Huawei SUN2000-2KTL-L1 User Manual page 85

SUN2000-(2KTL-5KTL)-L1
User Manual

Table 8-2 Common alarms and troubleshooting measures
Alarm ID Alarm
Name
2001 High
String
Input
Voltage
2002 DC Arc
Fault
2011 String
Reversed
2021 AFCI
Check
Failure
2032 Grid
Failure
Issue 01 (2020-04-17)
Warning: The SUN2000 functions normally, but its output power decreases due to
external factors.
Alarm Possible Causes
Severity
Major The PV array is not properly
configured. Excessive PV
modules are connected in
series to the PV string, and
therefore the open-circuit
voltage exceeds the maximum
SUN2000 operating voltage.
Cause ID = 1, 2

1: The PV1 input voltage is
high.
 2: The PV2 input voltage is
high.
Major The PV string power cables arc
or are in poor contact.
Cause ID = 1, 2

1: PV1 DC arc fault
 2: PV2 DC arc fault
Major The PV string is reversely
connected.
Cause ID = 1, 2
 1: PV1 is reversely
connected.
 2: PV2 is reversely
connected.
Major The AFCI check fails.
Cause ID = 1, 2
 1: The AFCI check circuit
is abnormal.
 2: The AFCI circuit is
faulty.
Major Cause ID = 1
 The power grid experiences
an outage.
 The AC circuit is
disconnected or the AC
circuit breaker is OFF.
Copyright © Huawei Technologies Co., Ltd.
8 System Maintenance
Troubleshooting
Check the serial connection
configuration of the PV string and
ensure that the PV string open-circuit
voltage is not greater than the
maximum operating voltage of the
SUN2000. After the PV array
configuration is corrected, the alarm
disappears.
Check whether the string cables arc
or are in poor contact.
Check whether the PV string is
reversely connected to the SUN2000.
If yes, wait until the PV string
current decreases below 0.5 A, set
DC switch to OFF, and adjust the PV
string polarity.
Turn off the AC output switch and
DC input switch, and then turn them
on after 5 minutes. If the fault
persists, contact your dealer or
Huawei technical support.
1. Check the AC voltage.
2. Check whether the AC circuit is
disconnected or the AC circuit
breaker is OFF.
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