Fujitsu ASU12RL2, AOU12RL2, AOU09RL2 manual Outdoor Unit No Power

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Trouble shooting 20

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 & Technical Manual.

OK

Check Point 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.

OK

Check Point 3 : Check Electrical Components

Check the voltage of power supply.	NO

>>Check if AC103 - 127V appears at Outdoor Unit Terminal L - N.

YES

Check Fuse in Main PCB.

>>If Fuse is open, check if the wiring between Terminal and Main PCB is loose, and replace Fuse.

Check Varistor in Main PCB.

>>If Varistor is defective, there is a possibility of an abnormal power supply. Check the correct power supply and replace Varistor.

Upon checking the normal power supply, replace Varistor.

OK

If the symptom does not change by above Check 3, replace Main PCB.

02-22

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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