Troubleshooting - Huawei SUN 2000 Series User Manual

SUN2000-4.95KTL-JPL0
User Manual

7.2 Troubleshooting

Alarm severities are defined as follows:
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Table 7-2 Common alarms and troubleshooting measures
Alarm ID Alarm
Name
2001 High
String
Input
Voltage
2011 String
Reverse
Connectio
n
2032 Grid Loss
Issue 03 (2020-06-03)
Major: The solar inverter enters the shutdown mode and disconnects from the power grid
to stop generating power after a fault occurs.
Minor: Some components are faulty but the solar inverter can still connect to the power
grid and generate power.
Warning: The solar inverter output power decreases due to external factors.
Alarm Cause
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
solar inverter input voltage.
The following is the mapping
between PV strings and alarm
cause IDs:
 Cause ID 1: PV string 1

Cause ID 2: PV string 2
Major The PV string is reversely
connected.
The following is the mapping
between PV strings and alarm
cause IDs:
 Cause ID 1: PV string 1

Cause ID 2: PV string 2
Major Cause ID = 1
 The power grid experiences
an outage.
 The AC circuit is
disconnected or the AC
switch is off.
Copyright © Huawei Technologies Co., Ltd.
7 System Maintenance
Suggestions
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 solar inverter input
voltage. After the PV array
configuration is corrected, the alarm
disappears.
Check whether the PV string is
reversely connected to the inverter. If
yes, wait until the PV string current
decreases below 0.5 A, set DC
SWITCH to OFF, and adjust the PV
string polarity.
1. Check the AC voltage.
2. Check whether the AC circuit is
disconnected or the AC switch is
off.
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