6-2 Trips and Fault Finding
690+ Series AC Drive
Using the Keypad to Manage Trips
Trip Messages
If the drive trips, then the display immediately shows a message indicating the reason for the
trip. The possible trip messages are given in the table below.
Trip Message and Meaning Possible Reason for Trip
OVERVOLTAGE
The drive internal dc link voltage is too
high
The supply voltage is too high
Trying to decelerate a large inertia load too quickly
The brake resistor is open circuit
UNDERVOLTAGE
The drive internal dc link voltage is too
low
The supply voltage is too low
The supply has been lost
A supply phase is missing
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
HEATSINK
The drive heatsink temperature is too
high
The ambient air temperature is too high
Poor ventilation or spacing between drives
EXTERNAL TRIP
User trip caused via control terminals +24V not present on external trip (e.g. terminal 19,
Macro 1).
INPUT 1 BREAK
A signal break has been detected on
analog input 1 (terminal 1)
Analog input is incorrectly configured for 4-20mA
operation
Break in external control wiring
INPUT 2 BREAK
A signal break has been detected on
analog input 2 (terminal 2)
Analog input is incorrectly configured for 4-20mA
operation
Break in external control wiring
MOTOR STALLED
The motor has stalled (not rotating) Motor loading too great
Current limit level is set too low
Stall trip duration is set too low
Fixed or auto boost levels are set too high
BRAKE RESISTOR
External dynamic braking resistor has
been overloaded
Trying to decelerate a large inertia load too quickly or
too often
BRAKE SWITCH
Internal dynamic braking switch has
been overloaded
Trying to decelerate a large inertia load too quickly or
too often
OP STATION
Keypad has been disconnected from
drive whilst drive is running in local
control
Keypad accidentally disconnected from drive
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