Powering On The System - Huawei SUN2000 Series User Manual

SUN2000-(12KTL-25KTL)-M5 Series
User Manual

6.2 Powering On the System

Precautions
If the DC power supply is connected but the AC power supply is disconnected, the
inverter will report a Grid Failure alarm. The inverter can start properly only after
the power grid recovers.
Procedure
Step 1 At the AC switch between the inverter and the power grid, use a multimeter to
measure the grid voltage and ensure that the voltage is within the allowed
operating voltage range of the inverter. If the voltage is not in the allowed range,
check the circuits.
Step 2 Turn on the AC switch between the inverter and the power grid.
Step 3 Turn on the DC switch (if any) between the PV strings and the inverter.
Step 4 (Optional) Remove the locking screw next to the DC SWITCH on the inverter.
Step 5 Set the DC SWITCH to ON.
Step 6 Observe the LED indicators to check the status of the inverter.
Table 6-2 Indicator description
Category
Running
indication
Issue 01 (2022-06-15)
NO TICE
Status
LED1
Steady
green
Blinking
green
slowly (on
for 1s and
off for 1s)
Blinking
green
slowly (on
for 1s and
off for 1s)
Off
Copyright © Huawei Digital Power Technologies Co., Ltd.
LED2
Steady green
Off
Blinking green slowly
(on for 1s and off for
1s)
Blinking green slowly
(on for 1s and off for
1s)
6 Commissioning
Description
-
The inverter is operating
in grid-tied mode.
The DC is on and the AC
is off.
Both the DC and AC are
on, but the inverter is yet
to connect to the power
grid.
The DC is off and the AC
is on.
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