Huawei SUN2000-17KTL - Page 118

SUN2000 (8KTL-28KTL)
User Manual
8 Maintenance
Issue 12 (2019-06-30)
Copyright © Huawei Technologies Co., Ltd.
111
Alarms range in severity according to the following definitions:

Major: The inverter enters the shutdown mode and disconnects from the power grid to
stop generating electricity after a fault occurs.

Minor: Some components are faulty but the inverter can still generate electricity.

Warning: The inverter output power decreases due to external factors.
Table 8-2 describes the common fault alarms of the SUN2000 and troubleshooting measures.
Table 8-2 Troubleshooting
Alarm ID
Name
Severity
Causes
Measures
103
DC Over
Voltage
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 maximum
value of the inverter MPPT
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 maximum
value of the inverter MPPT
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 maximum
value of the inverter MPPT
voltage.

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
SUN2000 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
SUN2000 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
SUN2000 alarm disappears.
106 to 111
String 1-6
Abnormal
Warning
Cause ID = 1

PV strings have been
shielded for a long time.

PV strings have
deteriorated.
1. Check whether the output current
of a PV string is obviously less
than the output current of other
PV strings.
2. If so, check whether the PV
string is shielded.
3. If the PV string is clean of