Huawei SUN2000 Series User Manual page 94

SUN2000-(100KTL, 110KTL, 115KTL)-M2
User Manual
● When a solar inverter is faulty, try to avoid standing in front of the solar
● If the LED1 indicator of the inverter is off, the switches are in the OFF position,
● Do not operate the DC switch on the solar inverter before you finish
● The DC switch can be automatically disconnected when an internal fault is
● 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 SUN2000 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.
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Step 5 Open the maintenance compartment door, install a support bar, and use a
multimeter to measure the phase voltages of the AC terminal block. Ensure that
the AC side of the solar inverter is disconnected.
Step 6 Turn off all DC input switches of the solar inverter.
Issue 02 (2022-06-30)
CA UTION
inverter.
do not operate the DC switches of the inverter. In this case, go to
Step 5.
detected in an inverter. Do not turn on the switch before the fault is cleared.
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.
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8 Maintenance
Step 4.
Step 3 to
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