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  • July 7, 2024 at 1:57 pm #1084
    theachub_m40wgrTheAChub
    Keymaster

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      Actuation of Low Pressure Sensor

      Error Code         E4

      Applicable

      Models

      		 REYQ-T
      Method of Error

      Detection

      		 Make judgement of pressure detected by the low pressure sensor with the control PCB.
      Error Decision

      Conditions

      		 When low pressure caused a drop while the compressor is in operation: „ Operating pressure: 0.07 MPa (23.4 ftH2O)
      Supposed

      Causes

      		 „

      „

      		 Abnormally drop in low pressure Defective low pressure sensor
      „ Defective outdoor unit PCB
      „ The stop valve is not opened
      Troubleshooting

      : Eliminate factors that cause the low pressure to decrease.

       Note:            ∗1. Make a comparison between voltage measured by the pressure sensor and that read by the pressure gauge.

      (The pressure sensor makes measurement of voltage at its connector block to convert it to pressure. CHECK 12 ) CHECK 2

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