ABB PST30 Installation And Maintenance Manual page 90

11:6 Protection indication (cont.)
PTC protection
Power on Fault Protection
Prot PTC
Reset
SCR overload protection
Power on Fault Protection
Prot SCR OL
Reset
11
11.6
1SXU 132 021 M0201
Chapter 11
Troubleshooting
An over-temperature is detected by the PTC thermis-
tors in the motor
Back
The softstarter is too small
Too many starts/hour
The ramp time for start is too long
Back
Check that the PTC circuit is closed and that the inputs
are connected
Check and correct the reason for the overheating
Check and replace the softstarters with one of a
suitable size
Check and decrease number of starts/hour
Check that current limit level is not set too low
Check that the ramp time for start is not too long
Low Voltage Products & Systems
ABB Inc. • 888-385-1221 • www.abb-control.com