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Fujitsu AO G09KBTB Series Service Instruction

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SERVICE
INSTRUCTION
SPLIT TYPE
ROOM AIR CONDITIONER
Cassette
INVERTER
Models Indoor unit
AUXG09KVLA
AUXG12KVLA
AUXG14KVLA
AUXG18KVLA
AUXG22KVLA
RCG09KVLA
RCG12KVLA
RCG14KVLA
RCG18KVLA
RCG22KVLA
type
Outdoor unit
AO*G09KBTB
AO*G12KBTB
AO*G14KBTB
AO*G18KBTB
AO*G22KBTB
ROG09KBTB
ROG12KBTB
ROG14KBTB
ROG18KBTB
ROG22KBTB

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Summary of Contents for Fujitsu AO G09KBTB Series

  • Page 1 SPLIT TYPE ROOM AIR CONDITIONER Cassette type INVERTER SERVICE INSTRUCTION Models Indoor unit Outdoor unit AO*G09KBTB AUXG09KVLA AO*G12KBTB AUXG12KVLA AUXG14KVLA AO*G14KBTB AUXG18KVLA AO*G18KBTB AO*G22KBTB AUXG22KVLA ROG09KBTB RCG09KVLA RCG12KVLA ROG12KBTB RCG14KVLA ROG14KBTB ROG18KBTB RCG18KVLA ROG22KBTB RCG22KVLA...
  • Page 2 CASSETTE type INVERTER 2 . TROUBLE SHOOTING...
  • Page 3 2 ERROR DISPLAY 2-1 INDOOR UNIT AND WIRED REMOTE CONTROLLER DISPLAY Check the Error LED display on the Indoor unit (IR Receiver *Option ) 1. Check ECONOMY (Green) LED Blinking, it means the Error on the system. (Not brinking: No Error) 2.
  • Page 4 2-2 TROUBLE SHOOTING WITH ERROR CODE Indicate or Display: Trouble shooting 1 OUTDOOR UNIT Error Method: Error code : 11 Outdoor unit : No indication 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 5 Indicate or Display: Trouble shooting 2 INDOOR UNIT Error Method: Error code : 11 Outdoor unit : No indication Serial communication error (Serial Forward Transfer Error) Detective details: Detective Actuators: When the outdoor unit cannot properly receive the serial signal from Indoor unit Controller PCB indoor unit for 10 seconds or more.
  • Page 6 Indicate or Display: Trouble shooting 3 INDOOR UNIT Error Method: Error code : 12 Outdoor unit : No indication Wired Remote Controller Communication Error Detective details: Detective Actuators: Upon receiving the signal more than 1 time from Wired Remote or other Indoor Indoor unit Controller PCB unit, but the same signal has not been received more than 1 minute Wired Remote Controller...
  • Page 7 Indicate or Display: Trouble shooting 5 INDOOR UNIT Error Method: Outdoor unit : No indication Error code : 18 External communication error Detective Actuators: Detective details: After receiving a signal from the external I/O PCB, External communication error the same a signal has not been received for 15sec Forecast of Cause : 1.
  • Page 8 Trouble shooting 6 Indicate or Display: INDOOR UNIT Error Method: Outdoor unit : No indication Error code : 23 Combination error Detective Actuators: Detective details: 1. The outdoor unit receives the serial signal of applied refrigerant Indoor unit information from Indoor unit. When the refrigerant is R410a. 2.
  • Page 9 Trouble shooting 7 Indicate or Display: INDOOR UNIT Error Method: Outdoor unit : No indication Error code : 26 Indoor unit address setting error Detective Actuators: Detective details: When the address number set by auto setting and manual setting are Wired remote controller ( 2-Wire ) mixed in one RC group.
  • Page 10 Trouble shooting 8 Indicate or Display: INDOOR UNIT Error Method: Connection unit number error (Indoor Outdoor unit : No indication Error code : 29 unit in Wired remote controller system) Detective Actuators: Detective details: Wired remote controller ( 2-Wire ) When the number of connecting indoor units are out of specified rule.
  • Page 11 Trouble shooting 9 Indicate or Display: INDOOR UNIT Error Method: Error code : 32 Outdoor unit : No indication Indoor unit PCB model information error Detective Actuators: Detective details: When power is on and there is some below case. Indoor unit Controller PCB 1.
  • Page 12 Trouble shooting 10 Indicate or Display: INDOOR UNIT Error Method: Error code : 33 Outdoor unit : No indication Indoor unit motor electricity consumption detection error Detective Actuators: Detective details: Indoor unit fan motor When the voltage value or the current value of the motor go beyond the limits. Indoor unit Controller PCB circuit Forecast of Cause: 1.
  • Page 13 Trouble shooting 11 Indicate or Display: INDOOR UNIT Error Method: Error code : 35 Outdoor unit : No indication Manual auto switch Error Detective Actuators: Detective details: Indoor unit Controller PCB When the Manual Auto Switch becomes ON Indicator PCB for consecutive 60 or more seconds.
  • Page 14 Trouble shooting 12 Indicate or Display: INDOOR UNIT Error Method: Error code : 39 Outdoor unit : No indication Indoor unit power supply error for fan motor Detective Actuators: Detective details: Indoor unit Power Supply PCB When a momentary power cut off. When do not start fan motor.
  • Page 15 Trouble shooting 13 Indicate or Display: INDOOR UNIT Error Method: Indoor unit Communication circuit Outdoor unit : No indication Error code : 3A (wired remote controller) error Detective Actuators: Detective details: Indoor unit Controller PCB circuit Detect the communication error of microcomputer and communication PCB. Forecast of Cause : 1.Communication PCB defective 2.
  • Page 16 Trouble shooting 14 Indicate or Display: INDOOR UNIT Error Method: Error code : 41 Outdoor unit : No indication Indoor Room Thermistor Error Detective details: Detective Actuators: Indoor unit Controller PCB Circuit Indoor unit thermistor is open or short is detected always. Indoor Temperature Thermistor Forecast of Cause : 1.
  • Page 17 Trouble shooting 15 Indicate or Display: INDOOR UNIT Error Method: Error code : 42 Outdoor unit : No indication Indoor Heat Ex. Thermistor Error Detective details: Detective Actuators: Indoor unit Controller PCB Circuit Indoor unit thermistor is open or short is detected always. Heat Exchanger (MID) Thermistor Forecast of Cause : 1.
  • Page 18 Trouble shooting 16 Indicate or Display: INDOOR UNIT Error Method: Error code : 51 Outdoor unit : No indication Indoor Unit Fan Motor Error Detective Actuators: Detective details: Indoor unit Power Supply PCB When the fan motor speed is less than 1/3 of the target fan speed for 56 seconds.
  • Page 19 Indicate or Display: Trouble shooting 17 INDOOR UNIT Error Method: Error code : 53 Outdoor unit : No indication Drain Pump Error Detective details: Detective Actuators: Indoor unit Controller PCB Circuit When Float switch is ON for more than 3 minutes. Float switch Forecast of Cause : 1.
  • Page 20 Trouble shooting 18 Indicate or Display: OUTDOOR UNIT Error Method: Outdoor unit main PCB model Outdoor unit : No indication Error code : 62 information error Detective Actuators: Detective details: Access to EEPROM failed due to some cause after outdoor unit started. Outdoor unit Main PCB Forecast of Cause: 1.
  • Page 21 Trouble shooting 19 Indicate or Display: OUTDOOR UNIT Error Method: Error code : 63 Outdoor unit : No indication Inverter error Detective Actuators: Detective details: Outdoor unit Main PCB Error information received from Outdoor unit Main PCB Forecast of Cause : 1.
  • Page 22 Indicate or Display: Trouble shooting 20 OUTDOOR UNIT Error Method: Outdoor unit : No indication Error code : 64 PFC circuit error Detective Actuators: Detective details: When inverter output DC voltage is higher than 420V for over 3 seconds, Outdoor unit Main PCB the compressor stops.
  • Page 23 Trouble shooting 21 Indicate or Display: OUTDOOR UNIT Error Method: Outdoor unit : No indication Error code : 65 Trip terminal L error Detective Actuators: Detective details: Outdoor unit Main PCB When the signal from FO terminal of IPM is "L"(=0V) while the compressor stops.
  • Page 24 Trouble shooting 22 Indicate or Display: OUTDOOR UNIT Error Method: Error code : 71 Outdoor unit : No indication Discharge Thermistor Error Detective Actuators: Detective details: Discharge temperature thermistor Discharge temperature thermistor short or open detected Forecast of Cause : 1.
  • Page 25 Trouble shooting 24 Indicate or Display: OUTDOOR UNIT Error Method: Error code : 73 Outdoor unit : No indication Heat Ex. Outlet / Middle Temp. Thermistor Error Detective Actuators: Detective details: Heat exchanger Outlet / Middle temperature Heat exchanger outlet temperature thermistor short or open detected thermistor Heat exchanger middle temperature thermistor short or open detected Forecast of Cause :...
  • Page 26 Trouble shooting 25 Indicate or Display: OUTDOOR UNIT Error Method: Error code : 74 Outdoor unit : No indication Outdoor Thermistor Error Detective Actuators: Detective details: Outdoor temperature thermistor Outdoor temperature thermistor short or open detected Forecast of Cause : 1.
  • Page 27 Trouble shooting 27 Indicate or Display: OUTDOOR UNIT Error Method: Error code : 84 Outdoor unit : No indication Current sensor error Detective Actuators: Detective details: 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.
  • Page 28 Trouble shooting 29 Indicate or Display: OUTDOOR UNIT Error Method: Error code : 94 Outdoor unit : No indication 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 29 Trouble shooting 30 Indicate or Display: OUTDOOR UNIT Error Method: Compressor rotor position Outdoor unit : No indication Error code : 95 detection error Detective details: Detective Actuators: Outdoor unit Main PCB "Protection stop by "overcurrent generation at inverter compressor starting" Compressor restart"...
  • Page 30 Indicate or Display: Trouble shooting 31 OUTDOOR UNIT Error Method: Error code : 97 Outdoor unit : No indication 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 31 Indicate or Display: Trouble shooting 32 OUTDOOR UNIT Error Method: Error code : 99 Outdoor unit : No indication 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 32 Trouble shooting 33 Indicate or Display: OUTDOOR UNIT Error Method: Error code : A1 Outdoor unit : No indication Discharge Temp. Error Detective Actuators: Detective details: °C "Protection stop by "discharge temperature during compressor Discharge temperature thermistor operation'''' generated 2 times within 24 hours. Forecast of Cause : 1.
  • Page 33 2-3 TROUBLESHOOTING WITH NO ERROR CODE Forecast of Cause: Trouble shooting 34 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. >>If abnormal condition is found, correct it by referring to Installation Manual or Data &...
  • Page 34 Forecast of Cause: Trouble shooting 35 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 35 Trouble shooting 36 Forecast of Cause: 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 36 Forecast of Cause: Trouble shooting 37 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 37 Forecast of Cause : Trouble shooting 38 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 38 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 Is there open or loose connection Check if vibration noise by Is there open or loose connection cable?
  • Page 39 SERVICE PARTS INFORMATION 2 Inverter Compressor Check Point 1 : Check Connection Check terminal connection of Compressor (loose or incorrect wiring) Terminal cover opened Main PCB W(C) U(R) (BLACK) (RED) W400 W401 W402 V(S) (WHITE) BLACK WHITE Compressor Check Point 2 : Check Winding Resistance Check winding resistance of each terminal If the resistance value is 0 or infinite, replace Compressor.
  • Page 40 SERVICE PARTS INFORMATION 3 Outdoor unit Electronic Expansion Valve ( EEV ) Check Point 1 : Check Connections Check connection of connector ( Loose connector or open cable ) EXPANSION VALVE COIL BLUE ORANGE YELLOW WHITE Check Point 2 : Check Coil of EEV Check Point 3 : Check Noise at start up Remove connector, check each winding Turn on Power and check operation noise.
  • Page 41 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 unit Fan Motor Refer to below.
  • Page 42 SERVICE PARTS INFORMATION 8 Thermistor Check Point : Check Thermistor resistance value Remove connector and check Thermistor resistance value. Resistance Value [ k ] Temperature [°C] Thermistor A Thermistor B Thermistor C 1013.1 95.6 224.3 531.6 50.3 115.2 292.9 27.8 62.3 168.6 16.1...
  • Page 43 3-3-17,Suenaga,Takatsu-ku,Kawasaki 213-8502,Japan Aug. 2019 Printed in Japan...

This manual is also suitable for:

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