Huawei SUN2000-30KTL-A User Manual page 90

SUN2000-(30KTL-A, 33KTL, 40KTL)
User Manual
Table 8-2 Common alarms and troubleshooting measures
Alarm Alarm
ID Name
103 High DC
Input
Voltage
106–1 Abnormal
11 String 1–6
Issue 04 (2016-06-20)
Alarm Possible Cause
Severity
Major  Cause ID = 1
The PV array is not
properly configured.
Excessive PV modules
are connected in series to
PV strings 1 and 2, and
therefore the PV string
open-circuit voltage
exceeds the inverter
maximum MPP voltage.
 Cause ID = 2
The PV array is not
properly configured.
Excessive PV modules
are connected in series to
PV strings 3 and 4, and
therefore the PV string
open-circuit voltage
exceeds the inverter
maximum MPP voltage.

Cause ID = 3
The PV array is not
properly configured.
Excessive PV modules
are connected in series to
PV strings 5 and 6, and
therefore the PV string
open-circuit voltage
exceeds the inverter
maximum MPP voltage.
Warning Cause ID = 1
 The PV string is shielded
from sunlight for a long
time.
 The PV string
deteriorates or is
damaged.
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8 System Maintenance
Suggestion
 Cause ID = 1
Reduce the number of PV modules
connected in series to PV strings 1 and
2 until the open-circuit voltage is less
than or equal to the maximum inverter
input voltage. After the PV array
configuration is corrected, the inverter
alarm disappears.
 Cause ID = 2
Reduce the number of PV modules
connected in series to PV strings 3 and
4 until the open-circuit voltage is less
than or equal to the maximum inverter
input voltage. After the PV array
configuration is corrected, the inverter
alarm disappears.
 Cause ID = 3
Reduce the number of PV modules
connected in series to PV strings 5 and
6 until the open-circuit voltage is less
than or equal to the maximum inverter
input voltage. After the PV array
configuration is corrected, the inverter
alarm disappears.
1. Check whether the PV string current is
obviously lower than the currents of
other PV strings.
2. If yes, check whether the PV string is
shielded from sunlight.
3. If the PV string is clean and not
shielded from sunlight, check whether
any PV module is faulty.
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