6.2 System Power-On
Prerequisites
Before turning on the AC switch between the SUN2000 and the power grid, use a
multimeter to check that the AC voltage is within the allowed range.
● If the DC power supply is connected but the AC power supply is disconnected,
the SUN2000 will report a Grid Loss alarm. The SUN2000 can start properly
only after the power grid recovers.
● If the AC power supply is connected but the battery is not connected, the
SUN2000 reports a Battery Abnormal alarm.
● If the SUN2000 is connected to batteries, turn on the DC switch within 1
minute after the AC switch is turned on. Otherwise, the SUN2000, connected to
the power grid, will shut down and start again.
Procedure
Step 1 If the battery port of the SUN2000 is connected to a battery, turn on the auxiliary
power switch of the battery and then the battery switch.
Step 2 Turn on the AC switch between the SUN2000 and the power grid.
Step 3 (Optional) Remove the locking screw from the DC switch.
Figure 6-1 Removing the locking screw from a DC switch
Step 4 Turn on the DC switch between the PV string and the SUN2000 if there is any.
Step 5 Turn on the DC switch at the bottom of the SUN2000.
Step 6 Observe the LEDs to check the SUN2000 operating status.
Table 6-2 LED indicators 1
Category Status Description
Running indicator LED1 LED2 –
SUN2000-(2KTL-6KTL)-L1
User Manual 6 System Commissioning
Issue 04 (2021-04-01) Copyright © Huawei Technologies Co., Ltd. 59
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