ESIE05-03 Error Codes: Indoor UnitsPart 3 – Troubleshooting 3–5345132.8 Thermistor Abnormality (C4, C5, C9)Error code The table below describes the two thermistor abnormalities.LED indications The table below shows the LED indications.Error generation The error is generated when during compressor operation:P Thermistor input > 4.96 V, orP Thermistor output < 0.04 V.Causes The possible causes are:P Malfunctioning connector connectionP Malfunctioning thermistorP Malfunctioning PCBP Broken or disconnected wire.CheckingthermistorsSee page 3–106.Error DescriptionC4 Malfunctioning heat exchanger thermistor system.C5 Malfuncioning gaspipe thermistor system.C9 Malfunctioning suction air thermistor system.Operation HAP (green) HBP (green)Normal c cMalfunctioning c c
