Low Voltage Products & Systems 159
ABB Inc. • 888-385-1221 • www.abb-control.com AC 1006.9 - 5/03
11:1 General
This chapter is a guide that can be used in case problems arise with
the softstarter or the application.
The softstarter normally indicates a fault with LED Fault, and the
LCD displays what type of fault it is. When a protection is activated,
it will be indicated with LED Protection and the LCD displays what
type of protection is active.
Faults not displayed in the softstarter can also be found in this
chapter.
11:2 General problems and faults
Chapter 11 - Troubleshooting
Status Possible cause
Shorted SCR • Check and replace.
By-pass contactor stuck in closed
position.
• Check and correct the reason.
Bad motor sound during start
and operation.
Inside Delta connection wrong. • Check and correct the wiring.
Bad motor sound during stop. Wrong ramp time for stop.
• Try different ramp times (some
adjustments may be necessary for
best result).
Control wiring not correct
• Check connections for start and
stop.
Start and stop command given at
thesametime.
•
Check that start and stop command
is not given at the same time.
Keypad is in Local Control menu.
• Check that the keypad is not in
Local Control menu.
• Check that parameter Fieldbus Ctrl
is set to No.
Setting of fieldbus parameter
wrong.
• Check that parameter Fieldbus Ctrl
is set to Yes.
• Check that bit "Enable" is used.
•
Check that programmable inputs
have correct settings.
Motor humming / starts without
given start signal.
Motor does not start when
giving start command using the
hardware inputs.
Solution
Motor does not start when
giving start command using the
fieldbus communication.
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