Fujitsu ASYG09KMCB Service Instruction
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Fujitsu ASYG09KMCB Service Instruction

Wall-mounted type, inverter
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Split type room air conditioner
Wall-mounted type
Inverter
SERVICE
INSTRUCTION
Indoor unit
ASYG09KMCB
ASYG12KMCB
ASYG14KMCB
Outdoor unit
AOYG09KMCBN
AOYG12KMCBN
AOYG14KMCBN

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Summary of Contents for Fujitsu ASYG09KMCB

  • Page 1 Split type room air conditioner Wall-mounted type Inverter SERVICE INSTRUCTION Indoor unit Outdoor unit ASYG09KMCB AOYG09KMCBN AOYG12KMCBN ASYG12KMCB ASYG14KMCB AOYG14KMCBN...

  • Page 2: Table Of Contents

    CONTENTS 1. DESCRIPTION OF EACH CONTROL OPERATION 1. COMPRESSOR CONTROL............. 01-01 2. AUTO CHANGEOVER OPERATION..........01-05 3. INDOOR FAN CONTROL..............01-06 4. OUTDOOR FAN CONTROL............. 01-10 5. LOUVER CONTROL................. 01-12 6. TIMER OPERATION CONTROL............01-14 7. DEFROST OPERATION CONTROL..........01-16 8.

  • Page 3: Description Of Each Control Operation

    Wall-mounted type INVERTER 1 . DESCRIPTION OF EACH CONTROL OPERATION...

  • Page 4: Compressor Control

    1. COMPRESSOR CONTROL 1. COMPRESSOR FREQUENCY AT NORMAL START-UP Compressor frequency soon after starting is controlled as below. Maximum frequency 99 rps 90 rps 77 rps 56 rps 40 rps Time 60 sec 240 sec 280 sec 360 sec 400 sec Forced 40 rps operation for 60 seconds from start-up Compressor...
  • Page 5 2. COOLING OPEARTION A sensor (room temperature thermistor) built in the indoor unit body will usually perceive difference or variation between set temperature and present room temperature, and controls the operation frequency of the compressor. If the room temperature is 2°C higher than set temperature, the compressor operation frequency will attain to maximum performance.
  • Page 6 3. HEATING OPERATION A sensor (room temperature thermistor) built in the indoor unit body will usually perceive difference or variation between set temperature and present room temperature, and controls the operation frequency of the compressor. If the room temperature is 3°C lower than set temperature, the compressor operation frequency will attain to maximum performance.
  • Page 7 4. DRY OPERATION In dry operation, maximum compressor frequency is defined by set temperature, and room temperature as below. Zone is defined by set temperature and room temperature. Room temperature rises Room temperature drops X zone Ts+1.5°C Ts+0.5°C J zone Ts -0.5°C Ts -1.5°C Y zone...

  • Page 8: Auto Changeover Operation

    2. AUTO CHANGEOVER OPERATION When the air conditioner is set to the AUTO mode by remote control, operation starts in the optimum When air conditioner is set to AUTO mode by remote control, mode from among the Heating, Cooling, Dry and Monitoring modes. operation starts in the optimum mode from among heating, During operation, the optimum mode is automatically switched in accordance with temperature changes.

  • Page 9: Indoor Fan Control

    3. INDOOR FAN CONTROL 1. FAN SPEED Indoor fan speed is defined as below. Speed Operation mode Air flow mode ASYG09/12KMCB ASYG14KMCB Powerful 1,380 rpm 1,420 rpm Heating 1,320 rpm 1,360 rpm 1,280 rpm 1,330 rpm 1,160 rpm 1,220 rpm 980 rpm 1,040 rpm Quiet...
  • Page 10 2. FAN OPERATION Airflow can be switched in 5 steps such as Auto, Quiet, Lo, Me, Hi, while indoor unit fan only runs. When fan mode is set at (Auto), it operates on (Me) fan speed. 3. COOLING OPERATION Switch the airflow [Auto], and indoor fan motor will run according to room temperature, as below.
  • Page 11 5. HEATING OPERATION Switch the airflow [AUTO], and the indoor fan motor will run according to a room temperature, as below. 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, Hi, as the previous page.
  • Page 12 7. MOISTURE RETURN PREVENTION CONTROL (COOLING AND DRY MODE) Switch the airflow [Auto] at cooling mode, and the indoor fan motor will run as shown in Fig. Fig. : Indoor fan control Compressor Indoor fan Setting air flow Indoor fan (as shown in the t able) S-Lo (sec)

  • Page 13: Outdoor Fan Control

    4. OUTDOOR FAN CONTROL 1. OUTDOOR FAN MOTOR This outdoor unit has a DC fan motor. (Control method is different between AC and DC motors.) When fan motor starts to run, it keeps 500 rpm for 20 seconds. Fan motor MFE-S60VB2F 2.
  • Page 14 3. FAN SPEED IN HEATING OPERATION In heating operation, fan speed is defined by compressor frequency. Fan step Fan speed S-Hi2 1,100 rpm S-Hi1 1,100 rpm 1,100 rpm 1,100 rpm 1,100 rpm 850 rpm 760 rpm 670 rpm 510 rpm 470 rpm 420 rpm 420 rpm...

  • Page 15: Louver Control

    5. LOUVER CONTROL 1. VERTICAL LOUVER CONTROL Whenever button is pressed, air direction will change as below. Remote control display is not changed. When you set the angle to position 4.7 for more than 30 minutes in cooling or dry operation, they automaticaly returnto position 3.
  • Page 16 2. SWING OPERATION When swing signal is received from remote control, vertical louver starts to swing. Table : Swinging range Range Cooling / Dry mode Fan mode ( The SWING operation may stop temporarily when the air conditioner’s fan is not operating, or when operating at very low speeds.

  • Page 17: Timer Operation Control

    6. TIMER OPERATION CONTROL 6-1 WIRELESS REMOTE CONTROL 1. OPERATION FREQUENCY RANGE OFF timer : When clock reaches set time, air conditioner will be turned off. Operation mode Stop mode Set time of timer ON timer : When clock reaches set time, air conditioner will be turned on.
  • Page 18 3. SLEEP TIMER When sleep is set, room temperature is monitored and operation is stopped automatically. When operation mode or set temperature is changed after the sleep timer is set, operation is continued according to the changed setting of the sleep timer from that time ON. In cooling operation When sleep timer is set, the set temperature is increased 1°C.

  • Page 19: Defrost Operation Control

    7. DEFROST OPERATION CONTROL 1. CONDITION OF STARTING DEFROST OPERATION Defrost operation starts when outdoor heat-exchanger temperature sensor (Tn) detects the temperature lower than the values shown below. Ta : Outdoor temperature 1st time defrosting after starting operation Compressor integrating Less than 22 min.
  • Page 20 3. DEFROST FLOWCHART 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) Integrating defrost 1st defrost 2nd and later defrost (Constant monitoring) Compressor Compressor...

  • Page 21: Off Defrost Operation Control

    8. OFF DEFROST OPEARTION CONTROL If the outdoor unit is frosted when stopping the heating operation, it stops after performing the automatic defrosting operation. In this time, if indoor unit operation lamp flashes slowly (7 sec ON / 2 sec OFF), outdoor unit will allow heat-exchanger to defrost, and then stop.

  • Page 22: Various Control

    9. VARIOUS CONTROL 1. 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 table. The compressor frequency, the temperatures detected by the discharge temperature sensor, the indoor heat exchanger sensor, the outdoor heat exchanger sensor, and the outdoor temperature sensor.
  • Page 23 5. 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 24 8. 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 temperature rises to 7°C or greater, preheating is ended.
  • Page 25 12. POWERFUL OPERATION POWERFUL OPERATION functions by pressing POWERFUL button on remote control. Indoor unit and outdoor unit will operate at the maximum power. COMPRESSOR FREQUENCY Maximum FAN CONT. MODE Powerful SETTING LOUVER Cooling/ Dry : 3, Heating : 6 Release condition is as follows.

  • Page 26: Various Protections

    10.VARIOUS PROTECTIONS 1. DISCHARGE GAS TEMPERATURE OVERRISE PREVENSION CONTROL (Discharge release) Discharge gas temperature sensor (discharge thermistor : outdoor side) will detect discharge gas temperature. When discharge temperature becomes higher than 104°C, compressor frequency is decreased 20rps, and it continues to decrease the frequency for 20rps every 120 seconds until temperature becomes lower than 101°C.
  • Page 27 2. CURRENT RELEASE CONTROL Compressor frequency is controlled so that the outdoor unit input current does not exceeds current limit value that was set up with outdoor temperature. Compressor frequency returns to the designated frequency of indoor unit at the time when the frequency becomes lower than the release value. Current release operation value / Release value OT : Outdoor temperature Heating operation...

  • Page 28: Troubleshooting

    WALL-MOUNTED type INVERTER 2 . TROUBLESHOOTING...

  • Page 29: Error Display

    1. ERROR DISPLAY 1. INDOOR UNIT DISPLAY When you use a wireless remote control, lamp on the photo detector unit will output error codes by way of blinking patterns. When you use a wired remote control, error codes will appear on remote control display. See lamp blinking patterns and error code table.
  • Page 30 2. WIRED REMOTE CONTROL 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 31 3. ERROR CODE TABLE Please refer the flashing pattern as follows. The OPERATION, TIMER and ECONOMY indicators operate as follows according to the error contents. Indoor Unit Display Wired Remote Trouble Error Contents Control shooting ECONOMY OPERATION TIMER Display (Green) (Orange) (Green) Serial communication error...

  • Page 32: Troubleshooting With Error Code

    2. TROUBLESHOOTING WITH ERROR CODE Troubleshooting 1-1 Serial communication error (Serial reverse transfer error) OUTDOOR UNIT Error Method: 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 the serial signal more than 15seconds during normal operation.
  • Page 33 Troubleshooting 1-2 Serial communication error (Serial forward transfer error) INDOOR UNIT Error Method: Detective Actuators: Detective details: Indoor unit Controller PCB When the outdoor unit cannot receive the serial signal from Indoor unit more than 10seconds. Indoor unit Fan motor Outdoor unit Main PCB Forecast of cause: 1.
  • Page 34 Troubleshooting 2 Remote control communication error INDOOR UNIT Error Method: Detective actuators: Detective details: 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 35 Troubleshooting 3 Indoor unit main PCB error INDOOR UNIT Error Method: Detective actuators: Detective details: When power is on and there is some below case. Indoor unit controller PCB 1. When model information of EEPROM is incorrect. 2. When the access to EEPROM failed. Forecast of cause: 1.
  • Page 36 Troubleshooting 4 Manual auto switch error INDOOR UNIT Error Method: 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 : 1.
  • Page 37 Troubleshooting 5 Room temperature sensor error INDOOR UNIT INDOOR UNIT Error Method: Detective actuators: Detective details: Indoor unit controller PCB When Room Temperature Thermistor open or short-circuit is detected. Room temperature thermistor Forecast of cause : 1. Connector connection failure 2.Thermistor failure 3.
  • Page 38 Troubleshooting 6 Indoor unit heat-exchanger sensor error INDOOR UNIT Error Method: Detective actuators: Detective details: Indoor unit controller PCB When heat-exchanger temperature thermistor Heat Ex. temperature thermistor open or short-circuit is detected. Forecast of cause : 1. Connector connection failure 2.Thermistor failure 3.
  • Page 39 Troubleshooting 7 Indoor unit fan motor error INDOOR UNIT Error Method: 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 40 Troubleshooting 8 Outdoor unit main PCB error OUTDOOR UNIT Error Method: Detective details: Detective actuators: Access to EEPROM failed due to some cause after outdoor unit started. Outdoor unit main PCB Forecast of cause: 1. External cause (Noise, temporary open, voltage drop) 2.
  • Page 41 Troubleshooting 9 PFC circuit error OUTDOOR UNIT Error Method: Detective actuators: Detective details: When inverter output DC voltage is higher than 415V for over 3 seconds, Outdoor unit main PCB the compressor stops. If the same operation is repeated 5 times, the compressor stops permanently. Forecast of cause : 1.
  • Page 42 Troubleshooting 10 IPM error OUTDOOR UNIT Error Method: Detective details: Detective actuators: When more than normal operating current to IPM in Main PCB flows, Outdoor unit main PCB the compressor stops. Compressor After the compressor restarts, if the same operation is repeated within 40sec, the compressor stops again.
  • Page 43 Troubleshooting 11 Discharge thermistor error OUTDOOR UNIT Error Method: 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 Troubleshooting 12 Outdoor unit heat-exchanger sensor error OUTDOOR UNIT Error Method: 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. Forecast of cause : 1.
  • Page 45 Troubleshooting 13 Outdoor thermistor error OUTDOOR UNIT Error Method: 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 Troubleshooting 14 Current sensor error OUTDOOR UNIT Error Method: 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 Troubleshooting 15 Trip detection OUTDOOR UNIT Error Method: Detective actuators: Detective details: "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 Troubleshooting 16 Compressor motor control error OUTDOOR UNIT Error Method: Detective details: Detective actuators: If it does not succeed even if the compressor is started 50 times, Outdoor unit Main PCB it will become 3 minutes ST. Compressor If it does not succeed even after repeating this 3 sets, the compressor will stop permanently.
  • Page 49 Troubleshooting 17 Outdoor unit fan motor error OUTDOOR UNIT Error Method: Detective details: Detective actuators: When outdoor fan rotation speed is less than 100rpm in 20 seconds Outdoor unit main PCB after fan motor starts, fan motor stops. Outdoor unit fan motor After fan motor restarts, if the same operation within 60sec is repeated 3 times in a row, compressor and fan motor stops.
  • Page 50 Troubleshooting 18 4-way valve error INDOOR UNIT Error Method: 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. temperature thermistor continuously two times, the compressor stops. Room temperature thermistor Cooling or Dry operation 4-way valve...
  • Page 51 Troubleshooting 19 Discharge temperature error OUTDOOR UNIT Error Method: Detective actuators: Detective details: 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. 2,3-way valve not opened 2.

  • Page 52: Troubleshooting With No Error Code

    3. TROUBLESHOOTING WITH NO ERROR CODE Troubleshooting 20 Indoor unit - No power Forecast of cause: 1. Power supply failure 2. External cause 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 Troubleshooting 21 Outdoor unit - No power Forecast of cause: 1. Power supply failure 2. External cause 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 Troubleshooting 22 No operation (Power is ON) Forecast of cause: 1. Setting/ Connection failure 2. External cause 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 Troubleshooting 23 No cooling / No heating Forecast of cause: 1. Indoor Unit error 2. Outdoor Unit error 3. Effect by surroun ding 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 Troubleshooting 24 Abnormal noise Forecast of cause : 1. Abnormal installation (Indoor/ Outdoor) 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: Parts Information

    4. PARTS INFORMATION PARTS INFORMATION 1 Compressor Diagnosis method of Compressor ( If Outdoor Unit LED displays Error, refer to troubleshooting ) Stops soon after starting up Does not start up Abnormal noise Check if vibration noise by Is there open or loose connection Is there open or loose connection loose bolt or contact noise cable?
  • Page 58 PARTS INFORMATION 2 Inverter compressor Check Point 1 : Check c onnection Check terminal connection of Compressor (loose or incorrect wiring) GLASS TERMINAL Check Point 2 : Check winding resistance Check winding resistance of each terminal If the resistance value is 0 or infinite, replace Compressor.
  • Page 59 PARTS INFORMATION 3 Outdoor unit, electronic expansion valve (EEV) Check Point 1 : Check Connections Check connection of connector (P30) ( Loose connector or open cable ) EXPANSION VALVE COIL BLUE ORANGE YELLOW WHITE Check Point 3 : Check Noise at start up Check Point 2 : Check coil of EEV Remove connector, check each winding Turn on Power and check operation noise.
  • Page 60 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 3-3-17, Suenaga, Takatsu-ku, Kawasaki 213-8502, Japan 1809S0104...

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