Table 8-2 Common alarms and troubleshooting measures
Alarm
ID
Alarm
Name
Alarm
Severit
y
Possible Causes
Suggestions
2001
High
String
Input
Voltage
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.
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.
2003
DC arc
fault
Major
Cause ID = 1–20: PV1–PV20
The PV string power cables arc or
are in poor contact.
Check whether the PV string
cables arc or are in poor
contact.
2011
String
Reverse
Connecti
on
Major
Cause ID = 1–20: PV1–PV20
The PV string is reversely
connected.
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.
SUN2000-(75KTL, 100KTL, 110KTL, 125KTL) Series
User Manual
8 Maintenance
Issue 11 (2021-11-10)
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