ID
Name
Severity Cause
Solution
2021
AFCI self-
check
failure
Major
Cause ID = 1, 2
The AFCI self-check fails.
Turn off the AC output switch
and DC input switch, and then
turn them on after 5 minutes. If
the alarm persists, contact your
dealer or Huawei technical
support.
2031
Phase
wire
short-
circuited
to PE
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.
Check the impedance of the
output phase wire to PE, locate
the position with low
impedance, and rectify the fault.
2032
Grid loss
Major
Cause ID = 1
● Power grid outage
occurs.
● The AC circuit is
disconnected or the AC
switch is off.
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.
2033
Grid
undervolt
age
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 low
voltage ride-through
(LVRT).
1. If the alarm occurs
occasionally, the power grid
may be abnormal
temporarily. The SUN2000
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 mobile
app, SmartLogger, or network
management system (NMS)
with the consent of the local
power operator.
3. If the alarm persists for a
long time, check the
connection between the AC
circuit breaker and the output
power cable.
SUN2000-(3KTL-10KTL)-M1
User Manual
8 Maintenance
Issue 02 (2020-11-20)
Copyright © Huawei Technologies Co., Ltd.
86
