Indicator Description
Indicator Status (Blinking Fast: On
for 0.2s and O for 0.2s;
Blinking Slowly: On for 1s
and O for 1s)
Meaning
PV connection
indicator
Steady green At least one PV string is properly connected,
and the DC input voltage of the
corresponding MPPT circuit is higher than
or equal to 500 V.
Blinking green fast If the alarm/maintenance indicator is red,
an environmental fault at the DC side of
the SUN2000 was generated.
O The SUN2000 disconnects from all PV
strings, or the DC input voltages of all
MPPT circuits are less than 500 V.
Grid connection
indicator
Steady green The SUN2000 is in grid-tied mode.
Blinking green fast If the alarm/maintenance indicator is red,
an environmental fault at the AC side of the
SUN2000 was generated.
O The SUN2000 is not in grid-tied mode.
Communication
indicator
Blinking green fast The SUN2000 receives communication data
normally.
O The SUN2000 has not received
communication data for 10 seconds.
Alarm/Maintenance
indicator
Alarm state Steady red A major alarm was generated.
● If the PV connection indicator or grid
connection indicator is blinking green
fast, troubleshoot DC or AC
environmental faults as instructed by the
app.
● If the PV connection indicator and grid
connection indicator are both not
blinking green fast, replace components
or the device as instructed by the app.
(Upon the
rst power-on, after you turn
on the AUX. SWITCH, the PV connection
indicator is steady green and the alarm
indicator is steady red. This is normal
and no alarm needs to be handled.)
Blinking red
fast
A minor alarm was generated.
SUN2000-(250KTL, 280KTL, 300KTL, 330KTL) Series
User Manual 2 Overview
Issue 07 (2023-06-30) Copyright © Huawei Technologies Co., Ltd. 19
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