Huawei SUN2000 Series User Manual page 73

SUN2000-(3KTL-10KTL)-M0
User Manual
Alarm ID Alarm
Name
2021 AFCI
Self-Chec
k Failure
Phase
2031
Wire
Short-Circ
uited to PE
2032 Grid Loss
2033 Grid
Undervolt
age
Issue 04 (2019-10-18)
Alarm Possible Cause
Severity
Major Cause ID = 1, 2
AFCI 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
 The power grid experiences
an outage.
 The AC power cable is
disconnected or the AC
circuit breaker is OFF.
Major Cause ID = 1
The 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.
Troubleshooting Suggestion
Turn off the AC output switch and
DC input switch, and then turn them
on after 5 minutes. If the fault
persists, contact your dealer or
Huawei technical support.
Check the impedance of the output
phase wire to PE, locate the position
with lower impedance, and rectify
the fault.
1. Check that the AC voltage is
normal.
2. Check that the AC power cable is
connected and that the AC switch
is ON.
1. If the alarm occurs accidentally,
the power grid may be abnormal
temporarily. The inverter
automatically recovers after
detecting that the power grid
becomes normal.
2. If the alarm occurs frequently,
check whether the grid voltage is
within the acceptable range. If no,
contact the local power operator.
If yes, login to the mobile phone
app, SmartLogger, or NMS to
modify the grid undervoltage
protection threshold with the
consent of the local power
operator.
3. If the fault persists, check the
connection between the AC
switch and the output power
cable.
7 Maintenance
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