Fujitsu ARU7RLF Service Instruction

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

Trouble shooting 32 Forecast of Cause:Check Point 2 : Check external cause at Indoor and Outdoor (Voltage drop or Noise)Check Point 1 : Check indoor and outdoor installation conditionCheck Point 3 : Check Wired Remote Controller and Controller PCBOKOKNo Operation (Power is ON) 1. Setting/ Connection failure 2. External cause3. Electrical Component defectiveIndoor Unit - Check incorrect wiring between Indoor Unit - Remote Control.Or, check if there is an open cable connection.Are these Indoor unit, Outdoor unit, and Remote control suitable model numbers to connect?>> If there is some abnormal condition, correct it by referring to Installation manual andData & Technical Manual.Turn off Power and check/ correct followings.Is there loose or removed communication line of Indoor unit and Outdoor unit?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.>> If it is DC12V, Remote Control is failure. (Controller PCB is normal) >> Replace Remote Control>> If it is DC 0V, Controller PCB is failure. (Check Remote Control once again)>> Check Indoor unit fan motor. (PARTS INFORMATION 4)If it is normal, replace Controller PCB.If it is abnormal, replace Indoor unit fan motor and Controller PCB.>> If the symptom does not change by above Check 1, 2, 3, replace Main PCB of Outdoor unit.02-36Check Voltage at terminal 1-3 of Controller PCB or Communication PCB.(Power supply to Remote Control)Cassette, Duct Type : CN14Wall mount Type : CN6Conpact Wall mount Type : CN305(UTY-XCBXZ1)OKOK