Huawei SUN2000-15KTL-50KTL-M3 Series User Manual page 39

Replacing SUN2000-(15KTL-50KTL) Series with
SUN2000-(15KTL-50KTL)-M3 Series
User Manual
ID Name
61440 Faulty
monitorin
g unit
2072 Transient
AC
overvolta
ge
2085 Built-in
PID
operation
abnormal
2087 Internal
fan
abnormal
Issue 01 (2021-04-05)
Severity Cause
about to expire.
Minor Cause ID = 1
 The flash memory is
insufficient.
 The flash memory has bad
sectors.
Major Cause ID = 1
The inverter detects that the
phase voltage exceeds the
transient AC overvoltage
protection threshold.
Minor Cause ID = 1, 2
 The output resistance of PV
arrays to ground is low.
 The system insulation
resistance is low.
Major Cause ID = 1–4
The internal fan is
short-circuited, the power
supply is insufficient, or the
fan is damaged.
Copyright © Huawei Technologies Co., Ltd.
Solution
Turn off the AC output switch and
DC input switch, and then turn them
on after 5 minutes. If the alarm
persists, replace the monitoring
board or contact your dealer or
Huawei technical support.
1. If the voltage at the grid
connection point is too high,
contact the local power operator.
2. If you have confirmed that the
voltage at the grid connection
point exceeds the upper threshold
and obtained consent from the
local power operator, modify the
overvoltage protection thresholds.
3. Check whether the peak grid
voltage exceeds the upper
threshold.
 Cause ID = 1
1. Turn off the AC output switch
and DC input switch, wait for
a period of time (for details
about the wait time, see the
description on the device
safety warning label), and
then turn on the DC input
switch and AC output switch.
2. If the alarm persists, contact
your dealer or Huawei
technical support.
 Cause ID = 2
1. Check the impedance between
the PV array output and the
ground. If a short circuit
occurs or the insulation is
insufficient, rectify the fault.
2. If the alarm persists, contact
your dealer or Huawei
technical support.
Turn off the AC output switch and
DC input switch, and then turn them
on after 5 minutes. Wait for the
inverter to connect to the power grid.
If the alarm persists after 5 minutes,
contact your dealer or Huawei
technical support.
9 Maintenance
102