Replacing An Optimizer - Huawei SUN2000 Series User Manual

SUN2000 Smart PV Optimizer
User Manual
Alarm Name
Overtempera
ture
Internal
hardware
fault
Output
backfeed
Abnormal
output
voltage
Upgrade
failed

5.5 Replacing an Optimizer

Issue 04 (2023-04-21)
Cause
The optimizer internal
temperature is too high.
An internal fault
occurred in an optimizer.
Optimizer output
backfeed occurred.
The optimizer output
voltage is abnormal.
The optimizer software
upgrade failed.
NO TE
Contact the service provider if all suggested measures listed above are completed and the
fault still exists.
Copyright © Huawei Digital Power Technologies Co., Ltd.
5 System Maintenance
Suggestion
1. Check the ventilation and ambient
temperature at the optimizer
installation position. If the
ventilation is poor or the ambient
temperature exceeds the upper
threshold, improve the ventilation
and heat dissipation.
2. If the ventilation and ambient
temperature are normal, contact
the installation contractor.
Contact the installation contractor.
1. Check whether PV modules are
severely blocked when PV strings
are connected in parallel.
2. If the fault persists, contact the
installation contractor.
1. When the sunlight is normal,
perform optimizer search again.
2. Check whether the optimizer
output extension cable is correctly
prepared (positive connector at
one end and negative connector
at the other).
3. Check whether the PV string is
correctly connected to the inverter
or whether there is a breakpoint
in the PV string.
4. If the fault persists, contact the
installation contractor.
1. When the sunlight is normal,
perform the optimizer upgrade
again.
2. If the fault persists, contact the
installation contractor.
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