Alarm
ID
Alarm
Name
Alarm
Severity
Possible Cause Suggestion
2088 Abnorma
l DC
protectio
n unit
Major ● Cause ID = 1
The fuse is not in position or is
blown.
● Cause ID = 2
The two relays on the breaking
board are open-circuited.
● Cause ID = 3
The contact points of the DC
switches are stuck.
● Cause ID = 1/2
Turn o 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 technical
support.
● Cause ID = 3
If the PV indicator (LED1)
is
o, contact your dealer
or Huawei technical
support to replace the
device. If the PV indicator
(LED1) is on, wait until the
PV string current
decreases to below 0.5 A.
Then turn
o the AC
output switch and then
the DC input switch. After
5 minutes, turn on the AC
output switch and the DC
input switch. Wait until
the inverter connects to
the power grid. If the fault
persists after 5 minutes,
contact your dealer or
technical support for
replacement.
2093
Abnorma
l DC
Switches
Minor Cause ID=1
The DC switch is not in the ON
position, or the DC switch reset
button is not pressed down to the
bottom.
Check whether all DC
switches are in the ON
position. If not, turn the
switches to the ON position
(you can rotate the switches
with force to ensure that they
are in position). If the
switches still cannot be
turned to the ON position,
press the reset buttons of all
DC switches inwards until
they cannot be moved
further, and then turn on the
DC switches again.
SUN2000-(100KTL, 110KTL, 115KTL)-M2
User Manual 8 Maintenance
Issue 02 (2022-06-30) Copyright © Huawei Technologies Co., Ltd. 103
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