Huawei SUN2000-50KTL-ZHM3 User Manual page 73

SUN2000-(50KTL-ZHM3, 50KTL-M3)
User Manual
ID Name
2021 AFCI
self-
check
failure
2031 Phase
wire
short-
circuited
to PE
2032 Grid loss
2033 Grid
undervol
tage
Issue 03 (2022-08-30)
Severity Cause
Major Cause ID = 1, 2
The AFCI self-check fails.
Major Cause ID = 1
The impedance of the
output phase wire to PE is
low or the output phase
wire is short-circuited to PE.
Major Cause ID = 1
● Power grid outage
occurs.
● The AC circuit is
disconnected or the AC
switch is off.
Major Cause ID = 1
The power grid voltage is
below the lower threshold
or the low-voltage duration
has lasted for more than
the value specified by LVRT.
Copyright © Huawei Technologies Co., Ltd.
8 Maintenance
Solution
Turn off the AC output switch
and DC input switch, and then
turn them on after 5 minutes. If
the alarm persists, contact
Huawei technical support.
Check the impedance of the
output phase wire to PE, locate
the position with low
impedance, and rectify the fault.
1. The alarm is cleared
automatically after the power
grid recovers.
2. Check whether the AC circuit
is disconnected or the AC
switch is off.
1. If the alarm occurs
occasionally, the power grid
may be abnormal
temporarily. The inverter
automatically recovers after
detecting that the power grid
becomes normal.
2. If the alarm persists, check
whether the power grid
voltage is within the
acceptable range. If not,
contact the local power
operator. If yes, modify the
grid undervoltage protection
threshold through the app,
SmartLogger, or NMS with
the consent of the local
power operator.
3. If the alarm persists for a
long time, check the AC
circuit breaker and AC output
power cable.
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