Huawei SUN2000 Series Solar Inverter

This alarm signifies that the insulation resistance of the PV strings or associated DC power cables connected to the SUN2000 inverter is below an acceptable threshold, indicating a potential ground fault or short circuit. If the irradiance or PV string voltage is too high, the fault location feature may fail, displaying 'Conditions not met'. This condition poses a risk of electrical shock and equipment damage.

The DC SWITCH has automatically turned off, signaling an event where current is flowing back into the PV strings from the inverter or another source. This condition can indicate an internal fault within the inverter or an external wiring issue that could damage the PV array or the SUN2000 inverter.

This alarm indicates that the DC SWITCH has automatically turned off due to a detected reverse polarity connection of the PV strings. Incorrect string connections can lead to improper power generation, reduced efficiency, and potential damage to the SUN2000 inverter or PV modules.

This alarm indicates that the DC SWITCH has automatically turned off because the voltage of one or more PV strings has exceeded the maximum allowable input voltage for the SUN2000 inverter. Sustained overvoltage can lead to critical component failure, permanent damage to the inverter, and safety hazards.