ABB PST - Page 162

162 Low Voltage Products & Systems
AC 1006.9 - 5/03 ABB Inc. • 888-385-1221 • www.abb-control.com
Status Possible cause
• Check that the parameter
Ext
ByPass
is set to No.
• Check why the contactor is not
opening / closing and make
necessary actions.
• Check that the parameter
Ext
ByPass
is set to Yes.
Temperature too high on the heat
sink. If the fault remains after
reset, the heat sink temperature is
too warm.
• Check that the fans are working in a
proper way.
• Check that the cooling airways are
free from dirt and dust.
• Check that the ambient temperature
is not too high.
Parameter Setting
I
e
is set too
low.
• Setthevalueaccordingtotherated
motor current.
• Setthevalueaccordingto58%
of the rated motor current.
One or several SCRs are shorted. • Check and replace. Contact your
ABB sales office for replacement
parts.
One or several SCRs are not
conducting.
• Check and replace. Contact your
ABB sales office for replacement
parts.
Solution
Bypass fault
Without bypass
With bypass
In Line connected
Inside Delta
Non conducting SCR fault
The bypass contactor is not
closing or opening properly.
Shorted SCR fault
Kick-current fault
Heat sink over-temperature
fault
Chapter 11 - Troubleshooting
Power on ProtectionFault
Fault ByPass
Reset Back
Power on ProtectionFault
Fault HS Temp
Reset Back
Power on ProtectionFault
Fault Kick Cur
Reset Back
Power on ProtectionFault
Fault SC SCR
Reset Back
Power on ProtectionFault
Fault Open SCR
Reset Back
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