Huawei SUN2000-111KTL-NHM0 User Manual page 114

SUN2000-111KTL-NHM0
User Manual
Alarm Alarm
ID Name
2009 String
Short-
Circuited
to Ground
2011 String
Reverse
Connection
Issue 09 (2023-12-18)
Alarm Possible Causes
Severity
Major 1. A short circuit has occurred
between the PV array and the
ground.
2. The ambient air of the PV array
is damp and the insulation
between the PV array and the
ground is poor.
Major Cause ID = 1–20: PV1–PV20
The PV string is reversely
connected.
Copyright © Huawei Technologies Co., Ltd.
8 Maintenance
Suggestions
1. Check the output-to-
ground impedance of
the PV array. If a short
circuit or inadequate
insulation is detected,
rectify it.
2. If auto recovery from
string-to-ground short-
circuit protection is
disabled, check and
rectify the preceding
faults, and manually
clear the alarm.
3. If auto recovery from
string-to-ground short-
circuit protection is
enabled, the alarm will
be automatically
cleared after fault
recovery.
1. Check whether the PV
string is connected to
the device in reverse
polarity. If yes, wait
until the PV string
current decreases to
below 0.5 A, set DC
SWITCH to OFF, and
adjust the PV string
polarity.
2. If the fault persists,
reset the device on the
local maintenance app
or WebUI of the
upper-layer controller.
Alternatively, you can
turn off the AC and DC
switches, wait for 5
minutes, and then turn
on the AC and DC
switches.
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