
11-7
Trips and Fault Finding
890CS Common Bus Supply - Frames B & D; 890CD Common Bus Drive and 890SD Standalone Drive - Frames E & F
6511
Keypad
Display
6901
Keypad
Display
Description
Possible Reason for Trip
SCI
COMMS BREAK
♦
COMMS BREAK parameter set to True (refer to I/O
TRIPS menu at level 3)
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