Huawei SUN2000-45KTL-US-HV-D0 User Manual page 93

SUN2000-45KTL-US-HV-D0
User Manual
Alarm ID Alarm
Name
313 Low
Insulation
Resistance
318 Abnormal
Residual
Current
321 Cabinet
Overtempe
rature
322 Abnormal
SPI
Communic
ation
326 Abnormal
Grounding
Issue 02 (2017-09-15)
Alarm Possible Cause
Severity
Major 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.
Major Cause ID = 1
The insulation resistance
against the PGND cable at the
input side decreases when the
inverter is running, which
causes an excessively high
residual current.
Major 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.
Major Cause ID = 1
An unrecoverable fault occurs
on a circuit inside the inverter.
Major Cause ID = 1
The neutral wire or PGND

cable does not connect to
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Copyright © Huawei Technologies Co., Ltd.
9 System Maintenance
Suggestion
automatically recovers after
detecting that the power grid
becomes normal.
2. If the alarm occurs frequently,
check whether the power grid
frequency is within the
acceptable range. If no, contact
the local power operator.
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
inverter 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
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 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 neutral wire or
PGND cable properly connects to
the inverter.
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