Huawei SUN2000-175KTL-H0 User Manual page 81

SUN2000-(175KTL-H0, 185KTL-INH0, 185KTL-H1)
User Manual
Alarm Alarm
ID Name
2031 Phase
Wire
Short-Cir
cuited to
PE
Grid
2032
Loss
2033 Grid
Undervol
tage
2034 Grid
Overvolt
age
Issue 02 (2019-06-05)
Alarm Cause
Severit
y
Major The impedance of the output phase
wire to PE is low or the output phase
wire is short-circuited to PE.
1. The power grid experiences an
Major
outage.
2. The AC circuit is disconnected or
the AC switch is off.
Major The grid voltage is below the lower
threshold or the undervoltage duration
has exceeded the time that triggers
LVRT.
Major The grid voltage is beyond the upper
threshold or the overvoltage duration
has exceeded the time that triggers
HVRT.
Copyright © Huawei Technologies Co., Ltd.
8 Maintenance
Troubleshooting Suggestions
Check the impedance of the
output phase wire to PE, locate the
position with lower impedance,
and rectify the fault.
1. The alarm is automatically
cleared after the power grid is
restored.
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 occurs frequently,
check whether the power grid
voltage is within the
acceptable range. If not,
contact the local power
operator. If it is, modify the
power grid undervoltage
protection thresholds with the
consent of the local power
operator.
3. If the fault persists for a long
time, check the AC circuit
breaker and AC output power
cable.
1. Check whether the grid
connection voltage exceeds the
upper threshold. If yes, contact
the local power operator.
2. If you have confirmed that the
grid connection voltage
exceeds the upper threshold
and obtained the consent of the
local power operator, modify
the overvoltage protection
threshold.
3. Check whether the peak grid
voltage exceeds the upper
threshold.
75