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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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See also: Service Instructions , Manual
SERVICE
INSTRUCTION
R410A
SPLIT TYPE
ROOM AIR CONDITIONER
Universal Floor / Ceiling
Duct / Cassette
Wall Mounted / Floor type
INVERTER MULTI
Models
Indoor unit
AB*14LBAJ
AB*18LBAJ
AB*F14LAT
AB*F18LAT
AR* 9LUAB
AR*12LUAD
AR*14LUAD
AR*18LUAD
AR*F09LALU
AR*F12LALU
AR*F14LALU
AR*F18LALU
Outdoor unit
AU*12LBAB
AO*A18LAT3
AU*14LBAB
AO*A24LAT3
AU*18LBAB
AU*F09LAL
AU*F12LAL
AU*F14LAL
AU*F18LAL
AS* 7LMACW
AS* 9LMACW
AS*12LMACW
AS*A07LACM
AS*A09LACM
AS*A12LACM
AS*A14LACM
AS*A18LACM
AG*F09LAC
AG*F12LAC
AG*F14LAC

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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 AB*14LBAJ AU*12LBAB AO*A18LAT3 AU*14LBAB AB*18LBAJ AO*A24LAT3 AB*F14LAT AU*18LBAB AB*F18LAT AU*F09LAL AU*F12LAL AR* 9LUAB 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..................01-10 5. LOUVER CONTROL....................01-11 6. COMPRESSOR CONTROL..................01-18 7. TIMER OPERATION CONTROL................01-19 8. ELECTRONIC EXPANSION VALVE CONTROL............01-23 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*F14LAT AB*F18LAT...
  • Page 6 AU*12/ 14LBAB AU*18LBAB Operation mode Air flow mode Speed (rpm) Operation mode Air flow mode Speed (rpm) Cooling Cooling Heating Heating S-Lo S-Lo AU*F09LAL AU*F12LAL Operation mode Air flow mode Operation mode Air flow mode Speed (rpm) Speed (rpm) Cooling Cooling Quiet Quiet...
  • Page 7 AS*7LMACW Speed (rpm) Operation mode Air flow mode Louver position Louver position 4 5 6 Cooling 1100 1050 1000 Quiet 1120 1100 Heating 1070 1030 1000 Quiet S- Lo AS*9LMACW Speed (rpm) Operation mode Air flow mode Louver position Louver position 4 5 6 Cooling 1200...
  • 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*A Type When the compressor operates, the maximum value of the indoor fan speed is set as shown in Figure 7, 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.7 : Cool Air Prevention Control ) <...

  • Page 13: 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*A18LAT3 780/ 730/ 400/ 300/ 250/ 200 rpm 780/ 730/ 660/ 400/ 300/ 250 rpm AO*A24LAT3 It runs at 500rpm for 20 seconds after starting up the outdoor fan.

  • Page 14: 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 15 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 16 (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 17 5-3 Wall Mounted (AS) 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 18 5-4 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 19 5-5 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 20 5-6 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 21: 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*A18LAT3 20Hz 100Hz 24Hz 110Hz AO*A24LAT3 2.

  • Page 22: 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 23 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 24 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 25 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 26: 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 27: 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 28: 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 29 3. Defrost Flow Chart 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.

  • Page 30: 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 31: 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 105°C ,the compressor frequency is decreased 20 Hz, and it continues to decrease the frequency for 20 Hz every 120 seconds until the temperature becomes lower than 105°C When the discharge temperature becomes lower than...
  • Page 32 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 and outdoor heat exchanger temperature sensor.

  • Page 33: Trouble Shooting

    R410A Universal Floor / Ceiling Duct / Cassette Wall Mounted / Floor type INVERTER (MULTI ) 2 . TROUBLE SHOOTING...

  • Page 34: 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 35 For AB*14/ 18L / 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 (Opened) Room temperature thermistor error...
  • Page 36 For AS*A09 - 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 37 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 38 For AU*F09 - 18LAL AB*F14/ 18LAT 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 39: Outdoor Unit Display

    2-1-2 OUTDOOR UNIT DISPLAY 1. ERROR DISPLAY Trouble Error Contents shooting 1 times blink Outdoor communication signal error 1 times blink (Forward transfer signal error) 1 times blink Outdoor discharge pipe temperature 2 times blink thermistor error Outdoor heat exchanger temperature 3 times blink thermistor error 4 times blink...

  • Page 40: Wired Remote Controller Display

    2-1-3 WIRED REMOTE CONTROLLER DISPLAY (For AR*9L - 18L) 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 41 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 42 2-1-4 WIRED REMOTE CONTROLLER DISPLAY (For AR*F09 - 18L) 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 43 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 44: 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 45 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 46 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 47 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 48 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 49 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 50 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 51 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 52 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 53 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 54 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 55 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 56 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 57 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 58 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 59 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 60 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 61 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 62 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 63 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 64 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 65 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 66 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 67 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: For AS*A09-18LACM Indoor Unit Controller PCB Circuit When the Forced auto switch becomes ON for 10 consecutive seconds. Forced auto switch For AG*F09-14LAC When the Forced auto switch becomes ON for 30 consecutive seconds.
  • Page 68 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 69 Indicate or Display: Indicate or Display: Trouble shooting 27 OUTDOOR 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 70 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 71 Indicate or Display: Trouble shooting 29 OUTDOOR UNIT Error Method: Refer to error code table. CT error Detective details: Detective Actuators: When Input Current Sensor has detected 0A, while Inverter Compressor is Outdoor Unit Main PCB Circuit operating at higher than 60Hz, after 1minute upon starting the Compressor. Outdoor Unit Filter PCB Circuit (Except during the defrost operation) (Input current sensor unit)
  • Page 72 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 73 Indicate or Display: Trouble shooting 31 OUTDOOR UNIT Error Method: Refer to error code table. Excessive high pressure protection on cooling Detective details: Detective Actuators: Excessive high pressure protection on cooling mode has been Outdoor Unit Main PCB Circuit activated. Outdoor Fan Motor Heat Exchanger Temp.
  • Page 74 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 following condition is detected even only one time Outdoor Unit Main PCB Circuit between 6min. - 15min. after compressor starts, compressor stops. Discharge Temperature Thermistor Outdoor Temperature Thermistor Cooling operation...
  • Page 75 Indicate or Display: Trouble shooting 33 OUTDOOR UNIT Error Method: INDOOR UNIT Refer to error code table. Compressor temperature error Detective details: Detective Actuators: When the compressor temperature becomes higher than 110°C, Outdoor Unit Main PCB Circuit the compressor stops. Compressor Temperature Thermistor Forecast of Cause : 1.
  • Page 76 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 77 Indicate or Display: Trouble shooting 36 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 78 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 79 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 80 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 81: 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 82 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 83 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 84 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 85 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 86: 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 87 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 (BLACK) W305 MAIN PCB (RED) W304 W303 (WHITE) WHITE BLACK...
  • Page 88 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 89 SERVICE PARTS INFORMATION 4 Outdoor unit Electronic Expansion Valve ( EEV ) Check Point 1 : Check Connections Check connection of connector ( Loose connector or open cable ) EXPANSION VALVE COIL A BROWN BLUE CN27 ORANGE YELLOW WHITE EXPANSION BLACK VALVE COIL B WHITE...
  • Page 90 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 91 SERVICE PARTS INFORMATION 5 Indoor Unit Fan Motor Check Point : AB*14/ 18LBAJ Check each winding resistance of the motor If Resistance value is abnormal, replace motor. AB*14LBAJ BLUE Read Wire Resistance value VIOLET White PINK Black Thermal protector 140°C 80.0...
  • Page 92 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 White 10.7...

  • Page 93: Replacement Parts

    R410A Universal Floor / Ceiling Duct / Cassette Wall Mounted / Floor type INVERTER (MULTI ) 3 . REPLACEMENT PARTS...
  • Page 94 3. REPLACEMENT PARTS TOP PANEL SUB ASSY MOTOR BRACKET SUB ASSY MOTOR. DC BRUSHLESS PROPELLER FAN ASSY NET S PROTECTIVE CONDENSER A ASSY RIGHT PANEL SUB ASSY GRIP FRONT PANEL SUB ASSY BASE ASSY CAP FOOT FAN GUARD VALVE COVER SUB ASSY SERVICE PANEL SUB ASSY 03-01...
  • Page 95 PRESSURE PRESSURE THERMO HOLDER SOLENOID SWITCH B SWITCH A RECEIVER SEPARATE WALL WATER SEAL TANK ASSY SUB ASSY PLATE Connector : RED VALVE PLATE THERMISTOR A ASSY COIL, CHOKE (VALVE C) 4-WAY VALVE ASSY ACCUMULATOR ASSY EXPANSION VALVE 3-WAY VALVE ASSY(3/8") 2-WAY VALVE ASSY...
  • Page 96 INVERTER BOX COVER CONTROLLER PCB ASSY POWER SUPPLY PCB ASSY HOLDER(THERMO) ACTPM INVERTER BOX C INVERTER BOX A FUSE HOLDER (SMALL) FUSE HOLDER (BIG) INVERTER BOX DUCT INVERTER BOX B ASSY HEAT SINK A FUSE FUSE HOLDER (BIG) (SMALL) TERMINAL 3P FUSE(BIG) TERMINAL 2P TERMINAL 6P...
  • Page 97 1116,Suenaga,Takatsu-ku,Kawasaki 213-8502,Japan May. 2008 Printed in Japan...

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