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  • #1068
    theachub_m40wgrTheAChub
    Keymaster

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      Thermistor Abnormality

      Error Code

      C4, C5, C9
      Applicable

      Models

      		 All indoor models
      Method of Error

      Detection

      		 The error is detected by temperature detected by thermistor.
      Error Decision

      Conditions

      		 When the thermistor becomes disconnected or shorted while the unit is running.
      Supposed

      Causes

      		 „

      „

      		 Defective thermistor

      Defective indoor unit PCB
      „ Defective connector connection
      „ Broken or disconnected wire
      Troubleshooting

       Note:    ∗1. Error code and thermistor

      Error Code Thermistor Except FXTQ FXTQ
      C4 Heat exchanger liquid pipe thermistor R2T R1T
      C5 Heat exchanger gas pipe thermistor R3T R2T
      C9 Suction air thermistor R1T —

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