AirStage ARXB07LALH Service Manual Download Page 48

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03-04

3-2-2 Auto Changeover

Operation flow chart

START

Room temp.

Ts+2°C ?

COOLING OPERATION

HEATING OPERATION

YES

AUTO CHANGEOVER operation

Setting temperature

Ts- 2°C ?

[Method]

1. Switch operation mode management to "Management by indoor unit" by outdoor unit DIP-SW.

2. Set the master indoor unit by wired remote controller.

3. Judge cooling/heating by the difference between the master indoor unit's setting temperature and

the room temperature.

Thermostat remains

in OFF state for 6 minutes or

longer?

System stops

or operation command other than

auto changeover operation?

Thermostat remains

in OFF state for 6 minutes or

longer?

System stops

or operation command other than

auto changeover operation?

YES

Summary of Contents for ARXB07LALH

Page 1: ...Small VRF system for light commercial and home use SERVICE MANUAL...

Page 2: ......

Page 3: ...SSOR OPERATION 02 01 02 02 02 02 02 03 2 2 3 Speed Range of Start Stop and Operation 2 2 2 Capacity Control 02 02 2 2 1 Operation Stop Condition 2 5 SPECIAL OPERATION 02 09 02 09 02 10 2 5 2 Pre Heat...

Page 4: ...it 4 2 2 Outdoor Unit Display 4 3 TROUBLE SHOOTING 04 04 04 05 4 2 5 Error Code List for Simple and Wired Remote Controller 04 07 4 2 6 Error Code List for Group Remote Controller 04 07 4 2 7 Error Co...

Page 5: ...1 Pressure sensor 05 01 05 02 05 02 5 2 2 Outdoor Unit 05 15 5 3 CHARACTERISTICS OF SENSORS 05 16 05 16 5 3 2 Thermistor resistance 05 17 5 3 3 Saturation temperature and saturation pressure tables R...

Page 6: ......

Page 7: ...1 TEST RUN...

Page 8: ......

Page 9: ...so that the tilt is within 10mm Excessive tilt will cause water leakage Select the size of the heat insulating material according to the ambient temperature and relative humidity of the refrigerant U...

Page 10: ...Perform setting by push button SW on the outdoor unit Main PCB in the power ON state after all indoor units have stopped operation When setting the address of Signal amplifier please refer to the ins...

Page 11: ...e no scratches deformation tilting etc Shall be checked and entered in the check sheet Shall be installed positively Connection points check loose terminal panel screws check 0 33mm2 shielded wire use...

Page 12: ...2 2 Check Items After Power ON 01 04 Function setting Are the necessary functions set For the setting Refer to the page 01 15 18 Outdoor unit Main PCB push button SW setting check Note Cooling test ru...

Page 13: ...ed the figures will be changed slightly It depends on following conditions Outdoor unit capacity Indoor and outdoor temperature Indoor unit capacity Pipe length etc Indoor unit service tool actual mea...

Page 14: ...the procedures below 1 FUNCTION Setting First 2 digits Last 2 digits the display when the main power is turned on When F4 to F9 are displayed continue to press the SELECT button until F3 is displayed...

Page 15: ...below 1 FUNCTION Setting First 2 digits Last 2 digits the display when the main power is turned on When F4 to F9 are displayed continue to press the SELECT button until F3 is displayed MODE EXIT SELE...

Page 16: ...of indoor unit and outdoor unit Press the ENTER button for more than 3 seconds This will be displayed when the Indoor unit connection check starts MODE EXIT SELECT ENTER ENTER ENTER 1 2 1 The number o...

Page 17: ...n Fuction select condition Function mode SWITCH POSITION SW107 SW108 SW109 MODE EXIT SELECT ENTER LED101 GREEN POWER MODE LED105 LED104 LED102 RED ERROR Push button switch 7 Segment LED Lamp Outdoor u...

Page 18: ...l and perform operation check Check that there are no abnormal sounds or vibration sounds during test run operation Perform the test operation for 60 minutes 1 Standard wired remote controller UTY LNH...

Page 19: ...st Operation Central Controller Setting Indoor unit Special setting Indoor Unit Set Temp Range Filter Sign R C Prohibition Group Select All Identify Unit Clear Unit On Select All Details Off Operation...

Page 20: ...Up Down List Heat Auto Cool 26 0 C 24 0C Auto 22 0 C Auto 24 0 C 21 5 C Heat 21 5 C 21 5 C Cool Off Off Off All 21 0 C Heat All LangeGroup LangeGroup Top Up Down List OfficeA PC Room Room 101 Restrant...

Page 21: ...ation is reset by stopping operation of the objective devices by pressing Off of Operation and then pressing OK on the setting screen 01 13 3 4 5 Cancel Off On OK Transferring data Please wait On On R...

Page 22: ...e indoor unit operates or stops All units in the same refrigerant circuit will start to conduct a test run in accordance with the operation mode set by push switch of outdoor unit see 1 2 3 4 After 60...

Page 23: ...scharge temperature The value of the Thermistor 1 is displayed 32 Information on Thermistor 3 Outdoor temperature The value of the Thermistor 3 is displayed 33 Information on Thermistor 4 Suction temp...

Page 24: ...s forbidden 70 Electricity meter No setting 1 Set the ones digit and tens digit of the No of the electricity meter connected to CN135 3 00 99 Setting number x00 x99 00 71 Electricity meter No setting...

Page 25: ...Start Up Error Discharge Temperature 1 Abnormal Low Pressure Abnormal Current Sensor 1 Error Trip Detection Rush Current Limiting Resistor Temp Rise Protection Outdoor Unit FAN motor 1 Lock Error Outd...

Page 26: ...g 2 C 02 Temperature undershoot setting 2 C 31 Heat air temperature trigger 00 Default 0 C 01 Temperature undershoot setting 6 C 02 Temperature slightly undershoot setting 4 C 03 Temperature overshoot...

Page 27: ...2 OUTDOOR UNIT OPERATION CONTROL...

Page 28: ......

Page 29: ...valve coil AC220 240V 50 60Hz 6 5 W Solenoid valve Comp pressure equalizing valve AC220 240V 50Hz 6W Crank case heater For Inverter Compressor AC240V 25W Base heater Field supply AC220 240V 35W LON WO...

Page 30: ...ing protection Failure Refer to chapter 4 TROUBLE SHOOTING Under expansion valve initialization At protective operation Emergency stop Defrost operation 02 02 2 2 COMPRESSOR OPERATION 2 2 2 Capacity C...

Page 31: ...ends on system capacity capacity of compressor operation pipe length and capacity shift switch settings Cooling Heating 02 03 2 2 3 Speed Range of Start Stop And Operation On stop mode 0 rps On operat...

Page 32: ...cess or High pressure 2 63MPa or Discharge SH 10 and Discharge temperature 10 a 1 25 Low pressure value 2 125 High Pressure 3 60MPa 3 30MPa Maximum 3 00MPa Maximum speed 80rps Maximum speed 90rps Maxi...

Page 33: ...ed value TAOUT 30 C 30 C TAOUT 20 C 20 C TAOUT 10 C 10 C TAOUT The initial speed of the outdoor unit is detected by out door temperature sensor 35 52 40 4 46 6 54 High pressure saturation temperature...

Page 34: ...h pressure is monitoring at a set time interval and the fan speed is changed by the following conditions Condition which lowers the fan speed High pressure 3 30MPa and heat sink temperature 80 C Condi...

Page 35: ...is low low pressure saturation 0 C at heating Operation in low noise mode When the low noise mode setting ON from PUSH SW or EXTERNAL INPUT the outdoor unit operates in the low noise mode as follows...

Page 36: ...m reaches closer to the target discharge temperature that is calculated from high and low pressure Cooling mode Heating mode 500 pulses basically Initialization conditions Control range operation stop...

Page 37: ...oling oil recovery operation exceeds 3 hours first time 1hour End condition 30 seconds have elapsed since the start and suction temperature low pressure saturation temperature 5deg or 6 minutes have e...

Page 38: ...perature or when 10 minutes have elapsed from the start When the indoor unit connection capacity is 90 or less after 15 minutes have elapsed Defrosting end judgment temperature 0 39 x outdoor temperat...

Page 39: ...2 times within 40 minutes Pattern reset condition Error reset push button SW executed after power turned on again Compressor stopped permanent stop Error display Starting conditions COMP 25 rps HP 3...

Page 40: ...minutes have elapsed and low pressure 0 18MPa Reset conditions 3 minutes have elapsed and low pressure 0 22MPa EEV of stopped indoor unit opened quickly 450pls Abnormal Low Pressure Protection Contro...

Page 41: ...g 23 5A Frequency Maximum Setting Protection Compressor Pattern starting condition Current value Cooling 23 0A Heating 24 0A Pattern reset condition Current value Cooling 23 0A Heating 24 0A Current D...

Page 42: ......

Page 43: ...3 INDOOR UNIT OPERATION...

Page 44: ......

Page 45: ...ng operation fan speed is decided by the difference between the room temperature and the set temperature 1 The indoor fan starts operation 5 seconds after the electric expansion valve opens However wh...

Page 46: ...ry from the connected indoor units There are 3 priority modes of Neutral Cooling Priority and Heating Priority The operation modes restricted by each of these modes are as follows Priority mode Neutra...

Page 47: ...unit regardless of the current priority mode The priority mode is fixed at either cooling or heating even if the master indoor unit stops Cooling heating switching can be performed by the master indo...

Page 48: ...it by outdoor unit DIP SW 2 Set the master indoor unit by wired remote controller 3 Judge cooling heating by the difference between the master indoor unit s setting temperature and the room temperatur...

Page 49: ...of refrigrant flow The thres hold temperature of stop of refrigrant flow Ts 0 5 C Ts 0 5 C 3 2 4 HEAT Position 1 When using the heating mode set the temperature to a value higher than the current room...

Page 50: ...At tempting to move them manually could result in improper operation in this case stop operation and restart The louvers should begin to operate properly again When used in a room with infants chil dr...

Page 51: ...YPE and COMPACT WALL MOUNTED TYPE 1 3 4 5 2 03 07 1 2 3 4 5 Press the VERTICAL SWING button for more than two seconds The remote controller s Vertical Swing Display will light up In this mode the UP D...

Page 52: ...button for more than two seconds once and again The remote controller s Horizontal Swing Display will go out Airflow direction will return to the setting before swing was begun Example When set to hor...

Page 53: ...the drain pump will turn off in 1 hour after the end of indoor heat exchanger frost prevention operation 4 When the water level in the drain pan rises up and then the float switch functions Microcompu...

Page 54: ...EEV Control pulse During the above operation a refrigerant noise may be from the indoor unit The icing of the indoor heat exchanger is prevented during the cooling and dry mode operation 1 Starting Co...

Page 55: ...used when this controller is used together with the remote controller Wired type A beeping sound is made when a signal is received To set the ON OFF timer 1 2 Adjust the OFF or ON time About 5 second...

Page 56: ...g operation dry operation Heating operation When the sleep timer is set the set temperature automatically rises 1 C every hour The set temperature can rise up to a maximum of 2 C Timer setting 60min 1...

Page 57: ...units Press the Select button to select the indoor unit Press the PROGRAM CLOCK AD JUST button Do not press this button for two sec onds or more otherwise you will en ter the time setting mode Press t...

Page 58: ...to complete the weekly timer setting flashes for two seconds Setting the timer for the other indoor units Before setting the timer for other indoor units press the ENTER button to confirm the settings...

Page 59: ...when the button is pressed 2 Press the DELETE button to cancel the timer mode The timer mode can also be canceled by changing the timer mode using the timer mode button 1 NON STOP OFF TIMER ON TIMER...

Page 60: ...necessary set the second weekly timer settings in the same way When the operating time is set the mark appears 6 Press the TIMER SET button for 2 seconds or more to complete the weekly timer settings...

Page 61: ...e DAY OFF setting is cancelled automatically after the set day has passed Flashing mark indicates the DAY OFF ON OFF ON OFF DAY OFF WEEKLY WEEKLY WEEKLY WEEKLY ON OFF ON OFF DAY OFF To start cancel th...

Page 62: ...ratures as low as 10 12 and 14 C cannot be set depending on the model SET BACK SU MO TU WE TH FR SA 3 6 9 12 15 18 21 SU MO TU WE TH FR SA 3 6 9 12 15 18 21 ex When setting all days together Temperatu...

Page 63: ...4 TROUBLE SHOOTING...

Page 64: ...imer LED Timer Continuous lighting Operation LED Operation Flashing Pattern Indication Lamp Indication type 04 01 Opposite Operation Mode 4 1 NORMAL OPERATION 4 TROUBLESHOOTING 4 1 1 Indoor Unit Displ...

Page 65: ...OW N OISE Blinking Description POWER LED101 ERROR LED102 ON ON OFF OFF P ROTECT 4 ON OFF 1 sec 1 sec Peak Cut Mode Starting condition Discharge temp fixed value 115 C Release condition 3 minutes have...

Page 66: ...times flash 2 3 times flash 1 times flash Continuous flash 2 times flash 3 times flash 10 Continuous flash 1 times flash 3 times flash Continuous flash 4 times flash 1 times flash 11 Continuous flash...

Page 67: ...lay is changed by SELECT short press ENTER short press ENTER short press ENTER short press ENTER long press Short press less than 3 seconds Long press more than 3 seconds Annunciation Type of errors A...

Page 68: ...32 31 30 29 28 27 26 25 24 23 21 2 8 1 5 U 1 6 2 8 6 2 3 6 2 6 6 3 1 6 7 2 6 9 1 2 8 4 7 2 1 7 3 3 7 4 1 7 5 1 7 7 1 8 2 1 8 2 2 8 3 2 8 4 1 8 6 1 8 6 3 8 6 4 7 1 1 Compressor Temp Sensor Error TH10 D...

Page 69: ...Error code display Faulty unit No Remote controller address ERROR CODE DISPLAY GROUP REMOTE CONTROLLER The air conditioning system must be inspected if error code appears on the timer and Clock Displ...

Page 70: ...4 A 5 Low Pressure Abnormal High Pressure Abnormal Compressor Temperature Abnormal Discharge Temperature Abnormal 7 1 7 2 7 3 7 4 7 5 7 7 Heat Sink Temperature Sensor Error Suction Gas Temperature Sen...

Page 71: ...61 4 2 9 Error Code List for Network Convertor UTY VGGX Trouble shooting Error Contents Error Code C 1 1 2 C A Power Supply Error Software Error Communication Error with Group Remote Controller PCB E...

Page 72: ...pressor stop High pressure switch error Inverter compressor stop Inverter error Inverter compressor stop Heat sink temperature abnormal Inverter compressor stop Inverter compressor start up error Inve...

Page 73: ...not be judged without operating the system and the serviceman would not be able to check it if the system power is turned off before visiting the site for repair In Error release you need to operate...

Page 74: ......

Page 75: ...ctive contact or leak current in the power supply circuit Noise Check if there is any equipment causing harmonic wave near electric line Neon bulb or electric equipment that may cause harmonic wave Ch...

Page 76: ...nstallation Manual OK Check power supply voltage AC230V between Indoor unit terminal 1 and 2 Check connection of Connector any lose connector or incorrect wiring Check any shortage or corrosion on PCB...

Page 77: ...e drop or noise etc Instant drop Check if there is a large load electric apparatus in the same circuit Momentary power failure Check if there is a defective contact or leak current in the power supply...

Page 78: ...ctor or incorrect wiring 6 5 35 8 0 30 10 0 12 5 15 8 20 1 25 2 33 6 Resistance Value 25 20 15 10 5 0 Temperature C 3 5 4 3 5 3 Resistance Value 50 45 40 Temperature C OK OK Check Point 3 Check voltag...

Page 79: ...ction Check if thermistor cable is open Reset Power when reinstalling due to removed connector or incorrect wiring OK Check Point 2 Remove connector and check Thermistor resistance value Check Point 3...

Page 80: ...check Thermistor resistance value Resistance Value Temperature C 32 4 35 40 0 30 49 8 62 5 79 1 100 9 129 8 168 6 25 20 15 10 5 0 Resistance Value Temperature C 17 8 21 2 26 3 50 45 40 04 16 OK Check...

Page 81: ...h and check ON OFF switching operation by using a meter If Float switch is defective replace it ON OFF OK Forecast of Cause 1 Float switch defective 2 Shorted connector wire 3 Controller PCB defective...

Page 82: ...replace it Check Point 1 Check rotation of Fan Rotate the fan by hand when operation is off Check if fan is caught dropped off or locked motor If Fan or Bearing is abnormal replace it Check Point 3 Ch...

Page 83: ...Unit Operation LED 1 times Flash Timer LED 2 Times Flash Filter LED Continuous Flash Outdoor Unit E 5 U 1 Error LED Continuous Flash Remote Controller 1 2 Detective Actuators Indoor unit Controller P...

Page 84: ...int 3 Replace Communication PCB Replace Communication PCB If the symptom does not change replace Controller PCB and set up the original address Check Point 1 2 Check outside cause such as noise Check...

Page 85: ...which causes harmonic wave And check the complete insulation of grounding If the same symptom does not reappear after resetting the power possibility of noise is high Check Point 1 Check the connecti...

Page 86: ...ET 3 1 SET 3 2 Master OFF OFF OK Check Point 3 Replace Main PCB Change Main PCB and set up the original address 4 3 2 Trouble Shooring With Error Code OUTDOOR UNIT 1 Wrong DIP SW setting 2 Power suppl...

Page 87: ...heck if momentary open was not generated Check if ground is connection correctly or there are no related cables near the power line Check Point 2 Check the indoor unit power supply Main power ON check...

Page 88: ...connection Detective Actuators Forecast of Cause No communication for 180 seconds or more from all indoor units that once received communication Check Point 4 Check the Terminal resistor setting Term...

Page 89: ...pen was not generated Check if ground is connection correctly or there are no related cables near the power line Check Point 2 Replace Main PCB Change Main PCB and set up the original address Check Po...

Page 90: ...B defective Check Point 4 Replace Inverter PCB Replace Inverter PCB Check if ground is connection correctly or there are no related cables near the power line Check Point 1 1 Turn the power on again E...

Page 91: ...mode 35 execution and the power was turned back on Set contents sum value memorized in EEPROM and sum value calculated based on the set contents read from EEPROM do not match Regarding the sum value o...

Page 92: ...correctly or there are no related cables near the power line Check Point 2 Check the wiring Power supply to Filter PCB INV to Inverter PCB Connector and wiring connection state check Cable open check...

Page 93: ...PCB INV to Inverter PCB Connector and wiring connection state check Check Point 3 Check Main PCB Check Main PCB Power supply Check Point 4 Replace Inverter PCB Replace Inverter PCB 1 Noise momentary...

Page 94: ...ve 4 Main PCB defective Check if ground is connection correctly or there are no related cables near the power line Check Point 4 Replace Main PCB Change Main PCB and set up the original address Check...

Page 95: ...en check Check Point 2 Check the thermistor Thermistor characteristics check Disconnect the thermistor from the PCB and check For the thermistor characteristics refer to the Service Parts Information...

Page 96: ...open check Check Point 2 Check the thermistor Thermistor characteristics check Disconnect the thermistor from the PCB and check For the thermistor characteristics refer to the Service Parts Informati...

Page 97: ...heck For the thermistor characteristics refer to the Service Parts Information 22 Check Point 3 Check voltage of Main PCB DC5 0V Main PCB CN143 3 4 voltage value 5V Remove the thermistor from Main PCB...

Page 98: ...PCB and check For the thermistor characteristics refer to the Service Parts Information Check Point 3 Check voltage of Main PCB DC5 0V Main PCB CN144 1 3 voltage value 5V Remove the thermistor from M...

Page 99: ...stor from the PCB and check For the thermistor characteristics refer to the Service Parts Information 22 Check Point 3 Check voltage of Main PCB DC5 0V Main PCB CN143 1 2 voltage value 5V Remove the t...

Page 100: ...Unit Operation LED 9 times Flash Timer LED 15 Times Flash Filter LED Continuous Flash Outdoor Unit E 77 1 Error Code 77 04 36 Trouble shooting 26 Indicate or Display Detective Actuators Detective det...

Page 101: ...stor Thermistor characteristics check Disconnect the thermistor from the PCB and check For the thermistor characteristics refer to the Service Parts Information 22 Check Point 3 Check voltage of Main...

Page 102: ...istor Thermistor characteristics check Disconnect the thermistor from the PCB and check For the thermistor characteristics refer to the Service Parts Information 22 Check Point 3 Check voltage of Main...

Page 103: ...te check Cable open check Check Point 2 Check the thermistor Thermistor characteristics check Disconnect the thermistor from the PCB and check For the thermistor characteristics refer to the Service P...

Page 104: ...ply section current sensor section 4 Inverter PCB defective Check Point 1 Filter PCB to Inverter PCB current sensor wiring connection state Connector and wiring connection state check Cable open check...

Page 105: ...harge pressure sensor connector disconnection open 2 Discharge pressure sensor defective 3 Main PCB defective OK Check Point 1 Check the discharge pressure sensor connection state Connector connection...

Page 106: ...apsed since the outdoor unit power was turned on and pressure sensor detected value 5 0V was detected 1 Suction pressure sensor connector disconnection open 2 Suction pressure sensor defective 3 Main...

Page 107: ...Check Point 1 Check the high pressure switch connection state Connector and wiring connection state check Cable open check Check Point 2 Check the high pressure switch characteristics Switch character...

Page 108: ...tat After the end of the 1st set the 2nd set is not started if all the compressors in the same refrigerant system are not temporarily stopped Wiring connection state check Cable open check Check Point...

Page 109: ...at sources Discharged air not sucked in Check Point 3 Check the Inverter compressor Check Inverter compressor Check Point 2 Check the Inverter PCB Inverter PCB check Refer to Service Parts Information...

Page 110: ...d again within 40 seconds after restarting Check Point 2 Check the Inverter compressor Inverter compressor check Refer to Service Parts Information Check Point 1 Check the Inverter PCB Inverter PCB ch...

Page 111: ...eration check Check Point 4 Check Main PCB Drive circuit output check Between Pin No 3 and Pin No 2 on CN 116 CN117 DC 13 6 16 5 V Check if speed can be detected If replace Main PCB and and set up ori...

Page 112: ...tor check DC voltage detection circuit check If replace Main PCB and and set up orignal address Check Point 2 Check the power line Power ON Temporary voltage drop not generated Momentary open circuit...

Page 113: ...t 5 Replace the fan motor Ambient temperature not raised by the effect of other heat sources Discharged air not sucked in Check Point 4 Check the static pressure Check if static pressure is set correc...

Page 114: ...imes Flash Filter LED Continuous Flash Outdoor Unit E 9A 1 EEV1 E 9A 2 EEV2 Error Code 9A 04 50 1 EEV coil lose connection Trouble shooting 40 Indicate or Display Detective Actuators Detective details...

Page 115: ...turn Refer to Service Parts Information 14 15 16 Check Point 3 Check the outdoor unit fan heat exchanger Check for foreign matter at heat exchanger Check if fan can be rotated by hand Motor check Chec...

Page 116: ...Filter LED Continuous Flash Outdoor Unit E A3 1 Error Code A3 04 52 Cooling operation OK Heating operation Check Point 1 Check if 3 way valve gas side is open EEV EEV1 EEV2 indoor unit EEV open Strai...

Page 117: ...harge pressure sensor characteristics check For the characteristics of the discharge pressure sensor refer to Service Parts Information Check Point 6 Check the discharge pressure sensor Check Point 7...

Page 118: ...Discharged air not sucked in Check Point 2 Check the outdoor unit fan operation heat exchanger ambient temperature High pressure switch 1 characteristics check For the characteristics of the high pre...

Page 119: ...ange Outdoor unit EEV1 operation check Strainer not clogged Refer to Service Parts Information Check Point 4 Check the outdoor unit EEV strainer clogging Indoor unit EEV operation check Strainer not c...

Page 120: ...etective details OUTDOOR UNIT Error Method Forecast of Cause OK OK OK 1 Signal amplifier power supply defective 2 Signal amplifier overconnected 3 Signal amplifier auto address wrong setting 4 Noise m...

Page 121: ...roller PCB defective Check Point 2 Noise momentary open voltage drop Check if temporary voltage drop was not generated Check if momentary open was not generated Check if ground is connection correctly...

Page 122: ...wave near electric line Neon bulb or electric equipment that may cause harmonic wave Check the complete insulation of grounding Check the fuse and thermal fuse OK NG Replace the fuse or thermal fuse...

Page 123: ...wer failure Check if there is a defective contact or leak current in the power supply circuit Noise Check if there is any equipment causing harmonic wave near electric line Neon bulb or electric equip...

Page 124: ...wings Isn t Communication PCB of Indoor Unit removed Is there loose or removed communication line of Indoor Unit and Outdoor Unit Check Terminator DIP SW SET 5 is installed on Outdoor Main PCB Check l...

Page 125: ...ect sunlight Check Point 5 Check Refrigeration Cycle Check if Strainer is clogged Refer to the figure at right Measure Gas Pressure and if there is a leakage correct it When recharging the refrigerant...

Page 126: ...ck Compressor Refer to Service Parts Information OK OK Is Main Unit installed in stable condition Is the installation of Air suction grille and front panel normal In case of Duct type Is Static Pressu...

Page 127: ...if connection cable is open OK Cause 4 Ext Switch Controller is defective Replace External Switch Controller OK Error Contents The abnormality in connection of remote controller cable Symptom LED repe...

Page 128: ...alue between the terminals at the time of input OPEN More than 50 SHORT Less than 1 OK Cause 5 Ext Switch Controller is defective Replace External Switch Controller OK Cause 1 Connection cable is defe...

Page 129: ...tem design is normal OK Cause 2 External noise OK Cause 4 System Design mistake Check following items Refer to Installation Manual 1 Installation location of Terminal Resistor Only 1 location on NS 2...

Page 130: ...m Error display C 1 No operation Details Condition of occurrence Communication error between CPU and Network Driver IC Release condition Communication is normal between CPU and Network Driver IC Cause...

Page 131: ...ise source OK Error Contents Communication Error A Symptom Error display D14 Flashing or Lighting No operation Cause 1 External noise Upon pressing RESET button SW7 or turning on power proceed as foll...

Page 132: ...source Remove the surrounding noise source YES OK NO Trouble shooting 66 Error Contents Power Supply Error Symptom No display Details Condition of occurrence Normal power is not supplied 7 segment in...

Page 133: ...ecked the power supply is reset Check connection cable wire between Network Convertor and Connected Remote Controller Check connection between Control PCB and Terminal Cause 3 Incorrect setting of Net...

Page 134: ...tered at Replace Group Remote Controller is 3 refrigerant circuits or more even though connected to one converter Make 2 refrigerant circuits or less and wait 2 minutes YES NO Replace Network Converto...

Page 135: ...ng noise source Remove the surrounding noise source YES OK NO Trouble shooting 71 Error Contents Power Supply Error Symptom No display Details Condition of occurrence Normal power is not supplied 7 se...

Page 136: ...Connected Remote Controller Check connection between Control PCB and Terminal Cause 3 Incorrect setting of Network Convertor s DIP SW107 2 Wired RC Validity setting Check Network Convertor PCB DIP SW1...

Page 137: ...heck DIP SW103 1 to 8 of Network Convertor Indoor unit type RC type number of Indoor units connected Check Indoor unit type and RC type of all Indoor units connected to Network Convertor Cause 6 Defec...

Page 138: ...heck DIP SW103 1 to 8 of Network Convertor Indoor unit type RC type number of Indoor units connected Check Indoor unit type and RC type of all Indoor units connected to Network Convertor Cause 6 Defec...

Page 139: ...gram performed an abnormal control Error of inside information of EEPROM initial setting of Network Converor PCB was not normally performed Release condition Micon has been reset and the control of Ne...

Page 140: ...shing Details Condition of occurrence When EEPROM can not be written or the control port does not operate Release condition Power is reset 4 Group Remote Controller UTY CGGY CGGG Trouble shooting 77 C...

Page 141: ...e key to enter the function selection process Trouble shooting 78 Trouble shooting 79 Cause 1 Connection failure Check power to the convertor Check connection of remote control line between controller...

Page 142: ...convertor power line is disconnected Check connection between controller and the convertor Instant drop Check if there is a large load electric apparatus in the same circuit Momentary power failure C...

Page 143: ...1 Remote Controller internal thermistor trouble Replace Group Remote Controller Cause 2 Check outside cause Voltage drop or noise etc Instant drop Check if there is a large load electric apparatus in...

Page 144: ...trouble OK OK OK OK Check cable Check indoor unit power supply Check if the indoor unit remote controller addresses are sequentially set from 0 Replace remote controller Change Controller PCB and set...

Page 145: ...ndoor unit power supply For the check and modification methods refer to the remote controller including external SW installation manual When there is 1 remote controller check whether or not it is set...

Page 146: ...o the terminal of the undetected unit Using Service Tool perform scan changing the network segment where the Service Tool is connected and localize the mistaken network segment Start from the network...

Page 147: ...re the defect of Compressor can be considered Compression part broken or valve defective In case of constant speed compressor check connection and winding resistance Check if Protector is operated Ref...

Page 148: ...ention If Check 1 2 are normal make sure the following points 1 Check AC voltage among each terminals from filter PCB INV to Diode Bridge Rated voltage among L and N If it does not appear check the po...

Page 149: ...pressure low pressure connected to the connector of the Main PCB 9 Is there a short between pins 1 3 of the Main PCB side connector Replace Main PCB YES YES NO NO Replace Main PCB Check Main PCB 2 YE...

Page 150: ...k Inverter PCB 4 10 Disconnect the connection wires 8 pin connector between the Inverter PCB Main PCB 11 Is there a short between Inverter PCB side connector pins 1 2 and 2 3 Inverter PCB side short c...

Page 151: ...tween the following terminals Yellow wire P Fasten terminals U V W Blue wire N Fasten terminals U V W Set the tester to the Diode mode and measure the voltage value between the following terminals Jud...

Page 152: ...1 Appearance check Check Point 2 Electric check Set the tester to the Resistance mode and check for open short between both ends of the reactor wire or connector Judge the result of as follows Short N...

Page 153: ...s Stripped threads deformation damage etc No short between adjacent terminals Conducts before and after same terminal Not clogged with foreign matter Check Point 1 Appearance check Check Point 2 Elect...

Page 154: ...Check Connections Check Connectors Loose connector or open cable Duct Small Wall mount Cassette Wall mount Floor Ceiling Ceiling Check Point 3 Check Voltage from Controller PCB Remove Connector and c...

Page 155: ...6 Check Strainer Strainer normally does not have temperature difference between inlet and outlet as shown in 1 but if there is a difference as shown in 2 there is a possibility of inside clogged In th...

Page 156: ...ot show replace Controller PCB Pipe In Pipe Out Pipe In Pipe Out Check Point 6 Check Strainer Strainer normally does not have temperature difference between i nlet and outlet as shown in 1 but if ther...

Page 157: ...eration noise If an abnormal noise does not show replace Controller PCB Pipe In Pipe Out Pipe In Pipe Out Check Point 6 Check Strainer Strainer normally does not have temperature difference between i...

Page 158: ...ENOIDE COIL SOLENOIDE COIL Normal Operation Pipe In TEMP Hi Pipe Out TEMP Normal Protection Function Pipe In TEMP Pipe Out TEMP OPEN CLOSE Check Point 4 Check opening closing operation of Valve Depend...

Page 159: ...not proper replace 4 way valve HOT GAS HOT GAS HOT GAS HOT GAS Check Point 4 Check Voltage from Controller PCB ON OFF CN105 BLUE SOLENOIDCOIL 4WV BLUE 1 1 2 2 Check Point 1 Check Circuit connection C...

Page 160: ...e of the motor If Resistance value is abnormal replace motor Red Pink Pink Violet Violet Blue Red Black White Red Lead wire 47 1 8 27 4 8 8 00 8 8 00 8 8 00 8 Resistance value AC Thermal protector Pr...

Page 161: ...nce value AC Thermal protector Pr VIOLET Low BLUE S Lo PINK Med RED Hi BLACK WHITE 150 C at 20 C Check Point ARXA36 45LATH Duct Type Check each winding resistance of the motor If Resistance value is a...

Page 162: ...ce of the motor If Resistance value is abnormal replace motor Red Pink Pink Violet Violet Blue Red Black White Red Lead wire 322 8 8 255 8 100 7 8 103 8 53 8 Resistance value AC Thermal protector Pr V...

Page 163: ...tance value AC Thermal protector Pr VIOLET Low BLUE S Lo PINK Med RED Hi BLACK WHITE 140 C at 20 C Check Point ARXB18LALH Compact Duct Type Check each winding resistance of the motor If Resistance val...

Page 164: ...3 8 Resistance value AC Thermal protector Pr VIOLET Med BLUE Low RED Hi BLACK WHITE 150 C at 20 C Check Point ARXC45LATH High Static Pressure Duct Type Check each winding resistance of the motor If Re...

Page 165: ...GND Earth terminal If they are short circuited below 300 k replace Indoor fan motor and Controller PCB Pin number wire color Terminal function symbol 1 Brown or Blue 2 Yellow 3 White 4 Black 5 6 Red...

Page 166: ...sure Sensor Characteristics of pressure sensor 4 5 5 0 0 5 0 Output V Pressure MPa DC Check Point Check Voltage from Main PCB DC With the connector connected to the PCB measure the voltage between CN1...

Page 167: ...CE PARTS INFORMATION 15 Pressure switch Type of contact Characteristics of pressure switch C H Pressure Pressure switch For Inverter comp 4 2 0 1MPa 3 2 0 15MPa Contact Short Open Contact Open Short 0...

Page 168: ...25 30 40 50 60 70 80 90 100 110 120 168 6 129 8 100 9 79 1 62 6 49 8 40 0 26 3 17 8 12 3 8 7 6 3 4 6 3 4 2 6 2 0 27 8 21 0 16 1 12 4 9 6 7 6 6 0 4 8 3 8 2 5 1 7 1 2 105 4 58 2 44 0 33 6 25 9 20 2 15 8...

Page 169: ...mode and measure the resistance between the following terminals Judge the result of as follows All 3 points several M or greater Normal 1 or more points several k to short Defective IN IN L1 L2 P N C...

Page 170: ...Vm DC voltage GND Earth terminal If they are short circuited below 300 k replace Outdoor fan motor Pin number wire color Terminal function symbol 1 Red 2 3 4 Black 5 White 6 Yellow 7 Brown DC voltage...

Page 171: ...5 APPENDING DATA UNIT...

Page 172: ......

Page 173: ...e Regulation Valve TH1 Discharge temp TH3 Outdoor temp TH4 Suction temp TH5 Heat Exchanger Liquid Pipe temp TH7 Sub cool Heat Exchanger Outlet Liquid temp TH8 Sub cool Heat Exchanger Inlet Gas temp TH...

Page 174: ...05 02 5 2 WIRING DIAGRAM 5 2 1 Indoor Unit MODELS AUXB07 09 12 14 18 24LALH...

Page 175: ...05 03 MODELS AUXD18 24LALH AUXA30 36 45 54LALH...

Page 176: ...05 04 MODELS ARXB07 09 12 14 18LALH...

Page 177: ...05 05 MODEL ARXB24LATH MODELS ARXB30 36LATH...

Page 178: ...05 06 MODEL ARXB45LATH...

Page 179: ...05 07 MODEL ARXA24LATH MODELS ARXA30 36 45LATH...

Page 180: ...MODELS ARXC36 45LATH 05 08...

Page 181: ...05 09 MODELS ARXD07 09 12 14 18 24LATH...

Page 182: ...MODELS AB A12 14 18 24LBTH 05 10...

Page 183: ...05 11 MODELS AB A30 36 45 54LBTH...

Page 184: ...MODELS AS A07 09 12 14LACH 05 12...

Page 185: ...MODELS AS E07 09 12 14LACH 05 13...

Page 186: ...MODELS AS A18 24 30LACH 05 14...

Page 187: ...05 15 MODELS AJ A36 45 54LALH 5 2 2 Outdoor Unit...

Page 188: ...50 0 70 0 80 0 90 1 00 1 20 1 40 1 60 1 80 2 00 Pressure MPa Output V 0 50 0 58 0 66 0 74 0 82 0 90 1 06 1 14 1 22 1 30 1 46 1 62 1 78 1 94 2 10 2 20 2 40 2 60 2 80 3 00 3 20 3 40 3 60 3 80 4 00 4 20...

Page 189: ...10 Outdoor temp TH3 Heat exchanger TH5 Suction temp TH4 Sub cool heat exchanger Gas inlet TH8 Sub cool heat exchanger Gas outlet TH9 Sub cool heat exchanger Liquid temp TH7 6 5 35 8 0 30 10 0 12 5 15...

Page 190: ...1 513 1 557 1 601 1 647 1 693 1 740 1 788 1 837 1 887 1 938 1 990 2 043 2 097 2 152 2 208 2 265 2 323 2 382 2 442 2 503 2 565 2 629 2 693 2 759 2 826 2 894 2 963 3 034 3 106 3 178 3 253 3 328 3 405 3...

Page 191: ...0 0 5 1 0 1 5 2 0 2 5 3 0 3 5 4 0 4 5 30 20 10 0 10 20 30 40 50 60 Saturated liquid pressure MPa Gauge pressure Saturated liquid temperature C 05 19 5 3 4 Temperature and pressure of refrigerant Grap...

Page 192: ......

Page 193: ...6 DISASSEMBLY PROCESS...

Page 194: ......

Page 195: ...the CONTROL COVER by sliding toward Remove the SERVICE PANEL by sliding downward 06 01 6 DISASSEMBLY PROCESS Before servicing the unit turn the power supply switch OFF Then do not touch electric parts...

Page 196: ...spacers Remove the connector Remove the COMMUNICATION PCB 06 02 Spacers Terminal Earth screw COMMUNICATION PCB Connector 5 COMMUNICATION PCB removal CN102 CN150 Caution Be careful about position of F...

Page 197: ...PCB FILTER PCB and ACTPM removal Open the CONTROL BOX MAIN Remove the spacers 8 places Remove the connectors and screws Screws AC IN Earth screw Spacers 6 1 FILTER PCB removal Note the tightening tor...

Page 198: ...sible from IPM and Diode Bridges when you exchange INVERTER PCB by the repair 2 Spread the heat transfer compound evenly on IPM and Diode Bridges 3 Prevent foreign matter from attaching to the surface...

Page 199: ...h Solenoid Coil 4 way valve Solenoid Coil Solenoid Valve Pressure Sensor High Pressure Wear gloves to prevent the frostbite because a small amount of refrigerant leaks during work CAUTION Remove the P...

Page 200: ...he THERMISTOR SPRING Remove the THERMISTOR Careful not to disconnect the thermistor wire with a strong pull 7 2 SOLENOID COIL Solenoid valve removal 7 3 SOLENOID COIL 4way valve removal Remove the mou...

Page 201: ...GUARD by sliding upward Note at the installation Insert propeller Fan and Moter shaft reference D cutting position And the tightening torque at the installation Tightening torque is from 10 to 12N m N...

Page 202: ...screws Remove the PIPE COVER FRONT screw serrated screw with washer Hooks 12 CHOKE COIL removal Remove the mounting screws Remove the mounting screw Remove the BRACKET CONTROL BOX Remove the connecto...

Page 203: ...PANEL removal 06 09 Remove the mounting screws Remove the RIGHT PANEL by sliding upward 14 PIPE COVER REAR removal Remove the mounting screws Remove the PIPE COVER REAR Screws with washer Hook Screws...

Page 204: ...3 Fully open the 3WAY VALVE Gas and 3WAY VALVE Liquid 4 Open the EEVs of Outdoor units and Indoor units by vaccuming mode 5 Collect the refrigerant from the 3WAY VALVE Start the following work after...

Page 205: ...NK CASE Discharge side Cut the binder and remove the heat insulation Remove the Thermistor Discharge Remove the Thermistor Comp temp and Thermistor Discharge Remove the Terminal Cover and Compressor w...

Page 206: ...refrigerant pipes during work 6 When brazing be sure to replace the air in the pipe with nitrogen gas to prevent forming oxidization scale 7 Open the 3WAY VALVE because there is a possibility of squir...

Page 207: ...neral Limited All rights reserved TM is a worldwide trademark of FUJITSU GENERAL LIMITED Product specifications are subject to change without notice 1116 Suenaga Takatsu ku Kawasaki 213 8502 Japan Pri...

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