Huawei SUN2000-30KTL-US User Manual page 92

SUN2000-(25KTL, 30KTL)-US
User Manual
Alarm
Alarm ID
Name
120 to 125 String 1-6
Reverse
200 DC Bus
Voltage
Fault
Issue Draft C (2016-01-12)
Alarm
Causes
Severity
Warning The cables of PV strings are
connected reversely during
SUN2000 installation.
Major Abnormal external conditions
have triggered the protection
for the DC circuits inside the
SUN2000. The possible causes
are as follows:
 Reason ID = 3
The SUN2000 input is
suddenly disconnected, or
the PV strings shielded
result in a sharp change in
output power.
 Reason ID = 9 or 11
The input energy of the
SUN2000 cannot be vented
quickly due to the sharp
change of grid voltage. As a
result, the internal voltage
increases.
 Reason ID = 10
The internal control circuit
of the SUN2000 has failed
to keep pace with changes
due to grid phase
imbalance.
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8 Maintenance
Measures
Check whether the cables of PV
strings are correctly connected. If
they are connected reversely,
reconnect the cables.
1. The SUN2000 monitors its
external working conditions in
real time and automatically
recovers to the normal operating
status after the fault is rectified.
2. If the alarm occurs repeatedly,
contact Huawei technical
support.
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