No. Indicator Status (Blinking Fast: On for 0.2s
and then O for 0.2s; Blinking
Slowly: On for 1s and then O for
1s)
Description
Blinking green fast If the alarm/maintenance
indicator is red, an
environmental fault at the DC
side of the solar inverter is
generated.
O The solar inverter disconnects
from all PV strings, or the DC
input voltage of all MPPT
circuits is less than 200 V.
2 Grid connection
indicator
Steady green The solar inverter is in grid-
tied mode.
Blinking green fast If the alarm/maintenance
indicator is red, an
environmental fault at the AC
side of the solar inverter is
generated.
O The solar inverter is not in
grid-tied mode.
3 Communications
indicator
Blinking green fast The solar inverter receives
communication data
normally.
O The solar inverter has not
received communication data
for 10 seconds.
4 Alarm/
Maintenance
indicator
Alarm status Steady red A major alarm is generated.
● If the PV connection
indicator or grid
connection indicator is
blinking green fast,
troubleshoot DC or AC
environmental faults as
instructed by the SUN2000
app.
● If the PV connection
indicator and grid
connection indicator are
both not blinking green
fast, replace components
or the solar inverter as
instructed by the SUN2000
app.
SUN2000-(75KTL, 100KTL, 110KTL, 125KTL) Series
User Manual 2 Overview
Issue 11 (2021-11-10) Copyright © Huawei Technologies Co., Ltd. 17
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