Omron R88D-KN series User Manual page 382

12 Troubleshooting and Maintenance
Error No. (hex)
Name
Main Sub
13 0 Main Circuit
Power Supply
Undervoltage
(Undervoltage
between
positive and
negative
terminals)
1 Main Power
Supply
Undervoltage
(AC
interruption
detected)
14 0 Overcurrent
1 IPM Error
12-12
Cause
If the Undervoltage Error Selection
(3508 hex) is set to 1, a momentary power
interruption occurred between L1 and L3 for
longer than the value specified for the
Momentary Hold Time (3509 hex).
Alternatively, the voltage between the
positive and negative terminals in the main
power supply converter dropped below the
specified value while the servo was ON.
• The power supply voltage is low.
• A momentary power interruption occurred.
• Insufficient power supply capacity: the
power supply voltage dropped because
there was inrush current when the main
power supply was turned ON.
• Phase-failure: a Servo Drive with 3-phase
input specifications was operated with
single-phase power supply.
• The Servo Drive is faulty (circuit fault).
The current flowing through the converter
exceeded the specified value.
• The Servo Drive is faulty (faulty circuit,
faulty IGBT part, etc.).
• The motor cable is short-circuited between
phases U, V, and W.
• The motor cable is ground-faulted.
• Motor windings are burned out.
• The motor wiring contacts are faulty.
• The relay for the dynamic brake has been
welded due to frequent servo ON/OFF
operations.
• The motor 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.
G5 Series AC Servo Drives With Built-in EtherCAT Communications, Linear Motor Type
Measures
Measure the voltage between the connector
(L1, L2, and L3) lines.
• Increase the power supply voltage.
Change the power supply. Eliminate the
cause of the failure of the electromagnetic
contactor on the main circuit power supply,
and then turn ON the power again.
• Check the setting of the Momentary Hold
Time (3509 hex). Set each phase of the
power supply correctly.
• Increase the power supply capacity. Refer
to 2-3-1 Servo Drive Model Table on page
2-5 for information on the power supply
capacity.
• Connect each phase (L1, L2, and L3) of
the power supply correctly. Use L1 and L3
for single-phase 100 V and single-phase
200 V.
• Replace the Servo Drive.
• Disconnect the motor cable, and turn ON
the servo. If the problem immediately
recurs, replace the Servo Drive with a new
one.
• Check to see if the motor cable is short-
circuited between phases U, V and W by
checking for loose wire strands on the
connector lead. Connect the motor cable
correctly.
• Check the insulation resistance between
phases U, V, and W of the motor cable and
the grounding wire of the motor. If the
insulation is faulty, replace the motor.
• Check the balance between the resistance
of each wire of the motor. If resistance is
unbalanced, replace the motor.
• Check for missing connector pins in motor
connections U, V, and W. If any loose or
missing connector pins are found, secure
them firmly.
• Replace the Servo Drive. Do not start or
stop the system by turning the servo ON or
OFF.
• Check model (capacity) of the motor and
the Servo Drive on the nameplates.
Replace the motor with a motor 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.