Troubleshooting Optimizers - Huawei SUN2000-440W-IA0 User Manual

SUN2000-440W-IA0 Smart Module
User Manual

4.4 Troubleshooting Optimizers

Table 4-1 Common alarms and troubleshooting measures
Alarm Name
Overtempera
ture
Internal
hardware
fault
Output
backfeed
Issue 01 (2023-09-15)
user manual.) The switch is turned on by default. Turn off the switch to
trigger a rapid shutdown.
Cause
The optimizer internal
temperature is too
high.
The internal hardware
of the optimizer is
faulty.
Optimizer output
backfeed occurred.
Copyright © Huawei Digital Power Technologies Co., Ltd.
4 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
your vendor or Huawei technical
support.
Contact your vendor or Huawei
technical support to replace the faulty
optimizer.
1. Check whether Smart Modules are
shaded when PV strings are
connected in parallel.
2. If the fault persists, contact your
vendor or Huawei technical
support.
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