Fujitsu ASU12RL2 Check Point 2 Check connection of Connector, Check Point 3 Replace Main PCB

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Trouble shooting 8 OUTDOOR UNIT Error Method:

PFC circuit error

Indicate or Display:

Refer to error code table.

Detective Actuators:

Outdoor unit Main PCB

Detective details:

When inverter output DC voltage is higher than 415V for over 3 seconds, the compressor stops.

If the same operation is repeated 5 times, the compressor stops permanently.

Forecast of Cause :

1. External cause 2. Connector connection failure 3. Main PCB failure

Check Point 1 : 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.

OK

Check Point 2 : Check connection of Connector

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 3 : Replace Main PCB

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

02-10

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Contents Service Instruction Contents Appending Data Page Wall Mounted type Cooling Operation DRY Operation Heating Operation01-03 Auto Changeover OperationFan speed Indoor FAN ControlFAN Operation Cooling OperationCool AIR Prevention Control Heating mode Moisture Return Prevention Control Cooling mode& Dry modeHeating Operation Outdoor Fan Motor Outdoor FAN ControlLouver Control Adjust the RIGHT-LEFT LouversVertical Louver Control Function RangeCompressor Control Limitation of Compressor Frequency by Outdoor TemperatureOpeartion Frequency Range Opeartion Frequency Control AT Normal Start UPProgram Timer Timer Opeartion ControlSleep Timer Cooling operation modeHeating operation mode FOUR-WAY Valve Extension Select Prevent to Restart for 3 Minutes 3 Minutes STAuto Restart 24C 75FForced Cooling Operation Test Operation Powerful OperationCompressor Preheating Economy OperationCondition of Starting the Defrost Operation Defrost Operation ControlCondition of the Defrost Operation Completion Release ConditionDefrost Flow Chart Normal defrost Integrating defrost01-14 Defrost end 01-15 OFF Defrost Opeartion ControlVarious Protections Discharge GAS Temperature Overrise Prevension ControlCurrent Release Control 01-16Antifreezing Control Cooling and Dry mode High Temperature Release Control Heating ModeCooling Pressure Overrise Protection Trouble Shooting Error Display TroubleshootingTrouble Shooting with Error Code Check Point 4 Check Serial Signal Reverse Transfer SignalOutdoor unit Main PCB Indoor unit Controller PCB Indoor unit Fan motor Check Point Check Indoor unit electric components Indoor unit Controller PCBCheck Point Check external cause such as noise Check Point 3 Replace Controller PCBCheck Point 2 Replace Controller PCB Indoor unit Controller PCB Indicator PCB Manual auto switchIndoor unit Controller PCB Room temperature thermistor Indoor unit Controller PCB Heat Ex. temperature thermistor Check Point 3 Check Indoor unit fan motor Check Point 2 Check ambient temp. around motorCheck Point 1-2 Check external cause Check Point 2 Replace Main PCBCheck Point 3 Replace Main PCB Check Point 2 Check connection of Connector02-11 CN71 CN70 Outdoor unit Main PCB Discharge pipe temperature thermistorResistance Value k 606 759 213 8531 Outdoor unit Main PCB Heat exchanger temperature thermistorOutdoor unit Main PCB Outdoor temperature thermistor Check Point 4 Replace Main PCB Outdoor unit Main PCB Compressor Check Point 2 Check Heat exchangerCheck Point 3 Check Compressor Check Point 3 Replace Main PCB Outdoor unit Main PCB Outdoor unit Fan motor Check Point 3 Check Outdoor unit fan motorCheck Point 4 Check Output Voltage of Main PCB Check Point 3 Check the solenoid coil and 4-way valve Check Point 2 Check each thermistorForecast of Cause Trouble Shooting with no Error Code Indoor Unit No PowerCheck Point 3 Check Electrical Components Outdoor Unit No Power 02-23 No Cooling / No Heating Check Point Check Indoor/ Outdoor installation conditionCheck Point 2 Check Outdoor unit operation Check Point 3 Check Site conditionWater Leaking Abnormal NoiseService Parts Information CompressorReplace Compressor Inverter Compressor Outdoor unit Electronic Expansion Valve EEV Blue RedCheck Point 5 Check Opening and Closing Operation of Valve Outdoor unit fan motor Indoor unit fan motorPage Appending Data Setting the Filter Sign Function SettingCooling Room Temperature Correction Heating Room Temperature CorrectionSetting the Auto Restart Remote controller signal codeYes Procedures to change the Function Setting for wireless RC Selecting the Function Number and Setting Value Remote Controller Signal Code Setting Discharge thermistor Room temperature thermistorPage 1116,Suenaga,Takatsu-ku,Kawasaki 213-8502,Japan