Display
Category
Indicator Status Meaning
O - The inverter disconnects from all PV strings, or the
DC input voltage of all MPPT circuits is less than
500 V.
Grid-tied
indication
LED2 LED4 NA
Steady
green
- The inverter is in grid-tied mode.
Blinking
green at
short
intervals
Red An environmental fault occurs at AC side.
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.
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.
SUN2000-(175KTL-H0, 185KTL-INH0, 185KTL-H1
User Manual
2 Overview
Issue 05 (2020-08-30) Copyright © Huawei Technologies Co., Ltd. 11
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