Huawei SUN2000-30KTL-US User Manual page 114

SUN2000-(25KTL, 30KTL)-US
User Manual
Alarm ID Alarm
Name
321 Cabinet
Over-Tem
p
326 Electrical
Grounding
Fault
400 System
Fault
410 Abnormal
Auxiliary
Power
411 AFCI
Self-Chec
k Failure
Issue 09 (2019-06-30)
Alarm Causes
Severity
current.
Major Cause ID = 1
 The SUN2000 is installed in
a place with poor
ventilation.

The ambient temperature is
too high.
 The internal fan is not
working.
Major Cause ID = 1
 The neutral wire or PGND
cable is not connected to the
SUN2000.
 The isolation transformer is
not connected to the
SUN2000 at the output side
if the PV strings are
grounded.
Major Cause ID = 1/3/21/23/27
An unrecoverable fault has
occurred on a circuit inside the
SUN2000.
Major Cause ID = 4
The sampling control board has
an abnormal voltage, which
may be caused by the
following:

The internal power chip of
the sampling control board
is faulty.
 The detection circuit
becomes faulty.
Major Cause ID = 1/2/3
The AFCI self-check fails.
Copyright © Huawei Technologies Co., Ltd.
Measures
lasts a long time, check whether
the insulation resistance against
the ground of PC strings is too
low.

Check the ventilation and
ambient temperature of the
SUN2000 installation position.
 If the ventilation is poor or the
ambient temperature exceeds the
upper threshold, improve the
ventilation and heat dissipation.

If the ventilation and ambient
temperature both meet
requirements, contact Huawei
technical support.
1. Check that the neutral wire and
PGND cable are properly
connected.
2. Check that an isolation
transformer is connected to the
SUN2000 at the output side if the
PV strings are grounded.
Turn off the AC output switch and
DC input switch, and then turn them
on after 5 minutes. If the fault
persists, contact Huawei technical
support.
1. When the alarm is generated, the
SUN2000 shuts down
automatically. When the fault is
rectified, the SUN2000 starts
automatically.
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 fault persists, contact Huawei
technical support.
2. Disable AFCI on the SUN2000
app, SmartLogger, or NMS if you
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