Huawei SUN2000-15KTL-50KTL-M3 Series User Manual page 32

Replacing SUN2000-(15KTL-50KTL) Series with
SUN2000-(15KTL-50KTL)-M3 Series
User Manual
ID Name
System
400
fault
410 Abnormal
auxiliary
power
AFCI
411
self-check
failure
412 DC arc
fault
504 Software
version
unmatch
Upgrade
505
failed
506 License
expired
Issue 01 (2021-04-05)
Severity Cause
cable of the inverter is not
connected.
 The output side of the
inverter does not connect to
an isolation transformer
when the PV strings are
grounded.
Major Cause ID = 1/3/21/23/27
An unrecoverable fault occurs
on a circuit inside the inverter.
Major Cause ID = 4
The sampling control board has
an abnormal voltage. The
possible causes are as follows:
 The internal power chip of
the sampling control board
is faulty.

The detection circuit is
faulty.
Major Cause ID = 1/2/3
The AFCI self-check fails.
Major Cause ID = 1/2/3/4
The PV string cable is in poor
contact or with open circuits.
Minor Cause ID = 1/2/3
During inverter software
upgrade, the version of the
software loaded is incorrect.
Major Cause ID = 1
The upgrade is not completed
normally.
Warning Cause ID = 1
 The license has entered its
grace period.
 The license is about to
expire.
Copyright © Huawei Technologies Co., Ltd.
Solution
2. If the PV string output is
grounded, check whether the
output side of the inverter
connects to an isolation
transformer.
Turn off the AC output switch and
DC input switch, and then turn them
on after 5 minutes. If the alarm
persists, contact Huawei technical
support.
1. When the alarm is generated, the
inverter shuts down
automatically. After the fault is
rectified, the inverter
automatically starts.
2. If the alarm persists, contact
Huawei technical support.
1. Turn off the AC output switch
and DC input switch, and then
turn them on after 5 minutes. If
the alarm persists, contact
Huawei technical support.
2. If you have confirmed that the
AFCI function is not required,
disable it.
Check whether the PV string cable is
in poor contact or with open circuits.
If yes, reconnect the cable.
Check whether you have performed a
software upgrade recently. If yes,
upgrade the software to the correct
version again.
Perform the upgrade again.
1. Apply for a new license.
2. Load a new license.
9 Maintenance
95