Huawei SUN2000 Series User Manual page 94

SUN2000-(29.9KTL, 33KTL-A, 36KTL, 42KTL)
User Manual
Alarm ID Alarm
Name
106–113 Abnormal
String 1–8
120–127 String 1–8
Reversed
Issue 11 (2019-06-08)
Alarm Possible Cause
Severity
Warning Cause ID = 1

The PV string is shielded
from sunlight for a long
time.
 The PV string deteriorates
or is damaged.
Cause ID  Cause ID = 1
= 1:
The PV string is reversely
Major
connected.
Cause ID
 Cause ID = 2
= 2:
Only a few PV modules are
Warning
connected in series to the
PV string, and therefore the
end voltage is lower than
that of other PV strings.
Copyright © Huawei Technologies Co., Ltd.
Suggestion
1. Check whether the PV string
current is obviously lower than
the currents of other PV strings.
2. If yes, check whether the PV
string is shielded from sunlight.
3. If the PV string is clean and not
shielded from sunlight, check
whether any PV module is faulty.
 Cause ID = 1
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
two DC switches and correct the
PV string connection.
 Cause ID = 2
Check whether the number of PV
modules connected in series to
the SUN2000 is small. If yes,
increase the number.
8 Maintenance
87