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Daikin VRV IV-S RXTQ-TAVJU Series, Service Manual

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Daikin VRV IV-S RXTQ-TAVJU Series Service Manual Download Page 159

SiUS331604E

Troubleshooting by Error Code

Service Diagnosis

146

4.6

Overload/Overcurrent/Indoor Fan Motor Lock

Error Code

A6

Applicable 
Models

FXMQ-M

Method of Error 
Detection

This error is detected by detecting that the individual power supply for the fan turns OFF.

Error Decision 
Conditions

When it is not detected that the individual power supply for the indoor fan turns ON while in 
operation.

Supposed 
Causes

„

Defective power supply for the indoor unit fan motor

„

Clogged drain piping

„

Actuation of the indoor unit safety device

„

Defective contact in the fan wiring circuit

Troubleshooting

Properly connect the cable.

NO

YES

YES

Is the 

power supply 

cable of the indoor 

unit fan properly 

connected?

NO

Is the fan 

normally running?

Restart the fan.

Replace the indoor unit PCB.

It is supposed that the indoor 
unit fan motor stops running 
due to overload, overcurrent, or 
lock.

Caution

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

Summary of Contents for VRV IV-S RXTQ-TAVJU Series

Page 1: ...Service Manual SiUS331604E RXTQ36 48 60TAVJU Heat Pump 60 Hz...

Page 2: ...00 F5 3 FXHQ M EDUS391100 F6 2 3 FXAQ P EDUS391502 F7 4 7 FXLQ M FXNQ M EDUS391000 F12 2 3 FXTQ PA 2 Specifications Outdoor Unit EDUS331608 R 2 4 RXTQ T 3 Specifications Energy Recovery Ventilator EDU...

Page 3: ...ant Circuit 6 1 Refrigerant Circuit 7 1 1 RXTQ36TAVJU 7 1 2 RXTQ48TAVJU 9 1 3 RXTQ60TAVJU 11 2 Functional Parts Layout 13 2 1 RXTQ36TAVJU 13 2 2 RXTQ48TAVJU 14 2 3 RXTQ60TAVJU 16 Part 3 Remote Control...

Page 4: ...tion 39 3 3 Defrost Operation 41 3 4 Pump down Residual Operation 42 3 5 Restart Standby 43 3 6 Stopping Operation 43 4 Protection Control 44 4 1 High Pressure Protection Control 44 4 2 Low Pressure P...

Page 5: ...te Controller 96 2 5 Field Setting of Operation Control Mode 96 3 Field Setting from Outdoor Unit 99 3 1 Capacity Setting 99 3 2 Setting Mode and Monitor Mode 100 3 3 Setting Mode 1 101 3 4 Setting Mo...

Page 6: ...tivation of Low Pressure Sensor 169 4 22 Inverter Compressor Motor Lock 171 4 23 Outdoor Fan Motor Abnormality 173 4 24 Electronic Expansion Valve Coil Abnormality 175 4 25 Discharge Pipe Temperature...

Page 7: ...lity Refrigerant System Address Undefined 207 4 50 Defective PCB 209 4 51 Transmission Error between Centralized Controllers 210 4 52 Poor Centralized Controller Combination 212 4 53 Address Duplicati...

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: ...formation 1 Model Names of Indoor Outdoor Units 2 1 1 Indoor Unit 2 1 2 Air Treatment Equipment 2 1 3 Outdoor Unit 2 2 External Appearance 3 2 1 Indoor Unit 3 2 2 Air Treatment Equipment 4 2 3 Outdoor...

Page 15: ...Blow Cassette Type FXEQ 07P 09P 12P 15P 18P 24P Slim Ceiling Mounted Duct Type FXDQ 07M 09M 12M 18M 24M Ceiling Mounted Duct Type Middle and High Static Pressure FXMQ 07PB 09PB 12PB 15PB 18PB 24PB 30...

Page 16: ...low type FXFQ P Shown with BYCP125K W1 Ceiling suspended type FXHQ M 4 way ceiling mounted cassette 2 2 type FXZQ M Shown with BYFQ60B3W1 Wall mounted type FXAQ P 4 way blow ceiling suspended type FXU...

Page 17: ...ternal Appearance General Information 4 2 2 Air Treatment Equipment 2 3 Outdoor Unit Outdoor air processing unit FXMQ MF Energy recovery ventilator VAM series VAM G RXTQ60TAVJU RXTQ36TAVJU RXTQ48TAVJU...

Page 18: ...ex of the outdoor units Type Min combination ratio Max combination ratio Types of connected indoor units VRV indoor units Single outdoor units 50 130 Model Name RXTQ36TAVJU RXTQ48TAVJU RXTQ60TAVJU Cap...

Page 19: ...efrigerant Circuit 6 Part 2 Refrigerant Circuit 1 Refrigerant Circuit 7 1 1 RXTQ36TAVJU 7 1 2 RXTQ48TAVJU 9 1 3 RXTQ60TAVJU 11 2 Functional Parts Layout 13 2 1 RXTQ36TAVJU 13 2 2 RXTQ48TAVJU 14 2 3 RX...

Page 20: ...ncrease 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 Pressu...

Page 21: ...US331604E Refrigerant Circuit Refrigerant Circuit 8 2 16 1 15 S1NPH S1NPL S1PH 12 18 17 13 14 5 8 7 9 4 6 10 11 3 C 3D082498B The radiation fin thermistor 18 is located near the electrical component b...

Page 22: ...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 10 Pressure regulating valve 1 Receiver to discharge pipe This valve...

Page 23: ...iUS331604E Refrigerant Circuit Refrigerant Circuit 10 C 3D088594 The radiation fin thermistor 17 is located near the electrical component box 2 11 17 16 12 14 13 4 3 9 10 5 15 7 S1NPH S1NPL S1PH 8 6 1...

Page 24: ...58 167 F to 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 incr...

Page 25: ...efrigerant Circuit Refrigerant Circuit 12 2 11 18 17 12 5 14 S1NPH S1NPL S1PH 3 9 10 4 16 15 7 Low pressure sensor 8 6 1 13 C 3D088595A The radiation fin thermistor 18 is located near the electrical c...

Page 26: ...Solenoid valve Unload circuit Y3S High pressure sensor S1NPH Thermistor Discharge pipe R2T Thermistor Suction pipe 2 R5T Thermistor Suction pipe 1 R3T Electronic expansion valve Main Y1E Inverter comp...

Page 27: ...nsor S1NPL Four way valve Y1S Thermistor Discharge pipe R2T High pressure switch S1PH Crankcase heater Compressor M1C Four way valve coil Y1S Thermistor Suction pipe 2 R5T Solenoid valve Unload circui...

Page 28: ...T R3T R4T R5T R6T Y1E S1NPH S1NPL lead wire R2T R5T R6T S1NPH S1NPL lead wire R4T Y1E lead wire Four way valve coil Y1S Electronic expansion valve coil Main Y1E Thermistor Suction pipe 1 R3T Thermisto...

Page 29: ...ion valve Subcooling lead wire Y1E Four way valve lead wire Y1S Low pressure sensor S1NPL High pressure switch S1PH Crankcase heater Four way valve coil Y3S Thermistor Suction pipe 2 R5T Thermistor Di...

Page 30: ...ion valve Subcooling Y3E High pressure sensor S1NPH Low pressure sensor S1NPL lead wire Electronic expansion valve coil Main Y1E Electronic expansion valve coil Subcooling Y3E Thermistor Heat exchange...

Page 31: ...d Functions 20 2 1 BRC1E73 20 2 2 Wireless Remote Controller 22 3 MAIN SUB Setting 23 3 1 BRC1E73 23 3 2 Wireless Remote Controller 24 4 Centralized Control Group No Setting 25 4 1 BRC1E73 25 4 2 Wire...

Page 32: ...SiUS331604E 19 Remote Controller 1 Applicable Models Series Wired remote controller Wireless remote controller Navigation FXFQ BRC1E73 FXZQ BRC7E830 FXUQ FXEQ FXDQ BRC4C82 FXMQ FXHQ BRC7E83 FXAQ BRC7E...

Page 33: ...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 34: ...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 35: ...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 36: ...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 37: ...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 38: ...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 39: ...ith 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...

Page 40: ...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 41: ...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 42: ...r compressor 2 operation Indoor Unit Status 1 Unit No Select the Unit No you want to check 2 FAN Fan tap 3 FLAP Swing fixed 4 Speed Fan speed rpm 5 EV Degree that electronic expansion valve is open pu...

Page 43: ...mistor Forced Defrost SkyAir only 1 Forced defrost ON Enables the forced defrost operation 2 Forced defrost OFF Disables the forced defrost operation Error Display 1 Display Error ON Displays the erro...

Page 44: ...Control 46 4 3 Discharge Pipe Protection Control 47 4 4 Inverter Protection Control 48 5 Other Control 50 5 1 Demand Operation 50 5 2 Heating Operation Prohibition 50 6 Outline of Control Indoor Unit...

Page 45: ...essor 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 sto...

Page 46: ...Y1S Y1S OFF Main electronic expansion valve Y1E Y1E Y1E 480 pulse Fully open Subcooling electronic expansion valve Y3E PI control Hot gas bypass valve Y2S OFF This valve turns on with low pressure pr...

Page 47: ...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 saturat...

Page 48: ...to keep the superheated degree SH of the outlet gas pipe on the evaporator side for the full use of the subcooling heat exchanger RXTQ36TAVJU RXTQ48 60TAVJU Step Frequency Hz Step Frequency Hz 1 48 1...

Page 49: ...in Step 5 or higher When outdoor temperature 12 C 53 6 F it will run in Step 1 or higher Step Fan speed rpm RXTQ36TAVJU RXTQ48TAVJU RXTQ60TAVJU M1F M2F 1 200 200 250 0 2 250 250 400 0 3 300 300 285 25...

Page 50: ...tup Control in Cooling Operation Thermostat ON Outdoor unit actuator Electric symbol Pressure equalization control prior to startup Startup control RXTQ36 TAVJU RXTQ48 TAVJU RXTQ60 TAVJU STEP 1 STEP 2...

Page 51: ...ry 20 seconds from minimum 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 H...

Page 52: ...rate is computed from Tc Te and compressor loads Outdoor unit actuator Electric symbol Oil return preparation operation Oil return operation After oil return operation RXTQ36 TAVJU RXTQ48 TAVJU RXTQ6...

Page 53: ...ation after oil returning the compressor stops for 1 minute to reduce noise on changing of the four way valve Outdoor unit actuator Electric symbol Oil return preparation operation Oil return operatio...

Page 54: ...on to the operation after defrost the compressor stops for 1 minute to reduce noise on changing of the four way valve Outdoor unit actuator Electric symbol Defrost preparation operation Defrost operat...

Page 55: ...ual operation Step 2 RXTQ36 TAVJU RXTQ48 TAVJU RXTQ60 TAVJU Compressor M1C M1C M1C 124 Hz Minimum frequency Outdoor fan M1F M1F M1F M2F Fan control Fan control Four way valve Y1S Y1S Y1S OFF OFF Main...

Page 56: ...M1F M1F M1F M2F Ta 30 C 86 F STEP 4 Ta 30 C 86 F OFF Four way valve Y1S Y1S Y1S Keep former condition Main electronic expansion valve Y1E Y1E Y1E 0 pulse Subcooling electronic expansion valve Y3E 0 pu...

Page 57: ...si After 10 sec Pc 3 47 MPa 503 psi Pc 3 23 MPa 468 psi Pc 3 64 MPa 528 psi Current step maintained After 15 sec High pressure not limited High pressure limited Pc High pressure sensor detection value...

Page 58: ...igh pressure not limited High pressure limited Compressor upper limit frequency 1 step up from current compressor frequency Pc High pressure sensor detection value Compressor upper limit frequency 1 s...

Page 59: ...0 minutes the error code E4 is output Low pressure standby Low pressure limited Ts Teg 8 C 14 4 F Pe 0 06 MPa 8 7 psi Pe 0 09 MPa 13 1 psi OR After 10 seconds Pe 0 17 MPa 24 7 psi Pe 0 17 MPa 24 7 psi...

Page 60: ...After 20 seconds HTdi 130 C 266 F HTdi 120 C 248 F for 90 seconds or more OR HTdi 100 C 212 F Tp 110 C 230 F Discharge pipe temperature standby Discharge pipe protection control not limited Compressor...

Page 61: ...ompressor frequency Compressor upper limit frequency 1 step up from current compressor frequency Inverter current standby Inverter current 22 A continues for 3 minutes Current step maintained Without...

Page 62: ...F the inverter secondary current value is limited to a maximum of 9 5 A Not limited Existing DC power limit requirement OR OR Compressor stopped No DC power limit requirement Compressor upper limit Ma...

Page 63: ...enable this operation the additional setting of Constant Demand Setting is required Demand setting 1 Other protection control functions have precedence over the above operation 5 2 Heating Operation...

Page 64: ...tput Thermostat ON operation signal to outdoor unit Output 1 If any error occurs the relevant error code will be displayed according to the error code display of the remote controller 2 When the aux e...

Page 65: ...According to wind direction 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 con...

Page 66: ...yed 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 setting...

Page 67: ...e remote controller set temperature Regarding control target temperature When using the infrared floor sensor the temperature around people will be treated as the control target temperature for operat...

Page 68: ...cribed below 2 Description of symbols T Detected room temperature Remote controller set temperature Tro Detected room temperature at the start of dry operation Tr Determined by the room temperature de...

Page 69: ...side 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 temperature is hi...

Page 70: ...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 Differentia...

Page 71: ...for prevention of cold air Swing LL Horizontal Horizontal Horizontal Airflow direction set LL Horizontal Horizontal Horizontal Stop Swing OFF Horizontal Horizontal Totally closed Airflow direction set...

Page 72: ...fan is OFF before initiating the hot start OFF Hot start control Hot start in progress Normal control Normal control H L remote controller setting LL OFF Remote controller setting Po Horizontal Fan L...

Page 73: ...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 74: ...y After the thermostat turns OFF the drain pump continues to operate for another 5 minutes 1 If the float switch turns OFF again during the residual operation of the drain pump cooling operation also...

Page 75: ...rain pump turns ON simultaneously 1 If the float switch continues to turn ON and OFF 5 times consecutively it is judged as a drain system error and the error code AF is displayed on the remote control...

Page 76: ...s 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 ex...

Page 77: ...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 78: ...otal 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 standar...

Page 79: ...verting 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 unit Fan re...

Page 80: ...urned OFF when the prohibiting conditions are met Thermostat OFF Stop operation Thermostat step 1 Heat Pump Fan normal operation Continues for 5 minutes Continues for 5 minutes Continues for 5 minutes...

Page 81: ...conditions for this electrical heater are shown below Thermostat OFF Stop operation Thermostat step 1 H P Fan Normal operation Timer count 5 minutes Timer count 5 minutes Timer count 5 minutes Timer...

Page 82: ...ng conditions 2 Heating mode Thermostat step 1 ON Not during fan residual operation Electrical heater setting 01 Electrical heater setting 03 Elimination of Condition A Indoor unit error Stop due to e...

Page 83: ...3 Refer to 2 3 Setting Contents and Code No for Indoor Units P 83 Factory setting Remote control operation ON including thermostat OFF When the external input changes from ON to OFF Remote control ope...

Page 84: ...input ON is an input signal to the X11A terminal on the PCB A3P 3 To stop the compressor while the economizer is in operation to save energy 4 Remote control ON signal Contact output which shows the o...

Page 85: ...Remote Controller BRC1E73 80 2 2 Wireless Remote Controller 82 2 3 Setting Contents and Code No for Indoor Units 83 2 4 Outdoor Air Processing Unit Field Setting Remote Controller 96 2 5 Field Settin...

Page 86: ...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 the refrigera...

Page 87: ...d 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 Check the state...

Page 88: ...rging 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 later...

Page 89: ...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 unit Afte...

Page 90: ...he amount of refrigerant and recharge the unit H9 01 Defective outdoor air thermistor R1T Check the connection of the PCB or the actuator J3 16 Defective discharge pipe thermistor R2T Tripping Check t...

Page 91: ...ion or mismatched models R 410A R 407C RA Hydrobox etc Check if there are any other defective indoor units and verify if the indoor unit combination meets requirements 18 Defective indoor unit connect...

Page 92: ...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 during operatio...

Page 93: ...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 displayed 3 Highl...

Page 94: ...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 displaye...

Page 95: ...g 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 96: ...thermostat control is not permitted Remote controller thermostat control is permitted 5 7 Auxiliary electric heater ON OFF temperature Refer to page 88 6 11 21 1 Auxiliary electric heater ON temperat...

Page 97: ...ow flap Equipped Not equipped 22 4 Setting airflow position Draft prevention Standard Ceiling Soiling prevention 23 5 Setting of static pressure selection Standard High static pressure 24 6 External S...

Page 98: ...code No is set to 02 room temperature is controlled by the suction air thermistor When the Second code No is set to 03 room temperature is controlled by the remote controller thermistor Mode No First...

Page 99: ...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 Suction air...

Page 100: ...r Cleaning is not displayed when an Auto clean Panel is connected Mode No First Code No Second Code No Contents 10 20 6 01 Remote controller thermostat control is not permitted during group control 02...

Page 101: ...st Code No Symbol Second Code No 01 02 03 04 05 06 11 21 1 Ttson 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 2 Ttsoff 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 102: ...ith an infrared floor sensor Change the ratio between the suction air temperature and floor temperature used to calculate the temperature around people The temperature around people is calculated usin...

Page 103: ...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 capac...

Page 104: ...same as factory setting the units may start automatically after power failure reset or the main power supply turned ON again return to the same operation condition as that of before power failure For...

Page 105: ...se H 03 Normal increase S Mode No First Code No Second Code No Contents Ceiling Height 4 way Outlets 3 way Outlets 2 way Outlets 13 23 0 01 Standard N Lower than 2 7 m 8 29 32 ft Lower than 3 0 m 9 29...

Page 106: ...ap operation of down flow 23 Setting Airflow Position Make the following airflow direction setting according to the respective purpose Some indoor unit models are not equipped with draft prevention up...

Page 107: ...nection This is used when fresh air intake kit equipped with fan is connected The indoor unit fan carries out residual operation for 1 minute after the thermostat is stopped For the purpose of prevent...

Page 108: ...d for limited products Select two digit display if four digit display is not preferred 34 Key lock Pattern Settings For BRC1E73 only Setting of key lock pattern for the remote controller When the Seco...

Page 109: ...atible with a variety of controls and operations by limiting the functions of the operation remote controller Furthermore operations such as remote controller ON OFF can be limited in accordance with...

Page 110: ...y remote controller OFF control 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...

Page 111: ...ntrol Operation mode setting Unified operation individual operation by centralized remote controller or operation controlled by timer Unified OFF individual stop by centralized remote controller or ti...

Page 112: ...ting Caution Be sure to carry out capacity setting after changing the main PCB A1P to spare PCB for RXTQ48 60TAVJU only Attach the capacity setting adaptor corresponding to capacity class to connector...

Page 113: ...o check the program made in setting mode 2 H1P H3P H5P H7P H2P H4P H6P BS1 MODE BS2 SET BS4 TEST BS5 RESET BS3 RETURN Contents display Monitor mode Press the BS3 RETURN button Press the BS3 RETURN but...

Page 114: ...OOL HEAT selection MASTER Used to select COOL or HEAT by outdoor unit group with the master unit COOL HEAT selection SLAVE Used to select COOL or HEAT by outdoor unit group with the slave unit 2 Check...

Page 115: ...6P Demand H7P h h k h h h h Setting displaying item MODE H1P TEST H2P COOL HEAT select IND H3P MASTER H4P SLAVE H5P LOW NOISE H6P DEMAND H7P For selection by individual outdoor unit factory setting Fo...

Page 116: ...orm of inverter is output without wiring to the compressor it is convenient to probe whether the trouble comes from the compressor or PCB 29 Capacity precedence setting If the capacity control is requ...

Page 117: ...2 8 F k h h h h k h 3 C 37 4 F k h h h h h k 9 Tc setting k h h k h h k Target Tc 52 C 125 6 F k h h h k h h 46 C 114 8 F k h h h h k h Variable VRT k h h h h h k 10 Defrost changeover setting k h h k...

Page 118: ...t 7 00 k h h h h k h About 8 00 factory setting k h h h k h h 28 Power transistor check mode k h k k k h h OFF k h h h h h k ON k h h h h k h 29 Capacity precedence setting k h k k k h k OFF k h h h h...

Page 119: ...F k h h k h h k 10 C 50 F k h h k h k h 12 7 C 55 F k h h k h k k 15 5 C 60 F k h h k k h h 18 3 C 65 F k h h k k h k Auxiliary heater always not allowed k h h k k k h Auxiliary heater always allowed...

Page 120: ...efer to page 129 15 Contents of error 1 cycle before l h h k k k k 16 Contents of error 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 cycle before l...

Page 121: ...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 combination of four...

Page 122: ...7 Setting of end time of night time low noise operation Use the end time as a guide since it is estimated according to outdoor temperatures 4 If necessary while in setting mode 2 set the setting condi...

Page 123: ...While in setting mode 2 select the set item No 30 Setting of Demand 1 level and then set the setting condition to targeted mode Image of operation Set item Condition Content Demand Mode 1 The compress...

Page 124: ...link 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 H6P H7P...

Page 125: ...tion 2 Collect the refrigerant using a refrigerant recovery unit See the instruction attached to the refrigerant recovery unit for more detail 3 Press the MODE BS1 button once and return to setting mo...

Page 126: ...ronic expansion valve Unit stopping Press the TEST button for 5 seconds 10 seconds to 10 minutes LED display H1P H7P k ON h OFF l BLINK h h k h h h h h l h h h h k Pressure equalizing Step 1 20 second...

Page 127: ...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 h k 12 2 C...

Page 128: ...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 Fan Heater F...

Page 129: ...nits No Setting item display Setting condition display Setting item MODE H1P TEST H2P C H selection Low noise H6P Demand H7P IND H3P Master H4P Slave H5P Factory setting 57 Heat pump lockout temperatu...

Page 130: ...46 4 7 Swing Flap Motor Abnormality 147 4 8 Power Supply Voltage Abnormality 149 4 9 Electronic Expansion Valve Coil Abnormality Dust Clogging 150 4 10 Drain Level Above Limit 152 4 11 Capacity Determ...

Page 131: ...Units 195 4 42 Transmission Error between Remote Controller and Indoor Unit 197 4 43 Transmission Error between Main and Sub Remote Controllers 198 4 44 Transmission Error between Indoor and Outdoor...

Page 132: ...ions for 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 maintain...

Page 133: ...6 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 6...

Page 134: ...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 135: ...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 136: ...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 137: ...be 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...

Page 138: ...Current settings Clock calendar Language Service Settings Menu Test operation Maintenance Contract Field settings Min setpoints differential Group address Indoor unit AirNet address Outdoor unit AirN...

Page 139: ...creen 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 at the bottom of the scree...

Page 140: ...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 141: ...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 142: ...159 CE k Infrared presence floor sensor error 160 CJ k Remote controller thermistor abnormality 165 Outdoor Unit E1 l Outdoor main PCB abnormality 166 E3 l Activation of high pressure switch 167 E4 l...

Page 143: ...nd remote controller 200 UC k Address duplication of centralized controller 202 UE l Transmission error between centralized controller and indoor unit 203 UF l System not set 206 UH l System abnormali...

Page 144: ...normal discharge pipe temperature Abnormal Tdi F3 Abnormal heat exchanger temperature Refrigerant overcharge F6 Defective thermistor of outdoor air temperature Defective Ta sensor short H9 Defective d...

Page 145: ...h h l h k l h h l l k 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...

Page 146: ...Error Error 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 Refrigeran...

Page 147: ...2 l h k h h l h l k h h h h h l k k h h h h 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 h k l h...

Page 148: ...ation of external 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 inp...

Page 149: ...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 150: ...ecting or disconnecting 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 sho...

Page 151: ...S YES NO NO The drain pump works when the power supply is reset for the indoor unit The voltage of drain pump terminals 2 is 208 230 V within 5 minutes of resetting the power supply A Model 1 Float sw...

Page 152: ...rease 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 th...

Page 153: ...YES YES NO Are there any foreign matters around the fan YES NO Is the resistance between the pins less than the judgement criteria Replace the indoor unit main PCB A1P Disconnect the connector from t...

Page 154: ...r FXFQ09 30P X20A Relay connector FXFQ36 48P X20A FXUQ X20A Relay connector FXEQ X20A FXMQ07 12PB X8A FXAQ X20A Measuring point FG GND Vsp GND Vcc GND Vdc GND Criteria 1 M or more 100 k or more 100 or...

Page 155: ...ltage 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 the...

Page 156: ...signal of the fan motor Error from the current flow on the fan PCB when the fan motor starting operation Error Decision Conditions An overcurrent flows The RPM is less than a certain level for 6 seco...

Page 157: ...is a foreign 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...

Page 158: ...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 andWareunba...

Page 159: ...ation Supposed Causes Defective power supply for the indoor unit fan motor Clogged drain piping Actuation of the indoor unit safety device Defective contact in the fan wiring circuit Troubleshooting P...

Page 160: ...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 tur...

Page 161: ...S M2S M3S M4S FXEQ X36A M1S M2S M3S M4S FXHQ X6A M1S FXAQ X36A M1S Replace the power supply relay cable Replace the defective swing motor 2 Take the flap cam mechanism apart reassemble and turn ON aga...

Page 162: ...e 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 or di...

Page 163: ...for dust clogging via micro computer Error Decision Conditions Pin input for electronic expansion valve coil is abnormal when initializing micro computer Either of the following conditions is seen cau...

Page 164: ...coil Replace the relay cables When restarting the operation after shutting the power supply OFF does not work replace the indoor main unit PCB A1P NO Replace the electronic expansion valve main body P...

Page 165: ...t 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 indoor unit mai...

Page 166: ...he 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 not...

Page 167: ...sion conditions between the indoor unit main PCB A1P and fan PCB A2P are checked via micro computer Error Decision Conditions When normal transmission is not carried out for a certain duration Suppose...

Page 168: ...ircuit 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 connecting...

Page 169: ...stor Refer to page 231 Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Remove the thermistor from the indoor unit PCB Then insert the...

Page 170: ...y 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 PCB...

Page 171: ...for air inlet Defective indoor unit PCB Troubleshooting Refer to page 231 Is the optional remote sensor is installed Field setting 10 20 2 is set at C3 Connector is connected to X16A of the indoor un...

Page 172: ...check mode 2 To display the code the INSPECTION TEST Operation 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 173: ...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 flo...

Page 174: ...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 175: ...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 176: ...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 177: ...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 178: ...ntinuously Supposed Causes Defective room temperature thermistor in remote controller Defective remote controller PCB Troubleshooting Note 1 How to delete history of error codes Press the ON OFF butto...

Page 179: ...section between the indoor unit and the outdoor unit are not normal Supposed Causes Defective outdoor main PCB Disconnection of the inside outside relay wires Troubleshooting Caution Be sure to turn...

Page 180: ...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 181: ...A1P 1 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 pressur...

Page 182: ...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 183: ...pressure 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 pressur...

Page 184: ...ressure 0 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 connector...

Page 185: ...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 186: ...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 detec...

Page 187: ...s 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 smoothl...

Page 188: ...outdoor main PCB Disconnection of connectors for electronic expansion valve Troubleshooting YES Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may...

Page 189: ...the table below Determine the type according to the connector wire color and measure the resistance RXTQ36TAVJU RXTQ48 60TAVJU Measuring points 1 6 2 6 3 6 4 6 Judgment criteria White 1 Yellow 2 Oran...

Page 190: ...nnection of discharge pipe thermistor R2T Defective outdoor unit PCB Troubleshooting Refer to page 231 Be sure to turn off the power switch before connecting or disconnecting connectors or parts may b...

Page 191: ...Supposed Causes Refrigerant overcharge Disconnection of outdoor air thermistor heat exchanger deicer thermistor liquid pipe thermistor Defective outdoor air thermistor heat exchanger deicer thermisto...

Page 192: ...ecting 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 defecti...

Page 193: ...power switch before connecting or disconnecting connectors or parts may be damaged Replace the outdoor main PCB A1P Replace the high pressure sensor YES NO Replace the outdoor main PCB A1P NO Replace...

Page 194: ...er switch 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...

Page 195: ...it 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 circ...

Page 196: ...radiation from the power unit Blocked air suction port Stained radiation fin High outdoor air temperature Connect correctly Eliminate P4 error Keep operating Replace the outdoor main PCB A1P Be sure...

Page 197: ...PCB Troubleshooting Refer to page 225 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 198: ...to page 225 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 connecti...

Page 199: ...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 200: ...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 201: ...ower 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 Troubleshooti...

Page 202: ...ve radiation fin temperature thermistor Defective PCB Defective inverter compressor Defective fan motor Troubleshooting Refer to page 231 Caution Be sure to turn off the power switch before connecting...

Page 203: ...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 can...

Page 204: ...ger greater 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 o...

Page 205: ...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 invertor has abnor...

Page 206: ...tor 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...

Page 207: ...ecision Conditions Error is decided when the unit starts operation without check operation Supposed Causes Check operation is not executed Troubleshooting Replace the outdoor main PCB A1P Press BS4 on...

Page 208: ...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 Caution YES N...

Page 209: ...mal Fix the indoor outdoor or outdoor outdoor unit transmission wiring Press and hold the RESET button on the outdoor unit PCB for 5 seconds Replace the outdoor main PCB A1P YES NO NO Replace the main...

Page 210: ...unit PCB Defective remote controller PCB Defective transmission caused by noise Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may...

Page 211: ...eriod Supposed Causes Transmission error between main and sub remote controller Connection between sub remote controllers Defective remote controller PCB Troubleshooting Caution Be sure to turn off th...

Page 212: ...lectronic 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 Caution...

Page 213: ...ta 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 ab...

Page 214: ...NO Is 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 connectabl...

Page 215: ...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 216: ...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 217: ...the transmission 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 t...

Page 218: ...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 er...

Page 219: ...units Failure to execute check operation Defective indoor unit PCB Stop valve is not opened Troubleshooting Caution Is indoor outdoor and outdoor outdoor unit transmission wiring normal Is indoor outd...

Page 220: ...nits 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 aforementioned is detected S...

Page 221: ...s in the system YES NO YES Replace the indoor unit PCB Replace the outdoor main PCB A1P Press and hold the BS3 button on the outdoor unit PCB for 5 seconds Does an error occur even after 12 minutes el...

Page 222: ...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 223: ...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 224: ...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 225: ...hod 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 226: ...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 227: ...ule 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 an...

Page 228: ...nt CHECK 15 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 229: ...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 230: ...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 error occurred set t...

Page 231: ...The previously connected centralized controller is not responding Control range duplication There are multiple master centralized controllers There are other centralized controllers but the schedule...

Page 232: ...lers 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 contr...

Page 233: ...tralized 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 of schedule tim...

Page 234: ...etting 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 235: ...acity Dirty condenser Mixingofnon condensablegas Decreased airflow rate Decreased fan output Defective fan motor Defective main PCB Including capacity setting High airflow passage resistance Dirty fil...

Page 236: ...sistance Abnormal piping length Bent or crashed pipe Cloggingofforeignmaterials Stop valve closed Less circulation quantity of refrigerant Degradation in evaporating capacity Inadequate refrigerant qu...

Page 237: ...Defective subcooling electronic expansion valve control Superheat due to shaft damage Superheat due to defective compressor Defective indoor unit electronic expansion valve Defective control Defective...

Page 238: ...ester Measurement in the resistance value mode in the range of multiplying 1 k To use digital tester Measurement is executed in the diode check mode No Point of Measurement Judgement Criteria Remarks...

Page 239: ...High pressure 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 decr...

Page 240: ...comes to the 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...

Page 241: ...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 may have been cau...

Page 242: ...ressor L1 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...

Page 243: ...ve 260 seconds Defective startup of inverter compressor Compressor stops running immediately after it starts up Defective radiation inverter When transmissions between the microcomputers on the main P...

Page 244: ...e A Type J FXFQ P Type D FXZQ Type B FXUQ Type C FXEQ Type B FXDQ FXMQ PB Type J FXMQ M FXHQ FXAQ FXLQ FXNQ FXTQ Model Thermistor Type RXTQ36TAVJU R1T Outdoor air E R2T Discharge G R3T Suction 1 A R4T...

Page 245: ...1 31 41 31 5417 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...

Page 246: ...1517 10 7042 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 4...

Page 247: ...nt High pressure sensor Low pressure sensor CHECK 12 Main PCB A1P Micro computer A D input Measure DC voltage here Red Black White X17A black 4 3 2 1 High pressure sensor Measure DC voltage here Main...

Page 248: ...8 35 7 30 6 25 5 20 4 15 3 10 2 5 1 5 1 72 5 0 45 9 51 0 5 0 4 5 4 0 3 5 3 0 2 5 2 0 1 5 1 0 0 5 0 0 5 0 5 0 0 5 1 1 5 2 2 5 3 3 5 4 VDC kg cm2 psi MPa PH PL PH MPa VH 0 5 PL MPa VL 0 5 PH High press...

Page 249: ...eas 2 Procedure for checking indoor outdoor unit transmission wiring for broken wires for checking the indoor outdoor unit transmission wiring of Outdoor Unit C for broken wires Turn OFF the power sup...

Page 250: ...e for combined 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 th...

Page 251: ...connector X106A X107A on the PCB to measure the resistance value Judgment criteria resistance value between each phase is within 20 CHECK 15 1 2 3 4 Pattern 1 00 4 15 Master Slave 5 00 8 15 Master Sl...

Page 252: ...SiUS331604E 239 Appendix Part 7 Appendix 1 Wiring Diagrams 240 1 1 Outdoor Unit 240 1 2 Indoor Unit 243 1 3 Air Treatment Equipment 255...

Page 253: ...SiUS331604E Wiring Diagrams Appendix 240 1 Wiring Diagrams 1 1 Outdoor Unit RXTQ36TAVJU 3D100495A...

Page 254: ...Wiring Diagrams SiUS331604E 241 Appendix RXTQ48TAVJU 3D100496A...

Page 255: ...SiUS331604E Wiring Diagrams Appendix 242 RXTQ60TAVJU 3D100497A...

Page 256: ...RE NOISE FILTER POWER SUPPLY CIRCUIT A1P A2P CONNECTOR FOR OPTIONAL PARTS CONNECTOR SELF CLEAN PANEL CONNECTOR ADAPTOR FOR WIRING CONNECTOR POWER SUPPLY FOR ADAPTOR CONNECTOR SELF CLEAN PANEL M4S M1S...

Page 257: ...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 258: ...TOR 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 CIRCUI...

Page 259: ...ENTRAL 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 SYMBOLS...

Page 260: ...Wiring Diagrams SiUS331604E 247 Appendix FXEQ07 09 12 15 18 24PVJU C 3D098557...

Page 261: ...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 262: ...1F X28A X33A X35A X38A THERMISTOR GAS THERMISTOR DISCHARGE AIR THERMISTOR NTC CURRENT LIMITING FLOAT SWITCH DIODE BRIDGE A1P A2P POWER MODULE TERMINAL BLOCK POWER SUPPLY TERMINAL BLOCK CONTROL ELECTRO...

Page 263: ...2 FIELD WIRING 3 IN CASE USING CENTRAL REMOTE CONTROLLER CONNECT IT TO THE UNIT IN ACCORDANCE WITH THE ATTACHED INSTALLATION MANUAL 4 WHEN CONNECTING THE INPUT WIRES FROM OUTSIDE FORCED OFF OR ON OFF...

Page 264: ...ATION CAN BE SELECTED BY REMOTE CONTROLLER IN DETAILS REFER TO THE INSTALLATION MANUAL ATTACHED THE UNIT 6 SYMBOLS SHOW AS FOLLOWS BLU BLUE BLK BLACK ORG ORANGE PNK PINK RED RED WHT WHITE YLW YELLOW 7...

Page 265: ...TCH WIRELESS ADDRESS SET CONNECTOR FOR OPTIONAL PARTS CONNECTOR FLOAT SWITCH CONNECTOR WIRELESS REMOTE CONTROLLER CONNECTOR GROUP CONTROL ADAPTOR CONNECTOR ADAPTOR FOR MULTI TENANT POWER SUPPLY 1 208...

Page 266: ...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 267: ...SiUS331604E Wiring Diagrams Appendix 254 FXTQ12 18 24 30 36 42 48 54PAVJU 3D065036G...

Page 268: ...Wiring Diagrams SiUS331604E 255 Appendix 1 3 Air Treatment Equipment 1 3 1 Outdoor Air Processing Unit FXMQ48 72MFVJU 3D065426D...

Page 269: ...SiUS331604E Wiring Diagrams Appendix 256 1 3 2 Energy Recovery Ventilator VAM Series VAM300 470 600GVJU 3D073269C...

Page 270: ...Wiring Diagrams SiUS331604E 257 Appendix VAM1200GVJU 3D073270C...

Page 271: ...Revision History Month Year Version Revised contents 06 2016 SiUS331604E First edition...

Page 272: ...e of unauthorised 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 careful...

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