Fujitsu AS*G09LTCB Service Instructions Manual
Fujitsu AS*G09LTCB Service Instructions Manual

Fujitsu AS*G09LTCB Service Instructions Manual

Split type wall mounted type inverter

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SERVICE
INSTRUCTION
R410A
SPLIT TYPE
ROOM AIR CONDITIONER

WALL MOUNTED

INVERTER
Models
Indoor unit
AS*G09LTCB
AS*G12LTCB
AS*G14LTCB
type
Outdoor unit
AO*G09LTCN
AO*G12LTCN
AO*G14LTCN

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Summary of Contents for Fujitsu AS*G09LTCB

  • Page 1: Wall Mounted

    SPLIT TYPE ROOM AIR CONDITIONER WALL MOUNTED type INVERTER SERVICE INSTRUCTION Models Indoor unit Outdoor unit AS*G09LTCB AO*G09LTCN AS*G12LTCB AO*G12LTCN AS*G14LTCB AO*G14LTCN R410A...
  • Page 2: Table Of Contents

    CONTENTS 1. DESCRIPTION OF EACH CONTROL OPERATION 1. COOLING OPERATION....................01-01 2. HEATING OPERATION....................01-02 3. DRY OPERATION......................01-02 4. AUTO CHANGEOVER OPERATION................01-03 5. INDOOR FAN CONTROL....................01-04 6. OUTDOOR FAN CONTROL..................01-06 7. LOUVER CONTROL..................... 01-07 8. COMPRESSOR CONTROL..................01-08 9.
  • Page 3 2. TROUBLE SHOOTING 2-1 ERROR DISPLAY....................... 02-01 2-1-1 INDOOR UNIT AND WIRED REMOTE CONTROLLER DISPLAY..... 02-01 2-1-2 WIRED REMOTE CONTROLLER DISPLAY (OPTION)........02-02 2-2 TROUBLE SHOOTING WITH ERROR CODE............02-03 2-3 TROUBLE SHOOTING WITH NO ERROR CODE............. 02-25 2-4 SERVICE PARTS INFORMATION................02-30 3.
  • Page 5: Description Of Each Control Operation

    R410A WALL MOUNTED type INVERTER 1 . DESCRIPTION OF EACH CONTROL OPERATION...
  • Page 6: Cooling Operation

    However, the maximum frequency is limited in the range shown in Fig.1 based on the indoor fan mode and the outdoor temperature. ( Table 1 : Compressor frequency range ) Minimum Maximum Maximum frequency frequency frequency AS*G09LTCB 18rps 76rps 96rps 76rps AS*G12LTCB 15rps 57rps 91rps...
  • Page 7: Heating Operation

    Table 3. However, the maximum frequency is limited shown in Table 4 based on the fan mode. ( Table 3 : Compressor frequency range ) Minimum Maximum frequency frequency AS*G09LTCB 18rps 130rps AS*G12LTCB 16rps 119rps 16rps...
  • Page 8: Auto Changeover Operation

    4. 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, Dry and Monitoring modes. During operation, the optimum mode is automatically switched in accordance with temperature changes. The temperature can be set between 18°C and 30°C in 1°C steps.
  • Page 9: Indoor Fan Control

    5. INDOOR FAN CONTROL 1. Fan speed ( Table 5 : Indoor fan speed ) Speed (rpm) Operation mode Air flow mode AS*G09LTCB AS*G12LTCB AS*G14LTCB Powerful 1410 1470 1620 Heating 1300 1370 1510 1220 1260 1440 1120 1180 1220 1030...
  • Page 10 5. HEATING OPERATION Switch the airflow [Auto], and the indoor fan motor will run according to a room temperature, as shown in Fig. 5 On the other hand, if switched in [Hi] [Quiet], the indoor motor will run at a constant airflow of [Heat] operation modes Quiet, Lo, Me, High, as shown in Table 6.
  • Page 11: Outdoor Fan Control

    6. OUTDOOR FAN CONTROL 1. Outdoor Fan Motor Following table shows the type of the outdoor fan motor. The control method is different between AC motor and DC motor. ( Table 7 : Type of Motor ) AC Motor DC Motor AO*G09/ 12/ 14LTCN 2.
  • Page 12: Louver Control

    7. LOUVER CONTROL 1. VERTICAL LOUVER CONTROL (Function Range) Each time the button is pressed, the air direction range will change as follow: Fig.9 : Air Direction Range Types of Air flow Direction Setting: : During Cooling/Dry modes : During Heating The Remote Controller's display does not change.
  • Page 13: Compressor Control

    The operation frequency of the compressor is different based on the operation mode as shown in the Table 11. (Table 11 : Compressor frequency range) Cooling / Dry Heating Minimum Maximum Minimum Maximum AS*G09LTCB 18rps 96rps 18rps 130rps AS*G12LTCB 15rps 76rps 16rps...
  • Page 14: Timer Operation Control

    9. TIMER OPEARTION CONTROL 9-1 WIRELESS REMOTE CONTROLLER The Table 13 shows the available timer setting based on the product model. ( Table 13 : Timer Setting ) ON TIMER / OFF TIMER PROGRAM TIMER SLEEP TIMER WEEKLY TIMER AS*G09/ 12/ 14LTCB 1.
  • Page 15 3. SLEEP TIMER If the sleep 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°C.
  • Page 16 9-2 WIRED REMOTE CONTROLLER (OPTION) The Table14 shows the available timer setting based on the product model. ( Table14 : Timer Setting ) ON TIMER / OFF TIMER WEEKLY TIMER TEMPERATURE SET BACK TIMER AS*G09/ 12/ 14LTCB ON TIMER / OFF TIMER Same to 9-1 1.ON TIMER / OFF TIMER and shown in those.
  • Page 17: Electronic Expansion Valve Control

    10. 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 Table15. The compressor frequency, the detected temperature by the discharge temperature sensor, the indoor heat exchanger sensor, the outdoor heat exchanger sensor, and the outdoor temperature sensor. ( Table15 : The pulse range of the electronic expansion valve control ) Operation mode Pulse range...
  • Page 18: Auto Restart

    14. 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 started with the memorized operation contents. When the power is interrupted and recovered during timer operation, since the timer operation time is shifted by the time the power was interrupted, an alarm is given by blinking (7 sec ON/2 sec OFF) the indoor unit body timer lamp.
  • Page 19: Compressor Preheating

    17. COMPRESSOR PREHEATING When the outdoor heat exchanger temperature is lower than 5°C and the all operation has been stopped for 30 minutes, power is applied to the compressor and the compressor is heated. (By heating the compressor, warm air is quickly discharged when operation is started.) When operation was started, and when the outdoor heat exchanger temperature rises to 7°C or greater, preheating is ended.
  • Page 20: Outdoor Unit Low Noise Operation

    21. OUTDOOR UNIT LOW NOISE OPERATION The OUTDOOR UNIT LOW NOISE Operation functions by pressing OUTDOOR UNIT LOW NOISE button on the remote controller. This operation stops the PFC control, and changes the Current release operation/release value. OUTDOOR UNIT LOW NOISE Operation mode can be used during cooling, heating and automatic operation. It can not be used in Fan and Dry mode ( Table 21 ) Control / Release...
  • Page 21: Defrost Operation Control

    24. DEFROST OPERATION CONTROL 1. CONDITION OF STARTING THE DEFROST OPERATION The defrost operation starts as shown in the following Table 23. (Table 23 : Condition of starting Defrost Operation) Compressor integrating operation time Normal defrost Less than 25 minutes (09/ 12L) More than 25 minutes (09/ 12L) Less than 40 minutes (14L) More than 40 minutes (14L)
  • Page 22 3. Defrost Flow Chart The defrosting shall proceed by the integrating operation time, outdoor temperature and outdoor heat exchanger temperature as follows. Heating operation start : Compressor ON (Not defrosted for 10 minutes) Normal defrost Integrating defrost Intermittent operation Continuous operation utside air temp.
  • Page 23: Off Defrost Operation Control

    25. OFF DEFROST OPEARTION CONTROL When operation stops in the [Heating operation] mode, if frost is adhered to the outdoor unit heat exchanger, the defrost operation will proceed automatically. In this time, if indoor unit operation lamp flashes slowly (7 sec ON / 2 sec OFF), the outdoor unit will allow the heat exchanger to defrost, and then stop.
  • Page 24: Various Protections

    26. VARIOUS PROTECTIONS 1. DISCHARGE GAS TEMPERATURE OVERRISE PREVENSION CONTROL The discharge gas thermosensor (discharge thermistor : Outdoor side) will detect discharge gas temperature. When the discharge temperature becomes higher than Temperature , the compressor frequency is decreased 20rps, and it continues to decrease the frequency for 20rps every 120 seconds until the temperature becomes lower than Temperature .
  • Page 25 3. ANTIFREEZING CONTROL (Cooling and Dry mode) The compressor frequency is decrease on cooling & dry mode when the indoor heat exchanger temperature sensor detects the temperature lower than Temperature . Then, the anti-freezing control is released when it becomes higher than Temperature . (Table 27 : Anti-freezing Protection Operation / Release Temperature) Outdoor temperature Temperature...
  • Page 27: Trouble Shooting

    R410A WALL MOUNTED type INVERTER 2 . TROUBLE SHOOTING...
  • Page 28: Error Display

    2. TROUBLESHOOTING 2-1 ERROR DISPLAY 2-1-1 INDOOR UNIT AND WIRED REMOTE CONTROLLER DISPLAY Please refer the flashing pattern as follows. Indoor Unit : AS*G09/ 12/ 14LTCB The OPERATION, TIMER and ECONOMY lamps operate as follows according to the error contents. Indoor Unit Display Wired Remote Trouble...
  • Page 29: Wired Remote Controller Display (Option)

    2-1-2 WIRED REMOTE CONTROLLER DISPLAY (OPTION) 1. SELF - DIAGNOSIS When " Er " 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 30: Trouble Shooting With Error Code

    2-2 TROUBLE SHOOTING WITH ERROR CODE Trouble shooting 1-1 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. Serial communication error (Serial Reverse Transfer Error) Detective details: Detective Actuators: When the indoor unit cannot receive the serial signal from Outdoor unit Outdoor unit Main PCB more than 2minutes after power ON, or the indoor unit cannot receive Outdoor unit fan motor...
  • Page 31 Trouble shooting 1-2 Indicate or Display: INDOOR UNIT Error Method: Refer to error code table. Serial communication error (Serial Forward Transfer Error) Detective details: Detective Actuators: When the outdoor unit cannot receive the serial signal from Indoor unit Indoor unit Controller PCB more than 10seconds.
  • Page 32 Trouble shooting 2 Indicate or Display: INDOOR UNIT Error Method: Remote controller communication Refer to error code table. error Detective details: Detective Actuators: When the indoor unit cannot receive the signal from Wired Remote Control Indoor unit Controller PCB more than 1minute during normal operation. Wired remote control Forecast of Cause: 1.
  • Page 33 Trouble shooting 3 Indicate or Display: INDOOR UNIT Error Method: Refer to error code table. Indoor unit main PCB error Detective details: Detective Actuators: When power is on and there is some below case. Indoor unit Controller PCB 1. When model information of EEPROM is incorrect. 2.
  • Page 34 Trouble shooting 4 Indicate or Display: INDOOR UNIT Error Method: INDOOR UNIT Refer to error code table. Manual auto switch error Detective details: Detective Actuators: Indoor unit Controller PCB When the Manual Auto Switch becomes ON for consecutive 60 or more seconds.
  • Page 35 Indicate or Display: Trouble shooting 5 INDOOR UNIT Error Method: INDOOR UNIT Refer to error code table. Room temperature sensor error Detective details: Detective Actuators: Indoor unit Controller PCB When Room Temperature Thermistor open or short-circuit is detected. Room temperature thermistor Forecast of Cause : 1.
  • Page 36 Trouble shooting 6 Indicate or Display: INDOOR UNIT Error Method: INDOOR UNIT Refer to error code table. Indoor unit Heat Ex. sensor error Detective Actuators: Detective details: Indoor unit Controller PCB When Heat Ex. Temperature Thermistor open or short-circuit is detected. Heat Ex.
  • Page 37 Trouble shooting 7 Indicate or Display: INDOOR UNIT Error Method: Refer to error code table. Indoor unit fan motor error Detective Actuators: Detective details: When the condition that actual frequency of Indoor Fan is Indoor unit Controller PCB below 1/3 of target frequency is continued more than 56 seconds. Indoor unit Fan motor Forecast of Cause: 1.
  • Page 38 Trouble shooting 8 Indicate or Display: INDOOR UNIT Error Method: INDOOR UNIT Intake grille error Refer to error code table. Detective Actuators: Detective details: Indoor unit Controller PCB When the Micro switch is detected open while running the compressor. Micro switch Forecast of Cause : 1.
  • Page 39 Trouble shooting 9 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. Outdoor unit main PCB error Detective details: Detective Actuators: Access to EEPROM failed due to some cause after outdoor unit started. Outdoor unit Main PCB Forecast of Cause: 1.
  • Page 40 For AO*G09/ 12LTCN Trouble shooting 10-1 Indicate or Display: OUTDOOR UNIT Error Method: INDOOR UNIT Refer to error code table. PFC circuit error Detective Actuators: Detective details: When inverter output DC voltage is higher than 415V for over 3 seconds, Outdoor unit Main PCB the compressor stops.
  • Page 41 For AO*G14LTCN Indicate or Display: Trouble shooting 10-2 OUTDOOR UNIT Error Method: INDOOR UNIT Refer to error code table. Active filter error Detective Actuators: Detective details: Outdoor unit Main PCB When inverter input DC voltage is higher than 425V or Active filter module lower than 80V.
  • Page 42 Trouble shooting 11 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. IPM error Detective Actuators: Detective details: When more than normal operating current to IPM in Main PCB flows, Outdoor unit Main PCB the compressor stops. Outdoor unit Transistor PCB (14L) After the compressor restarts, if the same operation is repeated within 40sec, Compressor...
  • Page 43 Trouble shooting 12 Indicate or Display: OUTDOOR UNIT Error Method: INDOOR UNIT Refer to error code table. Discharge thermistor error Detective details: Detective Actuators: When Discharge pipe temperature thermistor open or short-circuit Outdoor unit Main PCB is detected at power ON or while running the compressor. Discharge pipe temperature thermistor Forecast of Cause : 1.
  • Page 44 Trouble shooting 13 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. Outdoor unit Heat Ex. sensor error Detective details: Detective Actuators: Outdoor unit Main PCB When Heat exchanger temperature thermistor open or Heat exchanger temperature thermistor short-circuit is detected at power ON or while running the compressor.
  • Page 45 Trouble shooting 14 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. Outdoor thermistor error Detective details: Detective Actuators: Outdoor unit Main PCB When Outdoor temperature thermistor open or short-circuit is Outdoor temperature thermistor detected at power ON or while running the compressor. Forecast of Cause : 1.
  • Page 46 Trouble shooting 15 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. Current sensor error Detective details: Detective Actuators: When Input Current Sensor has detected 0A, while Inverter Compressor is Outdoor unit Main PCB operating at higher than 56rps, after 1minute upon starting the Compressor. (Except during the defrost operation) Forecast of Cause : 1.
  • Page 47 Trouble shooting 16 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. Trip detection Detective details: Detective Actuators: "Protection stop by overcurrent generation after inverter compressor start Outdoor unit Main PCB processing completed'' generated consecutively 10 times. Compressor * The number of generations is reset if the start-up of the compressor succeeds.
  • Page 48 Trouble shooting 17 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. Compressor motor control error Detective details: Detective Actuators: If the detected rotor location is out of phase with actual rotor location Outdoor unit Main PCB more than 90°, the compressor stops.
  • Page 49 Trouble shooting 18 Indicate or Display: 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 after fan motor starts, fan motor stops.
  • Page 50 Trouble shooting 19 Indicate or Display: INDOOR 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 the room temperature, and either following condition is detected Heat Ex.
  • Page 51 Trouble shooting 20 Indicate or Display: OUTDOOR UNIT Error Method: INDOOR UNIT Discharge temperature error Refer to error code table. Detective details: Detective Actuators: Outdoor unit Main PCB "Protection stop by "discharge temperature 110degC during compressor Discharge temperature thermistor operation"" generated 2 times within 24 hours. Forecast of Cause : 1.
  • Page 52: Trouble Shooting With No Error Code

    2-3 TROUBLE SHOOTING WITH NO ERROR CODE Forecast of Cause: Trouble shooting 21 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 53 Forecast of Cause: Trouble shooting 22 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 54 Forecast of Cause: Trouble shooting 23 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, check if there is an open cable connection.
  • Page 55 Forecast of Cause: Trouble shooting 24 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 56 Forecast of Cause : Trouble shooting 25 1. Abnormal installation (Indoor/ Outdoor) Abnormal Noise 2. Fan failure (Indoor/ Outdoor) 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 57: 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 cable?
  • Page 58 SERVICE PARTS INFORMATION 2 Inverter Compressor Check Point 1 : Check Connection Check terminal connection of Compressor (loose or incorrect wiring) Terminal cover opened Terminal cover opened (BLACK) C(W) (BLACK) R(U) S(V) (RED) (WHITE) (RED) (WHITE) AO*G12/ 14L AO*G09L Check Point 2 : Check Winding Resistance Check winding resistance of each terminal If the resistance value is 0 or infinite, replace Compressor.
  • Page 59 SERVICE PARTS INFORMATION 3 Outdoor unit Electronic Expansion Valve ( EEV ) Check Point 1 : Check Connections Check connection of connector (CN40) ( Loose connector or open cable ) EXPANSION CN40 VALVE COIL [09/12L] BLUE ORANGE YELLOW CN700 WHITE [14L] Check Point 3 : Check Voltage from Main PCB.
  • Page 60 SERVICE PARTS INFORMATION 4 Indoor unit fan motor Check Point 1 : Check rotation of Fan Rotate the fan by hand when operation is off. (Check if fan is caught, dropped off or locked motor) >>If Fan or Bearing is abnormal, replace it. Check Point 2 : Check resistance of Indoor Fan Motor Refer to below.
  • Page 61 For AO*G14LTCN SERVICE PARTS INFORMATION 6 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(-) (+IN)
  • Page 62 For AO*G14LTCN SERVICE PARTS INFORMATION 7 Mounted on Transistor PCB) Check Point 1 Disconnect the connection wires between the Transistor PCB - Capacitor PCB and Transistor PCB - Inverter Compressor. Set the tester to the "Resistance" mode, and measure the resistance between the following terminals. TM301 (P) - TM305(U) / TM304(V) / TM303(W) TM302 (N) - TM305(U) / TM304(V) / TM303(W) Judge the result of...
  • Page 63 SERVICE PARTS INFORMATION 8 Heater Unit Check Point 1 : Check Connections Check connection of connector ( Loose connector or open cable ) AO*G09/ 12LTCN CN10 1 2 3 4 5 THERMOSTAT 1 2 3 4 5 (55°C) FUSE 250V5A BLACK BLACK BLACK...
  • Page 65: Appending Data

    R410A WALL MOUNTED type INVERTER 3 . APPENDING DATA...
  • Page 66: Function Setting

    3-1. FUNCTION SETTING 3-1-1 INDOOR UNIT Follow the instructions in the Local Setup Procedure, which is supplied with the remote control, in accordance with the installed condition. After the power is turned on, perform the Function Setting on the remote control. The settings may be selected between the following two: Function Number or Setting Value.
  • Page 67 1-4. Setting the Auto Restart Enable or disable automatic system restart after a power outage. Factory setting) Setting Description Function Number Setting Value 1-5. Indoor room temperature sensor switching function (Only for Wired remote controller) The following settings are needed when use the control by Wired remote controller temperature sensor.
  • Page 68: Procedures To Change The Function Setting For Wireless Rc

    3-1-2 Procedures to change the Function Setting for wireless RC This procedure changes to the function settings used to control the indoor unit according to the installation conditions. Incorrect settings can cause the indoor unit malfunction. After the power is turned on, perform the "FUNCTION SETTING" according to the installation conditions using the remote controller.
  • Page 69 Selecting the Remote Controller Signal Code (1) Press the START/STOP( ) button until only the clock is displayed on the remote controller display. (2) Press the MODE button for at least 5 seconds to display the current signal code. (initially set to (3) Press the SET TEMP.( ) ( ) buttons to change the signal code between Match the code on the display to the air conditioner signal code.
  • Page 70: Thermistor Resistance Values

    3-2. Thermistor Resistance Values 3-2-1 INDOOR UNIT Room temperature thermistor Indoor heat exchanger thermistor Temp ( C) Resistance(k ) Voltage(V) Temp ( C) Resistance(k ) Voltage(V) -10.0 58.2 0.73 -30.0 1131.9 0.21 -5.0 44.0 0.93 -25.0 804.5 0.29 33.6 1.15 -20.0 579.6 0.40...
  • Page 71 1116,Suenaga,Takatsu-ku,Kawasaki 213-8502,Japan September 2011 Printed in Japan...

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