ABB PST Installation And Maintenance Manual page 115

Low Voltage Products & Systems
ABB Inc. • 888-385-1221 • www.abb-control.com
Chapter 9 - Maintenance
This chapter describes the maintenance required for the softstarter. In principle,
the product is maintenance free but some items should be checked regularly.
Caution!
Do not open the softstarter or touch any live parts when the main and
control voltage is connected.
9:1 Regular maintenance
• Check that all mounting bolts/screws are fastened. Tighten if necessary.
• Check that all connections of main, control- and supply circuits are fastened.
• Tighten the terminal screws and bolts on the connection bars, if necessary.
• Check that the cooling airways are free from dirt and dust. If required, use
pressurised air to clean.
• Check external filters. Clean, if necessary.
• Check that the fan is working and rotating freely. The blades should rotate
without any resistance and this can be checked at voltage free state.
• Check the real time clock and adjust if necessary.
In case of a fault or if a fault can not be reset, see Chapter 11, " Trouble shoot-
ing".
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AC 1006.9 - 5/03