What does 'Abnormal Grounding' mean on my Huawei Inverter and how do I fix it?
An 'Abnormal Grounding' error on your Huawei Inverter can occur if the PE cable isn't connected properly or if the SUN2000 output isn't connected to an isolation transformer when the PV string output is grounded. Ensure the PE cable is correctly connected. If the PV string output is grounded, confirm that the SUN2000 output connects to an isolation transformer.
What to do if my Huawei Inverter shows Grid Loss?
If your Huawei Inverter indicates a Grid Loss, it could be due to a power outage or a disconnection in the AC circuit. The alarm should disappear automatically once the power grid recovers. Ensure the AC power cable is properly connected and the AC switch is turned ON.
What to do if my Huawei SUN2000-50KTL-M0 shows Grid Underfrequency?
If your Huawei Inverter displays a Grid Underfrequency alarm, the grid frequency is lower than the local power grid standard. If this happens briefly, it may be a temporary grid issue, and the SUN2000 should recover automatically. If it occurs frequently, check if the grid frequency is within the normal range and contact the local power operator if it is not. If the frequency is normal, you may need to modify the grid underfrequency protection threshold with their consent.
What to do if my Huawei Inverter shows Grid Overfrequency?
If your Huawei Inverter displays a Grid Overfrequency alarm, it indicates that the grid frequency is higher than the local power grid standard. If the alarm occurs accidentally, it could be a temporary grid issue, and the SUN2000 should recover automatically. If it occurs frequently, check if the grid frequency is within the acceptable range and contact the local power operator if it's not. If the frequency is normal, consider modifying the grid overfrequency protection threshold with their consent.
What to do if my Huawei SUN2000-50KTL-M0 shows Abnormal Residual Current?
If your Huawei Inverter displays an Abnormal Residual Current warning, the insulation impedance of the input side to PE is decreasing during operation. If this occurs briefly, it might be a temporary issue with the external power cable, and the SUN2000 should recover automatically. However, if it happens often or persists, verify that the impedance between the PV string and ground is above the lower threshold.
What causes Huawei SUN2000-50KTL-M0 to display a 'Phase Wire Short-Circuited to PE' error?
A 'Phase Wire Short-Circuited to PE' error on your Huawei Inverter indicates a low impedance between the output phase wire and PE, or a short circuit. Inspect the impedance of the output phase wire to PE, locate the low impedance point, and fix the fault.
What to do if my Huawei SUN2000-50KTL-M0 shows Abnormal String Power?
If your Huawei Inverter reports Abnormal String Power, it could be due to shading or deterioration of the PV string. Check if the current of the affected PV string is lower than others, and ensure it's not shaded and the number of PV strings matches the configuration. If the string is clean and unshaded, inspect it for damage.
Why is my Huawei SUN2000-50KTL-M0 showing String Reverse Connection?
If your Huawei Inverter displays a String Reverse Connection error, the PV string is connected in reverse. Check the connection of the PV string to the SUN2000. If it is, wait until night when solar irradiance decreases and the PV string current drops below 0.5 A. Then, turn off the two DC switches and correct the PV string connection.
What to do if my Huawei SUN2000-50KTL-M0 displays a 'Low Insulation Resistance' error?
A 'Low Insulation Resistance' error on your Huawei Inverter indicates that the PV string might be short-circuited to PE or that the power cable insulation to ground is compromised due to moisture. Check the impedance between the PV string and the PE cable, and rectify any short circuits. Ensure the PE cable is correctly connected. If the low impedance is due to cloudy or rainy conditions, try resetting the insulation resistance protection.
What to do if my Huawei Inverter shows Grid Undervoltage?
If your Huawei Inverter is showing a Grid Undervoltage error, the grid voltage is below the lower threshold. If this happens briefly, it may be a temporary grid issue, and the SUN2000 should recover automatically. If it occurs frequently, check if the power grid voltage is within the normal range, and contact the local power operator if it's not. If the voltage is normal, you may need to adjust the undervoltage protection threshold with their consent. Also, check the AC circuit breaker and AC output power cable if the problem persists.
Details critical safety measures to prevent injury during operation, including PPE and tool usage.
Covers essential electrical safety measures, grounding, and cable handling to prevent shocks.
Specifies safe operating environments, including avoiding flammable/explosive conditions and liquids.
Outlines safety protocols for handling the equipment, including moving heavy objects and using ladders.
Explains the conceptual diagram and working modes (Standby, Operating, Shutdown) of the SUN2000.
Details environment and space requirements for selecting an appropriate installation location.
Guides on how to safely take out and mount the SUN2000 onto the bracket.
Step-by-step guide for connecting the AC output power cable, including cable specifications.
Procedure for connecting DC input power cables, including terminal descriptions and cable specs.
Procedure for turning on the AC and DC switches and connecting to the SUN2000 app.
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