Rockwell Automation 161 SERIES A - Manual (Page 31)

Bulletin 161
25
7. Faults and troubleshooting
Fault Possible cause Corrective action
Is there mains voltage at the input
terminals L1, N?
If so, is the LED display lit? Check connections L1, N and U/T1,
V/T2, W/T3. Switch on the mains
voltage.
Is there a fault indication on the
display? Analyze the cause of the fault indication.
Cancel the fault indication with the Reset
function.
Has a start command been issued
using the RUN key or via the input
[FW], [RV]? Press the RUN key or issue the start
command at the relevant input.
Has a frequency command been
entered using the control panel? Enter the frequency command under
F01 .
If the frequency command has been
specified via a potentiometer, are the
terminals H, O and L wired correctly? If
the command has been specified
externally, are inputs O or OI properly
connected? Check that the potentiometer is properly
connected.
Check that the cable for the frequency
command signal is properly connected.
Is the controller lock [FRS] active? Is the input programmed as [FRS]?
The motor
does not
start.
Has a reset signal been issued? Check the signal at input 5 (factory
default [RS]).
There is no
voltage at
terminals
U/T1, V/T2,
W/T3.
Has the drive been programmed under
parameter
A01 and A02 in accordance
with the frequency command setting
and the start command?
Check the setting under parameter A01
and A02 .
Voltage is
applied to
terminals
U/T1, V/T2,
W/T3 Is the motor blocked or is the load too
high? Check the motor and the load. For test
purposes run the motor without a load.
Are the terminals U/T1, V/T2, W/T3
connected properly? Is the connection
of the terminals U/T1, V/T2, W/T3 set
up properly for the direction of rotation
of the motor? Correct the wiring of the motor. The
direction of
rotation of
the motor is
incorrect.
Have the control inputs been wired
correctly? [FW] – Forward
[RV] – Reverse
A frequency command has not been
applied to terminal O or OI. Check the potentiometer or external
frequency command generator and if
necessary, replace it.
Has a Preset Frequency been
selected? Observe the priority sequence;
Preset Frequency have priority over the
inputs O and OI.
The motor
does not
accelerate.
Is the motor load too high? Reduce the motor load. If the load is too
high the overload restriction function
prevents the motor from accelerating to
the commanded frequency.