8.2 Power-O for Troubleshooting
Context
To prevent personal injury and equipment damage, perform the following
procedure to power
o the solar inverter for troubleshooting or replacement.
● 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
nish Step 3 to
Step 5.
● 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
rectied.
● Before power-o 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
o 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
o all DC input switches of the solar inverter.
For the SUN2000-90KTL-H2 used in Australia, install the delivered screw for locking each
DC switch.
Step 7 Wait for 15 minutes and troubleshoot or repair the inverter.
SUN2000-(90KTL, 95KTL, 100KTL, 105KTL) Series
User Manual
8 Maintenance
Issue 11 (2020-08-30) Copyright © Huawei Technologies Co., Ltd. 97
To Next Page
Loading...
Need help?
General