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 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
2.5.1 Circuit Diagram
The solar inverter receives inputs from 20 PV strings. The inputs are grouped into
10 MPPT circuits inside the solar inverter to track the maximum power point of
the PV strings. The DC power is then converted into three-phase AC power
through an inverter circuit. Surge protection is supported on both the DC and AC
sides.
SUN2000-(75KTL, 100KTL, 110KTL, 125KTL) Series
User Manual 2 Overview
Issue 11 (2021-11-10) Copyright © Huawei Technologies Co., Ltd. 18
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