11-16
11-4 Troubleshooting
OMNUC G5-Series AC Servo Drives Users Manual (Built-in MECHATROLINK-II communications type)
11
Error and Maintenance
14
0 Overcurrent
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.
• Disconnect the Servomotor cable,
and turn ON the servo. If the
problem immediately occurs,
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.
1 IPM error
15 0 Servo Drive overheat
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
• 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.
Alarm
number
Name Cause Measures
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