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  • #1175
    theachub_m40wgrTheAChub
    Keymaster

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      Power Supply Insufficient or Instantaneous Abnormality

      Error Code       U2

      Applicable

      Models

      REYQ-T
      Method of Error

      Detection

      Detect the voltage of capacitor of the main circuit in the inverter PCB.
      Error Decision

      Conditions

      When the voltage in the DC circuit (between diode module and power module) falls below 380VDC.
      Supposed

      Causes

      „

      „

      Abnormal power supply voltage

      Instantaneous power failure

      „ Open phase
      „ Defective inverter PCB
      „ Defective control PCB
      „ Defective compressor
      „ Defective main circuit wiring
      „ Defective fan motor
      „ Defective connection of signal cable

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