Huawei SUN2000-33KTL-JP User Manual page 120

SUN2000-(33KTL, 40KTL)-JP
User Manual
Ala Alarm Alarm
rm Name Severit
ID y
313 Low Major
Insulatio
n
Resistanc
e
318 Abnorma Major
l
Residual
Current
321 Cabinet Major
Overtem
perature
322 Abnorma Major
l SPI
Commun
ication
326 Abnorma Major
l
Groundin
g
System
400 Major
Fault
410 Abnorma Major
l
Issue 07 (2019-06-30)
Possible Cause
Cause ID = 1

A short circuit occurs
between the PV string and
the PGND cable.
 The PV string is installed
in a moist environment for
a long time.
Cause ID = 1
The insulation resistance
against the PGND cable at the
input side decreases when the
SUN2000 is running, which
causes an excessively high
residual current.
Cause ID = 1
 The inverter is installed in
a place with poor
ventilation.

The ambient temperature
exceeds the upper
threshold.
 The internal fan works
abnormally.
Cause ID = 1
An unrecoverable fault occurs
on a circuit inside the
SUN2000.
Cause ID = 1

The PGND cable does not
connect to the inverter.
 The SUN2000 output side
does not connect to an
isolation transformer when
the PV string output is
grounded.
Cause ID = 1/3/21/23/27
An unrecoverable fault occurs
on a circuit inside the
SUN2000.
Cause ID = 4
The sampling control board
Copyright © Huawei Technologies Co., Ltd.
Suggestion
1. Check the impedance between the PV
string and the PGND cable. If a short
circuit occurs, rectify the fault.
2. If you are sure that the impedance is less
than the default value in a cloudy or rainy
environment, log in to the SUN2000 app,
SmartLogger, or NMS and set Insulation
resistance protection.
1. If the alarm occurs accidentally, the
external circuit may be abnormal
temporarily. The SUN2000 automatically
recovers after fault is rectified.
2. If the alarm occurs repeatedly or persists,
check whether the impedance between the
PV string and the ground is excessively
low.
1. Check the ventilation and ambient
temperature of the SUN2000 installation
position.
2. If the ventilation is poor or the ambient
temperature exceeds the upper threshold,
improve the ventilation and heat
dissipation.
3. If the ventilation and ambient temperature
both meet requirements, contact Huawei
technical support.
Turn off the AC output switch and DC input
switch. Then turn on the AC output switch
and DC input switch after 5 minutes. If the
fault persists, contact Huawei technical
support.
1. Check that the PGND cable properly
connects to the inverter.
2. If the PV string output is grounded, check
that the SUN2000 output side connects to
an isolation transformer.
Turn off the AC output switch and DC input
switch. Then turn on the AC output switch
and DC input switch after 5 minutes. If the
fault persists, contact Huawei technical
support.
1. When the alarm is generated, the inverter
shuts down automatically. When the fault
9 Maintenance
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