Fujitsu AB*14LBAJ Service Instruction

Split type room air conditioner universal floor / ceiling / duct / cassette wall mounted / floor type inverter multi

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Summary of Contents for Fujitsu AB*14LBAJ

Page 1 SPLIT TYPE ROOM AIR CONDITIONER Universal Floor / Ceiling Duct / Cassette Wall Mounted / Floor type INVERTER MULTI SERVICE INSTRUCTION Models Indoor unit Outdoor unit AU*12LBAB AO*18LMAK2 AB*14LBAJ AO*24LMAM2 AB*18LBAJ AU*14LBAB AB*24LBAJ AU*18LBAB AO*30LMAW4 AB*F14LAT AU*F09LAL AB*F18LAT AU*F12LAL AB*F24LAT AU*F14LAL...
Page 2: Table Of Contents
CONTENTS 1. DESCRIPTION OF EACH CONTROL OPERATION 1. CAPACITY CONTROL....................01-01 2. AUTO CHANGEOVER OPERATION................01-01 3. INDOOR FAN CONTROL................... 01-02 4. OUTDOOR FAN CONTROL..................01-11 5. LOUVER CONTROL....................01-12 6. COMPRESSOR CONTROL..................01-21 7. TIMER OPERATION CONTROL................01-22 8. ELECTRONIC EXPANSION VALVE CONTROL............01-26 9.
Page 3: Description Of Each Control Operation
R410A Universal Floor / Ceiling Duct / Cassette Wall Mounted / Floor type INVERTER (MULTI ) 1 . DESCRIPTION OF EACH CONTROL OPERATION...
Page 4: Capacity Control
1. CAPACITY CONTROL 1-1 COOLING, HEATING, DRY CAPACITY CONTROL Compressor frequency decides by capacity of an indoor unit, operation number of an indoor unit, set temperature, room temperature and outside temperature. 2. AUTO CHANGEOVER OPERATION When the air conditioner is set to the AUTO mode by remote control, operation starts in the optimum mode from among the HEATING, COOLING and MONITORING modes.
Page 5: Indoor Fan Control
3. INDOOR FAN CONTROL 1. Fan speed ( Table 2 : Indoor Fan Speed ) AB*14LBAJ AB*18LBAJ Operation mode Air flow mode Speed (rpm) Operation mode Air flow mode Speed (rpm) Cooling Cooling 1030 Heating Heating S-Lo S-Lo AB*24LBAJ Operation mode...
Page 6 AR*F09LALU AR*F12LALU Operation mode Air flow mode Speed (rpm) Operation mode Air flow mode Speed (rpm) 1010 Cooling Cooling Heating Heating Quiet Quiet S-Lo S-Lo AR*F14LALU AR*F18LALU Operation mode Air flow mode Speed (rpm) Operation mode Air flow mode Speed (rpm) 1040 Cooling Cooling...
Page 7 AS*18LBAJ AS*24LBAJ Operation mode Air flow mode Speed (rpm) Operation mode Air flow mode Speed (rpm) 1160 1290 Cooling Cooling Heating 1000 Heating 1100 Quiet Quiet S-Lo S-Lo AS*7LMACW Speed (rpm) Operation mode Air flow mode Louver position Louver position 4 5 6 Cooling 1100...
Page 8 AS*A07LACM AS*A09LACM Operation mode Air flow mode Operation mode Air flow mode Speed (rpm) Speed (rpm) Cooling 1140 Cooling 1220 1000 1060 Quiet Quiet Hi/ Me+ Hi/ Me+ 1140 1220 Heating Heating 1050 1110 1040 Quiet Quiet Auto Auto Monitoring Monitoring S- Lo S- Lo...
Page 9 AG*F09LAC Speed (rpm) Air flow mode Operation mode Upper Upper& Lower air flow mode air flow mode 1120/ 950 1230/ --- (Upper/ Lower) Cooling 960/ 820 1070/ --- (Upper/ Lower) 820/ 700 910/ --- (Upper/ Lower) Quiet 660/ 560 750/ --- (Upper/ Lower) S-Lo 570/ 480...
Page 10 3. COOLING OPERATION 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 shown in Table 2.
Page 11 5. COOL AIR PREVENTION CONTROL (Heating mode) 5-1. For AB/ AR/ AU Type The maximum value of the indoor fan speed is set as shown in Figure 4, based on the detected temperature by the indoor heat exchanger sensor on heating mode. ( Fig.4 : Cool Air Prevention Control ) Indoor heat exchanger Indoor heat exchanger...
Page 12 5-4. For AS Type The maximum value of the indoor fan speed is set as shown in Figure 7-1,7-2, based on the fan speed mode and the detected temperature by the indoor heat exchanger sensor on heating mode. ( Fig.7-1 : Cool Air Prevention Control for AS*7/ 9/ 12LMACW ) Indoor heat exchanger Indoor heat exchanger temperature...
Page 13 5-6. For AG*F Type When the compressor operates, the maximum value of the indoor fan speed is set as shown in Figure 9, based on the detected temperature by the indoor heat exchanger sensor on heating mode. When the compressor does not operate, the indoor fan motor operates [S-Lo] mode. ( Fig.9 : Cool Air Prevention Control ) <...
Page 14: Outdoor Fan Control
4. OUTDOOR FAN CONTROL 1. Outdoor Fan Motor Following table shows the fan speed of the outdoor unit. ( Table 3 : Fan speed of the outdoor unit ) Cooling Heating AO*18LMAK2 780/ 420 rpm 780/ 420 rpm AO*24LMAM2 AO*30LMAW4 850/ 780/ 400/ 300/ 200 rpm 820/ 780/ 400/ 300/ 200 rpm For AO*18LMAK2/ 24LMAM2...
Page 15: Louver Control
5. LOUVER CONTROL 5-1 Compact Cassette (AU) type (Function Range) Each time the button is pressed, the air direction range will change as follows: (Air Direction Range) (Operation Range) Cooling / Dry mode Heating mode Fan mode Use the air direction adjustments within the ranges shown above. The vertical airflow direction is set automatically as shown, in accordance with the type of operation selected.
Page 16 5-2 Universal (AB) type (Function Range) Each time the button is pressed, the air direction range will (Air Direction Range) change as follows: (Operation Range) Cooling / Dry mode Heating mode Fan mode Use the air direction adjustments within the ranges shown above. The vertical airflow direction is set automatically as shown, in accordance with the type of operation selected.
Page 17 (Function Range) Each time the button is pressed, the air direction range will (Air Direction Range) change as follows: (Operation Range) Cooling / Dry mode Heating mode Fan mode Use the air direction adjustments within the ranges shown above. The horizontal airflow direction is set automatically on after initialization.
Page 18 5-3 Wall Mounted (AS*7/ 9/ 12L) type 1. VERTICAL LOUVER CONTROL (Function Range) Each time the button is pressed, the air direction range will change as follow: (Air Direction Range) (Operation Range) Cooling / Dry mode Heating mode The remote control unit's display does not change. Use the air direction adjustments within the ranges shown above.
Page 19 5-4 Wall Mounted (AS*18/ 24L) type 1. VERTICAL LOUVER CONTROL (Function Range) Each time the button is pressed, the air direction range will change as follow: (Air Direction Range) (Operation Range) Cooling / Dry mode Heating mode The remote control unit's display does not change. Direction Only the direction of the Moving Diffuser changes: the direction of the Air Direction Flaps does not change.
Page 20 (Function Range) (Air Direction Range) Each time the button is pressed, the air direction range will change as follows: (Operation Range) Cooling / Dry mode Heating mode Fan mode Use the air direction adjustments within the ranges shown above. The horizontal airflow direction is set automatically on after initialization.
Page 21 5-5 Wall Mounted (AS*A) type 1. VERTICAL LOUVER CONTROL (Function Range) Each time the button is pressed, the air direction range will change as follow: (Air Direction Range) (Operation Range) Cooling / Dry mode Heating mode Fan mode Use the air direction adjustments within the ranges shown above. The vertical airflow direction is set automatically as shown, in accordance with the type of operation selected.
Page 22 5-6 Compact Cassette (AU*F) type (Function Range) Each time the button is pressed, the air direction range will change as follows: (Air Direction Range) (Operation Range) During Cooling/Dry mode/Fan mode : During Heating mode Use the air direction adjustments within the ranges shown above. The vertical airflow direction is set automatically as shown, in accordance with the type of operation selected.
Page 23 5-7 Floor (AG*F) type (Function and Operation Range) Each time the button is pressed, the air direction range will change as follows: (Air Direction Range) Use the air direction adjustments within the ranges shown above. The vertical airflow direction is set automatically as shown, in accordance with the type of operation selected.
Page 24: Compressor Control
6. COMPRESSOR CONTROL 1. OPERATION FREQUENCY RANGE The operation frequency of the compressor is different based on the operation mode as shown in the table 4. (Table 4 : Compressor Operation Frequency Range) Cooling Heating AO*18LMAK2 15Hz 80Hz 15Hz 95Hz AO*24LMAM2 15Hz 80Hz...
Page 25: Timer Operation Control
7. TIMER OPERATION CONTROL 7-1 Wireless Remote Controller ( For AB/ AU/ AU*F/ AS/ AS*A/ AB*F/ AG*F type ) ON / TIMER OFF / TIMER PROGRAM TIMER SLEEP TIMER 1. ON / OFF TIMER OFF timer : When the clock reaches the set time, the air conditioner will be turned off. Operation mode Stop mode Set time of timer...
Page 26 3. SLEEP TIMER If the sleep timer is set, the room temperature is monitored and the operation is stopped automatically. If the operation mode or the set temperature is change after the sleep timer is set, the operation is continued according to the changed setting of the sleep timer from that time ON. In the cooling operation mode When the sleep timer is set, the setting temperature is increased 1 degC.
Page 27 7-2 Wired Remote Controller ( For AR/ AR*F type ) ON / TIMER OFF / TIMER WEEKLY TIMER TEMPERATURE SET BACK TIMER 1. ON / OFF TIMER OFF timer : When the clock reaches the set time, the air conditioner will be turned off. Operation mode Stop mode Set time of timer...
Page 28 2-2. DAY OFF setting The DAY OFF setting is only available for days for which weekly settings already exist. 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. Normal DAY OFF Operation mode...
Page 29: Electronic Expansion Valve Control
8. ELECTRONIC EXPANSION VALVE CONTROL The most proper opening of the electronic expansion valve is calculated and controlled under the present operating condition based on the following values. The compressor frequency, the temperatures detected by the discharge temperature sensor and the outdoor temperature sensor. The pulse range of the electronic expansion valve control is between 30 to 480 pulses.
Page 30: Auto Restart
12. AUTO RESTART 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 memorized operation contents. When the power is interrupted and recovered during timer operation, timer operation is canceled, but only setting time is memorized.
Page 31: External Electrical Heater Control
16. EXTERNAL ELECTRICAL HEATER CONTROL (For AR type) The external electrical heater is operated as shown in Figure 12. (Fig.12 : External electrical heater control) When the room temperature rises Heater : OFF Ts : Setting temperature Ts -1°C Ts -3°C When the compressor stop, Heater : ON External electrical heater is OFF.
Page 32: Defrost Operation Control
18. DEFROST OPERATION CONTROL 1. CONDITION OF STARTING THE DEFROST OPERATION 1-1. For AO*18LMAK2/ 24LMAM2 The defrost operation starts when the outdoor heat exchanger temperature sensor detects the temperature lower than the values shown in Table 7-1. (Table 7-1 : Condition of starting Defrost Operation) Compressor integrating operation :40min and over Compressor integrating...
Page 33 3. Defrost Flow Chart 3-1. For AO*18LMAK2/ 24LMAM2 The defrosting shall proceed by the integrating operation time as follows. Heating operation start : Compressor ON (Not defrosted for 6 or 10 minutes) Compressor integrating operation: 40 minutes and over Outdoor heat exchanger temperarure: Below -8°C Defrost start Defrost Indicator: [Operation lamp]...
Page 34 3-2. AO*30LMAW4 The defrosting shall proceed by the integrating operation time and outdoor heat exchanger temperature as follows. Heating operation start : Compressor ON (Not defrosted for 6 or 10 minutes) Compressor integrating operation: 45 minutes and over Outdoor temp. > -1°C Outdoor temp.
Page 35: Drain Pump Operation
19. DRAIN PUMP OPERATION ( For AU type ) During Cooling / Dry operation 1. When the compressor starts, 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.
Page 36: Various Protections
21. VARIOUS PROTECTIONS 1. DISCHARGE GAS TEMPERATURE OVER RISE PREVENTION CONTROL The discharge gas thermosensor (discharge thermistor : Outdoor side) will detect discharge gas temperature. When the discharge temperature becomes higher than 110°C ,the compressor frequency is decreased 10 Hz, and it continues to decrease the frequency for 10 Hz every 120 seconds until the temperature becomes lower than 110°C When the discharge temperature becomes lower than...
Page 37 4. COOLING PRESSURE OVER RISE PROTECTION When the outdoor unit heat exchange sensor temperature rises to or greater, 70.5°C the compressor is stopped and error display is indicated. 5. HIGH TEMPERATURE RELEASE CONTROL ( HEATING MODE ) On heating mode, the compressor frequency is controlled as following based on the detection value of the indoor heat exchanger temperature sensor.
Page 38: Trouble Shooting
R410A Universal Floor / Ceiling Duct / Cassette Wall Mounted / Floor type INVERTER (MULTI ) 2 . TROUBLE SHOOTING...
Page 39: Error Display
2. TROUBLESHOOTING 2-1 ERROR DISPLAY 2-1-1 INDOOR UNIT DISPLAY 1. ERROR DISPLAY Please refer the blinking pattern as follows. : Fast flashing Operation lamp : Red lamp For AS*7/ 9/ 12LMACW : Slow flashing Timer lamp : Green lamp Large division indication Small division indication Trouble shooting...
Page 40 For AS*18/ 24LBAJ For AB*14L - 24L / AU*12L - 18L The OPERATION, TIMER and SWING lamps operate as follows according to the error contents. Error display Trouble Error contents shooting OPERARION TIMER SWING (RED) (GREEN) (ORANGE) Indoor EEPROM abnormal (Model No.) Room temperature thermistor error 2 times...
Page 41 For AS*A07 - 18LACM The OPERATION, TIMER, AIR CLEAN and COIL DRY lamps operate as follows according to the error contents. Error display Trouble Error contents AIR CLEAN COIL DRY shooting TIMER OPERATION or QUIET (RED) (GREEN) (GREEN) (ORANGE) Communication error 2 times (Serial reverse transfer error) 3 times...
Page 42 For AG*F09 - 14LAC The OPERATION, TIMER and 10°C HEAT lamps operate as follows according to the error contents. Error display Trouble Error contents shooting OPERATION TIMER 10°C HEAT (GREEN) (ORANGE) (GREEN) Communication error 2 times (Serial reverse transfer error) 3 times Outdoor communication signal error 4 times...
Page 43 For AU*F09 - 18LAL AB*F14 - 24LAT The OPERATION, TIMER and FILTER lamps operate as follows according to the error contents. Error display Trouble Error contents shooting OPERATION TIMER FILTER (GREEN) (ORANGE) (RED) Communication error 2 times (Serial reverse transfer error) 3 times Outdoor communication signal error 4 times...
Page 44: Outdoor Unit Display
2-1-2 OUTDOOR UNIT DISPLAY 1. ERROR DISPLAY Trouble Error Contents shooting 1 times blink 1 times blink Outdoor communication signal error (Forward transfer signal error) 1 times blink 1 times blink Outdoor discharge pipe temperature 2 times blink thermistor error Outdoor heat exchanger temperature 3 times blink thermistor error...
Page 45: Wired Remote Controller Display
2-1-3 WIRED REMOTE CONTROLLER DISPLAY (For AR*9L - 22L) 1. SELF - DIAGNOSIS When the error indication "E:EE" is displayed, inspection of the air conditioning system is necessary. Please consult authoilzed servise personnel. Run [Self-Diagnosis] if [E:EE] flashes on the clock display of the remote controller. Display Error code SU MO TU WE TH FR SA...
Page 46 2. ERROR CODE HISTORY DISPLAY Up to 16 memorized error codes may be displayed for the indoor unit connected to the remote controller. 1. Stop the air conditioner operation. 2. Press the SET TEMPERATURE buttons and the START/STOP button simultaneously for 5 seconds or more to start the self-diagnosis.
Page 47 2-1-4 WIRED REMOTE CONTROLLER DISPLAY (For AR*F09 - 22L) 1. SELF - DIAGNOSIS When "EE" in Temperature Display is displayed, inspection of the air conditioning system is necessary. Please consult authoilzed servise personnel. Unit number (usually 0) Error code SU MOTU WETH FR SA ex.
Page 48 2. ERROR CODE HISTORY DISPLAY Up to 16 memorized error codes may be displayed for the indoor unit connected to the remote controller. 1. Stop the air conditioner operation. 2. Press the SET TEMPERATURE buttons simultaneously for 3 seconds or more to start the self-diagnosis. Error code Error history number SU MO TU WE TH FR SA...
Page 49: Trouble Shooting With Error Code
2-2 TROUBLE SHOOTING WITH ERROR CODE Trouble shooting 1 Indicate or Display: INDOOR UNIT Error Method: Communication Error Refer to error code table. (Indoor unit Remote control) Detective details: Detective Actuators: When the indoor unit cannot receive the signal from Wired Remote Indoor unit controller PCB circuit more than 10seconds after power ON, or the indoor unit cannot receive Wired Remote Control...
Page 50 Trouble shooting 2 Indicate or Display: OUTDOOR UNIT Error Method: Communication Error Refer to error code table. (Serial Reverse Transfer Error) Detective details: Detective Actuators: Outdoor Unit Main PCB Circuit When the indoor unit cannot receive the serial signal from Outdoor unit more than 10seconds.
Page 51 Indicate or Display: Trouble shooting 3 INDOOR UNIT Error Method: INDOOR UNIT Refer to error code table. Room Temperature Thermistor Error Detective details: Detective Actuators: Indoor Unit Controller PCB Circuit When Room Temperature Thermistor open or short-circuit is detected at power ON. Room Temperature Thermistor Forecast of Cause : 1.
Page 52 Indicate or Display: Trouble shooting 4 INDOOR UNIT Error Method: INDOOR UNIT Refer to error code table. Indoor Heat Exchanger Temperature Thermistor Error Detective Actuators: Detective details: Indoor Unit Controller PCB Circuit When Heat Exchanger Temperature Thermistor open or short-circuit is detected at power ON.
Page 53 Indicate or Display: Trouble shooting 5 OUTDOOR UNIT Error Method: Refer to error code table. Outdoor Heat Exchanger Temperature Thermistor Error Detective Actuators: Detective details: Outdoor Unit Main PCB Circuit When Heat Exchanger Temperature Thermistor open or short-circuit is Heat Exchanger Temperature Thermistor detected at power ON or while running the compressor.
Page 54 Indicate or Display: Trouble shooting 6 INDOOR UNIT Error Method: Refer to error code table. Water Drain Abnormal Detective Actuators: Detective details: Indoor Unit Controller PCB Circuit When Float Switch is ON for more than 3 minutes. Float Switch Forecast of Cause : 1.
Page 55 Indicate or Display: Trouble shooting 7 OUTDOOR UNIT Error Method: INDOOR UNIT Refer to error code table. Outdoor Temperature Thermistor Error Detective Actuators: Detective details: Outdoor Unit Main PCB Circuit When Outdoor Temperature Thermistor open or short-circuit is detected at power ON or while running the compressor. Outdoor Temperature Thermistor Forecast of Cause : 1.
Page 56 Indicate or Display: Trouble shooting 8 OUTDOOR UNIT Error Method: INDOOR UNIT Refer to error code table. Outdoor Discharge Pipe Temperature Thermistor Error Detective details: Detective Actuators: When Discharge Pipe Temperature Thermistor open or short-circuit Outdoor Unit Main PCB Circuit is detected at power ON or while running the compressor.
Page 57 Trouble shooting 9 Indicate or Display: Indicate or Display: INDOOR UNIT Error Method: Refer to error code table. Indoor EEPROM abnormal (Model No.) Detective details: Detective Actuators: Indoor Unit Controller PCB circuit When the model information being read from EEPROM has an apparent error.
Page 58 Indicate or Display: Trouble shooting 10 INDOOR UNIT Error Method: Refer to error code table. Indoor Fan Motor abnormal Detective Actuators: Detective details: Indoor Unit Controller PCB Circuit When the condition that actual frequency of Indoor Fan is below 1/3 Indoor Fan Motor of target frequency is continued more than 56 seconds.
Page 59 Indicate or Display: Trouble shooting 11 Indicate or Display: INDOOR UNIT Error Method: Refer to error code table. Outdoor Communication Signal Error (Forward Transfer Signal Error) Detective details: Detective Actuators: Indoor Unit Controller PCB Circuit When the outdoor unit cannot receive the serial signal from Indoor unit more than 10seconds.
Page 60 For AO*30LMAW4 Indicate or Display: Trouble shooting 12 OUTDOOR UNIT Error Method: Refer to error code table. Compressor Temperature Thermistor Error Detective Actuators: Detective details: When Compressor Temperature Thermistor open or short-circuit is Outdoor Unit Main PCB Circuit detected at power ON or while running the compressor. Compressor Temperature Thermistor Forecast of Cause : 1.
Page 61 Indicate or Display: Trouble shooting 13 OUTDOOR UNIT Error Method: INDOOR UNIT Refer to error code table. Pressure Switch Error Detective details: Detective Actuators: When pressure switch open is detected in 10 seconds Outdoor Unit Main PCB Circuit after the power is turned on. Pressure Switch Forecast of Cause : 1.
Page 62 Indicate or Display: Trouble shooting 14 OUTDOOR UNIT Error Method: Refer to error code table. IPM error Detective details: Detective Actuators: When more than normal operating current to IPM in Main PCB flows, Outdoor Unit Main PCB Circuit the compressor stops. Compressor After the compressor restarts, if the same operation is repeated within 40sec, the compressor stops again.
Page 63 Indicate or Display: Trouble shooting 15 OUTDOOR UNIT Error Method: Refer to error code table. CT error Detective details: Detective Actuators: Outdoor Unit Main PCB Circuit When Input Current Sensor has detected lower than 0.5A Outdoor Unit Filter PCB Circuit while Inverter Compressor is operating at higher than 56Hz, (Input current sensor unit) after 1minute upon starting the Compressor.
Page 64 Indicate or Display: Trouble shooting 16 OUTDOOR UNIT Error Method: INDOOR UNIT Refer to error code table. Active Filter Module (AFM) error Detective details: Detective Actuators: Outdoor Unit Main PCB Circuit When inverter input DC voltage is higher than 467V or Active Filter Module lower than 237V.
Page 65 Indicate or Display: Trouble shooting 17 OUTDOOR UNIT Error Method: Refer to error code table. Compressor rotor location cannot detect (Permanent Stop) Detective details: Detective Actuators: While running the compressor, if the detected rotor location is out of Outdoor Unit Main PCB Circuit phase with actual rotor location more than 90 degrees, the compressor stops.
Page 66 For AO*30LMAW4 Indicate or Display: Trouble shooting 18 OUTDOOR UNIT Error Method: Refer to error code table. Outdoor Unit Fan Motor Error Detective Actuators: Detective details: When outdoor fan rotation speed is less than 100rpm in 20 seconds Outdoor Unit Main PCB Circuit after fan motor starts, fan motor stops.
Page 67 Indicate or Display: Trouble shooting 19 OUTDOOR UNIT Error Method: Refer to error code table. Heat Sink Temperature Thermistor Error Detective details: Detective Actuators: When Heat Sink Temperature Thermistor open or short-circuit is Outdoor Unit Main PCB Circuit detected at power ON or while running the compressor. Heat Sink Temperature Thermistor Forecast of Cause : 1.
Page 68 Indicate or Display: Trouble shooting 20 OUTDOOR UNIT Error Method: Refer to error code table. Compressor Start-up error (Permanent Stop) Detective Actuators: Detective details: On start-up the compressor, when detected rotor position is out of phase Outdoor Unit Main PCB Circuit with actual rotor position more than 90 degrees,the compressor stops.
Page 69 Indicate or Display: Trouble shooting 21 OUTDOOR UNIT Error Method: Refer to error code table. 2-way valve Temperature Thermistor Error Detective details: Detective Actuators: Outdoor Unit Main PCB Circuit When 2-way valve Temperature Thermistor open or short-circuit is detected at power ON or while running the compressor. 2-way valve Temperature Thermistor Forecast of Cause : 1.
Page 70 Indicate or Display: Trouble shooting 22 OUTDOOR UNIT Error Method: 3-way valve Temperature Refer to error code table. Thermistor Error Detective details: Detective Actuators: When 3-way valve Temperature Thermistor open or short-circuit is Outdoor Unit Main PCB Circuit detected at power ON or while running the compressor. 3-way valve Temperature Thermistor Forecast of Cause : 1.
Page 71 Indicate or Display: Trouble shooting 23 OUTDOOR UNIT Error Method: INDOOR UNIT Refer to error code table. Connected Indoor unit error Detective Actuators: Detective details: Outdoor Unit Main PCB Circuit When the total capacity of the connected indoor units exceed the connectable range of the total capacity.
Page 72 Indicate or Display: Trouble shooting 25 INDOOR UNIT Error Method: INDOOR UNIT Refer to error code table. Forced auto switch error Detective Actuators: Detective details: Indoor Unit Controller PCB Circuit When the Forced auto switch becomes ON for 10 consecutive seconds. Forced auto switch For AB*F/ AU*F/ AG*F When the Forced auto switch becomes ON for 30 consecutive seconds.
Page 73 Indicate or Display: Trouble shooting 26 INDOOR UNIT Error Method: INDOOR UNIT Refer to error code table. Power supply frequency detection error Detective Actuators: Detective details: Indoor Unit Controller PCB Circuit The power supply frequency cannot be recognized after 4sec of power ON. Forecast of Cause : 1.
Page 74 Indicate or Display: Indicate or Display: Trouble shooting 27 INDOOR UNIT Error Method: Refer to error code table. Communication Error (Main PCB ---> Display PCB) Detective details: Detective Actuators: When the Display PCB cannot receive the signal from the Main PCB. Indoor Unit Main PCB Circuit Display PCB Forecast of Cause:...
Page 75 Indicate or Display: Indicate or Display: Trouble shooting 28 OUTDOOR UNIT Error Method: Refer to error code table. Communication Error (Main PCB <--- Display PCB) Detective details: Detective Actuators: When the Main PCB cannot receive the signal from the Display PCB. Indoor Unit Main PCB Circuit Display PCB Forecast of Cause:...
Page 76 Indicate or Display: Trouble shooting 30 OUTDOOR UNIT Error Method: INDOOR UNIT Refer to error code table. Discharge temperature error Detective details: Detective Actuators: When the discharge temperature becomes higher than 110°C, Outdoor Unit Main PCB Circuit the compressor stops. Discharge Pipe Temperature Thermistor Forecast of Cause : 1.
Page 77 Indicate or Display: Trouble shooting 32 OUTDOOR UNIT Error Method: Refer to error code table. 4-way valve error Detective Actuators: Detective details: When the indoor heat exchanger temperature is compared with Indoor Unit Controller PCB Circuit the room temperature, and either following condition is detected Heat Exchanger Temperature Thermistor continuously two times, the compressor stops.
Page 78 Indicate or Display: Trouble shooting 34 INDOOR UNIT Error Method: INDOOR UNIT Refer to error code table. VDD permanence stop protection (Electric air clean) Detective Actuators: Detective details: Electric air clean unit When the air cleanness monitor trial protection operates 4 times. Indoor Unit Controller PCB Circuit Forecast of Cause : 1.
Page 79 Indicate or Display: Trouble shooting 38 OUTDOOR UNIT Error Method: INDOOR UNIT Refer to error code table. Main relay welded error Detective Actuators: Detective details: When the signal from the outdoor unit is input after 2min.20sec. from the Outdoor Unit Main PCB Circuit time of operation stop under the Main relay is OFF condition.
Page 80 Indicate or Display: Trouble shooting 39 INDOOR UNIT Error Method: INDOOR UNIT Refer to error code table. Damper error (Upper & Lower air flow) (Upper air flow) Detective Actuators: Detective details: When damper opening recovery operation repeats 6 times. Indoor unit Controller PCB Circuit Limit switch Damper Forecast of Cause :...
Page 81 Indicate or Display: Trouble shooting 40 INDOOR UNIT Error Method: INDOOR UNIT Refer to error code table. Damper error Detective Actuators: Detective details: When close detecting sw and open detecting sw operates simultaneously. Indoor unit Controller PCB Circuit Limit switch Forecast of Cause : 1.
Page 82: Trouble Shooting With No Error Code
2-3 TROUBLE SHOOTING WITH NO ERROR CODE Forecast of Cause: Trouble shooting 41 1. Power Supply failure 2. External cause Indoor Unit - No Power 3. Electrical Components defective Check Point 1 : Check Installation Condition Isn’t the breaker down? Check loose or removed connection cable.
Page 83 Forecast of Cause: Trouble shooting 42 1. Power Supply failure 2. External cause Outdoor Unit - No Power 3. Electrical Components defective Check Point 1 : Check Installation Condition Isn’t the breaker down? Check loose or removed connection cable. >>If abnormal condition is found, correct it by referring to Installation Manual or Data &...
Page 84 Forecast of Cause: Trouble shooting 43 1. Setting/ Connection failure 2. External cause No Operation (Power is ON) 3. Electrical Component defective Check Point 1 : Check indoor and outdoor installation condition Indoor Unit - Check incorrect wiring between Indoor Unit - Remote Control, or terminals between Indoor Units. Or, check if there is an open cable connection.
Page 85 Forecast of Cause: Trouble shooting 44 1. Indoor Unit error 2. Outdoor Unit error No Cooling / No Heating 3. Effect by Surrounding environment 4. Connection Pipe / Connection Wire failure 5. Refrigeration cycle failure Check Point 1 : Check Indoor Unit Does Indoor Unit FAN run on HIGH FAN? Is Air Filter dirty? Is Heat Exchanger clogged?
Page 86 Forecast of Cause : Trouble shooting 45 1. Abnormal installation(Indoor/ Outdoor) 2. Fan failure(Indoor/ Outdoor) Abnormal Noise 3. Compressor failure (Outdoor) Diagnosis method when Abnormal Noise is occurred Abnormal noise is coming from Indoor Unit. Abnormal noise is coming from Outdoor Unit. (Check and correct followings) (Check and correct followings) Is Main Unit installed in stable condition?
Page 87: Service Parts Information
2-4 SERVICE PARTS INFORMATION SERVICE PARTS INFORMATION 1 Compressor Diagnosis method of Compressor ( If Outdoor Unit LED displays Error, refer to Trouble shooting ) Abnormal noise Stops soon after starting up Does not start up Check if vibration noise by Is there open or loose connection Is there open or loose connection loose bolt or contact noise...
Page 88 SERVICE PARTS INFORMATION 2 Inverter Compressor Check Point 1 : Check Connection Check terminal connection of Compressor Check connection of Main PCB (loose or incorrect wiring) (Loose or incorrect wiring) Terminal cover opened (RED) (RED) W304 MAIN PCB W305 W303 (WHITE) (WHITE) (BLACK)
Page 89 SERVICE PARTS INFORMATION 3 Active Filter Module Check Point 1 : Check Open or Short-circuit and Diode (D1) Remove connector, check the open or short-circuit and the diode in the module Check the open or short-circuit Terminal Resistance value Tester(+) Tester(-) 360k 720k...
Page 90 SERVICE PARTS INFORMATION 4 Outdoor unit Electronic Expansion Valve ( EEV ) Check Point 1 : Check Connections Check connection of connector ( Loose connector or open cable ) For AO*18LMAK2 / AO*24LMAM2 For AO*30LMAW4 EXPANSION EXPANSION VALVE COIL A VALVE COIL A BROWN BROWN...
Page 91 Check Point 5 : Check Opening and Closing Operation of Valve When Valve is closed, If it is open, it has no temp. difference between Inlet and Outlet. it has a temp. difference between Inlet and Outlet. CLOSE OPEN Example : Hot Gas Example : Hot Gas Pipe (In) Pipe (In)
Page 92 SERVICE PARTS INFORMATION 5 Indoor Unit Fan Motor Check Point : AB*14/ 18/ 24LBAJ Check each winding resistance of the motor If Resistance value is abnormal, replace motor. AB*14LBAJ BLUE Read Wire Resistance value VIOLET White Red PINK Black Thermal protector 140°C...
Page 93 Check Point : AU*12/ 14/ 18LBAB Check each winding resistance of the motor If Resistance value is abnormal, replace motor. BLUE VIOLET PINK BLACK (AC) YELLOW Thermal protector WHITE 140°C AU*12/ 14LBAB AU*18LBAB Read Wire Resistance value Read Wire Resistance value White Red White Red 10.7...
Page 94 SERVICE PARTS INFORMATION 6 Outdoor Unit Fan Motor Check Point : AO*18LMAK2/ 24LMAM2 Check each winding resistance of the motor If Resistance value is abnormal, replace motor. BLUE Read Wire Resistance value Thermal protector 150°C 54.7 White - Red Red - Black 96.3 (AC) BLACK...
Page 95: Replacement Parts ( For Outdoor Unit )
R410A Universal Floor / Ceiling Duct / Cassette Wall Mounted / Floor type INVERTER (MULTI ) 3 . REPLACEMENT PARTS...
Page 96: For Ao*18Lmak2/ 24Lmam2
1. REPLACEMENT PARTS (For OUTDOOR UNIT) 1-1 For AO*18LMAK2/ 24LMAM2 1-1-1 PARTS LAYOUT DRAWING Active Filter Module Main PCB Heat Exchanger Solenoid PTC Thermistor 4-way valve Accumulator Fan motor Thermistor (2-way valve temp.) Thermistor (3-way valve temp.) Pressure SW Thermistor (Discharge temp.) Coil (Expansion valve)&...
Page 97 Thermo Holder& Thermistor (Outdoor Temp.) 2-way valve (Liquid) 3-way valve Thermistor (Gas) (Heat exchanger temp.) 03-02...
Page 98: Wiring
1-1-2 WIRING (For AO*18LMAK2/ 24LMAM2) 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 CLAMP Solenoid wire Fan motor wire Fan capacitor wire BIND (Thermistor (Outdoor temp.)) BIND (Thermistor (Heat exchanger temp.)) (Thermistor (Outdoor temp.))
Page 99: Disassembly Process
1-1-3 DISASSEMBLY PROCESS (For AO*18LMAK2/ 24LMAM2) 1. TOP PANEL removal Remove the 5 mounting screws. Remove the TOP PANEL upward. TOP PANEL REAR VIEW 2. CONTROL BOX COVER removal Remove the 3 mounting screws. Remove the CONTROL BOX COVER and TERMINAL COVER. CONTROL BOX COVER TERMINAL COVER 03-04...
Page 100 3. MAIN PCB removal Remove the 4 mounting screws. Remove the connectors and cords. (Refer to VIEW -A,-B) Remove the MAIN PCB. LABEL Wire UNIT A: 1 W4(Black) UNIT A: 2 W5(White) UNIT A: 3 W8(Red) UNIT B: 1 W6(Black) UNIT B: 2 W7(White) UNIT B: 3...
Page 101 4. FRONT PANEL removal Remove the 4 mounting screws. Remove the FRONT PANEL by sliding upward. Hook (2 places) Replaceable Component Compressor Accumulator Solenoid Thermistor (Discharge temp.) Thermistor (Outdoor temp.) PTC Thermistor Pressure SW Coil (Expansion valve) FRONT PANEL Hook Fan motor &...
Page 102 6. RIGHT PANEL removal Remove the 9 mounting screws. Hook Hook Hook Remove the RIGHT PANEL by sliding upward. RIGHT PANEL Replaceable Component Thermistor (Heat exchanger temp.) 03-07...
Page 103: For Ao*30Lmaw4
1-2 For AO*30LMAW4 1-2-1 PARTS LAYOUT DRAWING Active Filter Module Heat Exchanger Thermistor (Heat sink) Main PCB Fan motor Filter PCB Accumulator Thermistor (Compressor temp.) Compressor Choke coil Coil(Expansion valve)& Expansion valve Receiver tank Solenoid 4-way valve VIEW - A 03-08...
Page 104 Thermo Holder& Thermistor (Outdoor Temp.) 2-way valve (Liquid) Pressure SW Thermistor (Heat exchanger temp.) 3-way valve (Gas) 03-09...
Page 105: Wiring
1-2-2 WIRING (For AO*30LMAW4) BIND (Fan motor wire) CONNECT (Compressor wire) Pass 4 wires through behind this plate. Thermistor (Outdoor temp.) Thermistor (Heat exchanger temp.) Pressure SW wire To Comp. top To discharge pipe Thermistor (Compressor temp.) Thermistor (Discharge temp.) CONNECT BIND (9 wires) Pressure SW wire...
Page 106: Disassembly Process
1-2-3 DISASSEMBLY PROCESS (For AO*30LMAW4) 1. SERVICE PANEL removal Remove the 2 mounting screws. Remove the SERVICE PANEL by sliding downward. Replaceable Component Compressor Accumulator 4-way valve Solenoid Thermistor (Compressor temp.) Thermistor (Discharge temp.) Thermistor (Outdoor temp.) Hook Thermistor (Heat exchanger temp.) (3 places) Thermistor (2/3-way valve temp.) Pressure SW...
Page 107 3. INVERTER BOX removal Remove the 6 mounting screws. Remove the connectors and cords. (Refer to VIEW -C,-D) Remove the INVERTER BOX upward. REAR VIEW FRONT VIEW Remove Remove Remove Remove the connectors the connectors Connection cord. Connection cord. Terminal UNIT A UNIT B UNIT C...
Page 108 Remove the 1 mounting screw. Remove the INVERTER BOX COVER upward. INVERTER BOX COVER Hook (2 places) Remove the connector and cords. Twist W4 and W5 2 times or more. W4 (Black) CN1 (Black/Brown/Red) W5 (White) VIEW - E 03-13...
Page 109 Remove the connector and cords. Twist 4 times or more 2 turn the Wire this way " - " (Black) " L2 " (Brown) Thermistor (Heat sink) " + " (Red) " L1 " (White) CN407 " P " (Yellow) "...
Page 110 Remove the 6 mounting screws. Remove the INVERTER BOX A upward. INVERTER BOX A REAR VIEW LEFT SIDE VIEW Filter PCB Main PCB Remove the 2 mounting screws. Remove the 1 mounting screw. Remove the Filter PCB upward. Remove the Main PCB upward. Hook (3 places) Hook (2 places) Main PCB...
Page 111: Assembly Process Of Inverter Unit
1-2-4 ASSEMBLY PROCESS of INVERTER UNIT (For AO*30LMAW4) 1. FILTER PCB As shown in Fig.1, assemble FILTER PCB to INVERTER BOX A. As shown in Fig.2, pull out the wires of FILTER PCB. Hook (2 places) Screw (2 places) INVERTER BOX A FILTER PCB Fig.1 Fig.2...
Page 112 As shown in Fig.4, pull out the wires. W16 (Red) W17 (Black) Thermistor (Heat sink) W303 (Black) W304 (White) W305 (Red) CN407 Fig. 4 As shown in Fig.5, pull out the wires and fix them. Hook (2 places) W12 (Yellow) W13 (Blue) W17 (Black) W16 (Red)
Page 113 As shown in Fig.6, pull out the wires. W200 (Red) Fig. 6 As shown in Fig.7, pull out the wires. W200 (Red) HYIC1 CN1 wire with connector Fig. 7 Don't come in contact with HYIC1. DETAIL - A 03-18...
Page 114 As shown in Fig.8, connect wires. CN34 (Yellow) CN1 (White) Fig. 8 As shown in Fig.9, connect wires. W21 (Orange) W22 (Orange) PTC Thermistor Through this hole. TM101 (Black line) TM102 (White line) Fig. 9 03-19...
Page 115 As shown in Fig.10, fix the wire to INVERTER BOX A. Pull out the wire Hook (3 places) Thermistor (Heat sink) through this opening CN407 Fig. 10 As shown in the figures, set wire with connector and bind it to INVERTER BOX A. Bind wire to INVERTER BOX A.
Page 116 1116,Suenaga,Takatsu-ku,Kawasaki 213-8502,Japan May. 2008 Printed in Japan...

Fujitsu AB*14LBAJ Service Instruction

Description of each Control Operation

Trouble Shooting

Error Display

Trouble Shooting with Error Code

Trouble Shooting with no Error Code

Service Parts Information

REPLACEMENT PARTS ( for OUTDOOR UNIT )

3 Replacement Parts

Quick Links

Troubleshooting

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