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  • July 7, 2024 at 2:41 pm #1183
    theachub_m40wgrTheAChub
    Keymaster

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      Transmission Error between Outdoor Units

      Error Code             U7

      Applicable

      Models

      		 REYQ-T
      Method of Error

      Detection

      		 Micro-computer checks if transmission between outdoor units is normal.
      Error Decision

      Conditions

      		 When transmission is not carried out normally for a certain amount of time
      Supposed

      Causes

      		 „ Connection error of transmission wirings between outdoor unit and external control adaptor for outdoor unit

      „ Connection error of transmission wirings between outdoor units

      „ Cool/Heat selection setting error

      „ Cool/Heat unified address setting error (functional unit, external control adaptor for outdoor unit) „ Defective outdoor unit PCB

      „ Defective external control adaptor for outdoor unit

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