Huawei SUN2000-2KTL-L1 User Manual page 89

SUN2000-(2KTL-6KTL)-L1
User Manual
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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
Issue 03 (2020-07-20)
Major: The SUN2000 enters the shutdown mode or functions abnormally
after a fault occurs.
Minor: Some components are faulty but the SUN2000 can still connect to the
power grid and generate power.
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.
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.
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