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Protective Functions
Protection
*
Overcurrent
error
* Overheat
error
Alarm
Code No.
14
15
Cause
The current flowing in the converter is larger
than the specified value.
1) The driver failed (due to defective circuits
or IGBT parts).
2) Motor wires (U, V and W) are shorted.
3) Motor wires (U, V and W) are grounded.
4) Motor burned
5) Poor connection of Motor wires
6) The relay for the dynamic brake is melted
and stuck due to the fre quent Servo-ON/
OFF.
7) The motor is not compatible with the
driver.
The radiator is heated up to exceed the limit
temperature. The power elements of the
driver is overheated.
Overload.
Countermeasures
1) Disconnect the motor wires, and enter
Servo-ON. If this trouble hap-pens im-
mediately, replace the driver with a new
one (that is working correctly).
2) Check if the U. V and W wires are
shorted at the connections. Recon nect
them, if necessary.
3) Measure the insulation resistance be-
tween U/V/W and earth wire. If the re-
sistance is not correct, replace the mo-
tor with a new one.
4) Measure the resistance between U,V and
W. If they are unbalanced, replace the
motor with a new one.
5) Check if the U/V/W connector pins are
firmly secured with screws. Loosened
pins should be fixed firmly.
6) Replace the driver with a new one. Do
not start or stop the motor by entering
Servo-ON or OFF.
7) Check the capacity of the motor and
driver on the nameplate. If the motor is
not compatible with the driver, replace it
with a correct one.
Check the ambient temperature and cool-
ing conditions. Check the load rate. Make
the environment under
which the driver operates. Reduce the load.
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