Huawei SUN2000 Series User Manual page 96

SUN2000-(29.9KTL, 33KTL-A, 36KTL, 42KTL)
User Manual
Alarm ID Alarm
Name
202 Abnormal
Invert
Circuit
Issue 11 (2019-06-08)
Alarm Possible Cause
Severity
Major Abnormal external conditions
trigger the protection for the
inverter circuit inside the
SUN2000. The possible causes
are as follows:

Cause ID = 13
The grid voltage drops
dramatically or the power
grid is short-circuited,
which damages the internal
voltage detection circuit in
the SUN2000.
 Cause ID = 14
The grid voltage drops
dramatically or the power
grid is short-circuited. As a
result, the inverter transient
output current exceeds the
upper threshold and
therefore the inverter
protection is triggered.
 Cause ID = 16
The DC current in the
power grid exceeds the
upper threshold.
 Cause ID = 20
The inverter output is
short-circuited. As a result,
the output current surges to
a value above the upper
limit, and the inverter
protection is triggered.
Copyright © Huawei Technologies Co., Ltd.
Suggestion
Cause ID = 13/14/16
1. The inverter detects its external
working conditions in real time.
After the fault is rectified, the
SUN2000 automatically recovers.
2. If the alarm persists, contact
Huawei technical support.
Cause ID = 20
1. Check the inverter output cable
for short-circuits.
2. If the alarm persists, contact
Huawei technical support.
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