Daikin FTXR-T Series Page 75 Service Manual Download

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SiUS041829E

Troubleshooting

Part 6 Service Diagnosis

4.2 Indoor Unit PCB Abnormality

Error Code

Method of Error
Detection

The system checks if the circuit works properly within the microcomputer of the indoor unit.

Error Decision
Conditions

The system cannot set the internal settings.

Supposed
Causes



Wrong models interconnected



Defective indoor unit PCB



Disconnection of connector



Reduction of power supply voltage

Summary of Contents for FTXR-T Series

Page 1: ...Applied Models Inverter Pair Heat Pump Inverter Pair Wall Mounted Type FTXR T Series Service Manual SiUS041829E...

Page 2: ...VJU9 20 2 2 RX18RMVJU9 21 Part 4 Functions and Control 22 1 Main Functions 23 1 1 Temperature Control 23 1 2 Frequency Principle 23 1 3 Airflow Direction Control 25 1 4 Fan Speed Control for Indoor Un...

Page 3: ...t Control 73 4 4 Indoor Fan Motor DC Motor or Related Abnormality 74 4 5 Thermistor or Related Abnormality 77 4 6 Front Panel Open Close Fault 78 4 7 Low voltage Detection or Over voltage Detection 79...

Page 4: ...ge Pressure Check 119 5 11 Outdoor Fan System Check 119 5 12 Main Circuit Short Check 120 5 13 Power Module Check 122 Part 7 Trial Operation and Field Settings 124 1 Pump Down Operation 125 2 Forced C...

Page 5: ...S041829E Introduction 1 1 Safety Cautions 2 1 1 Warnings and Cautions Regarding Safety of Workers 2 1 2 Warnings and Cautions Regarding Safety of Users 4 2 Icons Used 7 3 Revision History 8 Introducti...

Page 6: ...ruction 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...

Page 7: ...nt The use of materials for R 22 refrigerant models may cause a serious accident such as a damage of refrigerant cycle or equipment failure Do not mix air or gas other than the specified refrigerant R...

Page 8: ...he same power outlet with other electrical appliances since it may cause an electrical shock excessive heat generation or fire Be sure to use an exclusive power circuit for the equipment and follow th...

Page 9: ...to make sure that the power cable plug is not dirty or loose then insert the plug into a power outlet securely If the plug is dusty or has a loose connection it may cause an electrical shock or fire...

Page 10: ...nce is 1 M or higher Faulty insulation may cause an electrical shock Be sure to check the drainage of the indoor unit after the repair Faulty drainage may cause water to enter the room and wet the fur...

Page 11: ...tion is used when there is danger that the reader through incorrect manipulation may damage equipment lose data get an unexpected result or have to restart part of a procedure Note Note Note provides...

Page 12: ...Revision History SiUS041829E 8 Introduction 3 Revision History Month Year Version Revised contents 01 2019 SiUS041829E First edition...

Page 13: ...SiUS041829E Part 1 General Information 9 1 Applicable Models 10 1 1 Heat Pump 10 2 Functions 11 Part 1 General Information...

Page 14: ...odels SiUS041829E 10 Part 1 General Information 1 Applicable Models 1 1 Heat Pump Indoor Unit Outdoor Unit FTXR09TVJUW FTXR09TVJUS FTXR12TVJUW FTXR12TVJUS FTXR18TVJUW FTXR18TVJUS RX09RMVJU9 RX12RMVJU9...

Page 15: ...Eye auto energy saving 2 area Intelligent Eye comfort ECONO mode Inverter POWERFUL operation Indoor unit quiet operation OUTDOOR UNIT QUIET operation Indoor unit ON OFF switch Multi colored indicator...

Page 16: ...over R C temperature display factory setting F Remote control adaptor normal open pulse contact Option Remote control adaptor normal open contact Option DIII NET compatible Option Wireless LAN connect...

Page 17: ...SiUS041829E Part 2 Specifications 13 1 Specifications 14 Part 2 Specifications...

Page 18: ...16 36 16 Sound Pressure Level H M L SL dB A 38 32 25 19 41 34 28 19 38 32 25 19 41 34 28 19 Outdoor Unit RX09RMVJU9 RX09RMVJU9 Casing Color Ivory White Ivory White Compressor Type Hermetically Sealed...

Page 19: ...16 Sound Pressure Level H M L SL dB A 45 34 26 20 45 37 29 20 45 34 26 20 45 37 29 20 Outdoor Unit RX12RMVJU9 RX12RMVJU9 Casing Color Ivory White Ivory White Compressor Type Hermetically Sealed Swing...

Page 20: ...Pressure Level H M L SL dB A 46 40 35 30 47 41 35 30 46 40 35 30 47 41 35 30 Outdoor Unit RX18RMVJU9 RX18RMVJU9 Casing Color Ivory White Ivory White Compressor Type Hermetically Sealed Swing Type Herm...

Page 21: ...Part 3 Printed Circuit Board Connector Wiring Diagram 17 1 Indoor Unit 18 1 1 FTXR09 12 18TVJUW S 18 2 Outdoor Unit 20 2 1 RX09 12RMVJU9 20 2 2 RX18RMVJU9 21 Part 3 Printed Circuit Board Connector Wir...

Page 22: ...swing motors 5 S42 Connector for reduction motor front panel mechanism and limit switch 6 S46 Connector for display signal receiver PCB A2P 7 S200 Connector for DC fan motor 8 H1 H2 H3 Connector for t...

Page 23: ...them INTELLIGENT EYE Sensor PCB A3P 1 S51 Connector for control PCB A1P 2 S52 Connector for room temperature thermistor 3 S1W Indoor unit ON OFF switch Forced cooling operation ON OFF switch Refer to...

Page 24: ...0 Connector for overload protector 4 S71 Connector for DC fan motor 5 S80 Connector for four way valve coil 6 S90 Connector for thermistors outdoor temperature outdoor heat exchanger discharge pipe 7...

Page 25: ...load protector 3 S70 Connector for DC fan motor 4 S80 Connector for four way valve coil 5 S90 Connector for thermistors outdoor temperature outdoor heat exchanger discharge pipe 6 HL1 HN1 S Connector...

Page 26: ...ation 34 1 12 Multi Monitor Lamp TIMER Lamp 35 1 13 Clock Setting 36 1 14 WEEKLY TIMER Operation 37 1 15 Other Functions 43 2 Thermistor Functions 44 3 Control Specification 45 3 1 Mode Hierarchy 45 3...

Page 27: ...om temperature thermistor 1 2 Frequency Principle Control Parameters The frequency of the compressor is controlled by the following 2 parameters The load condition of the operating indoor unit The dif...

Page 28: ...ent is integrated to keep the room temperature constant Energy saving heating and cooling Once the set temperature is reached the energy saving operation enables to maintain the room temperature at lo...

Page 29: ...rtical and horizontal swing motions enables uniform air conditioning of the entire room When the horizontal swing and vertical swing are both set to automatic operation the airflow becomes 3 D airflow...

Page 30: ...he upper limit is at M tap in 30 minutes from the operation start Heating In heating operation the fan speed is regulated according to the indoor heat exchanger temperature and the difference between...

Page 31: ...unit operates in an appropriate capacity for each zone to maintain the temperature and humidity at a comfortable level Thermostat turns on also when the room temperature is in the zone B for 10 minut...

Page 32: ...s the target temperature Tt Ts 18 30 C 64 4 86 F 2 The target temperature Tt is calculated as Tt Ts C where C is the correction value C 0 C 0 F 3 Thermostat ON OFF point and operation mode switching p...

Page 33: ...tem resumes from defrost control in any zones except A The operation turns on in any zones except A The monitoring time has passed while the temperature difference is in the zone B Cooling 10 minutes...

Page 34: ...arget temperature slightly in the case of cooling or lowers the target temperature slightly in the case of heating This prevents excessive cooling in summer and excessive heating in winter to ensure c...

Page 35: ...utton on the wireless remote controller Details When this function is activated the maximum capacity also decreases The remote controller can send the ECONO command when the unit is in cooling heating...

Page 36: ...on sensor detects 10 times or more of the wave output in one second in total and the High signal continues for 3 sec the microcomputer judges humans are in the room as the human detection signal is ON...

Page 37: ...th areas A and B Shift the airflow direction to area B left side 2 Human detection signal ON in area A Shift the airflow direction to area B left side 3 Human detection signal ON in area B Shift the a...

Page 38: ...cooling POWERFUL operation cannot be used together with ECONO COMFORT AIRFLOW or OUTDOOR UNIT QUIET operation Operation mode Fan speed Target temperature COOL H tap A rpm 18 C 64 4 F DRY Dry rotating...

Page 39: ...can be monitored even in automatic operation in accordance with the actual operation mode The lamp color changes according to the operation AUTO Red Blue DRY Green COOL Blue HEAT Red FAN White TIMER...

Page 40: ...utton to set the clock to the current day of the week 3 Press Clock button blinks 4 Press Select or Select button to set the clock to the present time Holding down Select or Select button rapidly incr...

Page 41: ...or the weekend Make timer settings for programs Tuesday to Friday Saturday Sunday Program 1 Program 2 Program 3 Program 4 Use the copy mode to make settings for Tuesday to Friday because these setting...

Page 42: ...1 to 4 settings can be made per day Pressing changes the reservation number and the day of the week 3 Press The day of the week and reservation number will be set and blink 4 Press to select the desir...

Page 43: ...e from STEP 4 is displayed on the LCD and WEEKLY TIMER operation is activated The TIMER lamp periodically lights orange The multi monitor lamp will not light orange if all the reservation settings are...

Page 44: ...The whole reservation of the selected day of the week will be copied Be sure to direct the remote controller toward the indoor unit and check for a receiving tone and blinking of the multi monitor lam...

Page 45: ...ng mode Proceed to Setting mode STEP 4 is displayed on the LCD and WEEKLY TIMER operation is activated The TIMER lamp periodically lights orange The multi monitor lamp will not light orange if all the...

Page 46: ...to select the day of the week and the reservation number to be deleted and or blink Pressing changes the ON OFF TIMER mode in sequence Selecting blank will cancel any reservation you may have This fun...

Page 47: ...unit Press ON OFF switch once to start operation Press once again to stop it ON OFF switch is useful when the remote controller is missing or the battery has run out The operation mode refers to the f...

Page 48: ...istor The outdoor temperature thermistor detects the outdoor air temperature and is used for refrigerant shortage detection input current control outdoor fan control liquid compression protection func...

Page 49: ...tor test mode for installation and servicing Details Unless specified otherwise dry operation command is regarded as cooling operation Air conditioner control mode Forced operation mode Forced cooling...

Page 50: ...ower limits of the following functions Four way valve operation compensation draft prevention pressure difference upkeep 4 Determine prohibited frequency There is a certain prohibited frequency such a...

Page 51: ...4 Upper and lower limit of frequency by PI control The frequency upper and lower limits are set according to the command of the indoor unit When the indoor or outdoor unit quiet operation command com...

Page 52: ...n temperature 85 C 185 F OFF condition Discharge pipe temperature 2 C 35 6 F Radiation fin temperature 90 C 194 F Control B ON condition Discharge pipe temperature 10 C 50 0 F Radiation fin temperatur...

Page 53: ...lve switching The lower limit of frequency keeps A Hz for B seconds for any of the conditions above When the outdoor temperature is above C in heating the frequency decreases depending on the outdoor...

Page 54: ...ising further Details Zone Control Stop zone When the temperature reaches the stop zone the compressor stops Dropping zone The upper limit of frequency decreases Keep zone The upper limit of frequency...

Page 55: ...ne for 2 5 seconds the compressor is stopped Dropping zone The upper limit of the compressor frequency is defined as operation frequency 2 Hz After this the output frequency is lowered by 2 Hz every s...

Page 56: ...pressure The operating frequency limitation is judged with the indoor heat exchanger temperature Reset zone Up zone Keep zone Dropping zone Stop zone 13 C 55 4 F 6 5 C 44 F 5 5 C 41 9 F 0 C 32 F 6 C 4...

Page 57: ...tdoor fan is controlled as well as normal operation 5 Fan speed control during forced operation The outdoor fan is controlled as well as normal operation during forced operation 6 Fan speed control du...

Page 58: ...n the duration of the previous defrost control of accumulated time have passed since the start of the operation or ending the previous defrosting Conditions for Canceling Defrost The judgment is made...

Page 59: ...scharge pipe thermistor is disconnected Feedback Control Target discharge pipe temperature control Details The followings are the examples of electronic expansion valve control which function in each...

Page 60: ...defrosting 3 11 4 Starting Operation Control The electronic expansion valve opening is controlled when the operation starts thus preventing superheating or liquid compression 3 11 5 Control when the F...

Page 61: ...ssor runs for 60 minutes without any error the error counter is reset Details Determining thermistor disconnection When the starting control finishes the detection timer for disconnection of the disch...

Page 62: ...harge pipe temperature The time depends on the opening of the electronic expansion valve 3 12 Malfunctions 3 12 1 Sensor Malfunction Detection Sensor malfunction can be detected in the following therm...

Page 63: ...SiUS041829E Part 5 Remote Controller 59 1 Applicable Remote Controller 60 2 ARC466A36 61 Part 5 Remote Controller...

Page 64: ...pplicable model for details You can download operation manuals from Daikin Business Portal Daikin Business Portal Document Search Item Category Installation Operation Manual URL https global1d daikin...

Page 65: ...f there is anything to block signals between the unit and the remote controller such as a curtain the unit will not operate The maximum distance for communication is about 19 11 16 ft 6 m Make sure th...

Page 66: ...NIT QUIET operation is not available in FAN and DRY operation OUTDOOR UNIT QUIET operation and ECONO operation cannot be used at the same time with POWERFUL operation Priority is given to the function...

Page 67: ...4 10 Outdoor Unit PCB Abnormality 84 4 11 OL Activation Compressor Overload 85 4 12 Compressor Lock 88 4 13 DC Fan Lock 90 4 14 Input Overcurrent Detection 91 4 15 Four Way Valve Abnormality 93 4 16...

Page 68: ...System Check 115 5 7 Inverter Analyzer Check 116 5 8 Rotation Pulse Check on the Outdoor Unit PCB 117 5 9 Installation Condition Check 118 5 10 Discharge Pressure Check 119 5 11 Outdoor Fan System Ch...

Page 69: ...on lamp OFF Check the outdoor temperature Heating cooling operations are not available when the outdoor temperature is out of the operation limit Check the reference page for the operation limit 139 D...

Page 70: ...ion error occurs between the indoor and outdoor units In either case conduct the diagnostic procedure described in the following pages Service Monitor The indoor unit has a green LED LED A on the cont...

Page 71: ...rresponding codes 2 To return to the normal mode hold Timer Cancel button down for 5 seconds When the remote controller is left untouched for 60 seconds it also returns to the normal mode 3 Not all th...

Page 72: ...ress Mode button to enter the service check mode The left side number blinks 4 Press Temp or Temp button and change the number until you hear the two consecutive beeps or the long beep 5 Diagnose by t...

Page 73: ...sound Beep The left side number does not correspond with the error code Two consecutive beeps The left side number corresponds with the error code but the right side number does not Long beep Both th...

Page 74: ...temperature thermistor or related abnormality 77 Outdoor Unit E1 Outdoor unit PCB abnormality 84 E5 OL activation compressor overload 85 E6 Compressor lock 88 E7 DC fan lock 90 E8 Input overcurrent d...

Page 75: ...f Error Detection The system checks if the circuit works properly within the microcomputer of the indoor unit Error Decision Conditions The system cannot set the internal settings Supposed Causes Wron...

Page 76: ...ination of the indoor and outdoor unit matched YES NO NO YES NO NO YES R23407 Caution To secure the connection disconnect the connectors once and then reconnect YES NO YES NO YES NO YES Match the comp...

Page 77: ...cut control During heating operation the indoor heat exchanger temperature is above 62 5 C 144 5 F Supposed Causes Short circuited air Clogged air filter of the indoor unit Dust accumulation on the i...

Page 78: ...ormal fan motor operation Error Decision Conditions The detected rotation speed does not reach the demanded rotation speed of the target tap and is less than 50 of the maximum fan motor rotation speed...

Page 79: ...e the indoor fan motor Replace the indoor unit PCB control PCB Replace the indoor unit PCB control PCB Does the fan rotate smoothly Does the fan rotate Motor power supply voltage 310 340 VDC Turn off...

Page 80: ...Troubleshooting SiUS041829E 76 Part 6 Service Diagnosis Note Reference The rotation pulse is the feedback signal from the indoor fan motor Check No 02 Refer to P 113...

Page 81: ...nection of connector Defective thermistor s Defective indoor unit PCB Troubleshooting C4 Indoor heat exchanger thermistor C9 Room temperature thermistor Check No 01 Refer to P 112 When replacing the d...

Page 82: ...itialization finishes Operate the unit by the indoor unit ON OFF switch YES YES YES YES NO NO NO NO Replace the harness and reduction motor Replace the assembly of the front panel mechanism Check the...

Page 83: ...on the model The compressor stops if the error occurs and restarts automatically after 3 minute standby Over voltage detection An over voltage signal is fed from the over voltage detection circuit to...

Page 84: ...YES YES YES Reconnect the harness Check the power supply voltage Check the connection of the compressor harness Precaution before turning on the power again Make sure the power has been off for at le...

Page 85: ...normal Error Decision Conditions The data sent from the outdoor unit cannot be received normally or the content of the data is abnormal Supposed Causes Power supply voltage out of specification Reduct...

Page 86: ...wires between the indoor unit and outdoor unit Is LED A blinking Properly insulated Is there any disturbance Is there any wiring error Check the indoor unit outdoor unit connection wires Check the LED...

Page 87: ...terconnected Wrong wiring of connecting wires Wrong indoor unit PCB or outdoor unit PCB mounted Defective indoor unit PCB Defective outdoor unit PCB Troubleshooting R20435 Caution NO YES YES NO Match...

Page 88: ...mentary drop of voltage Momentary power failure Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Continuously ON or OF...

Page 89: ...down Reset condition Continuous run for about 60 minutes without any other error Supposed Causes Disconnection of discharge pipe thermistor Defective discharge pipe thermistor Disconnection of connec...

Page 90: ...place the electronic expansion valve or the coil Refer to the refrigerant line check procedure Replace the outdoor unit PCB main PCB Replace the four way valve or the coil Replace the outdoor unit PCB...

Page 91: ...SiUS041829E Troubleshooting Part 6 Service Diagnosis 87 Reference Note Check No 14 Refer to P 115 When replacing the defective thermistor s replace the thermistor as ASSY...

Page 92: ...k is detected by the current waveform generated when applying high frequency voltage to the motor Error Decision Conditions If the error repeats the system is shut down Reset condition Continuous run...

Page 93: ...rt the system Precaution before turning on the power again Make sure the power has been off for at least 30 seconds Correct the power supply or replace the outdoor unit PCB main PCB Open the stop valv...

Page 94: ...fan motor Foreign matter stuck in the fan Defective fan motor Defective outdoor unit PCB Troubleshooting Check No 16 Refer to P 117 R20416 Caution YES YES NO YES NO NO YES NO Turn on the power Rotate...

Page 95: ...ith the compressor running Error Decision Conditions The current exceeds about 12 0 12 5 A depending on the model for 2 5 seconds with the compressor running The upper limit of the current decreases w...

Page 96: ...the wires have been disconnected and reconnected for part replacement check the R21863 NO YES YES NO Start operation and measure the input current Check No 18 Check the discharge pressure Check No 17...

Page 97: ...g condition continues over 10 minutes after operating for 5 minutes Cooling Dry A B 5 C A B 9 F Heating B A 5 C B A 9 F A Room thermistor temperature B Indoor heat exchanger temperature If the error r...

Page 98: ...check procedure Replace the four way valve defective or dust clogged Reconnect the thermistor s Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may...

Page 99: ...tive electronic expansion valve or coil Refrigerant shortage Defective four way valve Water mixed in refrigerant Defective stop valve Defective outdoor unit PCB Troubleshooting Check No 01 Refer to P...

Page 100: ...y the outdoor heat exchanger thermistor exceeds the limit Error Decision Conditions The temperature sensed by the outdoor heat exchanger thermistor rises above 57 5 60 C 135 5 140 F depending on the m...

Page 101: ...lve Replace the outdoor heat exchanger thermistor Replace the outdoor unit PCB main PCB Replace the electronic expansion valve or the coil Replace the outdoor unit PCB main PCB Change the installation...

Page 102: ...air intrusion Defective discharge pipe thermistor Troubleshooting Check No 01 Refer to P 112 When replacing the defective thermistor s replace the thermistor as ASSY YES R23655 NO OK NG Caution Repla...

Page 103: ...tage before compressor start up is below 50 V Supposed Causes Broken or disconnected harness Defective outdoor unit PCB Troubleshooting Caution Be sure to turn off the power switch before connecting o...

Page 104: ...ough the position detection circuit Error Decision Conditions If the error repeats the system is shut down Reset condition Continuous run for about 11 minutes without any other error Supposed Causes P...

Page 105: ...n off the power Disconnect the harnesses U V and W Turn on the power Check the electrolytic capacitor voltage Electrical components or compressor harnesses connected as specified Replace the outdoor u...

Page 106: ...Troubleshooting SiUS041829E 102 Part 6 Service Diagnosis Reference Reference Reference R6000565 Check No 15 Refer to P 116 Check No 18 Refer to P 119 Check No 20 Refer to P 120...

Page 107: ...compressor running frequency and the input current Error Decision Conditions If the error repeats the system is shut down Reset condition Continuous run for about 60 minutes without any other error S...

Page 108: ...0 04 V or less with the power on J3 error is judged if the discharge pipe temperature is lower than the heat exchanger temperature Supposed Causes Disconnection of the connector for the thermistor De...

Page 109: ...hanger temperature Replace the defective thermistor s of the following thermistors Outdoor temperature thermistor Discharge pipe thermistor Outdoor heat exchanger thermistor Cooling Outdoor heat excha...

Page 110: ...tdoor unit PCB Troubleshooting Check No 17 Refer to P 118 Check No 19 Refer to P 119 A B C C F C F C F 09 12 class 82 179 6 65 149 70 158 18 class 90 194 64 147 2 81 177 8 Caution WARNING To cool the...

Page 111: ...sor on is above A The error is cleared when the radiation fin temperature drops below B If the error repeats the system is shut down Reset condition Continuous run for about 60 minutes without any oth...

Page 112: ...or disconnecting connectors or parts may be damaged R23953 NO NG OK NO YES Check the radiation fin temperature NO YES YES Above A Check No 19 Check the outdoor fan Error displayed again Has the PCB b...

Page 113: ...g A rotation speed error occurs while the compressor is running An output overcurrent signal is fed from the output overcurrent detection circuit to the microcomputer If the error repeats the system i...

Page 114: ...ge Monitor the power supply voltage discharge and suction pressures and other factors for a long term Possible causes Momentary drop of power supply voltage Compressor overload Short circuit Check the...

Page 115: ...US041829E Troubleshooting Part 6 Service Diagnosis 111 Reference Reference Reference Reference Check No 15 Refer to P 116 Check No 17 Refer to P 118 Check No 18 Refer to P 119 Check No 22 Refer to P 1...

Page 116: ...sistance between the pins using multimeter To check the thermistor soldered on a PCB disconnect the PCB from other PCB parts and measure the resistance between the both ends of soldered thermistor R60...

Page 117: ...nput pins 4 1 5 3 Power Supply Waveform Check Check No 11 Measure the power supply waveform between No 1 and No 2 on the terminal strip and check the waveform disturbance Check if the power supply wav...

Page 118: ...es not generate a latching sound in step 2 disconnect the connector and check the continuity using a multimeter 4 Check the continuity between the pins 5 1 5 2 5 3 5 4 between the pins 6 1 6 2 6 3 and...

Page 119: ...valve coil Cooling Dry Defrost Not energized Heating energized Replace the outdoor unit PCB main PCB Replace the four way valve coil Replace the four way valve Four way valve coil resistance at 1000 2...

Page 120: ...capacitor drops to 10 VDC or below before carrying out the service work Reference If the terminals of the compressor are not FASTON terminals difficult to remove the wire on the terminals it is possi...

Page 121: ...als may be burned due to loosening 5 8 Rotation Pulse Check on the Outdoor Unit PCB Check No 16 Make sure that the voltage is within 320 VDC 1 Set operation off and power off Disconnect the connector...

Page 122: ...tacles or winds blowing in the opposite direction R19394 NG YES YES NO Is the discharged air short circuited NO NO YES Is the outdoor heat exchanger very dirty Change the installation location or dire...

Page 123: ...connection pipe deformed Is the stop valve open High Replace the compressor Open the stop valve Replace the pipe installed at the site Clean the dirty air filter or indoor outdoor heat exchanger Repla...

Page 124: ...efore checking Measure the resistance between the pins of the DB1 referring to the table below If the resistance is or less than 1 k short circuit occurs on the main circuit 09 12 class Positive termi...

Page 125: ...SiUS041829E Check Part 6 Service Diagnosis 121 18 class R25105 1 2 3 4 Multimeter...

Page 126: ...n on the connector Follow the procedure below to measure resistance between the terminals of the power module and the terminals of the compressor with a multimeter Evaluate the measurement results ref...

Page 127: ...SiUS041829E Check Part 6 Service Diagnosis 123 18 class R20704 W V U DC_P1 DC_N1...

Page 128: ...3 Trial Operation 127 4 Field Settings 129 4 1 Temperature Display Switch 129 4 2 When 2 Units are Installed in 1 Room 129 4 3 Jumper and Switch Settings 130 4 4 Facility Setting cooling at low outdoo...

Page 129: ...he valve caps from the liquid stop valve and the gas stop valve 2 Carry out forced cooling operation 3 After 5 10 minutes close the liquid stop valve with a hexagonal wrench 4 After 2 3 minutes close...

Page 130: ...Press indoor unit ON OFF switch for at least 5 seconds The operation will start Forced cooling operation will stop automatically after about 15 minutes To stop the operation press indoor unit ON OFF...

Page 131: ...perating the air conditioner in cooling operation in winter or heating operation in summer set it to the trial operation mode using the following method Procedure ARC466 Series 1 Press On Off button t...

Page 132: ...unit s air inlet or air outlet Incomplete cooling heating function Stop valves are opened Incomplete cooling heating function Indoor unit properly receives remote controller commands No operation wil...

Page 133: ...in 1 room 1 of the 2 indoor units and the corresponding wireless remote controller can be set for different address Both the indoor unit PCB and the wireless remote controller need alteration Indoor U...

Page 134: ...nic circuit Improper operation may occur if you cut any of them 4 3 Jumper and Switch Settings For the location of the jumper refer to 18 page R25252 Jumper on indoor unit PCB Function When connected...

Page 135: ...plate of the outdoor unit 09 12 class 3 screws 18 class 6 screws 2 Remove the front plate 09 12 class 4 screws 18 class 8 screws 3 Cut the jumper J6 of the PCB inside For the location of the jumper r...

Page 136: ...de bridge Details 1 Wipe off the old silicone grease completely 2 Apply the silicone grease evenly See the illustrations below for examples of application 3 Tighten the screws of the power transistor...

Page 137: ...SiUS041829E Part 8 Appendix 133 1 Piping Diagrams 134 1 1 Indoor Unit 134 1 2 Outdoor Unit 135 2 Wiring Diagrams 136 2 1 Indoor Unit 136 3 Outdoor Unit 137 4 Operation Limit 139 Part 8 Appendix...

Page 138: ...8 CuT Heat exchanger thermistor Heat exchanger Cross flow fan Fan motor Field piping 3 8 CuT Field piping 1 4 CuT Refrigerant flow Cooling Heating 4D101008A Indoor unit 1 4 CuT 3 8 CuT Heat exchanger...

Page 139: ...SiUS041829E Piping Diagrams Part 8 Appendix 135 1 2 Outdoor Unit RX09 12RMVJU9 RX18RMVJU9 3D092207C 3D092220C...

Page 140: ...BLK BLK BLK BLK BLK BLK BLK BLK BLK WHT RED BLU BRN ORG WHT RED GRN YLW GRN YLW RED ORG YLW BLU OUTDOOR INDOOR Field wiring NOTE When the main power is turned off and then back on again operation will...

Page 141: ...SiUS041829E Outdoor Unit Part 8 Appendix 137 Note s 3 Outdoor Unit RX09 12RMVJU9 PCB1 Main PCB Refer to page 20 for Printed Circuit Board Connector Wiring Diagram 3D112531A...

Page 142: ...Outdoor Unit SiUS041829E 138 Part 8 Appendix Note s RX18RMVJU9 PCB Main PCB Refer to page 21 for Printed Circuit Board Connector Wiring Diagram 3D105962B...

Page 143: ...SiUS041829E Operation Limit Part 8 Appendix 139 4 Operation Limit RX09 12 18RMVJU9 3D092209E...

Page 144: ...cal legislation z z Ask a qualified installer or contractor to install this product Do not try to install the product yourself Improper installation can result in water or refrigerant leakage electric...

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