Huawei SUN2000L - Page 134

SUN2000L-(2KTL-5KTL)
User Manual
8 System Maintenance
Issue 02 (2017-12-12)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
127
Alarm ID
Alarm
Name
Alarm
Severity
Possible Cause
Suggestion
2011
String
Reversed
Major
The PV string is reversely
connected.
Check whether the PV string is
reversely connected to the
SUN2000L. 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
2032
Grid
Failure
Major
Cause ID = 1

The power grid experiences
an outage.

The AC circuit is
disconnected or AC switch
is off.
1. Check the AC voltage.
2. Check that the AC power cable is
connected and that the AC switch
is ON.
2033
Grid
Undervolt
age
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.
1. If the alarm occurs accidentally,
the power grid may be abnormal
temporarily. The SUN2000L
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
overvoltage and 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.