Troubleshooting - Huawei SUN2000-50KTL-JPM0 User Manual

SUN2000-(50KTL-JPM0, 50KTL-JPM1, 63KTL-JPM0)
User Manual

8.3 Troubleshooting

Alarm severities are defined as follows:



Table 8-3 Common alarms and troubleshooting measures
Alarm Alarm
ID Name
2001 High
String
Input
Voltage
2011 String
Reverse
Connect
ion
Issue 01 (2018-09-30)
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
Severity
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
strings 5 and 6.
 Cause ID 4 corresponds to PV
strings 7 and 8.

Cause ID 5 corresponds to PV
strings 9 and 10.
 Cause ID 6 corresponds to PV
strings 11 and 12.
Major The PV string is reversely connected.
Cause IDs 1 to 12 respectively
correspond to PV strings 1 to 12.
Copyright © Huawei Technologies Co., Ltd.
8 Maintenance
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.
Check whether the PV string is
reversely connected to the
SUN2000. If yes, wait until the
solar irradiance declines at night
and the PV string current reduces
to below 0.5 A. Then, turn off the
two DC switches and correct the
PV string connection.
92