Power-Off For Troubleshooting - Huawei SUN2000-90KTL Series User Manual

SUN2000-(90KTL, 95KTL, 100KTL, 105KTL) Series
User Manual

8.2 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.
● When a solar inverter is faulty, try to avoid standing in front of the solar
● Do not operate the DC switch on the solar inverter before you finish
● If the AC switch between the solar inverter and the power grid has
● Before power-off for troubleshooting, do not touch the energized components
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.
●
●
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.
Issue 11 (2020-08-30)
CA UTION
inverter.
Step 5.
automatically disconnected, do not turn on the switch before the fault is
rectified.
of the solar inverter. Otherwise, electric shocks or arcing may occur.
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.
NO TE
For the SUN2000-90KTL-H2 used in Australia, install the delivered screw for locking each
DC switch.
Copyright © Huawei Technologies Co., Ltd.
8 Maintenance
Step 3 to
97