Huawei SUN2000-250KTL Series User Manual page 76

SUN2000-(250KTL, 280KTL, 300KTL, 330KTL) Series
User Manual
● If the SUN2000 is faulty, do not stand in front of it if possible.
● If the LED1 indicator on the SUN2000 is off and the DC switches are OFF, do
● Do not operate the DC switches on the SUN2000 before you perform steps
● When the SUN2000 detects a fault, it triggers automatic DC disconnection
● If the AC switch between the SUN2000 and the power grid has been turned off
● Before power-off for maintenance, do not touch the energized components of
Procedure
Step 1 Wear proper PPE.
Step 2 If the SUN2000 does not shut down due to a fault, send a shutdown command on
the app, SmartLogger, or management system. If the SUN2000 has shut down due
to a fault, go to the next step.
Step 3 Turn off the AC switch between the SUN2000 and the power grid.
Step 4 Use a clamp meter to measure the DC current of each PV string input to the
SUN2000.
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Step 5 Open the maintenance compartment door, install a support strut, and use a
multimeter to check the voltage between the AC terminal block and the ground.
Ensure that the AC side of the SUN2000 is powered off.
Step 6 Turn off all DC input switches of the SUN2000 and ensure that all switches are
OFF. If the DC switches are automatically turned off, go to the next step.
Step 7 Wait for 15 minutes and troubleshoot or repair the SUN2000.
● Do not open the panel for maintenance if the SUN2000 is emitting abnormal
● If the SUN2000 does not emit abnormal smell or smoke and is intact, repair or
Issue 02 (2022-12-20)
CA UTION
not operate the DC switches. For details, see
Step 3 to Step 5.
protection. Do not turn on the DC switches before the fault is rectified.
automatically, do not turn it on before the fault is rectified.
the SUN2000. Otherwise, electric shocks or arcs 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.
WARNING
smell or smoke, or has obvious exceptions.
restart it based on the alarm handling suggestions. Do not stand in front of the
SUN2000 during the restart.
Copyright © Huawei Technologies Co., Ltd.
8 System Maintenance
Step 4.
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