SUN2000-(55KTL, 60KTL) Series
User Manual
8 System Maintenance
Issue 02 (2017-07-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
99
Alarm ID Alarm
Name
Alarm
Severity
Possible Cause
Suggestion
connect to the inverter.
The SUN2000 output side
does not connect to an
isolation transformer when
the PV string output is
grounded.
2.
If the PV string output is
grounded, check that the
SUN2000 output side connects to
an isolation transformer.
400
System
Fault
Major
Cause ID = 1/3/21/23/27
An unrecoverable fault occurs
on a circuit inside the inverter.
Turn off the AC output switch and
DC input switch. Then turn on the
AC output switch and DC input
switch after 5 minutes. If the fault
persists, contact Huawei technical
support.
410
Abnormal
Auxiliary
Power
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.
1.
When the alarm is generated, the
inverter shuts down
automatically. When the fault is
rectified, the inverter starts
automatically.
2.
If the alarm persists, contact
Huawei technical support.
413
Abnormal
PV String
Connectio
n
Major
Cause ID = 1
The PV string does not
properly connect to the MPPT1
circuit.
Cause ID = 2
The PV string does not
properly connect to the MPPT2
circuit.
Cause ID = 3
The PV string does not
properly connect to the MPPT3
circuit.
Cause ID = 4
The PV string does not
properly connect to the MPPT4
circuit.
Check the PV string for reverse
connection and cross connection.
504
Software
Version
Unmatch
Minor
Cause ID = 1/2/3
During inverter software
upgrade, the version of the
software loaded is incorrect.
Check whether you have performed
a software upgrade recently. If yes,
upgrade the software to the correct
version again.
505
Upgrade
Failed
Major
Cause ID = 1
The upgrade does not end
Perform the upgrade again.