Rockwell Automation 161 SERIES A - Manual (Page 28)

Bulletin 161
22
6. Fault indications
The Bulletin 161 drives are provided with protective devices such as protection against excessive current,
excessive voltage and under-voltage. When one of the many protection functions is triggered the output voltage
will be switched off – the motor will freewheel and the device will remain in the fault indication mode until the
fault indication has been cleared.
Fault
indication
Description Cause Corrective action
Is the motor rated current larger
than the drive rated current? Select drive with a higher rating.
Did a sudden load increase
occur or is the motor blocked? Avoid sudden overloads.
Possibly use drive and motor with
higher rating.
Overcurrent
•
during running
Are the motor terminals U/T1,
V/T2, W/T3 short-circuited? Check motor lines and the motor for a
short circuit.
Is the deceleration time setting
too short? Set a longer deceleration time.
•
during deceleration
Are the motor terminals U/T1,
V/T2, W/T3 short-circuited? Check motor lines and the motor for a
short circuit
Is the acceleration time setting
too short? Increase the acceleration time
Are the motor terminals short-
circuited? Check motor lines and the motor for a
short circuit
Is the manual boost (parameter
A42 ) set too high?
Reduce the boost under parameter
A42
•
during acceleration
Is the motor blocked? Check the motor load or breakaway
torque
•
at a standstill Is there an earth fault at the
output terminals or at the motor? Check the output lines or the motor for
an earth fault
Triggering of internal
motor protection The internal electronic motor
protection has been triggered
due to overloading of the
connected motor. Use a motor and converter with a
higher rating
Check the entry under parameter b12
The drive is overloaded The output current is greater
than the drive rated current
Use drive with a higher rating
Set a longer deceleration time.
Inactivate the AVR function for
deceleration (parameter
A81 , enter 01
or 02).
Enter a higher motor voltage under
parameter
A82 .
DC-bus overvoltage The motor was operated
oversynchronously
(regenerative).
Use the brake chopper.
EEPROM error Is the temperature too high or is
the drive exposed to electric
noise? Check the environmental conditions.
Re-enter the programmed
parameters.
E 04
E 05
E 08
E 07
E 03
E 01
E 02