Alar
m ID
Alarm
Name
Alarm
Severity
Possible
Causes
Troubleshooting
2062 Low
insulati
on
resistan
ce
Major Cause ID = 1
● The PV array
is short-
circuited
with PE.
● The PV
string has
been in a
moist
environment
for a long
time and the
circuit is not
well
insulated to
ground.
1. Check the impedance
between the PV string and
the PE cable. If a short circuit
occurs, rectify the fault.
2. Check whether the PE cable
of the inverter is correctly
connected.
3. If you have
conrmed that
the impedance is lower than
the
specied protection
threshold in a cloudy or rainy
environment, log in to the
app, SmartLogger, or NMS
and set Insulation resistance
protection threshold.
2063 Cabinet
overte
mperat
ure
Minor Cause ID = 1
● The inverter
is installed
in a place
with poor
ventilation.
● The ambient
temperature
exceeds the
upper
threshold.
● The inverter
is not
operating
properly.
1. Check the ventilation and
ambient temperature at the
inverter installation position.
2. If the ventilation is poor or
the ambient temperature
exceeds the upper threshold,
improve the ventilation and
heat dissipation.
3. If both the ventilation and
ambient temperature meet
requirements yet the alarm
persists, contact your dealer
or Huawei technical support.
2064 Device
fault
Major Cause ID = 1–5,
7–12
An
unrecoverable
fault occurs on
a circuit inside
the inverter.
Turn o 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.
NOTICE
Cause ID = 1: Perform the preceding
operations when the PV string
current is less than 1 A.
SUN2000-(12K-25K)-MB0 Series
User Manual 7 System Maintenance
Issue 01 (2023-04-30) Copyright © Huawei Digital Power Technologies Co., Ltd. 94
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