G AFCI
Function
If PV modules or cables are not properly connected or damaged, electric arcs may
occur, which may cause
re. Huawei SUN2000s provide unique arc detection in
compliance with UL 1699B-2018 to ensure the safety of users' lives and property.
This function is enabled by default. The SUN2000 automatically detects arc faults.
To disable this function, log in to the FusionSolar App, enter the Device
Commissioning screen, choose Settings > Feature parameters, and disable AFCI.
The AFCI function works only with Huawei optimizers or ordinary PV modules, but does not
support third-party optimizers or intelligent PV modules.
Clearing Alarms
The AFCI function involves the DC arc fault alarm.
The SUN2000 has the AFCI alarm automatic clearance mechanism. If an alarm is
triggered for less than
ve times within 24 hours, the SUN2000 automatically
clears the alarm. If the alarm is triggered for ve times or more within 24 hours,
the SUN2000 locks for protection. You need to manually clear the alarm on the
SUN2000 so that it can work properly.
You can manually clear the alarm as follows:
● Method 1: FusionSolar App
Log in to the FusionSolar App and choose Me > Device commissioning. On
the Device commissioning screen, connect and log in to the SUN2000 that
generates the AFCI alarm, tap Alarm management, and tap Clear on the
right of the DC arc fault alarm to clear the alarm.
SUN2000-(20KTL, 29.9KTL, 30KTL, 36KTL, 40KTL)-
M3
User Manual G AFCI
Issue 11 (2023-01-10) Copyright © Huawei Technologies Co., Ltd. 108
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