Rockwell Automation 161 SERIES A - Manual (Page 29)

Bulletin 161
23
Fault
indication
Description Cause Corrective action
DC-bus undervoltage Brief voltage dips occur or the
mains voltage is reduced to 150-
160V Check the input voltage.
Possible influence of
electromagnetic fields on the
drive? Examine the environment of the drive
and external wiring for causes of the
fault (e.g. terminal bar). Processor error
Is the drive defective? Have the device serviced by customer
support.
External fault External fault indication at the
input [EXT] Remove the cause of the fault
indication in the external wiring.
Has the power supply been
switched on while the start lock
was active (input [USP])? Activate the start lock only when the
power supply has been switched on. Fault cause by
triggering of start lock
Has the mains voltage been
interrupted for a short period of
time during operation and while
the start lock was activated?
(input [USP]) Check the mains.
Earth fault at the motor
terminals Is there an earth fault between
U/T1, V/T2, W/T3 and earth? Remove the earth fault and check the
motor.
Excess mains voltage If the mains voltage is higher
than permitted (see "Technical
data"), the drive will be in fault
mode Check the mains voltage.
Is the drive overloaded? Check the motor current.
Is the ambient temperature too
high? Check the ambient temperature.
Drive overtemperature
fault
Are the assembly clearances too
small? (see chapter 3 Assembly) Check the assembly clearances.
Is the motor overloaded? Check the motor load. Control of the PTC
circuit breaker
triggering function
Is the self-ventilation of the
motor – particularly at low
speeds – not sufficient? Use an external fan if low speeds are
often used.
E 15
E 14
E 12
E 09
E 11
E 22
E 21
E 35
E 13