07/04 AWB8230-1540GB
185
7 Troubleshooting
Fault Condition Possible cause Remedy
The motor does not
start.
There is no voltage
present at outputs U,
V and W.
Is voltage applied to terminals L, N and/or L1, L2
and L3?If yes, is the ON lamp lit?
Check terminals L1, L2, L3 and U, V, W. Switch
on the supply voltage.
Is the LED display on the keypad showing a fault
message (
E ……)?
Analyze the cause of the fault message
(a section “Fault messages”, page 119).
Acknowledge the fault message with the reset
command (for example by pressing the Stop key).
Has a start signal been issued? Issue the start signal with the START key or
through the FWD/REV input.
Has a reference frequency been entered under
PNU F001 (for control through operator panel
only)?
Enter a reference frequency under PNU F001.
Are the reference inputs through the
potentiometer correctly wired to terminals H, O
and L?
Check that the potentiometer is connected
correctly.
Are inputs O and OI connected correctly for
external reference input?
Check that the reference signal is correctly
connected.
Are the digital inputs configured as RST or FRS
still active?
Deactivate RST and/or FRS.
Check the signal on digital input 5 (default
setting: RST).
Has the correct source for the reference frequency
(PNU A001) been set?
Has the correct source for the start signal
(PNU A002) been set?
Correct PNU A001 accordingly.
Correct PNU A002 accordingly.
There is voltage
present at outputs U,
V and W.
Is the motor blocked or is the motor load too
high?
Reduce the load acting on the motor. Test the
motor without load.
The motor turns in
the wrong direction.
–
Are output terminals U, V and W correctly
connected? Does the connection of terminals U, V
and W correspond with the direction of rotation
of the motor?
Connect output terminals U, V and W correctly to
the motor according to the required direction of
motor rotation (generally the sequence U, V, W
causes clockwise operation).
Are the control signal terminals correctly wired? Control signal terminal FW(D) for clockwise
operation and REV for anticlockwise operation.
Has PNU F004 been correctly configured? Set the desired direction of rotation under
PNU F04.
The motor will not
start.
– No reference value is applied to terminal O or OI. Check the potentiometer or the external
reference value generator and replace if
necessary.
Is a fixed frequency accessed? Observe the sequence of priority: the fixed
frequencies always have priority over inputs O
and OI.
Is the motor load too high? Reduce the motor load as the overload limit will
prevent the motor reaching its normal speed if
there is an overload.
The motor does not
operate smoothly.
–
Are the load changes on the motor too high? Select a frequency inverter and motor with a
higher performance.
Reduce the level of load changes.
Do resonant frequencies occur on the motor? Mask these frequencies with the frequency jumps
(PNU A063 to A068) or change the pulse
frequency (PNU b083).
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