H AFCI
Function
If PV modules or cables are not properly connected or damaged, electric arcs may
occur, which may cause re. Huawei inverters 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 inverter 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 inverter has the AFCI alarm automatic clearance mechanism. If an alarm is
triggered for less than ve times within 24 hours, the inverter automatically clears
the alarm. If the alarm is triggered for ve times or more within 24 hours, the
inverter locks for protection. You need to manually clear the alarm on the inverter
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 inverter 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 H AFCI
Issue 18 (2024-03-10) Copyright © Huawei Technologies Co., Ltd. 119
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