Table 8-2 Common alarms and troubleshooting measures
Alarm
ID
Alarm Name Alarm
Severity
Possible Cause Troubleshooting Suggestion
2001 High String
Input Voltage
Major The PV array is not
properly
congured.
Excessive PV
modules are
connected in series
to the PV string,
and therefore the
open-circuit voltage
exceeds the
maximum inverter
operating voltage.
Cause ID 1 = PV1
and PV2
Cause ID 2 = PV3
and PV4
Reduce the number of PV modules
connected in series to the PV string
until the PV string open-circuit
voltage is less than or equal to the
maximum inverter operating
voltage. After the PV array is
correctly
congured, the inverter
alarm disappears.
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 that the PV string power
cable does not arc and is in good
contact.
2011 String Reverse
Connection
Major The PV string
polarity is reversed.
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 yes, wait until the PV
string current decreases below 0.5
A, set DC SWITCH to OFF, and
adjust the PV string polarity.
SUN2000-(8KTL-20KTL)-M2
User Manual 8 Maintenance
Issue 11 (2023-02-07) Copyright © Huawei Technologies Co., Ltd. 95
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