8.2 System Power-O
Precautions
● After the system is powered o, the inverter is still energized and hot, which
may cause electric shocks or burns. Therefore, wait for at least 5 minutes and
wear insulated gloves before working on the inverter.
● Before maintaining the optimizer and PV strings, power o the system by
following the procedure. Otherwise, electric shocks may occur because the PV
strings are energized.
Procedure
Step 1 Send a shutdown command on the app.
Step 2 Set the DC SWITCH to OFF.
Step 3 (Optional) Install the locking screw for the DC SWITCH.
Step 4 Turn o the AC switch between the inverter and the power grid.
Step 5 Turn o the DC switch between the inverter and PV strings.
Step 6 (Optional) Turn o the battery switch between the inverter and the battery.
----End
8.3 Troubleshooting
Alarm severities are dened as follows:
● Major: The inverter shuts down or some functions are abnormal due to a
fault.
● Minor: Some components of the inverter are faulty but the system can still
connect to the grid and generate power.
● Warning: The inverter functions normally, but its output power decreases due
to external factors.
SUN2000-(8K, 10K)-LC0 Series
User Manual 8 System Maintenance
Issue 01 (2023-09-15) Copyright © Huawei Digital Power Technologies Co., Ltd. 91
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