Hoymiles HM-300NT, Руководство пользователя

Страница: 20 / 29

© 2019 Hoymiles Converter Technology Co., Ltd. All rights reserved. 20
HM-300NT/HM-350NT/HM-400NT
Ø
Do not try to repair the microinverter. If the troubleshooting fails, please return it to the factory for replacement.
6.4 Routine 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.
Do not attempt to dismantle the Microinverter or make any internal repairs! In order to preserving the
integrity of safety and insulation, the Microinverters are not designed to allow internal repairs!
The AC output wiring harness (AC drop cable on the Microinverter) cannot be replaced. If the cord is
damaged the equipment should be scrapped.
Maintenance operations must be carried out with the equipment disconnected from the grid (power
switch open) and the photovoltaic modules obscured or isolated, unless otherwise indicated.
For cleaning, do not use rags made of filamentary material or corrosive products that may corrode
parts of the equipment or generate electrostatic charges.
Avoid temporary repairs. All repairs should be carried out using only genuine spare parts.
Each branch should provide a circuit breaker, but no need for central protection unit.
6.5 Replace Microinverter
a. How to remove the Microinverter.
Ø De-energize the AC branch circuit breaker.
Ø Remove the PV panel from the racking, and cover the panel.
Ø Using a meter to measure and make sure there is no current flowing in the DC wires between
panel and microinverter.