PowerWalker VFI 6000LE Plus - Manual (Page 27)

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4. Maintenance
4.1 Maintenance Safety Instructions
Maintenance Personnel
Risk of electric shock
No matter the UPS is connected to the utility power or not, the
output may have electricity. The parts (battery, capacitor) inside the
unit may still have hazardous voltage after turning off the UPS.
Make sure to disconnect the batteries before carrying out any
kind of maintenance or repair. In this product, the battery is dangerous.
Verify that no voltage between the battery terminals and the
ground is present before maintenance or repair. In this product, the
battery circuit is not isolated from the input voltage. Hazardous
voltages may occur between the battery terminals and the ground.
Verify that no hazardous voltage exists in the energy storage
capacitor before maintenance or repair.
Remove all jewellery, wristwatches, rings and other metal
personal goods before maintenance or repair.
You must read the following safety instructions before
maintenance!
This product must be maintained only by qualified
professional personnel accord to safety instructions!