ABB PST30 Installation And Commissioning Manual page 125

1SFC132003M0201
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 supply 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 pressurized air to clean.
• Check external filters. Clean, if necessary.
• Check that the fan is working and rotating freely. The
blades shall 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 shooting" .
9:2 Service and repair
In case the softstarter has to be repaired, a spare parts list
and necessary instructions are available at
www.abb.com/lowvoltage.
Service and repair should be performed buy authorized
personnel only. Note that unauthorized repair may affect the
warranty.
• Spare part list
• Changing PCB
• Changing of SCR
(PSS/PST)
• Changing of SCR
(PSTB)
Maintenance
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Chapter 9
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