Step 2 Turn off the AC switch between the SUN2000 and the power grid.
Step 3 Turn off both DC switches.
----End
6.4 Power-Off for Troubleshooting
Context
To prevent personal injury and equipment damage, perform the following
procedure to power off the solar inverter for troubleshooting or replacement.
CA UTION
● When a solar inverter is faulty, try to avoid standing in front of the solar
inverter.
● Do not operate the DC switch on the solar inverter before you finish
to
● If the AC switch between the solar inverter and the power grid has
automatically disconnected, do not turn on the switch before the fault is
rectified.
● Before power-off for troubleshooting, do not touch the energized components
of the solar inverter. Otherwise, electric shocks or arcing may occur.
Procedure
Step 1 Wear proper personal protective equipment (PPE).
Step 2 If the solar inverter is not shut down due to a fault, send a shutdown command
on the app, SmartLogger, or management system. If the solar inverter has shut
down due to a fault, go to the next step.
Step 3 Turn off the AC switch between the solar inverter and the power grid.
Step 4 Measure the DC current of each PV input string using a clamp meter that is set to
the DC position.
●
If the current is less than or equal to 0.5 A, go to the next step.
●
If the current is higher than 0.5 A, wait until the solar irradiance decreases
and the PV string current decreases below 0.5 A at night, and then go to the
next step.
Step 5 Open the maintenance compartment door, install a support bar, and use a
multimeter to measure the voltage between the AC terminal block and the
ground. Ensure that the AC side of the solar inverter is disconnected.
Step 6 Turn off all DC input switches of the solar inverter.
Step 7 Wait for 15 minutes and troubleshoot or repair the inverter.
SUN2000-(50KTL, 60KTL, 65KTL)-M0
User Manual
6 Commissioning
Issue 06 (2020-07-07)
Copyright © Huawei Technologies Co., Ltd.
70