Display
Category
Indicator Status Meaning
O - The inverter is not in grid-tied mode.
Communicatio
ns indication
LED3 -
Blinking green at short
intervals
The inverter receives data over RS485 or MBUS
communication.
O The inverter has not received data over RS485 or
MBUS communication for 10 seconds.
Alarm/O&M
indication
LED4 -
Steady red A major alarm is generated.
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 at short
intervals
A minor alarm is generated.
Blinking red at long
intervals
A warning alarm is generated.
Steady green Local maintenance succeeds.
Blinking green at long
intervals
In local maintenance or shuts down over a
command.
Blinking green at short
intervals
Local maintenance fails.
O No alarm is generated, and no local maintenance
operations are performed.
● Local maintenance refers to operations performed after a universal serial bus (USB)
ash drive, Bluetooth module, WLAN module, or USB data cable is inserted into the USB
port of the inverter. For example, local maintenance includes conguration import and
export using a USB ash drive, and connecting to the SUN2000 app over a Bluetooth
module, WLAN module, or 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, Bluetooth
module, WLAN module, or USB data cable is removed, the indicator shows the alarm
state.
SUN2000-(175KTL-H0, 185KTL-INH0, 185KTL-H1)
User Manual 2 Overview
Issue 19 (2023-12-20) Copyright © Huawei Technologies Co., Ltd. 17
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