Fujitsu ARU7RLF Service Instruction

Also see for AGU12RLF: Design & technical manual Service manual Service instructions Service instructions Design & technical manual

92.3 49.2 27.5 16.1 9.7 6.1 3.9 2.61.8 1.2 0.9 0.6 0.5 0.4Trouble shooting 22OUTDOOR UNIT Error Method:Indicate or Display:Detective Actuators: Detective details:Forecast of Cause :Check Point 2 :Check Point 3 :Heat Sink Thermistor ErrorOutdoor Unit Main PCB CircuitHeat Sink Temperature ThermistorWhen Heat Sink Temperature Thermistor open or short-circuit isdetected 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.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.02-26THERMISTOR(DISCHARGE)BROWNCN25 CN26 CN23 CN22 CN211 2Refer to error code table.BROWN1 2104°FResistance Value (k )86°F-22°FTemperature(°F)Resistance Value (k )140°FTemperature(°F) 122°F 212°F194°F176°F158°F-4°F 14°F 32°F 50°F 68°FTHERMISTOR(COMPRESSOR)1 2 1 2 1 2BLUEBLACKBLACKTHERMISTOR(HEAT SINK)THERMISTOR(OUTDOOR)THERMISTOR(PIPE)OKOK