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
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.
Blinking red fast A minor alarm is generated.
Blinking red
slowly
A warning alarm is generated.
Local
maintenance
status
Steady green Local maintenance succeeds.
Blinking green
fast
Local maintenance fails.
Blinking green
slowly
In local maintenance or shuts
down over a command.
● The PV connection indicator and the grid connection indicator preferentially indicate
environmental faults.
● 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 an alarm is generated during local maintenance, 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.
2.5 Working Principles
SUN2000-(75KTL, 100KTL, 110KTL, 125KTL) Series
User Manual 2 Overview
Issue 15 (2023-01-31) Copyright © Huawei Technologies Co., Ltd. 24
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