ABB PST Series Installation And Commissioning Manual page 162

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Power on Fault Protection
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Power on Fault Protection
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Power on Fault Protection
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Power on Fault Protection
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1RQ FRQGXFWLQJ WK\ULVWRU IDXOW One or several SCRs are not
Power on Fault Protection
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162
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The by-pass contactor is not
closing or opening properly.
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Temperature too high on the
heat sink. If the fault remains
after reset, the heat sink temper-
ature is too warm.
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Parameter 6HWWLQJ ,
low.
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One or several SCRs are
shorted.
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conducting.
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• Check that the parameter ([W %\3DVV is
set to No.
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• Check why the contactor is not opening /
closing and make necessary actions.
• Check that the parameter ([W %\3DVV is
set to Yes
• Check that the fans are working in a
proper way.
• Check that cooling airways are free from
dirt and dust.
• Check that the ambient temperature is
not too high.
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is set too
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• Set the value according to the rated
motor current.
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• Set the value according to 58% (
of the rated motor current.
• Check and replace. Contact your ABB
sales office for replacement kit.
• Check and replace. Contact your ABB
sales office for replacement kit.
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