Huawei SUN2000-75KTL Series User Manual page 120

SUN2000-(75KTL, 100KTL, 110KTL, 125KTL) Series
User Manual
Table 8-2 Common alarms and troubleshooting measures
Alarm Alarm
ID Name
2001 High
String
Input
Voltage
2003 DC arc
fault
2011 String
Reverse
Connecti
on
Issue 11 (2021-11-10)
Alarm Possible Causes
Severit
y
Major ● Cause ID = 1: PV1 and PV2
● Cause ID = 2: PV3 and PV4
● Cause ID = 3: PV5 and PV6
● Cause ID = 4: PV7 and PV8
● Cause ID = 5: PV9 and PV10
● Cause ID = 6: PV11 and PV12
● Cause ID = 7: PV13 and PV14
● Cause ID = 8: PV15 and PV16
● Cause ID = 9: PV17 and PV18
● Cause ID = 10: PV19 and PV20
The PV array is not properly
configured. Excessive PV modules
are connected in series to a PV
string, and therefore the PV string
open-circuit voltage exceeds the
maximum operating voltage of
the solar inverter.
Major Cause ID = 1–20: PV1–PV20
The PV string power cables arc or
are in poor contact.
Major Cause ID = 1–20: PV1–PV20
The PV string is reversely
connected.
Copyright © Huawei Technologies Co., Ltd.
8 Maintenance
Suggestions
Reduce the number of PV
modules connected in series
in the PV string until the PV
string open-circuit voltage is
not greater than the
maximum operating voltage
of the solar inverter. After the
PV array configuration is
corrected, the alarm
disappears.
Check whether the PV string
cables arc or are in poor
contact.
Check whether the PV string
is reversely connected to the
solar inverter. If yes, wait until
the solar irradiance declines
at night and the PV string
current drops below 0.5 A.
Then, turn off the DC switches
and correct the PV string
connection.
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