Fujitsu AGU12RLF Service Instruction

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Trouble shooting 13OUTDOOR UNIT Error Method:Detective Actuators: Detective details:Forecast of Cause :Check Point 2 :6.09.612.416.121.027.8Resistance Value (k )Temperature (°F)OKOKOKOK3.80.60.81.21.72.5Resistance Value (k )Temperature (°F)Heat Ex.(Pipe) thermistor errorOutdoor unit Main PCBHeat exchanger thermistorWhen Heat exchanger temperature thermistor open orshort-circuit is detected at power ON or while running the compressor.1. Connector connection failure 2.Thermistor failure 3. Main PCB failureCheck Point 1 : Check connection of ConnectorCheck if connector is removed.Check erroneous connection.Check if thermistor cable is open.>>Upon correcting the removed connector or mis-wiring, reset the power.Check Point 2 : Remove connector and check Thermistor resistance valueThermistor Characteristics (Approx. value)If Thermistor is either open or shorted, replace it and reset the power.02-1823°F14°F176°F158°F140°F86°F68°F50°F41°F32°F 122°F104°FIndicate or Display:Refer to error code table.Check Point 3 :Check Point 3 : Check voltage of Main PCB (DC5.0V)Make sure circuit diagram of outdoor unit and check terminal voltage at Thermistor (DC5.0V)If the voltage does not appear, replace Main PCB.THERMISTOR(PIPE)THERMISTOR(DISCHARGE)THERMISTOR(OUTDOOR)BLACKBLACKBLACKBLACK12341234123123CN61CN62AOU15RLFFTHERMISTOR(PIPE)THERMISTOR(DISCHARGE)THERMISTOR(OUTDOOR)BLACKBLACKBROWNBROWNBLACKBLACK12341234123123CN71CN70AOU9/ 12RLFFBROWN or BLACKBROWN or BLACK