After the cleaning is complete, reinstall the bae plate. Tighten the M4 screws
with a torque of 1.2 N·m.
8.2 Shutdown and Power-O
After the system is powered o, the SUN2000 is still energized and hot, which
may cause electric shocks or burns. Therefore, wait for at least 15 minutes and
wear PPE before working on the SUN2000.
Step 1 Send a shutdown command on the app, SmartLogger, or management system.
For details, see the user manual of the corresponding product.
Step 2 Turn o the AC switch between the SUN2000 and the power grid.
Step 3 Set the two DC SWITCH to OFF.
----End
8.3
Power-O for Maintenance
Precautions
To prevent personal injury and device damage, use the DC current scale of a
clamp meter to measure the PV string current (even if the DC switches have been
turned o) before removing PV connectors when troubleshooting or replacing the
SUN2000 or PV strings. Ensure that the PV strings have no current, and quickly
remove and insert connectors for adjustment.
● If the SUN2000 is faulty, do not stand in front of it if possible.
● If the LED1 indicator on the SUN2000 is o and the DC switches are OFF, do
not operate the DC switches. For details, see Step 4.
● Do not operate the DC switches on the SUN2000 before you perform steps
Step 3 to Step 5.
● When the SUN2000 detects a fault, it triggers automatic DC disconnection
protection. Do not turn on the DC switches before the fault is rectied.
● If the AC switch between the SUN2000 and the power grid has been turned o
automatically, do not turn it on before the fault is rectied.
● Before power-o for maintenance, do not touch the energized components of
the SUN2000. Otherwise, electric shocks or arcs may occur.
SUN2000-(250KTL, 280KTL, 300KTL, 330KTL) Series
User Manual 8 System Maintenance
Issue 07 (2023-06-30) Copyright © Huawei Technologies Co., Ltd. 76
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