Fujitsu AOU09RL2, ASU12RL2, AOU12RL2 manual Outdoor unit Main PCB, Check Point 4 Replace Main PCB

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Trouble shooting 13 OUTDOOR UNIT Error Method:

Current sensor error

Indicate or Display:

Refer to error code table.

Detective Actuators:

Outdoor unit Main PCB

Detective details:

When Input Current Sensor has detected 0A, while Inverter Compressor is operating at higher than 56rps, after 1minute upon starting the Compressor. (Except during the defrost operation)

Forecast of Cause :
1. Defective connection of electric components	2. External cause	3. Main PCB failure

Check Point 1-1 : Reset Power Supply and operate

Does Error indication show again?

YES

NO

Check Point 2 :

Check connections of Outdoor Unit Electrical Components

Check if the terminal connection is loose.

Check if connector is removed.

Check erroneous connection.

Check if cable is open.

>>Upon correcting the removed connector or mis-wiring, reset the power.

OK

Check Point 1-2 :

Check external cause at Indoor and Outdoor (Voltage drop or Noise)

Instant drop : Check if there is a large load electric apparatus in the same circuit.

Momentary power failure : Check if there is a defective contact or leak current in the power supply circuit.

Noise : Check if there is any equipment causing harmonic wave near electric line.(Neon bulb or electric equipment that may cause harmonic wave) Check the complete insulation of grounding.

Check Point 4 : Replace Main PCB

If Check Point 1, 2 do not improve the symptom, change Main PCB.

02-15

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Contents Service Instruction Contents Appending Data Page Wall Mounted type Cooling Operation Heating Operation DRY OperationAuto Changeover Operation 01-03FAN Operation Indoor FAN ControlFan speed Cooling OperationHeating Operation Cool AIR Prevention Control Heating modeMoisture Return Prevention Control Cooling mode& Dry mode Outdoor FAN Control Outdoor Fan MotorVertical Louver Control Adjust the RIGHT-LEFT LouversLouver Control Function RangeOpeartion Frequency Range Limitation of Compressor Frequency by Outdoor TemperatureCompressor Control Opeartion Frequency Control AT Normal Start UPTimer Opeartion Control Program TimerHeating operation mode Sleep TimerCooling operation mode Auto Restart Prevent to Restart for 3 Minutes 3 Minutes STFOUR-WAY Valve Extension Select 24C 75FCompressor Preheating Powerful OperationForced Cooling Operation Test Operation Economy OperationCondition of the Defrost Operation Completion Defrost Operation ControlCondition of Starting the Defrost Operation Release Condition01-14 Defrost Flow ChartNormal defrost Integrating defrost OFF Defrost Opeartion Control Defrost end 01-15Current Release Control Discharge GAS Temperature Overrise Prevension ControlVarious Protections 01-16Cooling Pressure Overrise Protection Antifreezing Control Cooling and Dry modeHigh Temperature Release Control Heating Mode Trouble Shooting Troubleshooting Error DisplayOutdoor unit Main PCB Trouble Shooting with Error CodeCheck Point 4 Check Serial Signal Reverse Transfer Signal Indoor unit Controller PCB Indoor unit Fan motor Check Point Check external cause such as noise Indoor unit Controller PCBCheck Point Check Indoor unit electric components Check Point 3 Replace Controller PCBIndoor unit Controller PCB Indicator PCB Manual auto switch Check Point 2 Replace Controller PCBIndoor unit Controller PCB Room temperature thermistor Indoor unit Controller PCB Heat Ex. temperature thermistor Check Point 2 Check ambient temp. around motor Check Point 3 Check Indoor unit fan motorCheck Point 2 Replace Main PCB Check Point 1-2 Check external causeCheck Point 2 Check connection of Connector Check Point 3 Replace Main PCB02-11 Outdoor unit Main PCB Discharge pipe temperature thermistor CN71 CN70Outdoor unit Main PCB Heat exchanger temperature thermistor Resistance Value k 606 759 213 8531Outdoor unit Main PCB Outdoor temperature thermistor Check Point 4 Replace Main PCB Check Point 3 Check Compressor Outdoor unit Main PCB CompressorCheck Point 2 Check Heat exchanger Check Point 3 Replace Main PCB Check Point 4 Check Output Voltage of Main PCB Outdoor unit Main PCB Outdoor unit Fan motorCheck Point 3 Check Outdoor unit fan motor Check Point 2 Check each thermistor Check Point 3 Check the solenoid coil and 4-way valveForecast of Cause Check Point 3 Check Electrical Components Trouble Shooting with no Error CodeIndoor Unit No Power Outdoor Unit No Power 02-23 Check Point 2 Check Outdoor unit operation Check Point Check Indoor/ Outdoor installation conditionNo Cooling / No Heating Check Point 3 Check Site conditionAbnormal Noise Water LeakingReplace Compressor Service Parts InformationCompressor Inverter Compressor Check Point 5 Check Opening and Closing Operation of Valve Outdoor unit Electronic Expansion Valve EEVBlue Red Indoor unit fan motor Outdoor unit fan motorPage Appending Data Cooling Room Temperature Correction Function SettingSetting the Filter Sign Heating Room Temperature CorrectionYes Setting the Auto RestartRemote controller signal code Procedures to change the Function Setting for wireless RC Selecting the Function Number and Setting Value Remote Controller Signal Code Setting Room temperature thermistor Discharge thermistorPage 1116,Suenaga,Takatsu-ku,Kawasaki 213-8502,Japan