Replacing An Optimizer - Huawei SUN2000-440W-IA0 User Manual

SUN2000-440W-IA0 Smart Module
User Manual
Alarm Name
Abnormal
output
voltage
Upgrade
failed

4.5 Replacing an Optimizer

Prerequisites
●
●
Procedure
Step 1 Wear insulated gloves.
Issue 01 (2023-09-15)
Cause
The optimizer output
voltage is abnormal.
The optimizer software
upgrade failed.
NO TE
If you cannot rectify faults with the measures listed in the "Suggestion" column, contact
your vendor or Huawei technical support.
Use dedicated insulated tools, and wear insulated shoes and insulated gloves
before performing operations.
Prepare a new optimizer.
Copyright © Huawei Digital Power Technologies Co., Ltd.
4 System Maintenance
Suggestion
1. Perform optimizer search again
when the irradiance is normal.
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 your
vendor or Huawei technical
support.
Note: The polarity at the two ends
of an extension cable must be
opposite (positive connector at one
end and negative connector at the
other). For details about how to
determine the polarity of the PV
string, see section 5 "Connecting
Smart Module Cables" in the
Smart Module Quick Guide .
1. Perform optimizer upgrade again
when the irradiance is normal.
2. If the fault persists, contact your
vendor or Huawei technical
support.
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