Troubleshooting - Huawei SUN2000-33KTL-US User Manual

SUN2000-(33KTL, 36KTL, 40KTL)-US
User Manual
Item
Grounding
reliability
Sealing

8.2 Troubleshooting

Alarm severities are defined as follows:



Table 8-2 Common alarms and troubleshooting measures
Alarm ID Alarm
Name
103 High DC
Input
Voltage
Issue 07 (2019-06-20)
Check Method
Check whether the ground terminal and
ground cable are securely connected.
Check whether all cable glands are
properly sealed.
Major: The SUN2000 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 SUN2000 can still generate electricity.
Warning: The SUN2000 output power decreases due to external factors.
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 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
Copyright © Huawei Technologies Co., Ltd.
Maintenance Interval
Annual
Annual
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
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.
8 Maintenance
102