Troubleshooting - Huawei SUN2000 Series User Manual

SUN2000-(90KTL-100KTL) Series
User Manual
Item
Electrical
connections
Grounding
reliability

8.2 Troubleshooting

Alarm severities are defined as follows:



Table 8-2 Common alarms and troubleshooting measures
Alarm Alarm
ID Name
2001 High
string
input
voltage
Check Method
SUN2000 is normal.
 When the SUN2000 is running,
check that all SUN2000 parameters
are correctly set.

Check that cables are securely
connected.

Check that cables are intact, in
particular, the parts touching the
metallic surface are not scratched.

Check that the unused COM, USB,
and RESERVE ports are covered by
watertight caps.
Check that ground cables are securely
connected.
Major: The SUN2000 enters Shutdown mode and stops exporting power to the power
grid due to a fault.
Minor: Some components are faulty but the SUN2000 can still export power to the
power grid.
Warning: The SUN2000 output power decreases due to external factors.
Alarm Cause
Severit
y
Major The PV array is incorrectly configured.
Excessive PV modules are connected
in series to the PV string, and hence
the PV string open-circuit voltage
exceeds the maximum operating
voltage of the SUN2000.

Cause ID 1 corresponds to PV
strings 1 and 2.

Cause ID 2 corresponds to PV
strings 3 and 4.

Cause ID 3 corresponds to PV
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8 Maintenance
Maintenance
Frequency
The first inspection is six
months after the initial
commissioning. From
then on, the interval can
be six or twelve months.
The first inspection is six
months after the initial
commissioning. From
then on, the interval can
be six or twelve months.
Measures
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 operating
voltage of the SUN2000. After the
PV array configuration is
corrected, the alarm stops.
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