Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Electrical
Grounding
Fault
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
when the PV strings are
grounded.
a. Check that the neutral wire and
PGND cable are properly
connected.
b. Check that an isolation
transformer is connected to the
SUN2000 at the output side when
the PV strings are grounded.
An unrecoverable fault has
occurred on a circuit inside the
SUN2000.
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.
Internal
Communic
ation Fault
The communication circuit
of the SUN2000 is
interrupted.
The communication circuit
is damaged.
The internal
communication address is
incorrectly set.
a. If the fault is caused by a short
circuit of the communication
circuit inside the SUN2000, the
SUN2000 automatically reverts
to normal operating status after
the fault is rectified.
b. If the fault persists for a long
time, contact Huawei technical
support.
The version of the software
loaded during a software
upgrade is incorrect.
Check whether a recent software
upgrade has been performed. If so,
upgrade the software again to the
correct version.
The upgrade is incomplete.
There is insufficient space
on the flash drive.
The flash drive has bad
blocks or is faulty.
a. Replace the monitoring board.
b. If the monitoring board is built
into the monitoring device,
replace the monitoring device.
If a fault cannot be rectified by the measures listed in Table 8-2, contact Huawei technical support.
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