SUN2000-(25KTL, 30KTL)-US
User Manual
8 Maintenance
Issue 03 (2017-04-01)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
95
Alarm ID Alarm
Name
Alarm
Severity
Causes
Measures
318
Residual
Current
Abnormal
Major
Cause ID = 1
The insulation resistance
against the ground at the input
side decreases during SUN2000
operation, which causes
excessively high residual
current.
1.
If the alarm occurs accidentally,
possibly the external circuits are
abnormal accidentally. The
SUN2000 automatically recovers
to the normal operating status
after the fault is rectified.
2.
If the alarm occurs repeatedly or
lasts a long time, check whether
the insulation resistance against
the ground of PC strings is too
low.
321
Cabinet
Over-Tem
p
Major
Cause ID = 1
The SUN2000 is installed in
a place with poor
ventilation.
The ambient temperature is
too high.
The internal fan is not
working.
Check the ventilation and
ambient temperature of the
SUN2000 installation position.
If the ventilation is poor or the
ambient temperature exceeds the
upper threshold, improve the
ventilation and heat dissipation.
If the ventilation and ambient
temperature both meet
requirements, contact Huawei
technical support.
322
Abnormal
SPI
Communi
cation
Major
Cause ID = 1
An unrecoverable fault has
occurred on a circuit inside the
SUN2000.
Turn off the AC output switch and
DC input switch, and then turn them
on after 5 minutes. If the fault
persists, contact Huawei technical
support.
326
Electrical
Grounding
Fault
Major
Cause ID = 1
The neutral wire or PGND
cable is not connected to the
SUN2000.
The isolation transformer is
not connected to the
SUN2000 at the output side
if the PV strings are
grounded.
1.
Check that the neutral wire and
PGND cable are properly
connected.
2.
Check that an isolation
transformer is connected to the
SUN2000 at the output side if the
PV strings are grounded.
400
System
Fault
Major
Cause ID = 1/3/21/23/27
An unrecoverable fault has
occurred on a circuit inside the
SUN2000.
Turn off the AC output switch and
DC input switch, and then turn them
on after 5 minutes. If the fault
persists, contact Huawei technical
support.