Huawei SUN2000-42KTL User Manual page 90

SUN2000-(36KTL,42KTL)
User Manual
Alarm Alarm
ID Name
106–1 Abnormal
13 String 1–8
120–1 String 1–8
27 Reversed
Issue Draft A (2016-05-30)
Alarm
Possible Cause
Severity
Warning  The PV string is shielded
from sunlight for a long
time.
 The PV string
deteriorates or is
damaged.
Major  Cause ID = 1
The PV string is
reversely connected.

Cause ID = 2
Only a few PV modules
are connected in series to
the PV string, and
therefore the end voltage
is lower than that of
other PV strings.
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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 inverter. If
yes, turn off the two DC switches after
the PV string voltage drops within the
safe voltage range (lower than 60 V
DC), and then correct the PV string
connection.
 Cause ID = 2
Check whether the number of PV
modules connected in series to the
inverter is small. If yes, increase the
number.
8 Maintenance
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