Trips and Fault Finding
7-2
650V AC Drive
ID
Trip Name
Possible Reason for Trip
3 OVERCURRENT
The motor current being drawn from the drive is too high:
Trying to accelerate a large inertia load too quickly;
ACCEL TIME time too short
Trying to decelerate a large inertia load too quickly;
DECEL TIME time too short
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 BOOST level set too high
4 HEATSINK
Drive heatsink temperature > 100ºC:
The ambient air temperature is too high
Poor ventilation or spacing between drives
5 EXTERNAL TRIP
The external trip input is high:
Check configuration to identify the source of the signal
(non-standard configuration)
6 INVERSE TIME
A prolonged overload condition, exceeding the Inverse Time
allowance, has caused the trip:
Remove the overload condition - refer to Chapter 5:
P
12
7 CURRENT LOOP
A current of less than 1mA is present when 4-20mA setpoint
is selected:
Look for a wire break
8 MOTOR STALLED
The motor has stalled (not rotating) Drive in current limit
>200 seconds:
Motor loading too great
FIXED BOOST level set too high
9 ANIN FAULT
AIN2 overload on terminal 3:
Overcurrent applied in Current mode to terminal 3
10 BRAKE RESISTOR
External dynamic brake resistor has been overloaded:
Trying to decelerate a large inertia too quickly or too
often
11 BRAKE SWITCH
Internal dynamic braking switch has been overloaded:
Trying to decelerate a large inertia too quickly or too
often
12 DISPLAY/KEYPAD
Keypad has been disconnected from drive whilst drive is
running in Local Control:
Keypad accidentally disconnected from drive (indicated
over Comms, or by second keypad)
13 LOST COMMS
Lost communications:
COMMS TIMEOUT parameter set too short
Master device failed
Wiring broken
Incorrect Comms setup
