Huawei SUN2000-8KTL-M0 - Troubleshooting

SUN2000-(12KTL, 15KTL, 17KTL, 20KTL)-M0
User Manual
7 Maintenance
Issue 03 (2019-07-19)
Copyright © Huawei Technologies Co., Ltd.
63
7.2 Troubleshooting
Alarm severities are defined as follows:

Major: The inverter is faulty. As a result, the output power decreases or the grid-tied
power generation is stopped.

Minor: Some components are faulty without affecting the grid-tied power generation.

Warning: The inverter works properly. The output power decreases or some authorization
functions fail due to external factors.
Table 7-2 Common alarms and troubleshooting measures
Alarm ID
Alarm
Name
Alarm
Severity
Possible Cause
Troubleshooting Suggestion
2001
High
String
Input
Voltage
Major
Excessive PV modules are
connected in series in the PV
array. Therefore, the
open-circuit voltage exceeds
the maximum input voltage of
the SUN2000.
Cause ID 1 = PV1 and PV2
Cause ID 2 = PV3 and PV4
Check the number of PV modules
connected in series in the PV string,
and ensure that the PV string
open-circuit voltage is no greater
than the maximum operating voltage
of the SUN2000. After you correctly
configure the PV array, the inverter
alarm disappears automatically.
2002
DC Arc
Fault
Major
The PV string power cable arcs
or is in poor contact.
Cause ID 1 = PV1 and PV2
Cause ID 2 = PV3 and PV4
Check whether the string cables arc
or are in poor contact.
2011
String
Reversed
Major
The PV string is reversely
connected.
Cause ID 1 = PV1
Cause ID 2 = PV2
Cause ID 3 = PV3
Cause ID 4 = PV4
Check whether the PV string is
reversely connected to the SUN2000.
If so, wait until the solar irradiance
declines at night and the PV string
current drops to below 0.5 A. Then,
set the DC SWITCH to the OFF
position, and correct the string
polarity.
2012
String
Current
Backfeed
Warning
Only a few PV modules are
connected in series in the PV
string. Therefore, the end
voltage is lower than that of
other PV strings.
Cause ID 1 = PV1
Cause ID 2 = PV2
Cause ID 3 = PV3
Cause ID 4 = PV4
1. Check whether the number of PV
modules connected in series to
this PV string is less than the
number of PV modules connected
in series to the other PV strings
connected in parallel with this PV
string. If yes, wait until the PV
string current drops below 0.5 A,
set DC SWITCH to OFF, and
adjust the number of PV modules
in the PV string.
2. Check whether the PV string is
shaded.
3. Check whether the open-circuit
voltage of the PV string is
normal.