Huawei SUN2000-2KTL-L0 User Manual page 67

SUN2000-(2KTL-5KTL)-L0
User Manual
Alarm ID Alarm Name
2011 String Reversed
2032 Grid Failure
2033 Grid
Undervoltage
Issue 01 (2018-08-30)
Alarm Possible Cause
Severity
Major The PV string is
reversely connected.
Major Cause ID = 1
 The power grid
experiences an
outage.
 The AC circuit is
disconnected or AC
switch is off.
Major Cause ID = 1
The grid voltage is
below the lower
threshold or the low
voltage duration has
lasted for more than the
value specified by
LVRT.
Copyright © Huawei Technologies Co., Ltd.
7 System Maintenance
Suggestion
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 DC switch and
correct the PV string polarity.
The following is the mapping
between PV strings and alarm cause
IDs:

Cause ID = 1: string 1
 Cause ID = 2: string 2
1. Check the AC voltage.
2. Check that the AC power cable is
connected and that the AC switch
is ON.
1. If the alarm occurs accidentally,
the power grid may be abnormal
temporarily. The SUN2000
automatically recovers after
detecting that the power grid
becomes normal.
2. If the alarm occurs frequently,
check whether the grid voltage is
within the acceptable range. If no,
contact the local power operator.
If yes, modify the power grid
undervoltage protection
thresholds with the consent of the
local power operator.
3. If the fault persists for a long
time, check the connection
between the AC switch and the
output power cable.
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