When the Huawei SUN2000 inverter is alarmed and cannot be connected to the network, the alarm ID is 313-1 (low insulation resistance). Which of the following measures can be taken to troubleshoot or try to solve? (Multiple Choice)

When the Huawei SUN2000 inverter is alarmed and cannot be connected to the network, the alarm ID is 313-1 (low insulation resistance). Which of the following measures can be taken to troubleshoot or try to solve? (Multiple Choice)
A . Reduce the insulation resistance protection threshold in the setting
B . Connect to the DC string one by one and try to start troubleshooting the fault string.
C . Use one test tool such as a shaker to detect the insulation resistance of each string one by one.
D . Check the AC insulation resistance value

View Answer

Answer: ABC