Omron R88M-K User Manual page 526

12 Troubleshooting and Maintenance
Error No. (hex)
Name
Main Sub
14 0 Overcurrent
1 IPM Error
15 0 Servo Drive
Overheat
12-16
Cause
The current flowing through the converter
exceeded the specified value.
• The Servo Drive is faulty (faulty circuit,
faulty IGBT part, etc.).
• The Servomotor cable is short-circuited
between phases U, V, and W.
• The Servomotor cable is ground-faulted.
• Motor windings are burned out.
• The Servomotor wiring contacts are faulty.
• The relay for the dynamic brake has been
welded due to frequent servo ON/OFF
operations.
• The Servomotor is not suitable for the
Servo Drive.
• The command input timing is the same as
or earlier than the Servo ON timing.
• The resistance of the connected External
Regeneration Resistor is less than the
minimum allowable value.
The temperature of the Servo Drive radiator
or power elements exceeded the specified
value.
• The ambient temperature of the Servo
Drive exceeded the specified value.
• Overload
G5-series AC Servomotors and Servo Drives User's Manual (with Built-in EtherCAT Communications)
Measures
• Disconnect the Servomotor cable, and turn
ON the servo. If the problem immediately
recurs, replace the Servo Drive with a new
one.
• Check to see if the Servomotor cable is
short-circuited between phases U, V and
W by checking for loose wire strands on
the connector lead. Connect the
Servomotor cable correctly.
• Check the insulation resistance between
phases U, V, and W of the Servomotor
cable and the grounding wire of the
Servomotor. If the insulation is faulty,
replace the Servomotor.
• Check the balance between the resistance
of each wire of the Servomotor. If
resistance is unbalanced, replace the
Servomotor.
• Check for missing connector pins in
Servomotor connections U, V, and W. If
any loose or missing connector pins are
found, secure them firmly.
• Replace the Servo Drive.Do not turn the
servo ON for 3 minutes after using the
dynamic brake.
• Check model (capacity) of the Servomotor
and the Servo Drive on the nameplates.
Replace the Servomotor with a
Servomotor that matches the Servo Drive.
• Wait at least 100 ms after the servo has
been turned ON, then input commands.
• Connect an External Regeneration
Resistor whose resistance is more than
the minimum allowable value.
• Improve the ambient temperature and the
cooling conditions of the Servo Drive.
• Increase the capacities of the Servo Drive
and the Servomotor. Set longer
acceleration and deceleration times.
Reduce the load.