ABB PST Installation And Maintenance Manual page 162

Status
Bypass fault
Power on
Fault ByPass
Reset
Heat sink over-temperature
fault
Power on
Fault HS Temp
Reset
Kick-current fault
Power on
Fault Kick Cur
Reset
Shorted SCR fault
Power on
Fault SC SCR
Reset
Non conducting SCR fault
Power on
Fault Open SCR
Reset
162
AC 1006.9 - 5/03
Chapter 11 - Troubleshooting
Possible cause
The bypass contactor is not
closing or opening properly.
Fault Protection
Back
Temperature too high on the heat
sink. If the fault remains after
reset, the heat sink temperature is
Fault Protection
too warm.
Back
Parameter Setting I
low.
Fault Protection
Back
One or several SCRs are shorted. • Check and replace. Contact your
Fault Protection
Back
One or several SCRs are not
conducting.
Fault Protection
Back
Solution
Without bypass
• Check that the parameter Ext
ByPass is set to No.
With bypass
• Check why the contactor is not
opening / closing and make
necessary actions.
• Check that the parameter Ext
ByPass is set to Yes.
• 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.
is set too
e
In Line connected
• Set the value according to the rated
motor current.
Inside Delta
• Set the value according to 58%
of the rated motor current.
(1/( 3))
ABB sales office for replacement
parts.
• Check and replace. Contact your
ABB sales office for replacement
parts.
Low Voltage Products & Systems
ABB Inc. • 888-385-1221 • www.abb-control.com