Danfoss VLT FC 102 Operating Instructions Manual page 56

Commissioning
Inspect for
Grounding
Input and output power
wiring
Panel interior
Switches
Vibration
5 5
Table 5.1 Start-up Checklist
54
®
VLT HVAC Drive FC 102 Low Harmonic Drive
Description
•
The unit requires a ground wire from its enclosure to the building ground.
•
Check for good ground connections that are tight and free of oxidation.
•
Grounding to conduit or mounting the back panel to a metal surface is not sufficient.
•
Check for loose connections.
•
Check that motor and mains are in separate conduit or separated screened cables.
•
Inspect that the unit interior is free of debris and corrosion.
•
Ensure that all switch and disconnect settings are in the proper positions.
•
Check that the unit is mounted solidly or that shock mounts are used, as necessary.
•
Check for an unusual amount of vibration.
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