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Fujitsu AB*14LBAJ, Service Instruction

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Fujitsu AB*14LBAJ Service Instruction Download Page 79

Trouble shooting  38

INDOOR UNIT

OUTDOOR UNIT Error Method:

Indicate or Display:

Detective Actuators:

Detective details:

Forecast of  Cause :

Main relay welded error

Outdoor Unit Main PCB Circuit

Main relay

When the signal from the outdoor unit is input after 2min.20sec. from the

time of operation stop under the Main relay is OFF condition.

1. Main relay                 2. Main PCB failure

02-41

Check Point 1 : Replace Main PCB

Change Main PCB.

Refer to error code table.

Summary of Contents for AB*14LBAJ

Page 1: ... AR F22LALU AO 18LMAK2 AO 24LMAM2 AO 30LMAW4 SERVICE INSTRUCTION R410A AU 12LBAB AU 14LBAB AU 18LBAB AU F09LAL AU F12LAL AU F14LAL AU F18LAL AS 18LBAJ AS 24LBAJ AS 7LMACW AS 9LMACW AS 12LMACW AS A07LACM AS A09LACM AS A12LACM AS A14LACM AS A18LACM AG F09LAC AG F12LAC AG F14LAC SPLIT TYPE ROOM AIR CONDITIONER INVERTER MULTI Universal Floor Ceiling Duct Cassette Wall Mounted Floor type ...

Page 2: ...ON 01 01 01 01 01 02 01 11 01 12 01 21 01 22 01 26 01 26 01 26 01 26 01 27 01 27 01 27 01 28 01 29 17 COIL DRY OPERATION CONTROL 01 28 01 32 01 32 01 33 01 27 2 1 2 OUTDOOR UNIT DISPLAY 2 1 1 INDOOR 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 01 02 06 2 1 3 WIRED REMOTE CONTROL...

Page 3: ...1 DESCRIPTION OF EACH CONTROL OPERATION R410A INVERTER MULTI Universal Floor Ceiling Duct Cassette Wall Mounted Floor type ...

Page 4: ...t s operarion mode the operation mode is selected in accordance with the table below Table 1 1 Operation mode selection table 1 Room temperature TR Operation mode TR Ts 2 degC Ts 2 degC TR Ts 2 degC TR Ts 2 degC Cooling Monitoring Heating Ts Setting temperature TR Room temperature Table 1 2 Operation mode selection table for AS 18 24LBAJ Room temperature TR Operation mode TR Ts 2 5 degC Ts 2 5 deg...

Page 5: ... Me Lo S Lo Operation mode Air flow mode Speed rpm Hi 750 680 610 550 Me Lo S Lo Operation mode Air flow mode Speed rpm Hi 1000 860 720 570 Me Lo S Lo Operation mode Air flow mode Speed rpm Hi 1040 890 750 595 Me Lo S Lo AR 9LUAB AR 14LUAD Cooling Heating Operation mode Air flow mode Speed rpm Hi 1270 1050 800 595 Me Lo S Lo AR 22LUAD AR 12LUAD AR 18LUAD Cooling Heating Cooling Heating Cooling Hea...

Page 6: ...o Quiet S Lo AR F22LALU Cooling Heating Operation mode Air flow mode Speed rpm Hi 1040 950 840 700 450 Me Lo Quiet S Lo AR F18LALU AR F12LALU Operation mode Air flow mode Speed rpm Hi 660 580 520 460 Me Lo Dry Monitoring Quiet Hi Me Lo Quiet 650 580 Me 620 520 460 460 300 Auto S Lo Cooling Fan Heating Operation mode Air flow mode Speed rpm Hi 590 540 490 440 Me Lo Dry Monitoring Quiet Hi Me Lo Qui...

Page 7: ... Fan Quiet Quiet Hi 1120 1070 1000 930 500 1100 1030 970 Me Lo Heating AS 7LMACW S Lo 1 4 5 6 3 2 1 4 5 6 3 2 Operation mode Air flow mode Speed rpm Louver position Louver position Hi 1200 1100 1000 940 940 500 Me Lo Cooling Fan Quiet Quiet Hi 1200 1100 1000 900 500 1150 1050 960 Me Lo Heating AS 9LMACW S Lo 1 4 5 6 3 2 Operation mode Air flow mode Speed rpm Louver position Louver position Hi 1310...

Page 8: ...ting AS A09LACM Operation mode Air flow mode Speed rpm Hi 1280 1100 900 750 Me Lo Dry Monitoring Quiet Hi Me Me Lo Quiet 1320 1180 1080 860 750 480 Auto S Lo Cooling Fan Heating AS A12LACM Operation mode Air flow mode Speed rpm Hi 1480 1250 1050 850 Me Lo Dry Monitoring Quiet Hi Me Me Lo Quiet 1480 1250 1100 950 850 480 Auto S Lo Cooling Fan Heating AS A14LACM Operation mode Air flow mode Speed rp...

Page 9: ...er Upper Lower Upper Lower Upper Lower Upper Lower Upper Lower Upper Lower Upper Lower Upper Lower Upper Lower Upper Lower AG F14LAC Operation mode Air flow mode Speed rpm Hi 1330 1120 1370 1100 930 1160 660 560 680 890 750 960 660 560 750 570 480 1330 1120 1370 1140 970 1180 940 800 1020 660 560 750 660 560 680 Me Lo Heating Quiet Hi Me Lo Quiet Cool air prevention S Lo S Lo Cooling Fan Upper Low...

Page 10: ... HIGH as shown in Table 2 47 C 41 C 42 C Indoor heat exchanger temperature Fig 2 Airflow change over Heating AUTO Hold Go down one step Go up one step Switch the airflow AUTO and the indoor fan motor will run according to a room temperature as shown in Figure 1 On the other hand if switched in HIGH QUIET the indoor motor will run at a constant airflow of COOL operation modes QUIET LOW MED HIGH as ...

Page 11: ...sor does not operate the indoor fan motor operates S Lo mode Fig 5 Cool Air Prevention Control Hi setting Hi Me Lo Cool air prevention 39 C 37 C 37 C 32 C 24 C 39 C 32 C Indoor heat exchanger temperature Indoor heat exchanger temperature The other of Hi setting Hi setting The other of Hi setting S Lo Lo Qu Cool air prevention 37 C 30 C 34 C 24 C Setting FAN mode S Lo When the compressor operates t...

Page 12: ... LOW QUIET E zone D zone C zone B zone A zone Fan speed mode ZONE AUTO AUTO S Lo OFF OFF OFF OFF OFF S Lo S Lo S Lo S Lo Me Lo Lo Lo Setting Fan Speed 5 5 For AS A Type 47 C 30 C 34 C Indoor heat exchanger temperature Indoor heat exchanger temperature When the compressor operates the maximum value of the indoor fan speed is set as shown in Figure 8 based on the detected temperature by the indoor h...

Page 13: ...er sensor on heating mode When the compressor does not operate the indoor fan motor operates S Lo mode Fig 9 Cool Air Prevention Control Hi setting Hi Me Lo Cool air prevention 39 C 37 C 34 C 29 C 24 C 39 C 29 C Indoor heat exchanger temperature Indoor heat exchanger temperature The other of Hi setting S Lo Lo Qu Cool air prevention 37 C 30 C 31 C 24 C Setting FAN mode S Lo During the dry mode ope...

Page 14: ...an speed switches to 780rpm on heating mode For AO 30LMAW4 It runs at 500rpm for 20 seconds after starting up the outdoor fan When the outdoor heat exchanger tenperature is lower than 2 C the fan speed switches to 780rpm on heating mode Table 3 Fan speed of the outdoor unit 780 420 rpm 820 780 400 300 200 rpm 850 780 400 300 200 rpm 780 420 rpm Cooling Heating AO 18LMAK2 AO 30LMAW4 AO 24LMAM2 ...

Page 15: ... When the swing signal is received from the remote controller the vertical louver starts to swing The range of swing depends on the set airflow direction Swinging Range 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 12 1 2 3 4 The indoor fan motor starts after the louver reaches to the setting position At t...

Page 16: ...ler the vertical 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 13 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 i...

Page 17: ...Direction Range Operation Range 2 1 SWING 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 14 Stop mode means Operation stop 1 2 3 4 5 1 2 3 3 4 ...

Page 18: ...Heating mode Downward flow During AUTO mode operation for the first minute after beginning operation airflow will be horizontal the air direction cannot be adjusted during this period Cooling mode Dry mode Fan mode Heating mode Fan mode Function Range Air Direction Range Operation Range 1 2 SWING OPERATION When the swing signal is received from the remote controller the vertical louver starts to s...

Page 19: ...ing mode Downward flow During AUTO mode operation for the first minute after beginning operation airflow will be horizontal the air direction cannot be adjusted during this period Function Range Air Direction Range Operation Range 1 2 SWING OPERATION 01 16 5 4 Wall Mounted AS 18 24L type When the swing signal is received from the remote controller the vertical louver starts to swing The range of s...

Page 20: ...e Air Direction Range Operation Range 2 1 SWING 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 Stop mode means Operation stop 1 2 3 4 5 1 2 3 3 4 ...

Page 21: ...n Louver in the Heating range for long period of time since water vapor many condense near the outlet louvers and drop of water may drip from the air conditioner During the Cooling and Dry modes if the Air Flow Direction Louvers are left in the hating range for more than 30 minutes they will automatically return to position During Monitor operation in AUTO CHANGEOVER mode the airflow direction aut...

Page 22: ... SWING OPERATION When the swing signal is received from the remote controller the vertical 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 1 2 3 4 Stop mode means Operation stop During Cooling Dry mode Fan mode During Heating mode Du...

Page 23: ...erature of the air being blown out is low at the start of heating operation or during defrosting the airflow direction temporarily becomes to prevent cold air being blown onto the body During Monitor operation in AUTO CHANGEOVER mode the airflow direction automatically becomes and it cannot be adjusted Function and Operation Range Air Direction Range When the swing signal is received from the remo...

Page 24: ... Operation Frequency Range 2 OPERATION FREQUENCY CONTROL AT START UP 2 1 For AO 18L 24L The compressor frequency soon after the start up is controlled as shown in Figure 10 1 Fig 10 1 Compressor Control at Start up 56Hz 56Hz 40Hz 46sec 60sec 80sec 160sec 80Hz Hold 2 2 For AO 30LMAW4 The compressor frequency soon after the start up is controlled as shown in Figure 10 2 Fig 10 2 Compressor Control a...

Page 25: ...AU AU F AS AS A AB F AG F type 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 SLEE...

Page 26: ...n the cooling operation mode When the sleep timer is set the setting temperature is increased 1 degC It increases the setting temperature another 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 1degC 2degC 2degC 1degC 4degC 3degC Set 60min In the heating operation mode When the sleep timer is set the setting tempera...

Page 27: ...se 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 ti...

Page 28: ...ally after the set 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 Se...

Page 29: ...ration lamp and timer lamp of the air conditioner body twinkle simultaneously Set the test operation mode and the compressor will continue to run regardless of whether the room temperature sensor detects The test operation mode is released if 60 minutes have passed after setting up the test operation With Wireless Remote Controller Under the condition where the air conditioner stops press the MAST...

Page 30: ... Release temperature 3 C 7 C 0 C 4 C OPERATION MODE Auto changeover FAN CONT MODE Auto TIMER MODE Continuous No timer setting available SETTING TEMP 23 C or 24 C SETTING LOUVER Standard SWING OFF The fan motor for Fresh Air is operated in synchronization with the indoor fan operation as shown in Figure 11 15 FRESH AIR CONTROL For AR type Fig 11 Fresh air control Operation Stop Operation Stop Fan m...

Page 31: ...eater OFF Ts 10 C Ts 1 C Ts 3 C Ts 12 C When the compressor stop External electrical heater is OFF 17 COIL DRY OPERATION CONTROL For AS A AG F type The coil dry operation functions by pressing COIL DRY button on the remote controller The coil dry operation is consisted of 3 cycles of Fan operation 3 minutes Heating operation 2 minutes and Fan operates for 3 minutes at last before ending the air co...

Page 32: ... integrating operation 40min and over 8 C Does not operate 1 It means contiguous operation time 1 1 For AO 18LMAK2 24LMAM2 2 1 For AO 18LMAK2 24LMAM2 Defrost operation is released when the conditions become as shown in Table 8 2 Table 8 2 Defrost Release Condition Release Condition Outdoor heat exchanger temperature sensor value is higher than 12 C or Compressor operation time has passed 15 minute...

Page 33: ...Outdoor fan motor OFF 28 sec later 4 way valve OFF 34 sec later compressor ON Frequency 95 Hz Heating operation start Compressor ON Defrost Indicator Operation lamp 9 sec ON 1 sec OFF Outdoor heat exchanger temperature Over 10 C or Compressor ON time Over 15 minutes Defrost end 01 30 Compressor integrating operation 40 minutes and over Outdoor heat exchanger temperarure Below 8 C Defrost start ...

Page 34: ...way valve OFF 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 12 C or Compressor ON time Over 15 minutes Defrost end 01 31 Compressor integrating operation 45 minutes and over Outdoor heat exchanger temperarure Below 10 C Outdoor heat exchanger temperarure Below 8 C Outdoor ...

Page 35: ...tarts the drain pump starts simultaneously 2 The drain pump operates continuously for 3 minutes after the compressor is turned off 3 When the compressor stops by the Indoor heat exchanger de icing function the drain pump is turned off in 1 hour after the compressor stops 4 When the water level in the drain pan rises up and then the float switch functions The compressor indoor and outdoor fan motor...

Page 36: ...r operates 2 CURRENT RELEASE CONTROL 01 33 The compressor frequency is controlled so that the outdoor unit input current does not exceeds the current limit velue 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 3 ANTI FREEZING CONTROL Cooling mode The comp...

Page 37: ...g mode the compressor frequency is controlled as following based on the detection value of the indoor heat exchanger temperature sensor Fig 14 Heating Overload Protection Control 63 C 54 C 50 C 56 C 52 C Temperature AO 18LMAK2 AO 24LMAM2 AO 30LMAW4 Temperature Compressor is OFF The compressor frequency is decreased 10Hz every 60 seconds Compressor OFF Release of protection Compressor ON The compre...

Page 38: ...2 TROUBLE SHOOTING R410A INVERTER MULTI Universal Floor Ceiling Duct Cassette Wall Mounted Floor type ...

Page 39: ...Green lamp Red lamp Green lamp Red lamp Green lamp Red lamp Green lamp Red lamp Green lamp 2 times Red lamp Green lamp 3 times Red lamp Green lamp 2 times Red lamp Green lamp 4 times Red lamp Green lamp 2 times Red lamp Green lamp 3 times Red lamp Green lamp 2 times Red lamp Green lamp 3 times Red lamp Green lamp 2 times Red lamp Green lamp 4 times Red lamp Green lamp 6 times Red lamp Green lamp 8...

Page 40: ...tdoor heat exchanger temperature thermistor error Outdoor discharge pipe temperature thermistor error Compressor rotor location cannot detect permanent stop Compressor temperature thermistor error Outdoor temperature thermistor error 3 way valve temperature thermistor error Communication error Serial reverse transfer error Outdoor communication signal error Forward transfer signal error Indoor fan...

Page 41: ...Trouble shooting Room temperature thermistor error 2 1 3 11 19 4 12 13 21 22 25 26 34 35 15 30 16 9 23 14 17 18 24 10 5 7 8 For AS A07 18LACM Discharge temperature error Indoor fan motor abnormal Outdoor unit fan motor error Pressure switch error CT error IPM error Compressor rotor location cannot detect permanent stop 8 times Communication error indoor unit remote control 2 times 3 way valve temp...

Page 42: ... 40 30 9 5 7 8 Discharge temperature error Indoor fan lock error Indoor UPPER fan speed error Indoor LOWER fan lock error Indoor LOWER fan speed error Outdoor unit fan motor error CT error IPM error Compressor rotor location cannot detect permanent stop Damper error UPPER LOWER air flow Damper error UPPER air flow Damper error 8 times Communication error indoor unit remote control 2 times 2 times ...

Page 43: ...7 28 19 4 12 13 21 22 25 15 23 14 17 18 24 10 30 32 5 7 8 For AU F09 18LAL AB F14 24LAT Discharge temperature error Indoor fan motor abnormal Outdoor unit fan motor error Pressure switch error CT error Communication error Main PCB Display PCB Communication error Main PCB Display PCB IPM error Compressor rotor location cannot detect permanent stop 4 way valve error Forced auto switch error 8 times ...

Page 44: ... OFF 5 3 times blink OFF OFF OFF 7 4 times blink OFF OFF OFF 5 times blink OFF OFF OFF 5 times blink 5 times blink 5 times blink OFF OFF OFF OFF OFF OFF 6 times blink OFF OFF OFF 6 times blink OFF OFF OFF 12 7 times blink OFF OFF 19 8 times blink OFF OFF 13 9 times blink OFF OFF 10 times blink OFF OFF 23 11 times blink OFF OFF 14 12 times blink OFF OFF 17 13 times blink OFF OFF 20 14 times blink O...

Page 45: ...rt circuited Outdoor heat exchanger temperature thermistor error Outdoor heat exchanger temperature thermistor short circuited Outdoor temperature thermistor open Outdoor temperature thermistor short circuited Outdoor discharge pipe temperature thermistor open Outdoor discharge pipe temperature thermistor short circuited Indoor EEPROM abnormal Model No Indoor fan motor abnormal Outdoor unit fan mo...

Page 46: ... for 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 ...

Page 47: ...OLLER DISPLAY For AR F09 22L Pressure switch error Communication error indoor unit remote control Communication error Main PCB Display PCB Communication error Main PCB Display PCB IPM error CT error Compressor rotor location cannot detect permanent stop Compressor temperature sensor error 1 SELF DIAGNOSIS 1 2 5 6 7 8 10 11 12 13 14 15 17 18 25 31 27 28 Indoor manual auto switch error Exessive high...

Page 48: ... SET TEMPERATURE buttons simultaneously for 3 seconds or more to start the self diagnosis 4 Press the SET TEMPERATURE buttons simultaneously for 3 seconds or more or there is no key input for 60 seconds to stop the display 3 Press the SET TEMPERATURE button to select the error history number SU MOTU WETH FR SA Error code Error history number 0 1 2 3 4 5 6 7 F E d c b A 9 8 Lower Raise ...

Page 49: ...nection 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 Controller PCB is failure Check Remote Control ...

Page 50: ...onnection 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 AC198 264V app...

Page 51: ...re Room Temperature Thermistor 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 open Upon correcting the removed connector or mis wiring r...

Page 52: ... is detected at power 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...

Page 53: ...or 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 power Check Point 2 Remove connector and check Thermistor resistance value Thermistor Characteristics Approx value If Thermistor is either open or shorted replace it and res...

Page 54: ...PCB Circuit Float Switch When Float Switch is ON for more than 3 minutes 1 Float Switch failure 2 Shorted connector wire 3 Controller PCB failure Check operation of float switch any blocking by dust etc Remove Float switch and check ON OFF switching operation by using a meter If Float switch is detective replace it Check loose contact of CN15 shorted wire pinched wire Replace Float switch if the w...

Page 55: ...ection 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 power Check Point 2 Remove connector and check Thermistor resistance value Thermistor Characteristics Approx value If Thermistor is either open or s...

Page 56: ...nning 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 power Check Point 2 Remove connector and check Thermistor resistance value Thermistor Characteristics Approx va...

Page 57: ...ere 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 memory which keeps memorized information even if po...

Page 58: ... off Check if fan is caught dropped off or locked motor If Fan or Bearing 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 When the condition that actual frequency of Indoor Fan is below 1 3 of target frequency is continued more than 56 seconds Or the condition of fan...

Page 59: ...on 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 AC198 264V appears at Outdoor Unit Terminal L N Check if Indicated value swings between AC70V and AC130V at Outdoor Unit Terminal N 3 Check any loose or removed connection line of Indoor ...

Page 60: ...iring reset the power Check Point 2 Remove connector and check Thermistor resistance value Thermistor Characteristics Rough value If Thermistor is either open or shorted replace it and reset the power Check Point 3 Check voltage of Main PCB DC5 0V Make sure circuit diagram of outdoor unit and check terminal voltage at Thermistor DC5 0V If the voltage does not appear replace Main PCB 02 22 THERMIST...

Page 61: ...or Unit Main PCB 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 ...

Page 62: ...on 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 18 If the Fan Motor is locked replace it If the Fan ...

Page 63: ...paratus 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 Whe...

Page 64: ...ilter 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 ...

Page 65: ... 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 compressor stops...

Page 66: ...e 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 stops A...

Page 67: ...he power Check Point 2 Remove connector and check Thermistor resistance value Thermistor Characteristics Approx value If Thermistor is either open or shorted replace it and reset the power Check Point 3 Check voltage of Main PCB DC5 0V Make sure circuit diagram of outdoor unit and check terminal voltage at Thermistor DC5 0V If the voltage does not appear replace Main PCB 02 29 THERMISTOR DISCHARGE...

Page 68: ...he 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 if connector is removed Check erroneous connection C...

Page 69: ...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 Thermistor is either open or shorted replace it and reset the power Check Point 3 Check voltage of Main PCB DC5 0V Make sure circuit diagram of outdoor unit an...

Page 70: ...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 Thermistor is either open or shorted replace it and reset the power Check Point 3 Check voltage of Main PCB DC5 0V Make sure circuit diagram of outdoor unit an...

Page 71: ...ty of the connected indoor units 02 33 If abnormal condition is found correct it by referring to Installation Manual or Data Technical Manual Check Point 2 Replace Main PCB If Check Point 1 do not improve the symptom change Main PCB Trouble shooting 24 INDOOR UNIT OUTDOOR UNIT Error Method Indicate or Display Detective Actuators Detective details Forecast of Cause Main CPU Sub CPU communication er...

Page 72: ...cutive seconds When the Forced auto switch becomes ON for 30 consecutive seconds 1 Forced auto switch failure 2 Controller PCB failure Check Point 1 Check the Forced auto switch Check if Forced auto switch is kept pressed 02 34 Check Point 2 Replace Controller PCB If Check Point 1 do not improve the symptom change Controller PCB Check ON OFF switching operation by using a meter If Forced auto swit...

Page 73: ...eck 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 Point 2 Check Connection 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 ...

Page 74: ...t 1 2 Check external cause such as noise Check 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 Point 2 Check Connection Check connection between Main PCB and Display PCB If there is loose connector or open cable Check Point 3 Replace Display PCB If Ch...

Page 75: ...nt 1 2 Check external cause such as noise Check 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 Point 2 Check Connection Check connection between Main PCB and Display PCB If there is loose connector or open cable Check Point 3 Replace Display PCB If C...

Page 76: ...eat Exchanger Is the Fan rotating Check by hand and if it is locked replace the motor Check Outdoor Fan Motor If the Fan Motor is defective replace it Check Point 4 Check Discharge Thermistor Isn t it fallen off the holder Is there a cable pinched Check characteristics of thermistor Refer to Trouble shooting 8 If defective replace the thermistor Check Point 2 Check EEV and Strainer Are EEV and Str...

Page 77: ... temperature and the location of the valve by the temperature difference If the value location is not proper replace 4 way valve 4 way valve OK OK Check Point 4 Replace Main PCB If Check Point 1 3 do not improve the symptom replace Main PCB Check Point 2 Check thermistor Isn t it fallen off the holder Is there a cable pinched Check characteristics of thermistor If defective replace the thermistor ...

Page 78: ... If Check Point 1 do not improve the symptom change Controller PCB Check Point 2 Replace Controller PCB If Check Point 1 do not improve the symptom change Controller PCB Trouble shooting 35 INDOOR UNIT INDOOR UNIT Error Method Indicate or Display Detective Actuators Detective details Forecast of Cause OK OK Reverse VDD permanence stop protection Electric air clean power supply circuit abnormal Ele...

Page 79: ...ast of Cause Main relay welded error Outdoor Unit Main PCB Circuit Main relay When the signal from the outdoor unit is input after 2min 20sec from the time of operation stop under the Main relay is OFF condition 1 Main relay 2 Main PCB failure 02 41 Check Point 1 Replace Main PCB Change Main PCB Refer to error code table ...

Page 80: ...Point 2 Check Point 2 Check Connector CN18 Wire Check Point 1 Check Limit switch Check Point 4 Replace Controller PCB OK OK OK OK Check operation of limit switch any blocking by dust etc Remove Limit switch and check ON OFF switching operation by using a meter If Limit switch is detective replace it Check loose contact of CN18 shorted wire pinched wire Replace Limit switch if the wire is abnormal ...

Page 81: ...Controller PCB failure Refer to error code table Check Point 2 Check Point 2 Check Connector CN18 Wire Check Point 1 Check Limit switch Check Point 3 Replace Controller PCB OK OK Check operation of limit switch any blocking by dust etc Remove Limit switch and check ON OFF switching operation by using a meter If Limit switch is detective replace it Check loose contact of CN18 shorted wire pinched w...

Page 82: ...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 AC198 264V appears at Indoor Unit Terminal L N Power Supply Check Fuse F101 in Fi...

Page 83: ...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 AC198 264V appears at Outdoor Unit Terminal L N YES YES Check Fuse F2 F4 in Main PCB If Fuse is open check loose termin...

Page 84: ... 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 85: ...30 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 86: ...n 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 Diagnosis method when water is spitting out Is the filter clogged Check Gas Pressure and correct it if there was...

Page 87: ...cked 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 Compression...

Page 88: ...al 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 1 41 at 20 C Resistance Value 0 88 at 20 C 02 50 MAIN PCB W304 W305 W303 RED WHITE BLACK Compressor For...

Page 89: ...ting is less than the output voltage of compressor stopping Active Filter Module is detective Replace Active Filter Module Terminal Resistance value L2 L1 L1 L2 P P Control Box N1 N1 Tester Tester Check the open or short circuit L2 P P N2 L2 L2 Check the diode 0 360k 720k 1 65M 20 360k 20 20 Ref value 1 1 14M Ref value 2 1 01M Ref value 1 761k Ref value 2 Terminal Resistance value Tester Tester 1 ...

Page 90: ... noise If an abnormal noise does not show replace Main PCB 02 52 EXPANSION VALVE COIL A EXPANSION VALVE COIL B CN27 WHITE YELLOW ORANGE BLUE BROWN RED 1 2 3 4 5 6 E V CN27 WHITE YELLOW ORANGE BLUE BROWN RED 1 2 3 4 5 6 E V EXPANSION VALVE COIL A EXPANSION VALVE COIL B EXPANSION VALVE COIL C EXPANSION VALVE COIL D CN27 CN50 CN51 RED WHITE YELLOW ORANGE BLUE BROWN RED BLACK WHITE WHITE WHITE WHITE W...

Page 91: ...Pipe In Pipe Out Check Point 6 Check Strainer When Valve is closed it has a temp difference between Inlet and Outlet If it is open it has no temp difference between Inlet and Outlet Strainer normally does not have temperature difference between inlet and outlet as shown in but if there is a difference as shown in there is a possibility of inside clogged In this case replace Strainer 02 53 ...

Page 92: ...279 8 63 5 8 63 5 8 Resistance value at 20 C AB 24LBAJ Red Pink Pink Violet Violet Blue Red Black White Red Read Wire 291 8 204 8 182 8 78 5 8 78 5 8 Resistance value at 20 C AB 18LBAJ Check Point AR 9LUAB 12 14 18 22LUAD AC Thermal protector Pr VIOLET BLUE PINK RED BLACK WHITE 150 C Check each winding resistance of the motor If Resistance value is abnormal replace motor Red Pink Pink Violet Viole...

Page 93: ...Red Read Wire 427 8 191 8 191 8 92 8 8 92 8 8 Resistance value at 20 C AU 12 14LBAB Pr Check Point AS 18 24LBAJ AC BLUE YELLOW RED BLACK WHITE Thermal protector 140 C Check each winding resistance of the motor If Resistance value is abnormal replace motor Blue Red Blue Black White Red Read Wire 129 8 21 0 8 277 8 Resistance value at 20 C Pr Check Point AS 7 9 12LMACW Check each winding resistance ...

Page 94: ...AM2 Red Blue Red Black White Red Read Wire 8 96 3 54 7 8 185 8 Resistance value AC Thermal protector Pr BLUE RED BLACK WHITE 150 C at 20 C Outdoor Unit Fan Motor Check each winding resistance of the motor If Resistance value is abnormal replace motor 02 56 ...

Page 95: ...3 REPLACEMENT PARTS R410A INVERTER MULTI Universal Floor Ceiling Duct Cassette Wall Mounted Floor type ...

Page 96: ...ve temp Thermistor 3 way valve temp 1 REPLACEMENT PARTS For OUTDOOR UNIT 1 1 For AO 18LMAK2 24LMAM2 1 1 1 PARTS LAYOUT DRAWING 03 01 Fan motor Fan Heat Exchanger Coil Expansion valve Expansion valve Solenoid Main PCB Active Filter Module Pressure SW Accumulator 4 way valve ...

Page 97: ...Thermistor Heat exchanger temp 2 way valve Liquid 3 way valve Gas 03 02 Thermo Holder Thermistor Outdoor Temp ...

Page 98: ... temp 1 1 2 WIRING For AO 18LMAK2 24LMAM2 03 03 CLAMP Solenoid wire Fan motor wire Fan capacitor wire Compressor wire BIND Thermistor Discharge temp Thermistor 2 3 way valve temp Thermistor Heat exchanger temp Thermistor Outdoor temp PTC Thermistor Coil Expansion valve X2 Pressure SW ...

Page 99: ...rews Remove the TOP PANEL upward 2 CONTROL BOX COVER removal Remove the 3 mounting screws Remove the CONTROL BOX COVER and TERMINAL COVER REAR VIEW 1 1 3 DISASSEMBLY PROCESS For AO 18LMAK2 24LMAM2 03 04 TOP PANEL CONTROL BOX COVER TERMINAL COVER ...

Page 100: ...Outdoor temp Blue Pressure SW Red PTC Thermistor Green Coil Expansion valve Red Coil Expansion valve White Solenoid White Fan motor SCREW Compressor Red White Black Twist 3 times or more Active Filter Module TM104 Yellow TM105 Blue From CN407 Red Black P White N1 Purple L2 White L1 White UNIT A POWER UNIT B 1 1 2 N 2 N L N 3 3 LABEL Wire UNIT A 1 W4 Black UNIT A 2 W5 White UNIT A 3 W8 Red UNIT B 1...

Page 101: ...ng upward 06 06 Hook 2 places Hook 2 places Hook FRONT PANEL VALVE COVER 5 VALVE COVER removal Remove the VALVE COVER Replaceable Component Compressor Accumulator Solenoid Thermistor Discharge temp Thermistor Outdoor temp PTC Thermistor Pressure SW Coil Expansion valve Fan motor Fan ...

Page 102: ...6 RIGHT PANEL removal Remove the 9 mounting screws Remove the RIGHT PANEL by sliding upward 03 07 Hook Hook Hook RIGHT PANEL Replaceable Component Thermistor Heat exchanger temp ...

Page 103: ...Thermistor Heat sink Fan motor Fan Heat Exchanger Accumulator Compressor 4 way valve Solenoid Thermistor Compressor temp Coil Expansion valve Expansion valve VIEW A A Choke coil Receiver tank 1 2 1 PARTS LAYOUT DRAWING 1 2 For AO 30LMAW4 03 08 ...

Page 104: ...Thermistor Heat exchanger temp Pressure SW 2 way valve Liquid 3 way valve Gas 03 09 Thermo Holder Thermistor Outdoor Temp ...

Page 105: ...tor Discharge temp Holder thermistor BINDER M BINDER L RUBBER Discharge temp Thermistor Discharge temp Thermistor Compressor temp Coil Expansion valve wire INS PIPE CONNECT Pressure SW wire Thermistor Outdoor temp RIGHT VIEW BACK VIEW BIND 5 wires BINDER M Thermistor 2 way valve temp x2 Thermistor 3 way valve temp x2 BIND 9 wires BINDER M Thermistor 2 way valve temp x4 Thermistor 3 way valve temp ...

Page 106: ... Remove the TOP PANEL upward FRONT VIEW REAR VIEW 1 2 3 DISASSEMBLY PROCESS For AO 30LMAW4 03 11 Replaceable Component Compressor Accumulator 4 way valve Solenoid Thermistor Compressor temp Thermistor Discharge temp Thermistor Outdoor temp Thermistor Heat exchanger temp Thermistor 2 3 way valve temp Pressure SW Coil Expansion valve Hook 3 places ...

Page 107: ...nd cords Refer to VIEW C D Remove the INVERTER BOX upward 03 12 Remove Connection cord Remove Connection cord Remove Connection cord Remove the connectors Remove the connectors VIEW C VIEW D Choke coil Terminal REAR VIEW FRONT VIEW INVERTER BOX C D UNIT A UNIT C UNIT D UNIT B ...

Page 108: ...the 1 mounting screw Remove the INVERTER BOX COVER upward Remove the connector and cords 03 13 Hook 2 places INVERTER BOX COVER CN1 Black Brown Red W4 Black W5 White Twist W4 and W5 2 times or more E F VIEW E ...

Page 109: ... 14 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 110: ...rd 03 15 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 111: ...Fig 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 2 4 ASSEMBLY PROCESS of INVERTER UNIT For AO 30LMAW4 03 16 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 112: ...wires As shown in Fig 5 pull out the wires and fix them 03 17 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 113: ...As shown in Fig 6 pull out the wires As shown in Fig 7 pull out the wires 03 18 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 114: ...As shown in Fig 8 connect wires As shown in Fig 9 connect wires 03 19 Fig 8 Fig 9 CN1 White CN34 Yellow Through this hole W21 Orange W22 Orange TM102 White line TM101 Black line PTC Thermistor ...

Page 115: ...n the figures set wire with connector and bind it to INVERTER BOX A 03 20 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 116: ...1116 Suenaga Takatsu ku Kawasaki 213 8502 Japan May 2008 Printed in Japan ...

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