202207V1.1
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DC module connectors and watch for five short LED flashes.
3.Check the AC branch circuit interconnection between all the microinverters. Verify each inverter is energized
by the utility grid as described in the previous step.
4.Make sure that any AC breaker are functioning properly and are closed.
5.Check the DC connections between the microinverter and the PV module.
6.Verify the PV module DC voltage is within the allowable range shown in appendix Technical Data of this
manual.
7.If the problem persists, please call HERF customer support.
*Note: Do not try to repair the microinverter. If the troubleshooting fails, please return it to the factory
for replacement.
5.3Routine Maintenance
1. Only authorized personnel are allowed to carry out the maintenance operations and are responsible to
report any anomalies.
2. Always use the personal protective equipment provided by the employer when carry out the maintenance
operation.
3. During normal operation, check that the environmental and logistic conditions are correct. Make sure that
the conditions have not changed over time and that the equipment is not exposed to adverse weather
conditions and has not been covered with foreign bodies.
4. DO NOT use the equipment if any problems are found, and restore the normal conditions after the fault
removed.
5. Conduct an annual inspection on various components, and clean the equipment with a vacuum cleaner or
special brushes.
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