SUN2000-(55KTL, 60KTL) Series
User Manual
8 System Maintenance
Issue 02 (2017-07-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
94
Alarm ID Alarm
Name
Alarm
Severity
Possible Cause
Suggestion
Excessive PV modules are
connected in series to PV
strings 5 and 6, and
therefore the PV string
open-circuit voltage
exceeds the inverter
maximum MPP voltage.
Cause ID = 4
The PV array is not
properly configured.
Excessive PV modules are
connected in series to PV
strings 7 and 8, and
therefore the PV string
open-circuit voltage
exceeds the inverter
maximum MPP voltage.
or equal to the maximum inverter
input voltage. After the PV array
configuration is corrected, the
inverter alarm disappears.
Cause ID = 4
Reduce the number of PV
modules connected in series to
PV strings 7 and 8 until the
open-circuit voltage is less than
or equal to the maximum inverter
input voltage. After the PV array
configuration is corrected, the
inverter alarm disappears.
106–113
Abnormal
String 1–8
Warning
Cause ID = 1
The PV string is shielded
from sunlight for a long
time.
The PV string deteriorates
or is damaged.
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.
120–127
String 1–8
Reversed
Cause ID
= 1:
Major
Cause ID
= 2:
Warning
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.
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.
200
Abnormal
DC Circuit
Major
Abnormal external conditions
trigger the protection for the
DC circuit inside the inverter.
The possible causes are as
follows:
Cause ID = 3
The inverter input is
disconnected accidentally,
or the PV string output
Cause ID = 3/10/11
1.
The inverter detects its external
working conditions in real time.
After the fault is rectified, the
inverter automatically recovers.
2.
If the alarm persists, contact
Huawei technical support.
Cause ID = 12/15
