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
The PV array is not
properly configured.
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
configured, 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
Connecti
on
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-(12KTL, 15KTL, 17KTL, 20KTL)-M0
User Manual
7 Maintenance
Issue 06 (2020-07-02)
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