Sharp AL1622 Error Codes List page 7 from 7

  • Code: U99
  • Description: Operation control PWB communication error
    Communication error between the operation control PWB and the MCU PWB (Detected by the OPE-PWB)
  • Causes: Disconnection or reverse connection of the flat cable between the Operation control PWB and the MCU PWB. Operation control PWB trouble MCU PWB trouble Connector trouble of the operation control PWB and the MCU PWB