7-2 Trips and Fault Finding
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
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