Emotron AB 01-3991-11r2 Troubleshooting and maintenance 65
General functional troubleshooting
Ta bl e 3 0
Status Checking point Corrective Action
Motor does
not run
Is power applied to L1, L2,
and L3 terminals (is the
charging indicator lit)?
Is the power applied
Turn the power OFF and then ON again.
Make sure the input line voltage is correct.
Make sure all terminal screws are secured
firmly.
Are there voltage outputs on
T1, T2, and T3 terminals?
Turn the power OFF and then ON again.
Is the motor mechanically
overloaded?
Reduce the load to improve performance.
Are there any problems with
the VSD?
See error descriptions to check wiring and cor-
rect if necessary.
Has the forward or reverse
run commands been issued?
Is there an analogue input sig-
nal?
Is analogue frequency input signal wiring correct
Is frequency input voltage correct
Is operation mode setting cor-
rect?
Configure operations through the digital panel
Motor rotates
in the wrong
direction
Are wiring for output terminals
T1, T2, and T3 correct?
Wiring must match U, V, and W terminals of the
motor.
Are wiring for forward and
reverse signals correct?
Check wiring and correct if necessary.
Motor rotates
in the wrong
direction.
The motor
speed can
not vary
Are wiring for output terminals
T1, T2, and T3 correct?
Check wiring and correct if necessary.
Is the setting of frequency
command source correct?
Check the operation mode setting on the key-
pad.
Is the load too large? Reduce the load.
Motor run-
ning at too
high or too
low speeds.
Is the setting of operation
mode correct?
Confirm the motor's specifications.
Is the load too large? Confirm the gear ratio.
Are specifications of the
motor (poles, voltage…) cor-
rect?
Confirm the highest output frequency.
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