LED Status Meaning
O The SUN2000 disconnects from
all PV strings, or the DC input
voltage of each MPPT circuit is
less than 200 V.
Grid-tied LED Steady green The SUN2000 is exporting
power to the power grid.
O The SUN2000 is not exporting
power to the power grid.
Communicati
on LED
Blinking green (on for 0.2s and then o for
0.2s)
The SUN2000 receives
communications data normally.
O The SUN2000 receives no
communications data for 10s.
Alarm/
Maintenance
LED
Alarm status Blinking red at long
intervals (on for 1s and
then o for 4s)
The SUN2000 is generating a
warning alarm.
Blinking red at short
intervals (on for 0.5s
and then o for 0.5s)
The SUN2000 is generating a
minor alarm.
Steady red The SUN2000 is generating a
major alarm.
Local maintenance
status
Blinking green at long
intervals (on for 1s and
then o for 1s)
Local maintenance is in
progress.
Blinking green at short
intervals (on for 0.125s
and then o for 0.125s)
Local maintenance fails.
Steady green Local maintenance is
successful.
● Local maintenance refers to operations performed after a USB ash drive, a WLAN
module, a Bluetooth module, or a USB data cable is inserted into the USB port of the
solar inverter. For example, local maintenance includes data import and export using a
USB ash drive, and connecting to the SUN2000 app over a WLAN module, a Bluetooth
module, or a USB data cable.
● If the alarming and the local maintenance happen concurrently, the alarm/maintenance
indicator shows the local maintenance state
rst. After the USB ash drive, WLAN
module, Bluetooth module, or USB data cable is removed, the indicator shows the alarm
state.
SUN2000-(70KTL, 75KTL)-C1
User Manual 2 Overview
Issue 09 (2020-10-12) Copyright © Huawei Technologies Co., Ltd. 10
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