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7 Routine Maintenance
7.1 Overview
Due to ambient temperature, relative humidity, windblown dust and vibrations,
components of PVS will get aging. It is necessary to do the routine maintenance
work periodically on the device.
Only qualified electricians can do the maintenance work described in this
chapter.
After the maintenance work finished, be sure not to leave screws, washers
and the like in the PVS. The device can be damaged!
Before performing maintenance, troubleshooting, and other operations on the
PVS, stop it and ensure that the operating area is voltage free.
7.2 Replace the Fuse
Once the fuse is blown, the damage is irrecoverable. Replace the fuse by
qualified operators in time.
Replace the fuse with new one with the same model and the same grade.
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