ABB PST30, Installation And Commissioning Manual

Page: 187 / 200

Trouble shooting
Chapter 11
187
1SFC132003M0201
PTC protection
An over-temperature is detected
by the PTC thermistors in the
motor. • Check that the PTC circuit is closed and
that the inputs are connected.
• Check and correct the reason for the
overheating.
• Wait for the motor to cool sufficiently and
restart.
Thyristor overload protection
The softstarter is too small.
Too many starts / hour.
The ramp time for start is too
long. • Check and replace the softstarter 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.
Status Possible cause Solution
Power on Protection Fault
Prot PTC
Reset
Back
Power on Protection Fault
Prot SCR OL
Reset
Back