8
6
Replacing an Optimizer
1. Power off the solar inverter and remove
the faulty optimizer.
2. Install a new optimizer and correctly
connect its cables.
3. Power on the solar inverter. On the Device
Commissioning screen, choose
Maintenance > Subdevice management
,
and tap
Auto search
to add the new
optimizer.
4. On the Device Commissioning screen,
choose
Maintenance > Optimizer layout
,
select the corresponding PV module, and
bind the new optimizer. Click
Submit
.
1
2
3
4
The optimizer uses Staubli MC4 DC connectors. Ensure that the DC connectors to be connected
are of this model. If the DC connectors to be connected are not of the Staubli MC4 model, the
connector compatibility report and third-party lab (TUV, VED, or Bureau Veritas) report from
the DC connector manufacturer must be available. Using incompatible DC connectors may
result in serious consequences. The resulting device damage is beyond the warranty scope.
The optimizer is not supported in the pure off-grid ESS networking. Otherwise, the system may
fail to start.
Partial configuration scenario: The total open-circuit voltage of the PV modules in a PV string
cannot exceed the maximum input voltage of the solar inverter under any condition.
7
Precautions
Fault Alarm
Cause
Suggestions
Upgrade failed
The optimizer
software
upgrade failed.
1. When the sunlight is normal, perform the optimizer upgrade
again.
2. If the fault persists, contact your dealer or Huawei technical
support.
