ESIE05-03 Error Codes: Outdoor UnitsPart 3 – Troubleshooting 3–93334513.23 Abnormal Power Supply Voltage (U2)Remote ControllerDisplayU2Method ofMalfunctionDetectionMalfunction is detected according to the voltage of main circuit capacitor built in the inverter and powersupply voltage.MalfunctionDecisionConditionsWhen the voltage of main circuit capacitor built in the inverter and power supply voltage drop (150-170VAC) or when the power failure of several tons of ms or longer is generated.* Remote controller does not decide the abnormality.Supposed Causes P Drop in power supply voltage (180 V or less)P Instantaneous power failureP Inverter open phase (Phase T)P Faulty main circuit wiringP Faulty outdoor unit PC boardP Main circuit parts damaged
