Fujitsu AG G12LVCA Series Service Instruction
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Fujitsu AG G12LVCA Series Service Instruction

Fujitsu AG G12LVCA Series Service Instruction

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SERVICE
INSTRUCTION
R410A
SPLIT TYPE
ROOM AIR CONDITIONER
FLOOR
type
INVERTER
Models
Indoor unit
AG*G09LVCA
AG*G12LVCA
AG*G14LVCA
Outdoor unit
AO*G09LVCA
AO*G12LVCA
AO*G14LVLA

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Summary of Contents for Fujitsu AG G12LVCA Series

  • Page 1 SPLIT TYPE ROOM AIR CONDITIONER FLOOR type INVERTER SERVICE INSTRUCTION Models Indoor unit Outdoor unit AO*G09LVCA AG*G09LVCA AO*G12LVCA AG*G12LVCA AG*G14LVCA AO*G14LVLA 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: Description Of Each Control Operation

    R410A FLOOR type INVERTER 1 . DESCRIPTION OF EACH CONTROL OPERATION...

  • Page 4: Cooling Operation

    1. COOLING OPERATION A sensor (room temperature thermistor) built in the indoor unit body will usually perceive difference or variation between a set temperature and present room temperature, and controls the operation frequency of the compressor. * If the room temperature is 2°C higher than a set temperature, the compressor operation frequency will attain to maximum performance.

  • Page 5: Heating Operation

    2. HEATING OPERATION A sensor (room temperature thermistor) built in the indoor unit body will usually perceive difference or variation between a set temperature and present room temperature, and controls the operation frequency of the compressor. * If the room temperature is lower by 3°C than a set temperature, the compressor operation frequency will attain to maximum performance.

  • Page 6: 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 30°C...

  • Page 7: Indoor Fan Control

    5. INDOOR FAN CONTROL 1. Fan speed ( Table 5 : Indoor fan speed ) AG*G09/ 12LVCA Speed (rpm) Operation mode Air flow mode Upper& Lower Upper air flow mode air flow mode (Upper/ Lower) 1240/ 1040 1280/ --- Heating 1040/ 880 1080/ --- 840/ 700...
  • Page 8 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 5.

  • Page 9: 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/ 12LVCA AO*G14LVLA 2.

  • Page 10: Louver Control

    7. LOUVER CONTROL 1. VERTICAL LOUVER CONTROL (Function and Operation Range) Each time the button is pressed, the air direction range will change as follows: The Remote controller's display does not change. (Fig 9: 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 11: Compressor Control

    8. COMPRESSOR CONTROL 1. OPEARTION FREQUENCY RANGE The operation frequency of the compressor is different based on the operation mode as shown in the Table 9. (Table 9 : Compressor frequency range) Cooling / Dry Heating Minimum Maximum Minimum Maximum AO*G09LVCA 18rps 96rps...

  • Page 12: Timer Operation Control

    9. TIMER OPEARTION CONTROL 9-1 WIRELESS REMOTE CONTROLLER The Table 11 shows the available timer setting based on the product model. ( Table 11 : Timer Setting ) ON TIMER / OFF TIMER PROGRAM TIMER SLEEP TIMER AG*G09/ 12/ 14LVCA 1.
  • Page 13 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 14 9-2 WIRED REMOTE CONTROLLER (OPTION) The Table12 shows the available timer setting based on the product model. ( Table12 : Timer Setting ) ON TIMER / OFF TIMER WEEKLY TIMER TEMPERATURE SET BACK TIMER AG*G09/ 12/ 14LVCA ON TIMER / OFF TIMER Same to 9-1 1.ON TIMER / OFF TIMER and shown in those.

  • Page 15: 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 Table13. 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. ( Table13 : The pulse range of the electronic expansion valve control ) Operation mode Pulse range...

  • Page 16: 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 17: 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,...

  • Page 18: Defrost Operation Control

    20. DEFROST OPERATION CONTROL 1. CONDITION OF STARTING THE DEFROST OPERATION The defrost operation starts as shown in the following Table 18. (Table 18 : Condition of starting Defrost Operation) Compressor integrating operation time Normal defrost Less than 35 minutes More than 35 minutes Outdoor heat exchanger temp.
  • Page 19 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 20: Off Defrost Operation Control

    21. 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 21: Air Outlet Selection ( Damper Control )

    22. AIR OUTLET SELECTION ( DAMPER CONTROL ) With this function , air come out simultaneously from the upper and lower air outlets so that the room can be cooled or heated effectively. This function is set using the switch behind the front grille of the Indoor unit. (This function is available in cooling and heating operation.) 1.
  • Page 22 ( Fig.11 ) In Cooling mode When the room temperature rises Upper & Lower TR-Ts > 7°C TR-Ts > 2°C air flow TR-Ts < 7°C Upper air flow TR-Ts < 2°C TR : Room temperature Ts : Setting temperature When the room temperature drops ( Fig.12 ) In Heating mode...

  • Page 23: Various Protections

    23. 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 24 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 23 : Anti-freezing Protection Operation / Release Temperature) Outdoor temperature Temperature...

  • Page 25: Trouble Shooting

    R410A FLOOR type INVERTER 2 . TROUBLE SHOOTING...

  • Page 26: 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 : AG*G09/ 12/ 14LVCA The OPERATION, TIMER and ECONOMY lamps operate as follows according to the error contents. Indoor Unit Display Wired Remote Trouble...

  • Page 27: Wired Remote Controller Display

    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 28: 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 29 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 30 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 31 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 32 Trouble shooting 4 Indicate or Display: INDOOR UNIT Error Method: Refer to error code table. Manual auto switch error Detective Actuators: Detective details: Indoor unit Controller PCB When the Manual Auto Switch becomes ON for consecutive 60 or more seconds. Indicator PCB Manual auto switch Forecast of Cause :...
  • Page 33 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 34 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: When Heat Ex. Temperature Thermistor open or short-circuit is detected. Indoor unit Controller PCB Heat Ex.
  • Page 35 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 36 Trouble shooting 8-1 Indicate or Display: INDOOR UNIT Error Method: Damper error Refer to error code table. (Damper(Open/Close) detection Limit switch error) Detective Actuators: Detective details: When limit switch were not able to detect the close though the damper close. Indoor unit Controller PCB (Upper air flow) Limit switch...
  • Page 37 Trouble shooting 8-2 Indicate or Display: INDOOR UNIT Error Method: Damper error Refer to error code table. (Damper(Open/Close) simultaneous detection Limit switch error) Detective Actuators: Detective details: When the limit switch detects open and close at the simultaneous. Indoor unit Controller PCB Limit switch Forecast of Cause : 1.
  • Page 38 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 39 For AO*G09/ 12LVCA 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 40 For AO*G14LVLA 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 41 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 42 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 43 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 44 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 45 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 46 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 47 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 48 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 49 Trouble shooting 19 Indicate or Display: INDOOR UNIT Error Method: Refer to error code table. 4-way valve error Detective Actuators: Detective details: Indoor unit Controller PCB When the indoor heat exchanger temperature is compared with the room temperature, and either following condition is detected Heat Ex.
  • Page 50 Trouble shooting 20 Indicate or Display: OUTDOOR UNIT Error Method: INDOOR UNIT Discharge temperature error Refer to error code table. Detective Actuators: Detective details: "Protection stop by "discharge temperature 110degC during compressor Outdoor unit Main PCB Discharge temperature thermistor operation"" generated 2 times within 24 hours. Forecast of Cause : 1.

  • Page 51: 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 52 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 53 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 54 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 55 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 56: 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 57 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 C(T) (RED) C(T) (BLACK) (BLACK) (WHITE) (WHITE) (RED) AO*G09/ 12L AO*G14L Check Point 2 : Check Winding Resistance Check winding resistance of each terminal If the resistance value is 0 or infinite, replace Compressor.
  • Page 58 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 Noise at start up Check Point 2 : Check Coil of EEV...
  • Page 59 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 60 For AO*G14LVLA 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 61 For AO*G14LVLA 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: Appending Data

    R410A FLOOR type INVERTER 3 . APPENDING DATA...

  • Page 64: 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 65 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. Setting the 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 66: 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 67 Custom code setting for remote controller (1) Press the MODE button for more then 5 seconds. (2) Press the SET TEMP. ( ) buttons to change the signal code between Match the code on the display to the air conditioner signal code. (initially set to (3) Press the MODE button.

  • Page 68: Thermistor Resistance Values

    3-2. Thermistor Resistance Values 3-2-1 INDOOR UNIT Indoor heat exchanger thermistor Room temperature thermistor Temp (°C) Resistance(k ) Voltage(V) Temp (°C) Resistance(k ) Voltage(V) 58.2 -10.0 0.73 -30.0 1131.9 0.21 44.0 -5.0 0.93 -25.0 804.5 0.29 33.6 1.15 -20.0 579.6 0.40 25.9 1.39...
  • Page 69 1116,Suenaga,Takatsu-ku,Kawasaki 213-8502,Japan Dec. 2012 Printed in Japan...

This manual is also suitable for:

Ag g09lvca seriesAg g14lvca seriesAo g09lvca seriesAo g12lvca seriesAo g14lvla series

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