ESIE05-03 Error Codes: Indoor UnitsPart 3 – Troubleshooting 3–4345132.3 Malfunction of Drain Water Level System (A3)Error code A3LED indications The table below shows the LED indications.Error generation The error is generated when the water level reaches its upper limit and when the float switch turnsOFF.Causes The possible causes are:P Malfunctioning drain pumpP Improper drain piping workP Drain piping cloggingP Malfunctioning float switchP Malfunctioning indoor unit PCBP Malfunctioning short-circuit connector X15A on PCB.Operation HAP (green) HBP (green)Normal c cMalfunctioning c c
