Huawei SUN2000-30KTL-US User Manual page 96

SUN2000-(25KTL, 30KTL)-US
User Manual
Alarm
Alarm ID
Name
326 Electrical
Grounding
Fault
System
400
Fault
411 AFCI
Self-Check
Failure
412 AFCI
Abnormal
Internal
502
Communic
ation Fault
504 Version
Mismatch
505 Firmware
Upgrade
Failed
Issue Draft C (2016-01-12)
Alarm
Causes
Severity
Major  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.
An unrecoverable fault has
Major
occurred on a circuit inside the
SUN2000.
Major The power distribution cables
are in poor contact or the
detection circuit components
are faulty.
Major PV cables are in poor contact
or short-circuited, causing
electric arcs.
 The communication circuit
Minor
of the SUN2000 is
disturbed.
 The communication circuit
is damaged.
 The internal
communication address is
incorrectly set.
Minor During SUN2000 software
upgrade, the version of the
software loaded is incorrect.
Major Upgrade is not properly
completed.
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Copyright © Huawei Technologies Co., Ltd.
8 Maintenance
Measures
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.
Flip the DC SWITCH on the
SUN2000 to OFF, wait 5 minutes,
and flip the DC SWITCH to ON.
Check whether the fault is rectified.
If the fault persists, contact Huawei
technical support.
1. Manually clear the alarm and
wait for the SUN2000 to perform
a self-check and startup.
2. If the alarm occurs repeatedly,
check whether the power
distribution cables are connected
properly.
3. If the fault persists, contact
Huawei technical support.
Check whether the string cables are
in an open circuit or in poor contact.
1. If the fault is caused by a short
circuit of the communication
circuit inside the SUN2000, the
SUN2000 automatically recovers
to the normal operating status
after the fault is rectified.
2. If the fault persists for a long
time, contact Huawei technical
support.
Check whether you have performed
a software upgrade recently. If yes,
upgrade the software to the correct
version again.
Upgrade again.
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