mech sta...

Page 145: ...t display is not preferred Key lock Pattern Settings For BRC1E73 only Setting of key lock pattern for the remote controller When the Second code No is set to 04 no menu operation is allowed without ke...

Page 146: ...revent the airflow block is advertently set to ON Ensure that this setting is Disable airflow block when using together with options listed above Room Temperature Display For BRC1E73 only A Detailed d...

Page 147: ...ller OFF control only possible by remote controller Used when you want to turn ON by central remote controller only and OFF by remote controller only Centralized Used when you want to turn ON by centr...

Page 148: ...ation 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 OFF co...

Page 149: ...e system 2 1 Accessing the BS Buttons on the Logic Board It is not required to open the complete electronic component box to access the BS buttons on the logic board and read out the 7 segment display...

Page 150: ...hes which are located on the outdoor unit PCB A1P Turn ON the power supply of the outdoor unit and all indoor units When the communication between indoor units and outdoor unit s is established and no...

Page 151: ...ed to the system Result mode1 setting 10 is addressed and selected return value is monitored information To leave the monitoring function press BS1 once you will return to the default situation when s...

Page 152: ...ndication When achieved define the setting value by pressing BS3 once To start operation according to the chosen setting confirm again by pressing BS3 To leave the monitoring function press BS1 2 time...

Page 153: ...erating under low noise restrictions 0 unit is currently not operating under low noise restrictions Night time low noise operation reduces the sound generated by the unit compared to nominal operating...

Page 154: ...atest error code 1 18 shows the error code which occurred 1 time before current error code 1 19 shows the error code which occurred 2 time before current error code When the latest error codes were re...

Page 155: ...tatic pressure setting In order to increase the static pressure the outdoor fan is delivering this setting should be activated For details about this setting see technical specifications Default value...

Page 156: ...Level 1 The start and stop moments for this function are defined under setting 2 26 and 2 27 Default value 0 To activate this function 1 2 or 3 2 25 Night time low noise operation level via the exter...

Page 157: ...s sent to the unit this setting defines the level power consumption limitation that will be applied for step 2 The level is according to the table 2 32 Forced all time power consumption limitation ope...

Page 158: ...down to below 29 5 C 85 1 F and indoor condition A It returns to remote controller setting when outdoor air temperature goes up to over 32 5 C 90 5 F or indoor condition B 4 Fan speed is limited to L...

Page 159: ...e 1 2 Mode 2 3 Mode 3 4 Mode 4 5 Mode 5 6 Mode 6 Mode Description Actions Field setting Shorted between Heating Thermo on Heating Thermo off Heater Fan Heater Fan Mode 1 Lockout is controlled by an ex...

Page 160: ...ump lockout temperature This is only effective when the heat pump lockout 2 setting 2 37 is Mode 3 to 6 2 79 Heat pump lockout release differential Heat pump is resumed when the outdoor ambient temper...

Page 161: ...nergize when the outdoor ambient temperature is recovered by differential above the auxiliary heater maximum allowable temperature Value 2 81 Cooling comfort setting 0 Eco 1 default Mild 2 Quick 3 Pow...

Page 162: ...F2 B C A F2 F1 F1 F2 F1 Outdoor unit TOIN DUNIT TOOUT DUNIT F1 F2 F1 F2 F1 F2 F1 F2 IN D OUT D BS REMOTE CONTROLLER Branch Selector unit A F1 F2 F1 F2 IN D OUT D BS Branch Selector unit B COOL HEAT se...

Page 163: ...tion mode B When the night time low noise operation is carried out automatically at night The external control adaptor for outdoor unit is not required 1 While in setting mode 2 select the setting con...

Page 164: ...ith night time low noise 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 0 00 PM 7 00 AM 8 00 A...

Page 165: ...et item No 12 Setting of external low noise demand operation to YES 3 If necessary while in setting mode 2 select the set item No 30 Setting of Demand 1 level and then set the setting condition to tar...

Page 166: ...ptor for outdoor unit as shown below F1 F2 N X1M Host computer monitor panel or demand controller 1 2 3 C Demand Low noise Power consumption Rated power consumption 40 of rated power consumption Force...

Page 167: ...t 3 Press the BS3 RETURN button once and the present setting content is displayed Press the BS2 SET button several times and match the LED display with the setting content you want 4 Press the BS3 RET...

Page 168: ...nings Are all units securely installed z Dangerous for turning over during storm z Possible damage to pipe connections Is the earth wire installed according to the applicable local standard Dangerous...

Page 169: ...Abnormality 188 3 12 Blower Motor Stops for Over Under Voltage 189 3 13 Electronic Expansion Valve Coil Abnormality Dust Clogging 190 3 14 Drain Level above Limit 191 3 15 Capacity Determination Devic...

Page 170: ...normality 246 3 52 Refrigerant Shortage 247 3 53 Reverse Phase Open Phase 248 3 54 Power Supply Insufficient or Instantaneous Abnormality 249 3 55 Check Operation not Executed 251 3 56 Transmission Er...

Page 171: ...158 4 9 Pressure Sensor Check 285 4 10 Broken Wire Check of the Relay Wires 286 4 11 Fan Motor Connector Check Power Supply Cable 287 4 12 Fan Motor Connector Check Signal Cable 287 4 13 Electronic E...

Page 172: ...ng in a room The model must be selected to match the air conditioning load In cooling Too many heat sources e g OA equipment located in a room 4 The system does not operate The system stops and immedi...

Page 173: ...ed according to the setting Even pressing the airflow rate setting button makes no changes in the airflow rate In heating operation when the room temperature reaches the set degree the outdoor unit wi...

Page 174: ...operating sounds changes The reason is that the compressor changes the operating frequency Normal operation 12 Dust comes out from the system Dust comes out from the system when it restarts after the...

Page 175: ...routinely lifted become horizontal during heating operation No defect Set louver to horizontal P0 during thermostat OFF 9 Although people are not present the infrared presence sensor detects human pr...

Page 176: ...Basic Screen Operation mode changeover Fan speed control Menu display Confirmation of each setting On Off Cancel Operation lamp Press the Cancel button for 4 seconds or more Press the Cancel button on...

Page 177: ...Operation lamp Operation Status Display Abnormal shutdown The system stops operating The operation lamp green starts to blink The message Error Push Menu button will blink at the bottom of the screen...

Page 178: ...cation of the error code blinks 4 Press the UP or DOWN button to change the error code upper digit until the receiver of the remote controller starts to beep The upper digit of the code changes as sho...

Page 179: ...ION TEST button to enter the inspection mode 7 When MODE button is pressed or no button is pressed for 1 minute equipment returns to normal mode 6 Change the lower digit with UP or DOWN button If no b...

Page 180: ...bnormality 200 CA l Discharge air thermistor abnormality 196 CC k Humidity sensor system abnormality 201 CE 1 k Infrared presence floor sensor error 202 CJ 2 k Remote controller thermistor abnormality...

Page 181: ...PCB abnormality or combination of PCB abnormality 246 System U0 1 k Refrigerant shortage 247 U1 l Reverse phase open phase 248 U2 l Power supply insufficient or instantaneous abnormality 249 U3 l Che...

Page 182: ...for clogging with dust at the dust collection port as well as in the brush unit S shaped pipe and dust box Furthermore check for any stains of the light receiving and emitting parts of the infrared u...

Page 183: ...external ON OFF terminal Supposed Causes Actuation of external protection device Improper field setting Defective indoor unit PCB Troubleshooting ON OFF input from outside mode No 12 first code No 1 h...

Page 184: ...between external input terminals Supposed Causes Actuation of external protection device Defective indoor unit PCB Indoor unit fuse blown Troubleshooting Fuse F1U is blown External protection device...

Page 185: ...volatile memory Maintains memory contents even when the power supply is turned OFF Supposed Causes Defective indoor unit PCB External factor Noise etc Troubleshooting Turn the power supply OFF then th...

Page 186: ...or disconnecting connectors or parts may be damaged Replace the float switch S1L Modify the float switch s connection and turn ON again Connect the drain pump and turn ON again Connect either a short...

Page 187: ...ES NO NO The drain pump works when the power supply is reset for the indoor unit The voltage of drain pump terminals 2 is 208 230 V within 5 minutes of resetting the power supply A Model 1 Float switc...

Page 188: ...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 fan...

Page 189: ...ly rotated by hand NO NO YES Are there any foreign matter around the fan YES Is the resistance between the pins more than the judgement criteria Disconnect the connector from the fan motor and then ma...

Page 190: ...XFQ09 30P X20A Relay connector FXFQ36 48P X20A FXUQ A X20A Relay connector FXEQ P X20A FXMQ07 12PB X8A FXAQ P X20A Measuring point FG GND Vsp GND Vcc GND Vdc GND Criteria 1 M or more 100 k or more 100...

Page 191: ...voltage to the fan Supposed Causes Defective indoor fan motor Broken wires Defective contact Troubleshooting NO YES YES Is the X4A connector securely connected NO Is the power of 12 VDC supplied betw...

Page 192: ...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 level...

Page 193: ...PCB A2P NO Replace the indoor fan motor YES NO YES The fan can be moved lightly by hand after the fan motor connector of the fan PCB A2P is removed Replace the fan motor NO YES NO YES There is a fore...

Page 194: ...U terminals of the motor connector with five conductors Replace the indoor fan motor YES NO Between Vcc and GND terminals and between GND and Hw Hv or Hu terminals are short circuited Replace the indo...

Page 195: ...e in operation Supposed Causes Defective power supply for the indoor fan motor Clogged drain piping Actuation of the indoor unit safety device Defective contact in the fan wiring circuit Troubleshooti...

Page 196: ...alities Checks the rotation speed at 5 second intervals using the feedback of the fan motor Performs rotation sampling 720 times takes approx one hour and if the rotation speed falls below 50 rpm over...

Page 197: ...f the information shows Motor Lost Control or Current Trip status it will be deemed a MOTOR TRIP abnormal operation The system stops operating Error Reset Conditions If the indoor unit stops receiving...

Page 198: ...s If during this the rotation command is stopped the 5 second interval check is halted but the counted number will be kept When the rotation command is restarted the checks will resume Error Reset Con...

Page 199: ...unit is a model equipped with a swing flap function The swing motor works when the power supply is turned OFF and then restart The relay cable is short circuited or disconnected Caution Be sure to tu...

Page 200: ...M2S M3S M4S FXEQ P X36A M1S M2S M3S M4S FXHQ M X6A M1S FXAQ P X36A M1S Replace the power supply relay cable Replace the defective swing motor 2 Take the flap cam mechanism apart reassemble and turn O...

Page 201: ...wiring Instantaneous power failure others Troubleshooting Check the condition of the power supply 1 Check if power supply voltage is 208 230 V 10 2 Check if there is power open phase or defective wir...

Page 202: ...Decision Conditions If the information shows Over Under Voltage status it will be deemed a MOTOR VOLTS abnormal operation Error Reset Conditions If the information is normal the error will be cleared...

Page 203: ...of suction air R2T temperature of liquid pipe of heat exchanger Supposed Causes Defective electronic expansion valve coil Defective indoor unit main PCB Defective relay cables Troubleshooting Refer to...

Page 204: ...s not in operation Error code is displayed but the system operates continuously Supposed Causes Humidifier unit optional accessory leaking Defective drain pipe upward slope etc Defective indoor unit m...

Page 205: ...the capacity code is not saved to the PCB and the capacity setting adaptor is not connected When a capacity that does not exist for that unit is set Supposed Causes The capacity setting adaptor was no...

Page 206: ...1P Defective fan PCB A2P External factor such as instantaneous power failure Troubleshooting Under above field setting mode second code No is 01 NO NO YES Replace the fan PCB A2P YES YES Is the connec...

Page 207: ...remove the connector X70A of indoor unit PCB A1P 2 Short circuit X70A 3 After turning ON the power check below numbers under field setting from remote controller Confirmation Second code No at the co...

Page 208: ...message and determined as such by the indoor unit the indoor unit will execute a retry If everything fails for 5 seconds it is deemed to be a transmission abnormality Error Reset Conditions If the in...

Page 209: ...00 for C9 for FXTQ TA models Refer to page 282 Is the thermistor normal Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged 5 k to 90 k R...

Page 210: ...etting adaptor Field setting error Troubleshooting NO Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Was indoor unit main PCB A1P re...

Page 211: ...ion on the manufacturer ID and output of the fan motor when initializing the fan motor If those figures are not the values recognized by the indoor unit it will be deemed abnormal operation If deemed...

Page 212: ...cluded among the periodic control status information Error is issued when the information shows abnormality Error Decision Conditions If the parameter information shows abnormality it will be deemed a...

Page 213: ...Troubleshooting Note 1 Connector and indoor unit PCB Refer to page 282 Is the optional remote sensor is installed Field setting 10 20 2 is set to 03 Connector is connected to the indoor unit PCB 1 Res...

Page 214: ...the check mode 2 To display the code the INSPECTION TEST button of the remote controller must be pressed and held in the normal mode 3 If CC is displayed even after replacing the humidity sensor PCB...

Page 215: ...sor 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 216: ...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 adaptor PCB connector X9A normal NO YES YES Is the connect...

Page 217: ...refer to sensor and address data No 26 Connect the connector correctly Connect the connector correctly NO YES YES Is the connection of the adaptor PCB connector X9A normal NO YES YES Is the connectio...

Page 218: ...infrared floor sensor output refer to sensor and address data No 26 Is the connection of the adaptor PCB connector X9A normal Is the connection of the sensor connector normal Displays by the above ver...

Page 219: ...infrared floor sensor output refer to sensor and address data No 26 Is the connection of the adaptor PCB connector X9A normal Is the connection of the sensor connector normal Displays by the above ver...

Page 220: ...r Defective remote controller PCB Troubleshooting Note 1 How to delete the history of error codes Press the ON OFF button for 4 seconds and more while the error code is displayed in the inspection mod...

Page 221: ...ween the indoor unit and the outdoor unit are not normal Supposed Causes Defective outdoor unit main PCB A1P Defective connection communication line between indoor and outdoor units Troubleshooting Re...

Page 222: ...essure sensor Troubleshooting NO YES YES Replace the high pressure switch REYQ72TA S1PH REYQ96 168TA S1PH S2PH Remedy defective points Replace the high pressure sensor YES Are the above 3 points OK Do...

Page 223: ...ce the outdoor unit main PCB A1P NO YES Check if the high pressure value and the actual value measured by pressure sensor are the same The high pressure sensor is normal and pressure detection with th...

Page 224: ...sure Refer to page 276 Refer to page 285 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 operatio...

Page 225: ...leshooting 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 connections made to phases...

Page 226: ...equalization failure may have occurred Check for the refrigerant system YES YES NO Replace the inverter PCB 2 2 REYQ72TA A3P REYQ96 168TA A3P A6P NO The error recurs at startup Continue operation The...

Page 227: ...the system will return an alarm if there is any operational unit other than that applicable to E6 or determine to be error if not Supposed Causes Defective compressor Defective high pressure sensor D...

Page 228: ...to convert it to pressure Refer to page 278 Refer to page 285 NO YES Are the high pressure and low pressure checked by the service checker the same as the actual measured values of the high and low p...

Page 229: ...matter caught in it Clearing condition fan motor performs normal operation for a period of 5 minutes Troubleshooting 8 14 ton classes are equipped with 2 compressors Check for the compressor 1 or 2 a...

Page 230: ...etween U V W phases of the fan motor power supply cable has lost balance or short circuit is caused between U V W phases Check for the connector power supply cable of the fan motor NO CHECK 16 Replace...

Page 231: ...lls within the range of 40 to 50 Turn OFF the power supply once and then turn it ON again Return to normal Investigate external causes other than failures e g noise YES NO Connector for the electronic...

Page 232: ...ormally high i e 135 C 275 F or more When discharge pipe temperature sharply rises remains at 120 C 248 F or more for a period of consecutive 10 minutes When compressor surface temperature becomes abn...

Page 233: ...ation and then restart it Are the characteristics of the discharge pipe and compressor body thermistors normal 1 All thermistors are normal and temperature detection with the outdoor unit main PCB is...

Page 234: ...essure service port Reset the operation and then restart the operation Stop the relevant indoor units while the system is in cooling operation and then check for the liquid pipe temperature of these i...

Page 235: ...Disconnection of outdoor air thermistor Disconnection of heat exchanger deicer thermistor Disconnection of liquid pipe temperature thermistor Troubleshooting Refer to page 282 Check for the conditions...

Page 236: ...Supposed Causes Defective connection of jumpers between PCB Defective outdoor unit main PCB A1P Defective inverter PCB Troubleshooting Note 1 Outdoor unit main PCB and Inverter PCB Check for the tran...

Page 237: ...hooting Refer to page 287 Properly connect the connector NO YES Replace the fan motor NO YES Turn OFF the power supply Check for fan motor applicable to the error code H7 while in monitor mode Sub cod...

Page 238: ...iring disconnection or short circuit in it Supposed Causes Defective connection of thermistor Defective thermistor Defective outdoor unit PCB Troubleshooting Thermistor is connected to the connector R...

Page 239: ...nector R12T X15A Group connector Suction air R10T X29A Group connector R10T X29A Group connector R10T X29A Group connector J6 Heat exchanger deicer R11T X15A Group connector R11T X15A Group connector...

Page 240: ...285 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 main...

Page 241: ...re 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 main PCB A1...

Page 242: ...ed 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 When ov...

Page 243: ...nd the fan PCB 2 Replace the inverter PCB 1 1 REYQ72TA A3P REYQ96 168TA A3P A6P 2 REYQ72TA A4P REYQ96 168TA A4P A7P NO YES Turn OFF the power supply once and then turn it ON again 8 14 ton classes are...

Page 244: ...urface thermistor is more than the specified temperature Supposed Causes Defective connection of harness Defective reactor surface thermistor Defective inverter PCB Troubleshooting Is reactor harness...

Page 245: ...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 button continuously Does the error recur Replace the i...

Page 246: ...ting Compressor inspection Power OFF Open the stop valve YES NO Is the stop valve open YES YES Are wiring and wire connections to the relevant compressor normal Rectify the wiring and wire connections...

Page 247: ...rence 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 or less Replace the...

Page 248: ...en the stop valve YES NO Is the stop valve open YES YES Are wiring and wire connections to the relevant compressor normal Rectify the wiring and wire connections NO Caution Be sure to turn off the pow...

Page 249: ...e 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 less to ground Repla...

Page 250: ...models 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 251: ...No power applied for a period of 6 hours or more Eliminate the melting state of refrigerant YES Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may...

Page 252: ...3P A6P NO YES NO There is wiring disconnection in the compressor Replace the compressor 1 YES Is the insulation resistance of the relevant compressor 100 k or more Refrigerant is melting No power appl...

Page 253: ...nverter compressor Defective fan motor Troubleshooting Does the inverter PCB part No match that of the spare parts list Replace with a proper PCB NO Properly connect the connector NO YES Replace the f...

Page 254: ...3P REYQ96 168TA A3P A6P NO NO YES The microcomputer normal monitor indication lamp green on the outdoor unit main PCB A1P is blinking Properly connect the connector NO YES Is the connector between the...

Page 255: ...lance through PCB Error Decision Conditions When power supply voltage imbalance exceeds approximately 12 V Error is not decided while the unit operation is continued P1 will be displayed by pressing t...

Page 256: ...of noise filter Replace the inverter PCB REYQ72TA M1C REYQ96 168TA M1C M2C YES Explanation to users Use the document Notice of Inspection Results attached to spare part Hand the Notice of Inspection...

Page 257: ...ective reactor thermistor Defective inverter PCB Troubleshooting Check in Monitor Mode 8 14 ton classes are equipped with 2 compressors Check for the compressor 1 or 2 applicable to the error code P3...

Page 258: ...compressor Defective fan motor Troubleshooting Check in Monitor Mode 8 14 ton classes are equipped with 2 compressors Check for the compressor 1 or 2 applicable to the error code P4 while in monitor...

Page 259: ...ompressors Check for the compressor 1 or 2 applicable to the error code PJ while in monitor mode of the outdoor unit PCB Does the inverter PCB part No match that of the spare parts list Does the fan P...

Page 260: ...sure value by using pressure gauge in operation 2 Compare the actual measurement value by pressure sensor with the value by the pressure gauge To gain actual measurement value by pressure sensor measu...

Page 261: ...upposed Causes Power supply reverse phase T phase open phase Defective outdoor unit PCB A1P Troubleshooting There is an open phase at the power supply T phase terminal section X1M of the outdoor unit...

Page 262: ...r Defective connection of signal cable Troubleshooting Check in Monitor Mode 8 14 ton classes are equipped with 2 compressors Check for the compressor 1 or 2 applicable to the error code U2 while in m...

Page 263: ...ged 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 resulte...

Page 264: ...code and then go to the following Conduct the test operation The test operation has not been conducted U3 03 Check for the refrigerant piping and then conduct the test operation U3 04 Conduct the tes...

Page 265: ...or Detection Microcomputer checks if transmission between indoor and outdoor units is normal Error Decision Conditions When transmission is not carried out normally for a certain amount of time Suppos...

Page 266: ...e 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 230 V Replace the fuse Modify the tra...

Page 267: ...cording 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 button B...

Page 268: ...roller PCB Transmission error caused by noise Troubleshooting Using 2 remote controllers control SS1 of both remote controllers is set to MAIN All indoor unit PCB microcomputer monitors blink Operatio...

Page 269: ...itions When transmission is not carried out normally for a certain amount of time Supposed Causes Connection error of transmission wirings between outdoor unit and external control adaptor for outdoor...

Page 270: ...or is mounted Error code Sub code Error code Sub code Error code Sub code Error code Sub code Error code Sub code Error code Sub code Error code Sub code Error code Sub code Go to Diagnosis Flowchart...

Page 271: ...r 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 operation mo...

Page 272: ...e 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 Re...

Page 273: ...irings 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 outdoor unit m...

Page 274: ...eplace 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 transmi...

Page 275: ...r a certain amount of time Supposed Causes Transmission error between main and sub remote controller Connection between sub remote controllers Defective remote controller PCB Troubleshooting SS1 of bo...

Page 276: ...utdoor 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 Trouble...

Page 277: ...r unit PCB Mismatch of the refrigerant type of indoor and outdoor unit Setting of outdoor unit PCB was not carried out after replacing to spare PCB Troubleshooting Ensure the sub code or the lamp disp...

Page 278: ...1P Refer to Incorrect electric heater capacity setting troubleshooting 1 Excess indoor units are connected Check for the connection to connect the proper number of indoor units NO Diagnosis Flowchart...

Page 279: ...e outdoor unit main PCB A1P Check for the model of outdoor unit Make setting again and then reset the power supply Replace the spare PCB NO YES Replace the outdoor unit main PCB A1P Was the outdoor un...

Page 280: ...O Correct the multi combination of outdoor units Diagnosis Flowchart 5 Is the multi combination of outdoor units proper NO Was the outdoor unit PCB replaced with a spare PCB Replace the outdoor unit m...

Page 281: ...pplicable value Operation After Error Codes Decided The error code UA 17 is displayed on the remote controller Indoor units can operate continuously Incorrect setting is kept Even if the ON condition...

Page 282: ...t 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 cont...

Page 283: ...ntral control group No be made in one and the same refrigerant system Has the setting of central control group No been made with the indoor unit on which the UE occurred Can the setting of central con...

Page 284: ...ralized 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 then check the vo...

Page 285: ...ansmission 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 out...

Page 286: ...All outdoor unit models 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 is...

Page 287: ...m Disconnect 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...

Page 288: ...service monitor PCB Including capacity setting High airflow passage resistance Dirty filter Obstacle Excessiverefrigerantcharging Improper model selection In heating Check to be sure the stop valve is...

Page 289: ...ing length Bent or crashed pipe Cloggingofforeignmaterials Stop valve closed Less circulation quantity of refrigerant Degradation in evaporating capacity Inadequate refrigerant quantity Moisture choke...

Page 290: ...e pipe temperature control Defective hot gas bypass control Hot gas circuit clogging Defective solenoid valve coil Defective solenoid valve body Defective service monitor PCB Defective service monitor...

Page 291: ...g the digital type of multimeter make measurement in diode check mode No Measuring point Judgement Criteria Remarks No Measuring point Judgement Criteria Remarks 1 P2 U 2 15 k 1 P2 U 1 2 V and more Du...

Page 292: ...Low pressure Frequency High pressure gradually rises with increase in frequency Subcooling degree becomes higher Liquid connection pipe temperature lowers Low pressure rises due to decreased compress...

Page 293: ...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 294: ...1 hour or more and then check to be sure that the vacuum gauge reading does not rise If the reading rises moisture may have remained in the system or refrigerant leakage may have been caused 3 Additio...

Page 295: ...XAQ P FXLQ M FXNQ M FXTQ TA Type A Thermistor REYQ72TA REYQ96 120TA REYQ144 168TA R1T Outdoor air Type E Type E Type E R2T Discharge pipe Type H R21T Type H Type H R22T R3T Receiver inlet Type A Type...

Page 296: ...31 44 31 4796 31 51 31 41 20 68 24 95 25 0060 25 02 24 98 25 77 19 94 20 0000 20 00 20 00 30 86 16 04 16 1008 16 10 16 12 35 95 12 99 13 0426 13 04 13 07 40 104 10 58 10 6281 10 63 10 67 45 113 8 669...

Page 297: ...326 160 2244 16 1860 35 95 13 0683 130 0697 13 1222 40 104 10 6490 106 1517 10 7042 45 113 8 7269 87 0725 8 7834 50 122 7 1905 71 7703 7 2479 55 131 5 9524 59 4735 6 0131 60 140 4 9536 49 5180 5 0144...

Page 298: ...3 3 5 4 VDC kg cm2 psi MPa PH PL PH MPa VH 0 5 PL MPa VL 0 5 PH High pressure MPa PL Low pressure MPa VH Output Voltage High Side VDC VL Output Voltage Low Side VDC 4 15 3 0 4 15 3 0 1 7 3 0 1 7 3 0...

Page 299: ...ecking indoor outdoor unit transmission wiring for broken wires for checking the indoor outdoor unit transmission wiring of the Outdoor Unit C for broken wires Turn OFF the power supply to all equipme...

Page 300: ...power supply 2 Measure the resistance between Vcc and each phase of U V W and GND and each phase at the motor side connectors 5 core wire to check that the values are balanced within the range of 20 w...

Page 301: ...judge the condition The normal products will show the following conditions 1 No continuity between 1 and 2 2 Resistance value between 1 and 3 is approx 300 3 Resistance value between 1 and 5 is appro...

Page 302: ...SiUS371614E 289 Appendix Part 7 Appendix 1 Wiring Diagrams 290 1 1 Outdoor Unit 290 1 2 Indoor Unit 296 1 3 Air Treatment Equipment 303 1 4 Branch Selector Unit 306...

Page 303: ...SiUS371614E Wiring Diagrams Appendix 290 1 Wiring Diagrams 1 1 Outdoor Unit REYQ72TAYDU 3D106424A...

Page 304: ...Wiring Diagrams SiUS371614E 291 Appendix REYQ96 120TAYDU 2D106425A...

Page 305: ...SiUS371614E Wiring Diagrams Appendix 292 REYQ144 168TAYDU 2D106426A...

Page 306: ...Wiring Diagrams SiUS371614E 293 Appendix REYQ72TATJU 3D106421A...

Page 307: ...SiUS371614E Wiring Diagrams Appendix 294 REYQ96 120TATJU 2D106422A...

Page 308: ...Wiring Diagrams SiUS371614E 295 Appendix REYQ144 168TATJU 2D106423A...

Page 309: ...OR FOR WIRING TO TERMINAL BLOCK X2M OF INDOOR UNIT DIRECTORY 6 X8A X33A X35A X36A ARE CONNECTED WHEN THE OPTIONAL ACCESSORIES ARE BEING USED IN CASE OF USING A SELF CLEAN PANEL SEE THE WIRING DIAGRAM...

Page 310: ...OFF CONTROL OPERATION CAN BE SELECTED BY REMOTE CONTROLLER IN DETAILS REFER TO THE INSTALLATION MANUAL ATTACHED TO THE UNIT 5 SYMBOLS SHOW AS FOLLOWS RED RED BLK BLACK WHT WHITE YLW YELLOW PNK PINK OR...

Page 311: ...R DRAIN PUMP THERMAL PROTECTOR M1F EMBEDDED THERMISTOR AIR THERMISTOR COIL 1 THERMISTOR COIL 2 FLOAT SWITCH TRANSFORMER 208 230V 25V PHASE CONTROL CIRCUIT TERMINAL BLOCK TERMINAL BLOCK ELECTRONIC EXPA...

Page 312: ...54PBVJU INPUT FROM OUTSIDE NOTE 3 A 1 P A 3 P Z 1 C t t t t GRN YLW POWER SUPPLY 1 208 230V 60Hz FOR FXMQ15 18 24 30 36 48 54PBVJU TO X70A A1P TO X1M NOTE 6 FOR FXMQ07 09 12PBVJU TO X1M MS 3 M 1 TRANS...

Page 313: ...OR WIRELESS REMOTE CONTROLLER 3D048116B R1T R2T R3T GRN YLW GRN A2P A3P SS1 H1P t t t A1P X2A BS1 H2P H3P SS2 X14A X18A X19A H4P X27A NE V1R RED C5 L1 X1A X1A Z1F PS F1U WHT PNK L2 T2 INPUT FROM OUTSI...

Page 314: ...EMOTE CONTROLLER CONNECT IT TO THE UNIT IN ACCORDANCE WITH THE ATTACHED INSTALLATION MANUAL 4 WHEN CONNECTING THE INPUT WIRES FROM OUTSIDE FORCED OFF OR ON OFF CONTROL OPERATION CAN BE SELECTED BY REM...

Page 315: ...VOLTAGE FIELD JUNCTION TERMINAL PLUG CONNECTION EQUIPMENT GND FIELD GROUND X1A X3A X38A BS1 X12A X13A HAP X8A INDOOR UNIT PCB THERMISTOR HEAT EXCHANGER 1 2 MPU MULTI TENANT OPTION EEV COIL M K1R K3R...

Page 316: ...Wiring Diagrams SiUS371614E 303 Appendix 1 3 Air Treatment Equipment 1 3 1 Outdoor air Processing Unit FXMQ48 72 96MFVJU 3D065426D...

Page 317: ...SiUS371614E Wiring Diagrams Appendix 304 1 3 2 Energy Recovery Ventilator VAM Series VAM300 470 600GVJU 3D073269C...

Page 318: ...Wiring Diagrams SiUS371614E 305 Appendix VAM1200GVJU 3D073270C...

Page 319: ...SiUS371614E Wiring Diagrams Appendix 306 1 4 Branch Selector Unit 1 4 1 Single Branch Selector Unit BSQ36 60 96TVJ 3D089521B...

Page 320: ...Wiring Diagrams SiUS371614E 307 Appendix 1 4 2 Multi Branch Selector Unit BS4Q54TVJ 3D089123B...

Page 321: ...SiUS371614E Wiring Diagrams Appendix 308 BS6 8Q54TVJ 2D089122B...

Page 322: ...Wiring Diagrams SiUS371614E 309 Appendix BS10 12Q54TVJ 2D089121B...

Page 323: ...Revision History Month Year Version Revised contents 02 2017 SiUS371614E First edition...

Page 324: ...nauthorized parts and accessories or improper installation of parts and accessories can result in water or refrigerant leakage electrical shock fire or explosion z Read the user s manual carefully bef...

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