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Daikin RXSQ24TAVJU Service Manual Download Page 68

Protection Control

SiUS331708EA

55

Functions and Control

4.3

Discharge Pipe Protection Control

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

Tp:    Value of compressor port temperature 

calculated by Tc, Te, and suction 
superheated degree.

HTdi: Value of compressor discharge pipe 

 temperature (Tdi) compensated with 
 outdoor air temperature

 HTdi > 130˚C (266˚F)

30 seconds

Lower STEP

  • HTdi > 115˚C (239˚F)
  • Tp > 150˚C (302˚F)

OR

  • HTdi < 105˚C (221˚F)
  • Tp < 135˚C (275˚F)

&

Current step maintained

Cooling: 20 seconds
Heating: 60 seconds

&

• HTdi < 95˚C (203˚F)

• Tp < 120˚C (248˚F)

 • HTdi > 110˚C (230˚F) 

OR

 • Tp > 150˚C (302˚F)

In discharge pipe temperature protection control

 HTdi > 135˚C (275˚F)

 HTdi < 115˚C (239˚F)

Discharge pipe 
protectioncontrol not limited

Discharge pipe 
temperature standby

When occurring 3 times within 100 minutes, the 
error code 

F3

 is output.

1-step down from 
current compressor 
frequency

Compressor upper limit frequency: 1-step up 
from current compressor frequency

Summary of Contents for RXSQ24TAVJU

Page 1: ...Service Manual SiUS331708EA RXSQ24 36 48 60TAVJU Heat Pump 60 Hz...

Page 2: ...Treatment Equipment 3 1 3 Outdoor Unit 3 2 External Appearance 4 2 1 Indoor Unit 4 2 2 Air Treatment Equipment 5 2 3 Outdoor Unit 5 3 Connection Ratio 6 Item Model ED No VRV indoor unit FXFQ T FXFQ P...

Page 3: ...te Controller 31 5 Centralized Control Group No Setting 33 5 1 BRC1E73 33 5 2 Wireless Remote Controller 35 6 Service Mode 36 6 1 BRC1E73 36 Part 4 Functions and Control 39 1 Operation Mode 40 2 Basic...

Page 4: ...83 6 15 2 Step Thermostat Processing CXTQ TA Models 84 6 16 Fan Control Heater Residual FXTQ TA Models 85 6 17 Interlocked with External Equipment FXTQ TA and CXTQ TA Models 85 Part 5 Field Settings a...

Page 5: ...te Controller 149 3 2 Wireless Remote Controller 150 4 Troubleshooting by Error Code 152 4 1 Error Codes and Descriptions 152 4 2 Error Codes Sub Codes 154 4 3 Error Code Indication by Outdoor Unit PC...

Page 6: ...en Microcomputers on the Outdoor Main PCB 218 4 46 Inverter Circuit Capacitor High Voltage 219 4 47 Radiation Fin Thermistor Abnormality 220 4 48 Refrigerant Shortage 221 4 49 Power Supply Insufficien...

Page 7: ...5 5 Refrigerant Overcharge Check 261 5 6 Refrigerant Shortage Check 262 5 7 Vacuuming and Dehydration Procedure 263 5 8 List of Inverter Related Error Codes 264 5 9 Concept of Inverter Related Error...

Page 8: ...n is shown in the illustration or near the symbol 1 1 Warnings and Cautions Regarding Safety of Workers This manual is for the person in charge of maintenance and inspection Warning Do not store the e...

Page 9: ...exclusive use with R 32 and R 410A refrigerant The use of materials for R 22 refrigerant models may cause a serious accident such as damage to the refrigerant cycle or equipment failure Do not mix air...

Page 10: ...iate tools to conduct repair work Never attempt to modify the equipment The use of inappropriate parts or tools may cause an electrical shock excessive heat generation or fire If the power cable and l...

Page 11: ...the refrigerant gas leaks be sure to locate the leakage and repair it before charging the refrigerant After charging the refrigerant make sure that there is no leakage If the leakage cannot be located...

Page 12: ...at generation fire or an electrical shock If the installation platform or frame has corroded replace it A corroded installation platform or frame may cause the unit to fall resulting in injury Check t...

Page 13: ...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 A note provide...

Page 14: ...1 General Information 1 Model Names of Indoor Outdoor Units 2 1 1 Indoor Unit 2 1 2 Air Treatment Equipment 3 1 3 Outdoor Unit 3 2 External Appearance 4 2 1 Indoor Unit 4 2 2 Air Treatment Equipment 5...

Page 15: ...pended Type FXUQ 18P 24P 30P 36P VJU One Way Blow Cassette Type FXEQ 07P 09P 12P 15P 18P 24P Slim Ceiling Mounted Duct Type FXDQ 07M 09M 12M 18M 24M MSP Concealed Ducted Type FXSQ 05TA 07TA 09TA 12TA...

Page 16: ...3 Outdoor Unit Series Model Name Power Supply Standard FXMQ 48MF 72MF VJU Series Model Name Power Supply Standard VAM 300G 470G 600G 1200G VJU VJ 1 phase 208 230 V 60 Hz U VJU Standard symbol Capacity...

Page 17: ...w type FXFQ P Shown with BYCP125K W1 Ceiling suspended type FXHQ M VISTA 2 2 cassette type FXZQ TA Shown with BYFQ60C3W1W Wall mounted type FXAQ P 4 way ceiling mounted cassette 2 2 type FXZQ M Shown...

Page 18: ...arance SiUS331708EA 5 General Information 2 2 Air Treatment Equipment 2 3 Outdoor Unit Outdoor air processing unit FXMQ MF Energy recovery ventilator VAM series VAM G RXSQ60TAVJU RXSQ24 36 48TAVJU 2 3...

Page 19: ...Min connection ratio Max connection ratio Types of connected indoor units VRV indoor units Single outdoor units 50 130 Model Name RXSQ24TAVJU RXSQ36TAVJU RXSQ48TAVJU RXSQ60TAVJU Capacity Range 2 ton 3...

Page 20: ...nt Circuit Part 2 Refrigerant Circuit 1 Refrigerant Circuit 8 1 1 Outdoor Unit 8 1 2 Indoor Unit 14 1 3 Outdoor Air Processing Unit 16 2 Functional Parts Layout 17 2 1 RXSQ24 36TAVJU 17 2 2 RXSQ48TAVJ...

Page 21: ...the increase of pressure when abnormal heating is caused by fire or others the fusible part of the plug is molten at a temperature of 70 75 C 158 167 F to release the pressure into the atmosphere 11...

Page 22: ...8EA 9 Refrigerant Circuit 2 M1F 16 R5T 1 15 R4T S1NPH S1NPL S1PH 12 R1T 18 R10T 17 13 R2T 14 R3T 5 Y2S Y1E M1C Y1S Y3S R7T 8 7 9 4 6 10 11 3 C 3D082498F The radiation fin thermistor 18 is located near...

Page 23: ...others the fusible part of the plug is molten at a temperature of 70 75 C 158 167 F to release the pressure into the atmosphere 10 Pressure regulating valve 1 Receiver to discharge pipe This valve ope...

Page 24: ...708EA 11 Refrigerant Circuit C 3D088594A The radiation fin thermistor 17 is located near the electrical component box 2 M1F 11 R1T 17 FINTH 16 R7T 12 14 R4T 13 R3T 4 3 Y1E Y1S R2T 9 10 5 Y3S 15 R5T 7...

Page 25: ...release the pressure into the atmosphere 10 Pressure regulating valve 1 Receiver to discharge pipe This valve opens at a pressure of 4 0 MPa 580 psi or more for prevention of pressure increase thus r...

Page 26: ...erant Circuit 2 11 R1T 17 R7T R2T 12 14 R4T S1NPH S1NPL S1PH 3 Y1E M1F M2F 9 10 4 Y3E 16 R6T 15 R5T 7 Low pressure sensor 8 6 1 M1C 13 R3T C 3D088595A The radiation fin thermistor 18 is located near t...

Page 27: ...erheated degree control while in cooling or subcooled degree control while in heating 4 Gas pipe thermistor R3T R3T R3T Used for gas superheated degree control while in cooling 5 Discharge air thermis...

Page 28: ...Filter Liquid piping connection port Gas piping connection port 3 4 2 1 C 4D043864N Indoor heat exchanger Fan Filter Filter 4 2 1 3 Gas piping connection port Liquid piping connection port C 4D034245...

Page 29: ...reduce pressure from high to low in bypassing hot gas 4 R1T Suction air thermistor Used to turn ON or OFF the thermostat 5 R2T Liquid pipe thermistor Used to control the opening degree of electronic...

Page 30: ...PL High pressure sensor S1NPH Thermistor Suction pipe 2 R5T R2T Four way valve coil Y1S Y2S R7T Y3S S1PH High pressure switch Y1E E1HC Crankcase heater Electronic expansion valve Main Thermistor Liqui...

Page 31: ...SiUS331708EA Functional Parts Layout Refrigerant Circuit 18 Side view Thermistor Suction pipe 1 R3T Thermistor Outdoor air R1T Four way valve Y1S Thermistor Heat exchanger deicer R4T C 1P342997M...

Page 32: ...Four way valve Y1S Thermistor Discharge pipe R2T High pressure switch S1PH Crankcase heater E1HC Compressor M1C Four way valve coil Y1S Thermistor Suction pipe 2 R5T Solenoid valve Unload circuit coi...

Page 33: ...SiUS331708EA Functional Parts Layout Refrigerant Circuit 20 Side view Thermistor Heat exchanger deicer R4T Thermistor Outdoor air R1T Thermistor Suction pipe 1 R3T C 1P374828Q...

Page 34: ...Front view Four way valve coil Low pressure sensor S1NPL High pressure switch S1PH Crankcase heater E1HC Four way valve coil Y1S Thermistor Suction pipe 2 R5T Thermistor Discharge pipe R2T Inverter fa...

Page 35: ...Electronic expansion valve coil Main Y1E Electronic expansion valve coil Subcooling Y3E Thermistor Heat exchanger deicer R4T Thermistor Liquid pipe R7T Thermistor Outdoor air R1T Thermistor Suction pi...

Page 36: ...RC1E73 25 2 2 Wireless Remote Controller 28 3 Main Sub Setting 29 3 1 BRC1E73 29 3 2 When Wireless Remote Controller is Used Together 30 4 Address Setting for Wireless Remote Controller 31 5 Centraliz...

Page 37: ...ler Wireless remote controller Navigation FXFQ T BRC1E73 FXFQ P FXZQ TA BRC082A42W for BYFQ60C3W1W BRC082A42S for BYFQ60C3W1S BRC082A41W for BYFQ60B3W1 FXZQ M BRC7E830 FXUQ P FXEQ P FXDQ M BRC4C82 FXS...

Page 38: ...to press the buttons on the remote controller damage may result 1 Operation mode selector button Press this button to select the operation mode of your preference Available modes vary with the indoor...

Page 39: ...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 40: ...ode changeover Fan speed control Menu display Confirmation of each setting On Off Cancel Operation lamp Press the Cancel button for 4 seconds or more Press the Cancel button once Press the Cancel butt...

Page 41: ...e display shows the set fan speed When the INSPECTION TEST button is pressed the display shows the system mode is in 13 14 15 16 17 TIMER RESERVE CANCEL BUTTON AIRFLOW DIRECTION ADJUST BUTTON OPERATIO...

Page 42: ...to Sub To change a remote controller from Main to Sub proceed as follows 3 1 1 Field Settings The designation of the main and sub remote controllers can be swapped Note that this change requires turni...

Page 43: ...sible to change the Main Sub setting from Main to Sub when only one remote controller is connected 2 When 2 remote controllers are being used it is not possible to change the setting from Main to Sub...

Page 44: ...trol 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 addres...

Page 45: ...etting options provided to enable discriminating by a beeping sound according to the operation A Standard or b Multi System Set the setting according to the customer s intention Field setting mode Add...

Page 46: ...once Service settings menu is displayed Item 2 is displayed Item 2 is displayed Item 2 is displayed Basic screen is displayed Press the Cancel button once Select the desired Group Address using the S...

Page 47: ...operation manual for maintenance Group Address Group Select Group Address and then press the Menu OK button Select Group Address Group and then press the Menu OK button Select the desired Group Addres...

Page 48: ...s 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...

Page 49: ...ation hours Outdoor compressor 1 operation hours Outdoor compressor 2 operation hours Indoor Unit Status Unit No Select the unit number you want to check FAN Fan tap 1 Speed Fan speed rpm 2 FLAP Airfl...

Page 50: ...No Current Unit No A unit number can be transferred to another Transfer Unit No Addressed Sensor Value Unit No 0 15 Select the unit number you want to check Code 00 01 02 03 04 05 06 07 08 09 30 4 7...

Page 51: ...ven if the fan is rotating For CXTQ TA models rpm is displayed even if the fan is rotating 3 For FXTQ TA CXTQ TA models The ON OFF status of the humidifier connected to HUMIDIFIER on the X1M terminal...

Page 52: ...rohibition 58 5 3 Gas Furnace Operation Prohibition 58 5 4 Gas Furnace Operation Startup Prohibition 58 6 Outline of Control Indoor Unit 59 6 1 Operation Flowchart 59 6 2 Set Temperature and Control T...

Page 53: ...ressor PI control Protection control Indoor unit thermostat ON Cooling or heating operation Indoor unit thermostat ON Error Standby Defrost operation Defrost starting conditions are met Indoor unit st...

Page 54: ...c expansion valve Y3E PI control Hot gas bypass valve Y2S OFF This valve turns on with low pressure protection control Injection valve Y3S Y3S OFF This valve turns on with high discharge temperature p...

Page 55: ...s changed 2 Constant pressure control The target evaporation temperature is not changed Heating operation Controls compressor capacity to achieve target Tc value TcS Tc High pressure equivalent satura...

Page 56: ...22 6 24 5 24 6 24 24 6 24 24 6 24 24 7 27 26 7 26 26 7 26 26 7 26 26 8 28 28 5 8 28 5 28 5 8 28 5 28 5 8 28 5 28 5 9 30 30 9 31 31 9 32 31 9 31 31 10 33 33 5 10 33 5 34 5 10 33 5 33 5 10 33 5 33 5 11...

Page 57: ...in Step 5 or higher When outdoor temperature 12 C 53 6 F it will run in Step 1 or higher Fan Steps Step Fan speed rpm RXSQ24 36TAVJU RXSQ48TAVJU RXSQ60TAVJU M1F M2F 1 200 200 250 0 2 250 250 400 0 3...

Page 58: ...Thermostat ON Outdoor unit actuator Electric symbol Pressure equalization control prior to startup Startup control 24 36class 48 class 60 class STEP 1 STEP 2 Compressor M1C M1C M1C 0 Hz Minimum freque...

Page 59: ...inimum frequency until Pc Pe 0 39 MPa 56 6 psi is achieved Outdoor fan M1F M1F M1F M2F From starting Ta 20 C 68 F STEP 1 Ta 20 C 68 F OFF STEP 8 STEP 8 Four way valve Y1S Y1S Y1S Holds ON ON Main elec...

Page 60: ...loads Outdoor unit actuator Electric symbol Oil return preparation operation Oil return operation After oil return operation 24 36class 48 class 60 class Compressor M1C M1C M1C Normal control Control...

Page 61: ...eturn preparation operation Oil return operation After oil return operation 24 36class 48 class 60 class Compressor M1C M1C M1C Upper limit control 0 rps STEP 25 load 24 36 class STEP 21 load 48 60 cl...

Page 62: ...valve Outdoor unit actuator Electric symbol Defrost preparation operation Defrost operation After defrost operation 24 36class 48 class 60 class Compressor M1C M1C M1C Upper limit control 0 rps STEP...

Page 63: ...STEP 6 load 24 36 class 24 rps 48 60 class Outdoor fan M1F M1F M1F M2F Fan control Fan control Four way valve Y1S Y1S Y1S OFF OFF Main electronic expansion valve Y1E Y1E Y1E 480 pulse Fully open 240...

Page 64: ...F Ta 30 C 86 F STEP 4 Ta 30 C 86 F OFF Four way valve Y1S Y1S Y1S Holds Main electronic expansion valve Y1E Y1E Y1E 0 pulse Subcooling electronic expansion valve Y3E 0 pulse Hot gas bypass valve Y2S O...

Page 65: ...503 psi Pc 3 38 MPa 490 psi Pc 3 78 MPa 548 psi Pc 3 63 MPa 526 psi Current step maintained After 1 minute After 10 sec High pressure not limited High pressure limited Pc High pressure sensor detecti...

Page 66: ...ep maintained After 10 sec High pressure not limited High pressure limited Lower limit frequency Pc High pressure sensor detection value Compressor upper limit frequency 5 step down from current compr...

Page 67: ...tes the error code E4 is output Low pressure standby Low pressure limited Current step limited Pe 0 25 MPa 35 6 psi After 10 seconds Pe 0 15 MPa 21 3 psi Pe 0 15 MPa 21 3 psi Pe 0 19 MPa 27 psi Pe 0 0...

Page 68: ...th outdoor air temperature HTdi 130 C 266 F 30 seconds Lower STEP HTdi 115 C 239 F Tp 150 C 302 F OR HTdi 105 C 221 F Tp 135 C 275 F Current step maintained Cooling 20 seconds Heating 60 seconds HTdi...

Page 69: ...tep up from current compressor frequency Inverter current standby Inverter current 13 7 A 24 36 class 21 8 A 48 60 class continues for 3 minutes Current step maintained Without conditions When occurri...

Page 70: ...mit requirement Compressor upper limit Maximum frequency 10 seconds Matching frequency Limited 15 seconds No DC power limit requirement continuously for 3 minutes Inverter upper limit frequency 1 step...

Page 71: ...s Furnace Operation Prohibition When a gas furnace is connected it cannot be operated in the following situations 1 During defrosting once in 4 hours 2 During test operation 3 During refrigerant charg...

Page 72: ...MP Drain pump kit ON MP Drain pump kit ON MP Closed Electronic expansion valve Capacity control Electronic expansion valve Closed YE MA OFF EH OFF EH Humidifier OFF Hu Humidifier OFF Hu YE The previo...

Page 73: ...Fan Operating in L mode MF Fan Operating in L mode after it stops for 6 min MF YE Drain pump kit YE MP Swing flap Swing flap Set wind direction Fan MF Operating with set airflow rate YE Closed Program...

Page 74: ...N OFF Humidifier OFF ON Humidifier ON OFF Humidifier OFF OFF MP Yes Yes No No No No 13 14 13 18 Yes Yes Yes Yes Swing flap Is defrost operation in progress Yes No Option Yes Swing flap Set wind direct...

Page 75: ...wind direction instruction from the remote controller the wind direction is set to 100 horizontal while in heating operation 12 Fan According to fan speed instruction from the remote controller the f...

Page 76: ...uction air thermistor Default setting When using the remote controller thermistor Field setting is required Examples are given to illustrate a control target temperature that satisfies the remote cont...

Page 77: ...target temperature for operation What is the temperature around people The temperature around people refers to the temperature of the living space obtained from the temperature around the ceiling and...

Page 78: ...the remote 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 te...

Page 79: ...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 80: ...to 02 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 s...

Page 81: ...to operate outside of use range To avoid the above condition a limit based on the suction air temperature is set for the use range of the temperature around people Cooling operation When the floor te...

Page 82: ...ng 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 Differen...

Page 83: ...closed Microcomputer control including cooling operation Swing L Swing Swing Swing Airflow direction set L Set Set Set Heating Hot start from defrost operation Swing OFF Horizontal Horizontal Horizon...

Page 84: ...before initiating the hot start OFF Hot start control Hot start in progress Normal control Normal control H L remote controller setting LL OFF Remote controller setting P0 Horizontal Fan Louver Endin...

Page 85: ...low compact multi flow and single flow types 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...

Page 86: ...y 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 t...

Page 87: ...e 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 cont...

Page 88: ...es lower As T Remote controller set temp Suction air temp becomes lower SHS becomes larger Subcooled degree control in heating operation This function is used to adjust the opening of the electronic e...

Page 89: ...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 90: ...total of 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 standa...

Page 91: ...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 92: ...tric heater Heating Automatic heating Auxiliary heater enabled 1 Not in heating Automatic heating Auxiliary heater enabled 0 3 Heater not allowed Heater allowed Heater 1 OFF Heater 2 OFF OR OR OR Ther...

Page 93: ...Liquid pipe temperature 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 r...

Page 94: ...set to the initial 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 T...

Page 95: ...ils Thermostat Step 1 ON CXTQ is during heat pump operation Not during defrost oil return operation Thermostat Step 2 ON Gas furnace operation requiring signal from outdoor unit ON 5 Field setting 11...

Page 96: ...omatically based on the room temperature trend 2 Ton S B C Toff S A C 3 For parameters refer to page 97 4 A and B values vary automatically based on the field setting 12 22 2 5 If directly after a cha...

Page 97: ...er to page 97 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 temp...

Page 98: ...CLEANER terminal on the PCB 2 Refer to page 106 for field setting 14 24 4 6 17 2 Humidifier When a humidifier is connected onsite the fan operates with the airflow rate set of the remote controller o...

Page 99: ...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 for...

Page 100: ...2 5 Monitor Mode 121 2 6 Setting of Low Noise Operation and Demand Operation 123 2 7 Setting of Refrigerant Recovery Mode 126 2 8 Setting of Vacuuming Mode 126 2 9 Final Charge Adjustment 126 2 10 Ch...

Page 101: ...ng 1 Press and hold Cancel button for 4 seconds or more Service settings menu is displayed 2 Select Field Settings in the Service Settings menu and press Menu OK button Field settings screen is displa...

Page 102: ...en returns 8 In the case of multiple setting changes repeat 3 to 7 9 After all setting changes are completed press Cancel button twice 10 Backlight goes out and Checking the connection Please standby...

Page 103: ...ST 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 butt...

Page 104: ...tted 7 9 Time for absence area detection 30 minutes 60 minutes 11 21 1 Auxiliary electric heater ON temperature Ton Refer to page 97 for details 2 Auxiliary electric heater OFF temperature Toff 3 Sett...

Page 105: ...low rate Refer to page 103 for details 1 Airflow direction setting Set when a blocking pad kit has been installed F 4 directions T 3 directions W 2 directions 2 9 Swing pattern settings All direction...

Page 106: ...nding type Air handling unit Cased Coil unit Round flow 4 way flow FXFQ FXZQ FXUQ FXEQ FXDQ FXSQ FXMQ FXHQ FXAQ FXLQ FXNQ FXTQ CXTQ Filter sign z z z z z z z z z z z z z Ultra long life filter sign z...

Page 107: ...s controlled by the suction air thermistor When the Second Code No is set to 03 room temperature is controlled by the remote controller thermistor Setting 10 20 1 01 Long life filter 02 Ultra long lif...

Page 108: ...6 2 62 6 69 8 73 4 77 80 6 84 2 87 8 91 4 95 98 6 F F 57 2 60 8 64 4 68 71 6 75 2 78 8 82 4 86 89 6 93 2 In cooling In heating Suction air temperature Suction air temperature Suction air thermistor Su...

Page 109: ...nce Area Detection For units with the infrared presence floor sensor only By selecting the energy saving operation mode in the absence the target temperature is shifted to the energy saving end by 1 C...

Page 110: ...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 9 F Mode No First Code No Symbol Se...

Page 111: ...4 F z 06 0 5 C 0 9 F z z z z z z z 05 0 C 0 F z z z z z z 04 0 5 C 0 9 F z z z z z 03 1 C 1 8 F z z z z 02 1 5 C 2 7 F z z z 01 2 C 3 6 F z z Mode No First Code No Second Code No Contents 11 21 3 01...

Page 112: ...absence Model Mode No First Code No Second Code No 01 02 03 04 05 06 07 08 09 10 Heater kW No heater kit 3 5 6 8 10 15 19 20 25 FXTQ09TAVJUA 11 21 5 z z z FXTQ09TAVJUD z z z FXTQ12TAVJUA z z z z FXTQ...

Page 113: ...02 as in the following table by indoor unit with the Mode No 11 21 If operation does not stop automatically or the Second Code No is not set to 02 return to the step 3 above to make settings again Not...

Page 114: ...de No Second 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...

Page 115: ...n power supply 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 f...

Page 116: ...than 3 0 m 10 ft Lower than 3 3 m 10 3 4 ft Lower than 3 8 m 12 1 2 ft 03 Higher Ceiling 2 Lower than 3 5 m 11 1 2 ft Lower than 3 5 m 11 1 2 ft Mode No First Code No Second Code No Contents Ceiling h...

Page 117: ...g for CXTQ TA models Change this setting from Standard to Low when connecting CXTQ with the following rated combinations Once Low is set the indoor airflow CFM will be equivalent to one tonnage lower...

Page 118: ...40 Pa 0 12 0 16 inWG 2 FXSQ54TA cannot be set to 30 40 Pa 0 12 0 16 inWG or 150 Pa 0 60 inWG Mode No First Code No Second Code No Contents 13 23 6 01 30 Pa 0 12 inWG 1 3 02 50 Pa 0 20 inWG 03 60 Pa 0...

Page 119: ...rst Code No Second Code No Contents UV lamp humidifier fan speed Economizer setting for Mech standby duration minutes 14 24 4 01 Refer to controller 10 02 High 10 03 Refer to controller 20 04 High 20...

Page 120: ...t to perform individual operation of Energy recovery ventilator using the remote controller central unit when Energy recovery ventilator is built in Switch only when Energy recovery ventilator is buil...

Page 121: ...equipped This setting will prevent 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...

Page 122: ...at Airflow Trim 15 10 OFF OFF OFF OFF 12 8 ON OFF OFF OFF 9 6 OFF ON OFF OFF 6 4 ON ON OFF OFF 3 2 OFF OFF ON OFF 0 0 ON OFF ON OFF 3 2 OFF ON ON OFF 6 4 ON ON ON OFF 9 6 OFF OFF OFF ON 12 8 ON OFF OF...

Page 123: ...only possible by remote controller Used when you want to turn on by centralized remote controller only and off by remote controller only Centralized Used when you want to turn on by centralized remot...

Page 124: ...e control Operation mode setting Unified operation individual operation by centralized remote controller or operation controlled by timer Unified OFF individual stop by centralized remote controller o...

Page 125: ...apacity Setting Caution Be sure to carry out capacity setting after changing the main PCB A1P to spare PCB for RXSQ48 60TAVJU only Attach the capacity setting adaptor corresponding to capacity class t...

Page 126: ...inks Used to check the program made in setting mode 2 H1P H3P H5P H7P H2P H4P H6P MODE BS1 SET BS2 TEST BS4 RESET BS5 RETURN BS3 Contents display Monitor mode Press the RETURN BS3 button Press the RET...

Page 127: ...er to information in table on the right Press the RETURN BS3 button and return to the initial status of setting mode 1 h h h h h h l h h h l h h h l h h h h h h k ON h OFF l Blink Procedure for checki...

Page 128: ...r vacuuming mode 22 Night time low noise setting Sets automatic nighttime low noise operation in a simple way The operating time is based on Starting Set and Ending Set 25 Setting of low noise level S...

Page 129: ...is smaller than the auxiliary heater maximum allowable temperature 56 Auxiliary heater maximum allowable temperature release differential Auxiliary heater is not allowed to energize when the outdoor a...

Page 130: ...k h h h h h k Existing pipe connection Gas side Larger pipe Liquid side Insulated k h h h h k h Existing pipe connection Gas side Standard diameter Liquid side Not insulated 1 k h h h h k k 5 Indoor...

Page 131: ...k OFF k h h h h h k ON k h h h h h h 20 Additional refrigerant charge operation setting k h k h k h h Refrigerant charging OFF k h h h h h k Refrigerant charging ON k h h h h k h 21 Refrigerant recov...

Page 132: ...k h h h k k h 41 Cooling comfort setting k k h k h h k Eco k h h h h h h Mild k h h h h h k Quick k h h h h k h Powerful k h h h k h k 42 Heating comfort setting k k h k h k h Eco k h h h h h h Mild k...

Page 133: ...llowable temperature release differential k k k k h h h 2 8 C 5 F k h h h h h h 5 6 C 10 F k h h h h h k 8 3 C 15 F k h h h h k h 57 Heat pump lockout temperature k k k k h h k 26 1 C 15 F k h h h h h...

Page 134: ...code table Refer to page 152 15 Error description 1 cycle before l h h k k k k 16 Error description 2 cycle before l h k h h h h 20 Contents of retry the latest l h k h k h h 21 Contents of retry 1 cy...

Page 135: ...ary number which translates to 16 4 2 22 base 10 number In other words the address is 22 The number of terminal blocks for No 12 and 13 is expressed as an 8 digit binary number which is the combinatio...

Page 136: ...or the item 2 27 Use the ending time as a guide since it is estimated according to outdoor temperatures 4 If necessary while in setting mode 2 set the item 2 29 Capacity precedence to ON If the condit...

Page 137: ...ting mode 2 set the item 2 32 Constant demand to ON 2 While in setting mode 2 set the item 2 30 Demand 1 level and then set the setting condition to targeted mode Image of operation Set item Condition...

Page 138: ...z OFF l Blink 1 2 3 Setting No Setting contents Setting No indication Setting No indication Setting contents Setting contents indication Initial setting H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P...

Page 139: ...covery vacuuming mode to ON The respective expansion valve of indoor and outdoor units are fully opened Test Operation and Under Centralized Control are displayed on the remote controller and the indo...

Page 140: ...d of installation on site the system is provided with a test operation mode enabling check for incorrect wiring stop valve left in closed coming out or misplacing with suction pipe thermistor or disch...

Page 141: ...EST H2P C H selection Low noise H6P Demand H7P IND H3P Master H4P Slave H5P Factory setting 50 Auxiliary heater maximum allowable temperature k k k h h k h 17 7 C 0 F k h h h h h h 15 C 5 F k h h h h...

Page 142: ...e 2 k h h h h k h Mode 3 k h h h h k k Mode 4 k h h h k h h Mode 5 k h h h k h k Mode 6 k h h h k k h Type Description Actions Field setting Shorted between Heating Thermo on Heating Thermo off Heater...

Page 143: ...t source to be automatically energized in the event of a system failure related to outdoor units No Setting item display Setting condition display Setting item MODE H1P TEST H2P C H selection Low nois...

Page 144: ...e circuits Are the setscrews of wiring not loose Is the electrical component box covered with an insulation cover completely Is refrigerant charged up to the specified amount If insufficient charge th...

Page 145: ...ton switches and changeover switches when setting the outdoor unit PCB A2P For positions of the button switches BS1 5 and changeover switches DS1 1 2 on the PCB refer to the Service Precautions label...

Page 146: ...ant charging and auto determination of piping length After test operation is completed if there is no error code on the display of the remote controller the unit can perform normal operation 3 minutes...

Page 147: ...d the timer lamps on all indoor units go out The indoor unit has the option rights to change between cooling heating operation For details refer to the installation manual included with the indoor uni...

Page 148: ...stopped if the compressor is runnning at this time After that the gas furnace will run in tens of seconds Tens of minutes might well be needed to stop compressor if the outdoor unit is particular ope...

Page 149: ...thermistor R2T Short circuit Check the connection of the PCB or the actuator J5 Defective suction pipe thermistor R3T and R5T Tripping Check the connection of the PCB or the actuator J6 Defective outd...

Page 150: ...the maximum number of units that can be connected through monitoring mode or if initiation is complete No display Error in connection communication among indoor unit remote controllers Check if there...

Page 151: ...tion cannot be recognized In this case the unit cannot be run for up to 12 minutes to automatically set the address indoor outdoor address etc Status Outdoor unit Test lamp H2P Blinks Can also be set...

Page 152: ...Motor M1F Lock Overload 165 4 8 Indoor Fan Motor Abnormality 168 4 9 Blower Motor Not Running 172 4 10 Indoor Fan Motor Status Abnormality 173 4 11 Low Indoor Airflow 174 4 12 Swing Flap Motor Abnorm...

Page 153: ...225 4 51 Transmission Error between Indoor Units and Outdoor Unit 226 4 52 Transmission Error between Remote Controller and Indoor Unit 228 4 53 Transmission Error between Main and Sub Remote Controll...

Page 154: ...Check 262 5 7 Vacuuming and Dehydration Procedure 263 5 8 List of Inverter Related Error Codes 264 5 9 Concept of Inverter Related Error Codes 265 5 10 Thermistor Check 266 5 11 Pressure Sensor Check...

Page 155: ...r maintaining the service cover After maintenance make sure to close the service cover Otherwise leakage of water or contamination by foreign matter may cause defects 3 Precautions for maintaining the...

Page 156: ...06 42 43 6 0 16 23 2 12 10 4 0 54 78 3 18 64 4 1 37 199 48 118 4 2 93 425 40 40 0 18 26 1 10 14 0 57 82 7 20 68 0 1 45 210 50 122 0 3 07 445 38 36 4 0 19 27 6 8 17 6 0 61 88 5 22 71 6 1 53 222 52 125...

Page 157: ...ing 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 immed...

Page 158: ...rding 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 will stop...

Page 159: ...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 160: ...the range P0 P3 8 When using airflow block the airflow block will be routinely lifted become horizontal during heating operation No defect Set louver to horizontal P0 during thermostat OFF 9 Although...

Page 161: ...king with room temperature Some models are enabled to support automatic switching between gas furnace and heat pump interlocking with outdoor air temperature by setting heat pump lockout on an outdoor...

Page 162: ...2 Take corrective action Screen Operation lamp Operation Status Display Abnormal shutdown The system stops operating The operation lamp green starts to blink The message Error Push Menu button blinks...

Page 163: ...ion in step 4 until you hear a continuous beep This continuous beep indicates that the error code is confirmed Continuous beep There is no abnormality 3 Press MODE button The left 0 upper digit indica...

Page 164: ...to the normal mode 0 1 2 3 4 5 6 7 8 9 A H C J E F UP button DOWN button If no button is pressed for 1 minute equipment returns to normal mode 3 Press MODE button The upper digit blinks Normal mode 1...

Page 165: ...mality 187 C6 l Combination error between indoor unit PCB and fan PCB 188 Blower motor HP mismatch 189 Indoor blower does not have required parameters to function 190 C9 2 l Suction air thermistor abn...

Page 166: ...9 U9 l Transmission error between indoor and outdoor units in the same system 230 UA l Improper combination of indoor and outdoor units indoor units and remote controller 231 Incorrect gas furnace con...

Page 167: ...2A on the panel PCB and the connectors X18A and X19A on the sensor PCB AH 05 Dust collection sign error when the self cleaning decoration panel is mounted Check for clogging with dust at the dust coll...

Page 168: ...self cleaning decoration panel is mounted An outdoor unit is not applicable for the self cleaning decoration panel is connected UA 17 Incorrect electric heater capacity setting Refer to page 234 UH 0...

Page 169: ...abnormality Main E9 Subcooling Abnormal discharge pipe temperature Abnormal Tdi F3 Defective thermistor of outdoor air temperature Defective Ta sensor short H9 Defective discharge pipe thermistor Def...

Page 170: ...h h h h h l k k h h 1 J3 l l h h l l h l h k h h l l l k h h h h h l k k h h 1 J5 l h k h l h l l k h h h h h l k k h h l k k h l J6 l h k h l l h l k h h h h h l k k h h J7 l h k h l l l l k h h h h...

Page 171: ...Code Inverter over ripple protection Imbalance of inverter power supply voltage P1 Defective temperature sensor of inverter radiation fin Defective thermistor of inverter fin P4 Refrigerant shortage...

Page 172: ...h h U2 l h k h h l h l k h h h h h l k k h h h h l k k h l h h l k k h h l h l k k h h h l U3 l h k h h l l l k h h h h h l k k h h l l U4 l h k h l h h l k h h h h h l k k h h l l l k k h l l l U9 l...

Page 173: ...l protection device Improper field setting Defective indoor unit PCB Troubleshooting ON OFF input from outside mode No 12 first code No 1 has been set to external protection device input second code N...

Page 174: ...n 24 VAC power is not supplied to TH2 and TR2 terminals FXTQ TA or R and C terminals CXTQ TA on the indoor unit PCB Troubleshooting Fuse F1U is blown 24 VAC power is supplied to TH2 and TR2 terminals...

Page 175: ...latile memory Maintains memory contents even when the power supply is turned OFF Supposed Causes Defective indoor unit PCB External factor Noise etc Troubleshooting YES Caution Be sure to turn off the...

Page 176: ...nnecting connectors or parts may be damaged Replace the float switch Modify the float switch s connection and turn ON again Connect the drain pump and turn ON again Connect either a short circuit conn...

Page 177: ...the indoor unit A The voltage of drain pump terminals 2 is in accordance to the criteria 3 within 5 minutes of resetting the power supply Model 1 Float switch S1L short circuit connector 2 Drain pump...

Page 178: ...not increase Supposed Causes Broken wires in short circuit of or disconnection of connectors from the fan motor harness Defective fan motor Broken wires or defective insulation Abnormal signal output...

Page 179: ...r YES YES NO Are there any foreign matter around the fan YES NO Is the resistance between the pins less than the judgment criteria Replace the indoor unit main PCB A1P Disconnect the connector from th...

Page 180: ...TA X20A Relay connector FXUQ P X20A Relay connector FXEQ P X20A FXSQ05 48TA X8A 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 or mo...

Page 181: ...voltage to the fan Supposed Causes Defective indoor fan motor Broken wires Defective contact Troubleshooting YES NO NO YES Check the indoor fan motor and the wiring circuits of the fan motor Replace...

Page 182: ...the position signal of the fan motor Error from the current flow on the fan PCB when the fan motor starting operation Error Decision Conditions An overcurrent flows The rotation speed is less than a...

Page 183: ...ign matter around the fan Connect the connector properly Replace the indoor fan motor Replace the indoor fan motor Connect the connector properly Caution Be sure to turn off the power switch before co...

Page 184: ...C HW HV or HU terminals of the motor connector with five conductors YES NO Turn on the power Remove the signal connector from the fan motor and check the resistance 2 Theresistance amongU V andWareunb...

Page 185: ...malities 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 ove...

Page 186: ...If 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 receivin...

Page 187: ...ts 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 Co...

Page 188: ...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 turn of...

Page 189: ...S 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...

Page 190: ...ective 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 connecting...

Page 191: ...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 192: ...ction 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...

Page 193: ...de of the gas furnace Refer to the gas furnace manual for details Troubleshooting Note 1 In some cases of gas furnace abnormality regarding gas combustion once an error occurs display indication of AA...

Page 194: ...mpressor 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 i...

Page 195: ...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 196: ...nsmission conditions between the indoor unit main 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 197: ...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 connectin...

Page 198: ...l 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 i...

Page 199: ...sed Causes Disconnection of the communication wire between the CXTQ TA and the gas furnace Power supply to the gas furnace is cut Troubleshooting NO Caution Be sure to turn off the power switch before...

Page 200: ...1 for C9 for FXTQ TA and CXTQ TA models Refer to page 266 Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Remove the thermistor from...

Page 201: ...acity setting adaptor Field setting error Troubleshooting NO Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Was the indoor unit main...

Page 202: ...tion 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 203: ...ncluded 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...

Page 204: ...PCB Troubleshooting Note 1 Connector and indoor unit PCB Refer to page 266 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...

Page 205: ...s in 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...

Page 206: ...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 207: ...ess data No 22 25 Connect the connector correctly Connect the connector correctly NO YES YES NO YES YES Is the connection of the sensor connector normal Normal NO Displays 15 by the above verification...

Page 208: ...address data No 26 Connect the connector correctly Connect the connector correctly NO YES YES NO YES YES Is the connection of the sensor connector normal Normal NO Displays by the above verification m...

Page 209: ...output refer to sensor and address data No 26 Is the connection of the sensor connector normal Displays by the above verification method Displays CE 03 again or for sensor and address data Replace th...

Page 210: ...output refer to sensor and address data No 26 Is the connection of the sensor connector normal Displays by the above verification method Displays CE 04 again or for sensor and address data Replace th...

Page 211: ...oubleshooting 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 mode Clear the error code history 1 Whi...

Page 212: ...ection between the indoor unit and the outdoor unit are not normal Supposed Causes Defective outdoor main PCB A1P Disconnection of the inside outside relay wires Troubleshooting Caution Be sure to tur...

Page 213: ...ure switch conduction Error Decision Conditions Error is generated when the high pressure switch activation count reaches the number specific to the operation mode When part of the protection device h...

Page 214: ...Mount a pressure gauge on the high pressure service port 2 Reset the operation using the remote controller and then restart the operation Does the abnormal stop E3 recur Replace the high pressure swit...

Page 215: ...ith the low pressure sensor Use the outdoor main PCB to determine the low pressure sensor pressure test value Error Decision Conditions Error is generated when the low pressure drops below a specific...

Page 216: ...re sensor normal 1 Check if the low pressure value and the actual value measured by pressure sensor are the same Replace the low pressure sensor The low pressure sensor is normal and the pressure dete...

Page 217: ...5 MPa 72 5 psi and above Incorrect UVW wiring Defective PCB Stop valve is not opened Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts...

Page 218: ...e pressure equalization Check the refrigerant system YES Power ON Power OFF Power OFF Power ON Power OFF Power ON NO NO Replace the outdoor main PCB A1P NO Continue the operation Instantaneous power f...

Page 219: ...e fan motor operation Error Decision Conditions In the condition of fan motor rotation the number of rotation is below the fixed number for more than 6 seconds System down is caused by 4 times of dete...

Page 220: ...Does the fan motor connector disconnect Are there any obstacles around the fan Is pin to pin resistance greater than the threshold value Is fuse F6U blown Is fuse F6U blown Do the fan blades spin smoo...

Page 221: ...Disconnection of connectors for electronic expansion valve Troubleshooting Refer to page 273 YES Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts ma...

Page 222: ...isconnection of discharge pipe thermistor R2T Defective outdoor unit PCB Troubleshooting Refer to page 266 Be sure to turn off the power switch before connecting or disconnecting connectors or parts m...

Page 223: ...cting or disconnecting connectors or parts may be damaged Connector is connected to outdoor unit PCB Replace the outdoor main PCB A1P Connect the connector and turn on again NO NO Replace the defectiv...

Page 224: ...switch before connecting or disconnecting connectors or parts may be damaged Replace the outdoor main PCB A1P Replace the high pressure sensor S1NPH YES NO Replace the outdoor main PCB A1P NO Replace...

Page 225: ...h before connecting or disconnecting connectors or parts may be damaged Are the characteristics of the low pressure sensor normal Make a comparison between the voltage characteristics and the gauge pr...

Page 226: ...nit Error Decision Conditions Overcurrent OCP flows during waveform output Error of current sensor during synchronous operation IPM failure Supposed Causes IPM failure Current sensor failure Drive cir...

Page 227: ...mistor Troubleshooting Defective radiation from the power unit Blocked air suction port Stained radiation fin High outdoor air temperature Connect correctly Eliminate P4 error Keep operating Replace t...

Page 228: ...PCB Troubleshooting Refer to page 260 Replace the outdoor main PCB A1P YES YES NO NO YES NO NO Check if the power transistor is normal Failure occurs again after restarting the unit YES Caution Be su...

Page 229: ...to page 260 NO YES YES NO Check if the compressor lead wires are normal Insulation resistance of the compressor is 100 k or below YES NO NO Caution Be sure to turn off the power switch before connect...

Page 230: ...or disconnecting connectors or parts may be damaged NO NO NO YES YES YES Does L9 blink after reconnecting to the power When operation starts is the high and low pressure difference greater than 0 2 MP...

Page 231: ...e noise filter External factors Noise etc Defective inverter compressor Defective fan motor Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors o...

Page 232: ...power supply with a missing phase Supposed Causes Defective main circuit capacitor Incorrect main circuit wiring Defective outdoor unit PCB Unbalanced voltage between phases Missing phase Troubleshoot...

Page 233: ...ive radiation fin temperature thermistor Defective PCB Defective inverter compressor Defective fan motor Troubleshooting Refer to page 266 Caution Be sure to turn off the power switch before connectin...

Page 234: ...the discharge pipe thermistor temperature and the low pressure saturated temperature Error Decision Conditions Microcomputer is used to determine and check for system refrigerant shortage The unit ca...

Page 235: ...reater than 20 C 68 F Is the resistance measured from suction pipe thermistor disconnected from the outdoor unit PCB normal Is the voltage between X18A pins 2 and 3 of outdoor main PCB A1P less or equ...

Page 236: ...thod of Error Detection The main circuit capacitor voltage of the inverter and the power supply voltage is checked Error Decision Conditions The main circuit capacitor of the tested inverter has abnor...

Page 237: ...r failing Is the resistance greater than the standard Measure voltage between and of the electrolytic capacitor C C when the compressor is operating Calibrate the power voltage If L2 and Phase N are d...

Page 238: ...on Conditions Error is decided when the unit starts operation without check operation Supposed Causes Check operation not executed Troubleshooting Replace the outdoor main PCB A1P Press the TEST BS4 b...

Page 239: ...ddress does not match Defective indoor unit PCB Defective outdoor main PCB Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Ca...

Page 240: ...x the indoor outdoor unit transmission wiring Press and hold the RESET BS5 button on the outdoor unit PCB for 5 seconds Replace the outdoor main PCB A1P YES NO NO Replace the outdoor main PCB A1P YES...

Page 241: ...oubleshooting Refer to page 29 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 blinkin...

Page 242: ...main and sub remote controller Connection between sub remote controllers Defective remote controller PCB Troubleshooting Refer to page 29 for Main Sub setting Caution Be sure to turn off the power sw...

Page 243: ...electronic expansion valve in indoor unit of other system Defective PCB of indoor unit in other system Improper connection of transmission wiring between indoor and outdoor unit Troubleshooting Cautio...

Page 244: ...ata by the type of refrigerant between indoor and outdoor units The number of indoor units is out of the allowable range Error Decision Conditions The error decision is made as soon as either of the a...

Page 245: ...the outdoor unit PCB replaced by the backup PCB Is the refrigerant type of the indoor unit and outdoor unit matched Is the total number of indoor units displaying UA and indoor units connectable to th...

Page 246: ...furnace and other indoor units other than CXTQ are connected Error Decision Conditions Check that two or more CXTQ gas furnace and other indoor units other than CXTQ are not connected Operation After...

Page 247: ...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 248: ...n is made as soon as the abnormality aforementioned is detected Supposed Causes Address duplication of centralized controller Defective indoor unit PCB Troubleshooting Caution Be sure to turn off the...

Page 249: ...ks if transmission between indoor unit and centralized controller is normal Error Decision Conditions When transmission is not carried out normally for a certain amount of time Supposed Causes Transmi...

Page 250: ...ission wiring length types of cables and wires number of units connected and others If no problems replace the indoor unit PCB NO YES YES Check the indoor unit for which UE is displayed Is the transmi...

Page 251: ...centralized controller and then check the voltage between the transmission terminals F1 and F2 of the master centralized controller transmission equipment using a multimeter It is supposed that the e...

Page 252: ...e check operation Supposed Causes Improper connection of transmission wiring between indoor outdoor units Failure to execute check operation Defective indoor unit PCB Stop valve is not opened Troubles...

Page 253: ...or units All outdoor units Method of Error Detection An indoor unit without automatically set address is detected Error Decision Conditions The error decision is made as soon as the abnormality aforem...

Page 254: ...e outdoor main PCB A1P Press and hold the RESET BS5 button on the outdoor unit PCB for 5 seconds Does an error occur even after 12 minutes elapses from the time when electricity is introduced to indoo...

Page 255: ...power of the gas furnace is turned on after a certain period of time has been elapsed after the power of the CXTQ was turned on Disconnection of the communication wire between the CXTQ and the gas fur...

Page 256: ...r communication with the gas furnace completes and after elapsing 4 minutes after the power is turned on Two or more gas furnaces are detected Any unit other than the gas furnace is detected Supposed...

Page 257: ...sitive polarity and negative polarity Supposed Causes Defective centralized controller PCB Defective intelligent Touch Controller PCB Defect of Schedule timer PCB Troubleshooting YES NO Is M1 displaye...

Page 258: ...Schedule timer Method of Error Detection DIII NET communication data is used to detect the error Automatic reset Error Decision Conditions When the slave centralized controller is activated there is...

Page 259: ...l the centralized controllers and replace the centralized controllers that fail to control the indoor unit 1 Intelligent Touch Controller screen operation If there is no display on the touch screen ad...

Page 260: ...thod of Error Detection DIII NET communication data is used to detect the error Error Decision Conditions There are other centralized controllers but the schedule timer is set for individual use There...

Page 261: ...then reset the power supply of all the centralized controllers If after this the error is resolved the centralized controller connected with the setting connector is faulty Replace the controller YES...

Page 262: ...dule timer Method of Error Detection DIII NET communication data is used to detect the error Error Decision Conditions Multiple centralized controllers or intelligent Touch Controllers are connected a...

Page 263: ...nt CHECK 14 Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Is this the first test operation result using the intelligent Touch Contr...

Page 264: ...or unit PCB Defective air conditioner Troubleshooting NO YES NO NO NO YES YES Perform troubleshooting using the Air Conditioner Troubleshooting Manual Concurrently reset the power supply of all the ce...

Page 265: ...e the centralized controller PCB Connect the connector correctly Replace the centralized controller PCB Are all the indoor units experiencing transmission failure Does the indoor unit on which the err...

Page 266: ...ns The previously connected centralized controller is not responding Control range duplication There are multiple master centralized controllers There are other centralized controllers but the schedul...

Page 267: ...llers or the schedule timers Go to the next page A Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Are any connected centralized cont...

Page 268: ...y of all the centralized controllers If after this the error is resolved the centralized controller connected with the setting connector is faulty Replace the controller Not available for combined use...

Page 269: ...setting switch set incorrectly Wiring connection error Troubleshooting NO YES NO YES NO YES Use the remote controller to set the centralized control address for all the indoor units connected with the...

Page 270: ...Mixingofnon condensablegas Decreased airflow rate Decreased fan output Defective fan motor Defective main PCB Including capacity setting High airflow passage resistance Dirty filter Obstacle Excessiv...

Page 271: ...normal piping length Bent or crashed pipe Cloggingofforeignmaterials Stop valve closed Less circulation quantity of refrigerant Degradation in evaporating capacity Refrigerant shortage Moisture choke...

Page 272: ...ive subcooling electronic expansion valve control Superheat due to shaft damage Superheat due to defective compressor Defective indoor unit electronic expansion valve Defective control Defective contr...

Page 273: ...er Measurement in the resistance value mode in the range of multiplying 1 k To use digital multimeter Measurement is executed in the diode check mode No Point of Measurement Judgment Criteria Remarks...

Page 274: ...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 275: ...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 276: ...si 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 leakage m...

Page 277: ...Defective PCB for inverter compressor No output is given Defective heavy current part of compressor L4 Radiation fin temperature rise The radiation fin temperature reaches 87 C 188 F or more while in...

Page 278: ...conds Defective startup of inverter compressor Compressor stops running immediately after it starts up Defective radiation inverter When transmissions between the microcomputers on the main PCB are no...

Page 279: ...J Type J FXHQ M FXAQ P FXLQ M FXNQ M FXTQ TA Type A CXTQ TA FXMQ MF Type B Type J Type J Model Thermistor Type RXSQ24 36TAVJU R1T Outdoor air E R2T Discharge pipe G R3T Suction pipe 1 A R4T Heat exch...

Page 280: ...417 20 68 24 95 25 0060 25 02 24 98 25 0554 25 77 19 94 20 0000 20 00 20 00 20 0395 30 86 16 04 16 1008 16 10 16 12 16 1326 35 95 12 99 13 0426 13 04 13 07 13 0683 40 104 10 58 10 6281 10 63 10 67 10...

Page 281: ...42 10 31 45 113 8 439 96 13 87 0725 8 7834 8 447 50 122 6 954 78 29 71 7703 7 2479 6 962 55 131 5 761 64 10 59 4735 6 0131 5 769 60 140 4 797 52 76 49 5180 5 0144 4 805 65 149 4 014 43 63 41 4168 4 20...

Page 282: ...5 0 0 5 0 5 0 0 5 1 1 5 2 2 5 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...

Page 283: ...bined use 2 The intelligent Touch Controller centralized remote controller and the unified ON OFF controller have been set to Provided with the master unit centralized setting connector at the factory...

Page 284: ...escribed in the list of setting of master unit centralized setting connector CHECK 14 1 2 3 4 Master Slave 1 2 3 4 Pattern 1 00 4 15 Master Slave 5 00 8 15 Master Slave 1 00 4 15 Master Slave 5 00 8 1...

Page 285: ...ion wiring has no broken wires in it If there is no continuity the transmission wiring may have broken wires With the indoor outdoor unit terminal of outdoor unit short circuited identify the areas wi...

Page 286: ...sistance and make sure that the resistance value is within the range listed in the table below FXFQ T FXFQ P FXZQ TA FXUQ P FXEQ P FXSQ TA FXZQ M FXMQ PB FXAQ P CHECK 16 1 White 2 Orange 3 Brown 4 Blu...

Page 287: ...e below RXSQ48 60TAVJU Orange White Yellow Red Brown Blue Measuring points White Orange White Red Yellow Blue Yellow Brown Judgment criteria 300 150 300 150 Measuring points 1 6 2 6 3 6 4 6 Judgment c...

Page 288: ...SiUS331708EA 275 Appendix Part 7 Appendix 1 Wiring Diagrams 276 1 1 Outdoor Unit 276 1 2 Indoor Unit 279 1 3 Air Treatment Equipment 294...

Page 289: ...SiUS331708EA Wiring Diagrams Appendix 276 1 Wiring Diagrams 1 1 Outdoor Unit RXSQ24 36TAVJU 3D109545A...

Page 290: ...Wiring Diagrams SiUS331708EA 277 Appendix RXSQ48TAVJU 3D109546A...

Page 291: ...SiUS331708EA Wiring Diagrams Appendix 278 RXSQ60TAVJU 3D109547A...

Page 292: ...Wiring Diagrams SiUS331708EA 279 Appendix 1 2 Indoor Unit FXFQ07 09 12 15 18 24 30 36 48TVJU 3D086460B...

Page 293: ...SiUS331708EA Wiring Diagrams Appendix 280 BYCQ125BGW1 Self Cleaning Decoration Panel for FXFQ TVJU 3D076375A...

Page 294: ...LIGHT EMITTING DIODE SERVICE MONITOR GREEN MAGNETIC RELAY M1P MOTOR INDOOR FAN MOTOR DRAIN PUMP MOTOR SWING FLAP THERMISTOR AIR THERMISTOR COIL LIQUID THERMISTOR COIL GAS FLOAT SWITCH DIODE BRIDGE TER...

Page 295: ...SiUS331708EA Wiring Diagrams Appendix 282 FXZQ05 07 09 12 15 18TAVJU 3D110443A...

Page 296: ...STOR COIL LIQUID THERMISTOR COIL GAS FLOAT SWITCH TRANSFORMER 208 230V 25V TRIAC TERMINAL BLOCK TERMINAL BLOCK ELECTRONIC EXPANSION VALVE WIRELESS REMOTE CONTROLLER RECEIVER DISPLAY UNIT PRINTED CIRCU...

Page 297: ...CENTRAL REMOTE CONTROLLER CONNECT IT TO THE UNIT IN ACCORDANCE WITH THE ATTACHED INSTALLATION MANUAL 3 IN CASE OF MAIN SUB CHANGEOVER SEE THE INSTALLATION MANUAL ATTACHED TO REMOTE CONTROLLER 4 SYMBOL...

Page 298: ...Wiring Diagrams SiUS331708EA 285 Appendix FXEQ07 09 12 15 18 24PVJU 3D098557A...

Page 299: ...NITOR GREEN MAGNETIC RELAY M1P MOTOR INDOOR FAN MOTOR DRAIN PUMP THERMAL PROTECTOR M1F EMBEDDED THERMISTOR AIR THERMISTOR COIL 1 THERMISTOR COIL 2 FLOAT SWITCH TRANSFORMER 208 230V 25V PHASE CONTROL C...

Page 300: ...Wiring Diagrams SiUS331708EA 287 Appendix FXSQ05 07 09 12 15 18 24 30 36 48 54TAVJU 3D110467B...

Page 301: ...SiUS331708EA Wiring Diagrams Appendix 288 FXMQ07 09 12 15 18 24 30 36 48 54PBVJU 3D093209B...

Page 302: ...Wiring Diagrams SiUS331708EA 289 Appendix FXHQ12 24 36MVJU 3D048116C...

Page 303: ...SiUS331708EA Wiring Diagrams Appendix 290 FXAQ07 09 12 18 24PVJU 3D075354C...

Page 304: ...CT IT TO THE UNIT IN ACCORDANCE WITH THE ATTACHED INSTALLATION MANUAL 4 WHEN CONNECTING THE INPUT WIRES FROM OUTSIDE FORCED OFF OR ON OFF CONTROL OPERATION CAN BE SELECTED BY REMOTE CONTROLLER IN DETA...

Page 305: ...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 306: ...ON TERMINAL PLUG CONNECTION EQUIPMENT GND FIELD GROUND 0140D00002 A X3A X38A BS1 X12A X13A HAP X8A INDOOR UNIT PCB THERMISTOR HEAT EXCHANGER 1 2 MPU EEV COIL M K3R TB6 TB8 LEARN PS TB5 TB4 ACC OUT REL...

Page 307: ...SiUS331708EA Wiring Diagrams Appendix 294 1 3 Air Treatment Equipment 1 3 1 Outdoor Air Processing Unit FXMQ48 72MFVJU 3D065426D...

Page 308: ...Wiring Diagrams SiUS331708EA 295 Appendix 1 3 2 Energy Recovery Ventilator VAM Series VAM300 470 600GVJU 3D073269D...

Page 309: ...SiUS331708EA Wiring Diagrams Appendix 296 VAM1200GVJU 3D073270D...

Page 310: ...Revision History Month Year Version Revised contents 08 2017 SiUS331708E First edition 09 2018 SiUS331708EA Model addition FXZQ05 18TAVJU FXSQ05 54TAVJU...

Page 311: ...ble standards and is suitable for use in the region where the product will be used This statement does not purport to exclude restrict or modify the application of any local legislation z Ask a qualif...

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