Low Voltage Products & Systems 161
ABB Inc. • 888-385-1221 • www.abb-control.com AC 1006.9 - 5/03
Chapter 11 - Troubleshooting
11:4 Fault Indication
Status Possible cause
The main contactor or circuit
breaker is open.
• Check and close contactor / breaker
or any external switching device.
Fuse blown. • Check and replace the fuse in all
three (3) phases
Any external device open /
tripped.
The motor connection is not
correct.
• Check that there are no connections
missin
to the motor.
• Check that the connections are
carried out correctly
Shorted SCR at start. • Check and replace.
• Check that there are no connections
missing to the motor.
• Check that the circuits are closed
and correspond to the circuit
diagram.
Shorted SCR at start. • Check and replace.
The frequency is out of range.
(47.5 - 52.5Hz or 57 - 63Hz
• Check and correct the frequency.
The main voltage is not correct on
the line side.
• Check and correct voltage on the
line side.
Frequency fault
Line side Fault
Phase loss fault
In Line connected
Inside Delta connected
Connection fault
Solution
Power on ProtectionFault
Fault Phase Loss
Reset Back
Power on ProtectionFault
Fault Connection
Reset Back
Power on ProtectionFault
Fault Wrong Freq
Reset Back
Power on ProtectionFault
Fault Line Side
Reset Back
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