Fujitsu ABU18RULX Service Instruction Download Page 23

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01-20

[ Cooling ]

ABU18RULX

T0 > 113°F (45°C)

77°F > T0 > 66.2°F
(25°C) (19°C)

66.2°F > T0 > 55.4°F
(19°C) (13°C)

55.4°F > T0 > 44.6°F
(13°C) (7°C)

T0 < 32°F (0°C)

113°F > T0 > 77°F
(45°C) (25°C)

44.6°F > T0 > 32°F
(7°C) (0°C)

T0: Outdoor temperature

780 rpm

400 rpm

250 rpm

220, 200 rpm

8.0A / 7.5A

5.0A / 4.5A

4.0A / 3.5A

5.0A / 4.5A

6.5A / 6.0A

7.5A / 7.0A

7.0A / 6.5A

8.0A / 7.5A

8.5A / 8.0A

9.0A / 8.5A

10.0A / 9.5A

12.0A / 11.5A 12.0A / 11.5A

Outdoor unit fan speed

ABU24RULX

T0 > 113°F (45°C)

77°F > T0 > 66.2°F
(25°C) (19°C)

66.2°F > T0 > 55.4°F
(19°C) (13°C)

55.4°F > T0 > 44.6°F
(13°C) (7°C)

T0 < 32°F (0°C)

100.4°F > T0 > 77°F
(38°C) (25°C)

113°F > T0 > 100.4°F
(45°C) (38°C)

44.6°F > T0 > 32°F
(7°C) (0°C)

T0: Outdoor temperature

900 ,850 rpm

780 rpm

400 rpm

250 rpm

220, 200 rpm

8.0A / 7.5A

5.0A / 4.5A

4.0A / 3.5A

5.0A / 4.5A

6.5A / 6.0A

7.5A / 7.0A

7.0A / 6.5A

8.0A / 7.5A

8.5A / 8.0A

9.0A / 8.5A

10.0A / 9.5A

12.0A / 11.5A

12.0A / 11.5A 12.0A / 11.5A

Outdoor unit fan speed

ABU36RSLX

T0 > 113°F (45°C)

100.4°F > T0 > 66.2°F
(38°C) (19°C)

66.2°F > T0 > 55.4°F
(19°C) (13°C)

55.4°F > T0 > 44.6°F
(13°C) (7°C)

T0 < 32°F (0°C)

113°F > T0 > 100.4°F
(45°C) (38°C)

44.6°F > T0 > 32°F
(7°C) (0°C)

T0: Outdoor temperature

900 ,850 rpm

780 rpm

400 rpm

250 rpm

220, 200 rpm

10.0A / 9.5A

7.0A / 6.5A

5.5A / 5.0A

7.0A / 6.5A

9.5A / 9.0A

12.0A / 11.5A

14.0A / 13.5A

18.0A / 17.5A

14.0A / 13.5A

15.0A / 14.5A 15.0A / 14.5A

Outdoor unit fan speed

Summary of Contents for ABU18RULX

Page 1: ...SPLIT TYPE ROOM AIR CONDITIONER Universal Floor Ceiling Large Ceiling type Models Indoor unit Outdoor unit ABU18RULX ABU24RULX ABU36RSLX AOU18RLX AOU24RLX AOU36RLX INVERTER SERVICE INSTRUCTION R410A ...

Page 2: ...E FUNCTION 01 01 01 02 01 03 01 04 01 05 01 07 01 08 01 10 01 11 01 15 01 15 01 15 01 15 01 16 01 16 01 16 01 18 01 18 01 19 01 15 2 1 3 WIRED REMOTE CONTROLLER DISPLAY 2 1 2 OUTDOOR UNIT DISPLAY 2 1 ERROR DISPLAY 2 TROUBLE SHOOTING 2 2 TROUBLE SHOOTING WITH ERROR CODE 2 3 TROUBLE SHOOTING WITH NO ERROR CODE 2 4 SERVICE PARTS INFORMATION 02 01 02 02 2 1 1 INDOOR UNIT DISPLAY 02 01 02 03 02 24 02 0...

Page 3: ...1 DESCRIPTION OF EACH CONTROL OPERATION R410A Universal Floor Ceiling Large Ceiling type INVERTER ...

Page 4: ...ture the compressor frequency is controlled within the range shown in Table1 However the maximum frequency is limited in the range shown in Figure 1 based on the fan speed mode and the outdoor temperature minimum frequency maximum frequency ABU18RULX 20Hz 20Hz 20Hz 63Hz 80Hz 90Hz ABU24RULX ABU36RSLX Outdoor air temperature A zone 87 8 F 31 C B zone C zone D zone Hi Me Lo A zone 63Hz 45Hz 35Hz 35Hz...

Page 5: ...egC to 5 4 degF 3 degC of the setting temperature the compressor frequency is controlled within the range shown in Table2 However the maximum frequency is limited in the range shown in Figure 2 based on the outdoor temperature Table 2 Compressor Frequency Range Fig 2 Limit of Maximum Frequency based on Outdoor Temperature 01 02 minimum frequency maximum frequency 20Hz 20Hz 20Hz 87Hz 87Hz 95Hz Outd...

Page 6: ... shown in the Table 3 Room temperature Room temperature Compressor ON Ts 2 7 degF 1 5 degC Ts 1 8 degF 1 degC Compressor OFF Compressor ON ON OFF Indoor fan air flow mode Air flow mode Lo OFF 30 5 30 120 5 sec 180 180 Table 3 Compressor frequency Fig 3 Compressor Control based on Room Temperature Fig 4 Indoor Fan Control 01 03 Operating frequency ABU18RULX 25Hz 30Hz 45Hz ABU24RULX ABU36RSLX Ts Set...

Page 7: ...t s operarion mode the operation mode is selected in accordance with the table below Table 4 Operation mode selection table When COOLING was selected at the same operation as COOLING OPERATION is performed When HEATING was selected at the same operation as HEATING OPERATION is performed When the compressor was stopped for 6 consecutive minutes by the temperature control function after the COOLING ...

Page 8: ...igure 5 On the other hand if switched in HIGH LOW the indoor motor will run at a constant airflow of COOL operation modes LOW MED HIGH as shown in Table 5 Fig 5 Airflow change over Cooling AUTO When the room temperature rises When the room temperature drops TR Room temperature Ts Setting temperature TR Ts 3 6 degF 2 degC 1 8 degF TR Ts 1 degC 3 6 degF TR Ts 1 8 degF 2 degC 1 degC TR Ts 5 4 degF 3 ...

Page 9: ...RY OPERATION Refer to the Figure 4 During the dry mode operation the fan speed setting can not be changed 01 06 116 6 F 47 C 105 8 F 41 C SETTING FAN MODE LO mode S LOW mode 91 4 F 33 C 86 F 30 C 86 F 30 C Indoor heat exchanger temperature Indoor heat exchanger temperature Indoor heat exchanger temperature The maximum value of the indoor fan speed is set as shown in Figure 7 based on the detected ...

Page 10: ...anges to the lower speed For ABU18RULX It runs at 250rpm for 20 seconds after starting up the outdoor fan When the outdoor heat exchanger tenperature is lower than 35 6 F 2 C the fan speed switches to 780rpm on heating mode For ABU24RULX ABU36RSLX It runs at 250rpm for 20 seconds after starting up the outdoor fan When the outdoor heat exchanger tenperature is lower than 35 6 F 2 C the fan speed sw...

Page 11: ...s either at S Lo or Stop mode the swinging operation is interrupted and the louver stops at the memorized position 01 08 The indoor fan motor starts after the louver reaches to the setting position At the start of operation if the setting louver position is or the setting position is set to or after the louver moves from totally enclosed position to Positioning Control Stop mode means Operation st...

Page 12: ...WING OPERATION When the swing signal is received from the remote controller the horizontal louver starts to swing The range of swing depends on the set airflow direction When the indoor fan is either at S Lo or Stop mode the swinging operation is interrupted and the louver stops at the memorized position 01 09 Stop mode means Operation stop ABU18 24RULX UNIVERSAL FLOOR CEILING TYPE ABU36RSLX LARGE...

Page 13: ...trolled as shown in Figure 10 Fig 10 Compressor Control at Start up Frequency Time Frequency Frequency Frequency Frequency 01 10 ABU18RULX 20Hz 20Hz 20Hz 63Hz 80Hz 90Hz ABU24RULX ABU36RSLX ABU18RULX ABU24RULX ABU36RSLX ABU18RULX ABU24RULX ABU36RSLX 20Hz 20Hz 20Hz 87Hz 87Hz 95Hz 25Hz 30Hz 45Hz 180sec 60sec 120sec 120sec 720sec 40Hz 56Hz Time A Time B Time C Time E Time D Time A Time B Time C Time D...

Page 14: ...troller accessory parts ON TIMER OFF TIMER PROGRAM TIMER SLEEP TIMER The program timer allows the OFF timer and ON timer to be used in combination one time Operation mode Operation will start from the timer setting either OFF timer or ON timer whichever is closest to the clock s current timer setting The order of operations is indicated by the arrow in the remote control unit s display SLEEP timer...

Page 15: ...mer is set the setting temperature is increased 1 8 degF 1 degC It increases the setting temperature another 1 8 degF 1 degC after 1 hour After that the setting temperature is not changed and the operation is stopped at the time of timer setting Ts 1 8degF 1degC 3 6degF 2degC 3 6degF 2degC 1 8degF 1degC 7 2degF 4degC 5 4degF 3degC Set 60min In the heating operation mode When the sleep timer is set...

Page 16: ...this timer function to set operating time for each day of the week Operation mode The operating time can be set in 30 min increments only The OFF time can be carried over to next day The ON timer and the OFF timer functions cannot be set with using the weekly timer Both ON and OFF time must be set 2 WEEKLY TIMER 2 1 WEEKLY TIMER Stop mode Stop mode Stop mode Operation mode Operation mode Set time ...

Page 17: ... day has passed Normal Next day setting If the operating time carries over to the next day during a next day setting the effective DAY OFF range will be set as shown below 2 2 DAY OFF setting 3 TEMPERATURE SET BACK TIMER Stop mode Stop mode Operation mode Stop mode Operation mode Preceding day Next day DAY OFF Stop mode Stop mode Operation mode Stop mode Operation mode DAY OFF Setting day Precedin...

Page 18: ...ion is given At the time when the air conditioner is switched from the cooling mode to heating mode the compressor is stopped and the 4 way valve is switched in 3 minutes later after the compressor stopped When the power was interrupted by a power failure etc during operation the operation contents at that time are memorized and when power is recovered operation is automatically resumed with the m...

Page 19: ...s 3 Outdoor temp 30 2 F 1 C 4 Outdoor temp 30 2 F 1 C 2 Compressor stop time Below 20min Select 6min Above 20min Select 10min After 6 min 1 or 10min 2 Compressor integrating operation Less than 45min Compressor integrating operation 45min and over 17 6 F 8 C 3 14 F 10 C 4 Does not operate 15 PUMP DOWN Refrigerant collecting operation 1 It means contiguous operation time When the product is stopped...

Page 20: ... 34 sec later compressor ON Frequency 92 Hz Heating operation start Compressor ON Defrost Indicator Operation lamp 9 sec ON 1 sec OFF Outdoor heat exchanger temperature Over 53 6 F 12 C or Compressor ON time Over 15 minutes Defrost end 01 17 Compressor integrating operation 45 minutes and over Outdoor heat exchanger temperarure Below 14 F 10 C Outdoor heat exchanger temperarure Below 17 6 F 8 C De...

Page 21: ...egC every 30 minutes Afterwards energy consumption is saved by continuing to heat at a thermostat temperature of 7 2 degF 4 degC lower than setting temperature 1hour 1 8 degF 1 degC 3 6 degF 2 degC ENERGY SAVE ON Setting temperature 1 8degF 1degC 3 6degF 2degC 5 4degF 3degC 7 2degF 4degC 30min 1 hour 1 hour 30 min ENERGY SAVE ON Setting temperature 18 MANUAL AUTO OPERATION Using the Wireless Remot...

Page 22: ... unit input current does not exceeds the current limit value that was set up with the outdoor temperature The compressor frequency returns to the designated frequency of the indoor unit at the time when the frequency becomes lower than the release value Table 13 Current Release Operation Value Release Value Heating 01 19 Temperature Temperature Temperature Temperature ABU18RULX ABU24RULX ABU36RSLX...

Page 23: ... C 25 C 113 F T0 100 4 F 45 C 38 C 44 6 F T0 32 F 7 C 0 C T0 Outdoor temperature 900 850 rpm 780 rpm 400 rpm 250 rpm 220 200 rpm 8 0A 7 5A 8 0A 7 5A 8 0A 7 5A 5 0A 4 5A 4 0A 3 5A 5 0A 4 5A 6 5A 6 0A 7 5A 7 0A 7 0A 6 5A 8 0A 7 5A 8 5A 8 0A 9 0A 8 5A 10 0A 9 5A 10 0A 9 5A 12 0A 11 5A 12 0A 11 5A 12 0A 11 5A Outdoor unit fan speed ABU36RSLX T0 113 F 45 C 100 4 F T0 66 2 F 38 C 19 C 66 2 F T0 55 4 F 1...

Page 24: ...ing based on the detection value of the indoor heat exchanger temperature sensor Fig 12 Heating Overload Protection Control 01 21 145 4 F 63 C 129 2 F 54 C 122 F 50 C Compressor is OFF The compressor frequency is decreased 10Hz every 60seconds Compressor OFF Release of protection Compressor ON The compressor frequency is increased 10Hz every 60seconds Hold Indoor heat exchange temperature 37 4 F 3...

Page 25: ...2 TROUBLE SHOOTING R410A INVERTER Universal Floor Ceiling Large Ceiling type ...

Page 26: ...5sec ON OFF 0 1sec 0 1sec ON OFF 1 ERROR DISPLAY 2 ERROR DISPLAY METHOD Error Contents 2 times blink 2 times blink 3 times blink 3 times blink 5 times blink 6 times blink 5 times blink 3 times blink 4 times blink 5 times blink 8 times blink 9 times blink 10 times blink 11 times blink 12 times blink 13 times blink 14 times blink OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF Trouble sh...

Page 27: ...utdoor communication signal error Forward transfer signal error 1 time blink 2 times blink 3 times blink 4 times blink 7 times blink 8 times blink 9 times blink 12 times blink 13 times blink 14 times blink 15 times blink 1 2 3 4 5 6 7 8 9 10 11 Outdoor heat exchanger temperature sensor error Outdoor temperature sensor error Outdoor discharge pipe temperature sensor error Outdoor unit fan motor err...

Page 28: ...O TU WE TH FR SA 2 1 3 WIRED REMOTE CONTROLLER DISPLAY optional parts THERMO SENSOR 1 SELF DIAGNOSIS Error code Error contents Trouble shooting Communication error Serial reverse transfer error Room temperature sensor open Room temperature sensor short circuited Indoor heat exchanger temperature sensor open Indoor heat exchanger temperature sensor short circuited Outdoor heat exchanger temperature...

Page 29: ...or 5 seconds or more or there is no key input for 20 seconds to stop the display DAY 2 ERROR CODE HISTORY DISPLAY Up to 16 memorized error codes may be displayed for the indoor unit connected to the remote controller 4 Press the SET TEMPERATURE button to select the error history number SU MO TU WE TH FR SA Error code Error history number Lower 3 Press the START STOP button 0 1 2 3 4 5 6 7 F E d c ...

Page 30: ...r check correct the followings Check the connection of terminal between remote control and Indoor unit and check if there is a disconnection of the cable Upon correcting the removed connector or mis wiring reset the power Check Voltage at CN17 of Controller PCB Power supply to Remote Control If it is DC12V Remote Control is failure Controller PCB is normal Replace Remote Control If it is DC 0V Con...

Page 31: ...ection Check any loose or removed connection line of Indoor unit and Outdoor unit If there is an abnormal condition correct it by referring to Installation Manual or Data Technical Manual Check connection between Outdoor Unit Main PCB and Filter PCB If there is loose connector or open cable Check Point 3 Check the voltage of power supply Check the voltage of power supply Check if AC208 230V appear...

Page 32: ...E TEMP THERMISTOR ROOM TEMP GRAY GRAY BLACK BLACK CN7 CN8 1 2 1 2 Room Temperature Sensor Error Indoor Unit Controller PCB Circuit Room Temperature Thermistor When Room Temperature Thermistor open or short circuit is detected at power ON 1 Connector connection failure 2 Thermistor failure 3 Controller PCB failure Check if connector is removed Check erroneous connection Check if thermistor cable is...

Page 33: ...ON 1 Connector connection failure 2 Thermistor failure 3 Controller PCB failure Check Point 1 Check connection of Connector Check if connector is removed Check erroneous connection Check if thermistor cable is open Upon correcting the removed connector or mis wiring reset the power Check Point 2 Remove connector and check Thermistor resistance value Thermistor Characteristics Approx value If Therm...

Page 34: ...hermistor When Heat Exchanger Temperature Thermistor open or short circuit is detected at power ON or while running the compressor 1 Connector connection failure 2 Thermistor failure 3 Main PCB failure Check Point 1 Check connection of Connector Check if connector is removed Check erroneous connection Check if thermistor cable is open Upon correcting the removed connector or mis wiring reset the p...

Page 35: ... Unit Main PCB Circuit Outdoor Temperature Thermistor When Outdoor Temperature Thermistor open or short circuit is detected at power ON or while running the compressor 1 Connector connection failure 2 Thermistor failure 3 Main PCB failure Check Point 1 Check connection of Connector Check if connector is removed Check erroneous connection Check if thermistor cable is open Upon correcting the remove...

Page 36: ...ipe Temperature Sensor Error Outdoor Unit Main PCB Circuit Discharge Pipe Temperature Thermistor When Discharge Pipe Temperature Thermistor open or short circuit is detected at power ON or while running the compressor 1 Connector connection failure 2 Thermistor failure 3 Main PCB failure Check Point 1 Check connection of Connector Check if connector is removed Check erroneous connection Check if t...

Page 37: ...e same circuit Momentary power 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 equipment that may cause harmonic wave Check the complete insulation of grounding Note EEPROM EEPROM Electronically Erasable and Programmable Read Only Memory is a non volatile m...

Page 38: ...Fan motor PARTS INFORMATION 5 If Fan motor is abnormal replace it Check excessively high temperature around the motor If there is any surrounding equipment that causes heat Upon the temperature coming down restart operation Check continuity of motor capacitor If it is shorted replace the capacitor Check indoor unit circuit diagram and the output voltage between 2 White and 3 Red of CN5 If the volt...

Page 39: ...k the complete insulation of the grounding Check if there is any equipment that causes harmonic wave near the power cable Neon light bulb or any electronic equipment which causes harmonic wave Check the voltage of power supply Check if AC208 230V appears at Outdoor Unit Terminal L N Check if Indicated value swings between AC70V and AC130V at Outdoor Unit Terminal 2 3 Check any loose or removed con...

Page 40: ...perature Sensor Error Outdoor Unit Main PCB Circuit Compressor Temperature Thermistor When Compressor Temperature Thermistor open or short circuit is detected at power ON or while running the compressor 1 Connector connection failure 2 Thermistor failure 3 Main PCB failure Check Point 1 Check connection of Connector Check if connector is removed Check erroneous connection Check if thermistor cable...

Page 41: ...CB Circuit Pressure Switch 1 Connector connection failure 2 Pressure Switch failure 3 Main PCB failure When pressure switch open is detected in 10 seconds after the power is turned on Does abnormal LED indication show again Make sure circuit diagram of outdoor unit and check terminal voltage at Pressure Switch DC5 0V If the voltage does not appear replace Main PCB Check if connector is loose or ca...

Page 42: ...ection Check if cable is open Upon correcting the removed connector or mis wiring reset the power Check Point 2 Check Outdoor Fan Heat Exchanger Is there anything obstructing the air distribution circuit Is there any clogging of Outdoor Heat Exchanger Is the Fan rotating by hand when operation is off Check Outdoor Fan Motor Refer to Trouble shooting 17 If the Fan Motor is locked replace it If the ...

Page 43: ...tus in the same circuit Momentary power 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 equipment that may cause harmonic wave Check the complete insulation of grounding Check Point 1 1 Reset Power Supply and operate Does Error indication show again When In...

Page 44: ... Module PARTS INFORMATION 3 If Active Filter Module is abnormal replace it Check Point 4 Replace Main PCB If Check Point 1 2 do not improve the symptom change Main PCB Check Point 1 Check external cause at Indoor and Outdoor Voltage drop or Noise 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 ...

Page 45: ...k Point 1 do not improve the symptom change Main PCB Check if connector is removed Check erroneous connection Check if cable is open Upon correcting the removed connector or mis wiring reset the power Refer to PARTS INFORMATION 2 For Compressor Terminal Main PCB While running the compressor if the detected rotor location is out of phase with actual rotor location more than 90 degrees the compresso...

Page 46: ...d the motor If there is any surrounding equipment that causes heat Upon the temperature coming down restart operation Check Point 3 Check Output Voltage of Main PCB Check outdoor unit circuit diagram and the voltage Measure at Main PCB side connector If the voltage is not correct replace Main PCB When outdoor fan rotation speed is less than 100rpm in 20 seconds after fan motor starts fan motor sto...

Page 47: ...5 104 F 40 C Temperature Heat Sink Temperature Sensor Error Outdoor Unit Main PCB Circuit Heat Sink Temperature Thermistor When Heat Sink Temperature Thermistor open or short circuit is detected at power ON or while running the compressor 1 Connector connection failure 2 Thermistor failure 3 Main PCB failure Check Point 1 Check connection of Connector Check if connector is removed Check erroneous ...

Page 48: ...ts if the same operation is repeated within 40sec the compressor stops again If and repeats 5 times the compressor stops permanently Outdoor Unit Main PCB Circuit 1 Defective connection of electric components 2 Main PCB failure Check Point 1 Check connection of around the Compressor components OK OK Check Point 2 Replace Main PCB If Check Point 1 do not improve the symptom replace Main PCB Check i...

Page 49: ...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 Check the complete insulation of grounding Check Point 3 Check Electrical Components Check Voltage of power supply Check AC208 230V appears at Indoor Unit Terminal 1 2 Power Supply Check Fuse F101 in Fi...

Page 50: ...ve 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 Check the complete insulation of grounding Check the voltage of power supply Check if AC208 230V appears at Outdoor Unit Terminal L N YES YES Check Fuse F2 F4 in Main PCB If Fuse is open check loose termin...

Page 51: ... manual and Data Technical Manual Turn off Power and check correct followings Is there loose or removed communication line of Indoor Unit and Outdoor Unit 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 circuit Noise Check if there is any equipment causing harmonic w...

Page 52: ...22 Check any objects that obstruct the air flow route Check clogged Heat Exchanger Is the Valve open Is capacity of Indoor Unit fitted to Room size Any windows open Or direct sunlight Check connection pipe specified pipe length Pipe diameter Check any loose or removed communication line If there is an abnormal condition correct it by referring to Installation Manual or Data Technical Manual Check ...

Page 53: ...t panel normal Is Fan broken or deformed Is the screw of Fan loose Is there any object which obstruct the Fan rotation Is Main Unit installed in stable condition Is Fan Guard installed normally Check if vibration noise by loose bolt or contact noise of piping is happening Is Compressor locked Check Compressor PARTS INFORMATION 1 2 Water Leaking 1 Erroneous installation 2 Drain hose failure Diagnos...

Page 54: ...d Locked compressor due to clogged dirt or less oil Replace Compressor Replace Compressor Replace Compressor Stops soon after starting up Is there open or loose connection cable Is Gas Pipe Valve open Low Pressure is too low Check if Refrigerant is leaking Recharge Refrigerant Check if Strainer is clogged PARTS INFORMATION 4 If there is no failure the defect of Compressor can be considered Compres...

Page 55: ...CB U V W W304 W305 W303 RED WHITE BLACK Compressor Inverter Compressor Check terminal connection of Compressor loose or incorrect wiring Check connection of Main PCB Loose or incorrect wiring Check winding resistance of each terminal If the resistance value is 0 or infinite replace Compressor If the symptom does not change with above Check 1 2 replace Main PCB Resistance Value 0 88 at 68 F 20 C 02...

Page 56: ...oltage between P and N1 of compressor stopping and operating Terminal Resistance value L2 P P N2 L2 L2 Tester Tester Check the diode If it is abnormal replace ACTIVE FILTER MODULE 360k 0 360k 720k 5 4M approx 5 3M approx 5 8M approx 5 4M approx Active Filter Module Remove connector check the open or short circuit and the diode in the module If the output voltage of compressor operating is less tha...

Page 57: ... 1 2 3 4 5 6 at 68 F 20 C Outdoor unit Electronic Expansion Valve EEV Check connection of connector CN27 Loose connector or open cable Remove connector check each winding resistance of Coil If Resistance value is abnormal replace EEV Remove Connector and check Voltage DC12V If it does not appear replace Main PCB Turn on Power and check operation noise If an abnormal noise does not show replace Mai...

Page 58: ...BU36RSLX 22 8 10 31 9 10 Resistance value AC Thermal protector 239 257 F 115 125 C Pr 1 1 3 2 3 The connector inserting numbers 2 3 at 68 F 20 C at 68 F 20 C 275 293 F 135 145 C Indoor Unit Fan Motor Check each winding resistance of the motor If Resistance value is abnormal replace motor Check each winding resistance of the motor If Resistance value is abnormal replace motor 02 33 Red Black Pink P...

Page 59: ...3 REPLACEMENT PARTS R410A INVERTER Universal Floor Ceiling Large Ceiling type ...

Page 60: ...or Heat sink Fan motor Fan Heat Exchanger Accumulator Compressor 4 way valve Solenoid Thermistor Compressor temp Thermistor Discharge temp VIEW A A Choke coil 03 01 1 REPLACEMENT PARTS For OUTDOOR UNIT 1 1 For AOU18 24 36RLX 1 1 1 PARTS LAYOUT DRAWING ...

Page 61: ...hermistor Heat exchanger temp Coil Expansion valve Expansion valve Check valve Pressure SW AOU18 2 way valve Liquid AOU24 36 3 way valve Liquid 3 way valve Gas 03 02 Thermo Holder Thermistor Outdoor Temp ...

Page 62: ...at exchanger temp Coil Expansion valve BIND Compressor wire Solenoid wire CLAMP BIND Thermistor Discharge temp wire Thermistor Outdoor temp wire Thermistor Compressor temp wire Thermistor Heat exchanger temp wire Coil Expansion valve wire Pressure SW wire Thermistor Heat exchanger temp BIND Thermistor Heat exchanger temp Coil Expansion valve Pressure SW Thermistor Outdoor temp ENLARGED DETAIL ENLA...

Page 63: ...emove the 7 mounting screws Remove the TOP PANEL upward FRONT VIEW REAR VIEW 1 1 3 DISASSEMBLY PROCESS For AOU18 24 36RLX 03 04 Replaceable Component Compressor Accumulator 4 way valve Solenoid Thermistor Compressor temp Thermistor Discharge temp Thermistor Outdoor temp Thermistor Heat exchanger temp Pressure SW Coil Expansion valve ...

Page 64: ...crews Remove the connectors and cords Refer to VIEW C D Remove the INVERTER BOX upward 03 05 G G Remove power supply Connection cord Remove the connectors Remove the connectors C D VIEW C VIEW D Choke coil Terminal REAR VIEW FRONT VIEW INVERTER BOX ...

Page 65: ...ER BOX COVER upward Remove the connector and cords 03 06 Hook 2 places INVERTER BOX COVER E F VIEW E W6 Black W4 Black W200 Red W7 White W8 Black W9 White W5 White CN1 Black Brown Red Twist W6 and W7 4 times or more Twist W4 and W5 2 times or more ...

Page 66: ... 07 BIND W12 P Yellow W13 N1 Blue CN407 CN407 P Yellow N1 Blue Black Red L1 White Twist 4 times or more 2 turn the Wire this way L2 Brown Thermistor Heat sink Remove the connector and cords VIEW F DETAIL ...

Page 67: ...rd 03 08 INVERTER BOX A REAR VIEW LEFT SIDE VIEW 1 3 3 4 4 5 5 6 6 2 Main PCB Remove the 1 mounting screw Remove the Main PCB upward Filter PCB Remove the 2 mounting screws Remove the Filter PCB upward Screw Screw Hook 3 places Hook 2 places Main PCB Filter PCB ...

Page 68: ...g 3 temporarily fix MAIN PCB to INVERTER BOX A After it is temporary fix of MAIN PCB As shown in the Fig 4 7 pull out the wires of MAIN PCB 1 1 4 ASSEMBLY PROCESS of INVERTER UNIT For AOU18 24 36RLX 03 09 Screw 2 places Hook 2 places Fig 1 Fig 3 Fig 2 FILTER PCB INVERTER BOX A W12 Yellow W13 Blue Screw Fig 5 Fig 4 Fig 6 7 Hook 3 places MAIN PCB ...

Page 69: ...wires As shown in Fig 5 pull out the wires and fix them 03 10 W16 Red W17 Black Thermistor Heat sink CN407 W303 Black W304 White W305 Red Fig 4 Fig 5 W12 Yellow W13 Blue W17 Black W16 Red W303 Black W304 White W305 Red Hook 2 places ...

Page 70: ...As shown in Fig 6 pull out the wires As shown in Fig 7 pull out the wires 03 11 Fig 6 Fig 7 W200 Red CN1 CN1 wire with connector W200 Red A DETAIL A HYIC1 Don t come in contact with HYIC1 ...

Page 71: ...As shown in Fig 8 connect wires As shown in Fig 9 connect wires 03 12 Fig 8 Fig 9 CN1 White CN34 Yellow Through this hole TM102 White line TM101 Black line For AOU18 24RLX ...

Page 72: ... shown in Fig 8 connect wires As shown in Fig 9 connect wires 03 13 Fig 8 Fig 9 CN1 White CN34 Yellow Through this hole W21 Orange W22 Orange TM102 White line TM101 Black line PTC Thermistor For AOU36RLX ...

Page 73: ...n the figures set wire with connector and bind it to INVERTER BOX A 03 14 Fig 10 Fig 11 Thermistor Heat sink Hook 3 places Pull out the wire through this opening CN407 W303 Black W304 White W305 Red Through the hole Through the guide Bind wire to INVERTER BOX A ...

Page 74: ... removal Open the INTAKE GRILLE and remove the 3 mounting screws Remove the INTAKE GRILLE INTAKE GRILLE Tapping screw Machine screw Tapping screw 2 REPLACEMENT PARTS For INDOOR UNIT 2 1 PARTS LAYOUT DRAWING For ABU18 24RULX ...

Page 75: ...al Remove the 1 mounting screw Remove the COVER PLATE RIGHT COVER PLATE RIGHT 3 COVER PLATE LEFT removal Remove the 1 mounting screw Remove the COVER PLATE LEFT COVER PLATE LEFT Hook 2 places Hook 2 places Hook 2 places Hook 2 places ...

Page 76: ...03 17 4 CONTROL BOX removal Remove the 4 mounting screw CONTROL BOX CONTROL BOX Do not remove the screws If the stays are removed the CONTROL BOX will fall A VIEW A Pull out the CONTROL BOX CONTROL BOX ...

Page 77: ...03 18 CONTROL BOX COVER Remove the 3 mounting screw Remove the CONTROL BOX COVER 5 CONTROL BOX COVER removal BASE CAUTION Be careful not to pinch the lead wires between the CONTROL BOX and BASE ...

Page 78: ... connector For Display CN17 Remocon CN8 Thermistor Room temp CN7 Thermistor Pipe temp CN11 Stepping motor Left Right CN10 Stepping motor Up Down CN13 Display CN4 Capacitor CN5 FAN MOTOR CN1 Noise Filter PCB Wire with connector For Stepping motor Capacitor Plastic WHITE BLACK RED Detail View BLACK WHITE RED RED WHITE BLACK GREEN WHITE BLACK CONTROLLER PCB Power Supply PCB ...

Page 79: ...ILTER removal Remove the 2 AIR FILTERS INTAKE GRILLE Tapping screw AIR FILTER INTAKE GRILLE 2 places AIR FILTER 2 places 2 2 PARTS LAYOUT DRAWING For ABU36RSLX SIDE COVER A RIGHT SIDE COVER B RIGHT SIDE COVER B LEFT ...

Page 80: ...03 21 2 INTAKE GRILLE removal Remove the 6 mounting screws Remove the 2 INTAKE GRILLES INTAKE GRILLE 2 places 1 2 ...

Page 81: ...nting screws Left side and Right side Remove the SIDE COVER A and B 4 CONTROL BOX removal Remove the 2 mounting screws Pull the CONTROL BOX downward 1 1 2 2 1 1 2 2 1 2 SIDE COVER A LEFT SIDE COVER B LEFT Hook 2 places Hook 3 places CONTROL BOX ...

Page 82: ...ith connector For Power Supply PCB Wire with connector For ACIN BIND Wire with connector For Display Thermistor Pipe temp Thermistor Room temp CN17 Remocon CN8 Thermistor Room temp CN7 Thermistor Pipe temp CN11 Stepping motor Left Right CN10 Stepping motor Up Down CN13 Display CN4 Capacitor CN16 FAN MOTOR CN5 FAN MOTOR CN1 Power Supply PCB Power Supply PCB Capacitor Plastic BLACK WHITE RED RED WHI...

Page 83: ...1116 Suenaga Takatsu ku Kawasaki 213 8502 Japan Apr 2006 Printed in Japan ...

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Fujitsu ABU18RULX, Service Instruction

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