Trips and Fault Finding
6511
Keypad
Display
6901
Keypad
Display
Description Possible Reason for Trip
CNTC CONTACTOR FBK
♦ The CONTACTOR CLOSED input in the
SEQUENCING LOGIC function block remained
FALSE after a run command was issued
SPD SPEED FEEDBACK
♦ SPEED ERROR > 50.00% for 10 seconds
AOT AMBIENT TEMP
♦ The ambient temperature in the drive is too high
OT MOTOR OVERTEMP The motor temperature is
too high
♦ Excessive load
♦ Motor voltage rating incorrect
♦ FIXED BOOST and/or AUTO BOOST set too high
♦ Prolonged operation of the motor at low speed
without forced cooling
♦ Check setting of INVERT THERMIST parameter in
I/O TRIPS menu at level 3.
♦ Break in motor thermistor connection
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E
890CS Common Bus Supply - Frames B & D; 890CD Common Bus Drive and 890SD Standalone Drive - Frames B, C & D Page
10-7
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