What to do if Huawei Inverter displays String Reversed?
If your Huawei Inverter displays a String Reversed error, it means the PV string is reversely connected. Check whether the PV string is reversely connected to the SUN2000. If it is, wait until the PV string current decreases below 0.5 A, set the DC switch to OFF, and adjust the PV string polarity.
What to do if Huawei Inverter displays Grid Undervoltage?
If your Huawei Inverter displays a Grid Undervoltage alarm: * If the alarm occurs occasionally, the power grid may be temporarily abnormal. The SUN2000 will automatically recover once the power grid returns to normal. * If the alarm occurs frequently, check whether the power grid voltage is within the allowed range. If it is not, contact the local power operator. If it is, modify the grid undervoltage protection threshold via the mobile app, SmartLogger, or network management system (NMS) with the consent of the local power operator. * If the fault persists for a long time, check the connection between the AC switch and the output power cable.
What to do if Huawei 01075345 displays Grid Overvoltage?
If your Huawei Inverter displays a Grid Overvoltage alarm: * If the alarm occurs occasionally, the power grid may be temporarily abnormal. The SUN2000 will automatically recover once the power grid returns to normal. * If the alarm occurs frequently, check whether the power grid voltage is within the allowed range. If it is not, contact the local power operator. If it is, modify the grid overvoltage protection threshold via the mobile app, SmartLogger, or NMS with the consent of the local power operator. * Check whether the peak voltage of the power grid is too high. If the fault persists and cannot be rectified for a long time, contact the power operator.
What to do if Huawei 01075345 Inverter displays Grid Overfrequency?
If your Huawei Inverter displays a Grid Overfrequency alarm: * If the alarm occurs occasionally, the power grid may be temporarily abnormal. The SUN2000 will automatically recover once the power grid returns to normal. * If the alarm occurs frequently, check whether the power grid frequency is within the allowed range. If it is not, contact the local power operator. If it is, modify the grid overfrequency protection threshold through the mobile app, SmartLogger, or NMS with the consent of the local power operator.
What to do if Huawei Inverter displays Grid Underfrequency?
If your Huawei Inverter displays a Grid Underfrequency alarm: * If the alarm occurs occasionally, the power grid may be temporarily abnormal. The SUN2000 automatically recovers after detecting that the power grid becomes normal. * If the alarm occurs frequently, check whether the power grid frequency is within the allowed range. If no, contact the local power operator. If yes, modify the grid underfrequency protection threshold through the mobile app, SmartLogger, or NMS with the consent of the local power operator.
What to do if my Huawei 01075345 Inverter shows Low Insulation Resistance?
If your Huawei Inverter shows a Low Insulation Resistance error, it indicates a short circuit between the PV array and the ground, or that the ambient air of the PV array is damp, causing poor insulation. First, check the output impedance of the PV array to ground. If there is a short circuit or lack of insulation, rectify it. Second, check that the PE cable of the SUN2000 is correctly connected. Third, if the impedance is lower than the specified protection threshold in rainy and cloudy days, set Insulation resistance protection using the mobile app, SmartLogger, or NMS.
What does Active Islanding mean on my Huawei 01075345?
If your Huawei Inverter is showing Active Islanding, it means that the SUN2000 has proactively detected islanding when the power grid experiences an AC power outage. Check that the grid connection voltage of the SUN2000 is normal.
What to do if Huawei 01075345 shows AFCI Check Failure?
If your Huawei Inverter displays an AFCI Check Failure, turn off the AC output switch and DC input switch, and then turn them on after 5 minutes.
What to do if Huawei 01075345 Inverter displays Unstable Grid Frequency?
If your Huawei Inverter displays an Unstable Grid Frequency alarm: * If the alarm occurs occasionally, the power grid may be abnormal temporarily. The SUN2000 will automatically recover after detecting that the power grid becomes normal. * If the alarm occurs frequently, check whether the power grid frequency is within the allowed range. If no, contact the local power operator.
What to do if Huawei 01075345 shows Grid Failure?
If your Huawei Inverter indicates a Grid Failure, it means the power grid is experiencing an outage, the AC circuit is disconnected, or the AC circuit breaker is OFF. First, check the AC voltage. Second, check whether the AC circuit is disconnected or the AC circuit breaker is OFF.
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