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12 Routine Maintenance
12.1 Safety Instructions
Due to ambient temperature, humidity, dust, and vibration, the inverter and the internal
components will age and wear. To ensure the system safety and maintain the efficiency
of the inverter, it is necessary to carry out routine and periodic maintenance.
All measures, which can help the inverter work in good conditions, are within the
maintenance scope.
Lethal voltage inside the inverter!
After the inverter stops, wait at least 20 minutes before opening the cabinet
door. Make sure the internal device is completely voltage-free before
performing any work on the inverter.
Only qualified personnel can perform the work described in this chapter.
Do not leave any screws, washers, or other metallic parts inside the inverter to
avoid damages to the inverter.
Sand and moisture penetration may affect the performance of electric devices
inside the inverter!
•
Do not perform electrical connection in sandy season or when the ambient
relative humidity is above 95%.
•
Perform electrical connection on fine weather days.
Voltages may still be present on cable connection terminals inside the AC and
DC cabinets even though the AC & DC switches are disconnected. To avoid
electric shock hazard, perform the following operations before starting
maintenance work,
•
Disconnect the AC & DC switches;
•
Disconnect the upstream and downstream switches of the inverter.
