Trips and Fault Finding
6511
Keypad
Display
6901
Keypad
Display
Description Possible Reason for Trip
OC OVERCURRENT The motor current being
drawn from the drive is too
high
♦ Trying to accelerate a large inertia load too quickly
♦ Trying to decelerate a large inertia load too quickly
♦ Application of shock load to motor
♦ Short circuit between motor phases
♦ Short circuit between motor phase and earth
♦ Motor output cables too long or too many parallel
motors connected to the drive
♦ Fixed or auto boost levels are set too high
HOT HEATSINK
The drive heatsink
temperature is too high
♦ The ambient air temperature is too high
♦ Poor ventilation or spacing between drives
ET EXTERNAL TRIP
User trip caused via control
terminals
♦ +24V not present on external trip (terminal X15/05)
♦ Check setting of EXT TRIP MODE parameter
IN 1 INPUT 1 BREAK I/O TRIPS:: INPUT 1
BREAK has gone True
♦ Check configuration to determine source of signal
IN 2 INPUT 2 BREAK I/O TRIPS:: INPUT 2
BREAK has gone True
♦ Check configuration to determine source of signal
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A
B
C
D
E
890CS Common Bus Supply - Frames B & D; 890CD Common Bus Drive and 890SD Standalone Drive - Frames B, C & D Page
10-5
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