Troubleshooting by Indication on the Remote Controller ESIE09-08146 Troubleshooting3.14 “E3” Indoor Unit: Actuation of High Pressure SwitchRemote ControlDisplayE3Subcode 12ApplicableModelsAll indoor unitsMethod ofMalfunctionDetectionAbnormality is detected when the contact of the high pressure protection switch opens.MalfunctionDecisionConditionsError is generated when the HPS activation count reaches the number specific to the operationmode.(Reference) Operating pressure of high pressure switchOperating pressure: 3.8MPaReset pressure: 2.7MPaSupposedCauses Actuation of indoor unit high pressure switch Defect of High pressure switch Defect of Indoor unit PC board (A4P) Faulty high pressure sensor Refrigerant blockage Water blockage Thermal cut out error (Q2L)Warning: CAPACITOR SHOCK HAZARD. The capacitors (top surfaces) can hold up to220V. Use correct precautions when servicing.
