Huawei SUN2000 8-28KTL Solar Inverter

A major fault caused by excessive PV string output voltage, where the open-circuit voltage of the PV string exceeds the maximum operating voltage of the SUN2000. This can damage the inverter's DC input stage and prevents power generation.

A warning indicating that PV string 1 is performing abnormally, possibly due to long-term shielding or deterioration. This results in reduced power output from the specific string, decreasing overall system efficiency.

A warning indicating that PV string 2 is performing abnormally, possibly due to long-term shielding or deterioration. This results in reduced power output from the specific string, decreasing overall system efficiency.

A warning indicating that PV string 3 is performing abnormally, possibly due to long-term shielding or deterioration. This results in reduced power output from the specific string, decreasing overall system efficiency.

A warning indicating that PV string 4 is performing abnormally, possibly due to long-term shielding or deterioration. This results in reduced power output from the specific string, decreasing overall system efficiency.

A warning indicating that PV string 5 is performing abnormally, possibly due to long-term shielding or deterioration. This results in reduced power output from the specific string, decreasing overall system efficiency.

A warning indicating that PV string 6 is performing abnormally, possibly due to long-term shielding or deterioration. This results in reduced power output from the specific string, decreasing overall system efficiency.

A warning indicating that the cables for PV string 1 were connected in reverse during the SUN2000 installation. This incorrect polarity can prevent power generation from this string or cause damage to the inverter if not corrected.

A warning indicating that the cables for PV string 2 were connected in reverse during the SUN2000 installation. This incorrect polarity can prevent power generation from this string or cause damage to the inverter if not corrected.

A warning indicating that the cables for PV string 3 were connected in reverse during the SUN2000 installation. This incorrect polarity can prevent power generation from this string or cause damage to the inverter if not corrected.

A warning indicating that the cables for PV string 4 were connected in reverse during the SUN2000 installation. This incorrect polarity can prevent power generation from this string or cause damage to the inverter if not corrected.

A warning indicating that the cables for PV string 5 were connected in reverse during the SUN2000 installation. This incorrect polarity can prevent power generation from this string or cause damage to the inverter if not corrected.

A warning indicating that the cables for PV string 6 were connected in reverse during the SUN2000 installation. This incorrect polarity can prevent power generation from this string or cause damage to the inverter if not corrected.

A major fault where abnormal external conditions have triggered DC circuit protection inside the SUN2000, causing issues with the internal DC bus voltage. This can be due to sudden input disconnection, sharp changes in grid voltage, or grid phase imbalances, leading to inverter shutdown.

A major fault where abnormal external conditions have triggered protection in the SUN2000's converter circuit. This can be due to grid voltage drops, short circuits causing high output current, or abnormal grid frequency, leading to inverter shutdown.

A major fault indicating that the connected grid voltage is outside the allowed range, or there is a large difference in voltage among the three phases, or a power outage/AC line disconnection. This prevents grid synchronization and power export, leading to inverter shutdown.

A major fault indicating that the actual frequency of the connected power grid is outside the required range for the local grid. This can prevent the SUN2000 from synchronizing and feeding power, leading to shutdown.

A major fault where the insulation resistance of the PV strings against ground is low, potentially due to a short circuit between strings and ground or installation in a permanently moist environment. This poses a safety risk and can lead to inverter shutdown.

A major fault indicating that the insulation resistance against ground on the input side of the SUN2000 has decreased during operation, leading to an excessively high residual current. This implies a potential ground fault or insulation breakdown, causing inverter shutdown.

A major fault indicating that the internal temperature of the SUN2000 cabinet is too high, potentially due to poor ventilation, high ambient temperature, or a malfunctioning internal fan. This can lead to reduced performance, shutdown, or damage to internal components.

A major fault indicating that the neutral wire or PGND cable is not connected to the SUN2000, or an isolation transformer is missing at the output side when PV strings are grounded. This prevents proper electrical grounding of the inverter, posing a safety risk and operational instability.

A major, unrecoverable fault has occurred on an internal circuit within the SUN2000. This indicates a serious internal hardware or software issue that prevents normal operation.

A minor fault where the internal communication circuit of the SUN2000 is interrupted or damaged, or its internal communication address is incorrectly set. This affects data exchange within the inverter, but the SUN2000 may still feed electricity.

A minor fault indicating that the software version loaded during a software upgrade is incorrect. This can lead to improper inverter operation or functionality issues, but the SUN2000 may still feed electricity.

A major fault indicating that a firmware upgrade process was incomplete, which can leave the SUN2000 in an inoperable state. The inverter cannot function correctly without a complete and valid firmware.

A minor fault indicating an issue with the flash drive, either due to insufficient space, bad blocks, or general faultiness. This affects the storage and retrieval of data on the monitoring board, but the SUN2000 may still feed electricity.