11-11
11-4 Troubleshooting
OMNUC G5-SERIES AC SERVOMOTOR AND SERVO DRIVE USER'S MANUAL
11
Troubleshooting and Maintenance
12 0 Overvoltage
The power supply voltage exceeded
the allowable input voltage range,
causing the voltage between the
positive and negative terminals in the
converter to exceed the specified
value. The power supply voltage is
high. The voltage was suddenly
increased by the phase advance
capacitor or the uninterruptible power
supply (UPS).
100-V models: Approx. 200 VDC
(approx. 140 VAC)
200-V models: Approx. 400 VDC
(approx. 280 VAC)
400-V models: Approx. 800 VDC
(approx. 560 VAC)
· The regeneration resistor wiring is
broken.
· The External Regeneration
Resistor is inappropriate and
cannot absorb all of the
regenerative energy. The load
inertia is too large, gravitational
torque on the vertical axis is too
large, or there is some other
problem in absorbing the
regenerative energy.
· The Servo Drive has failed (circuit
failure).
Measure the voltage between the L1,
L2, and L3 lines on the connector and
the terminal block. Input the correct
voltage. Remove the phase advance
capacitor.
· Use a tester to measure the
resistance of the external resistor
between the B1 and B2 terminals
on the Servo Drive. If the
resistance is infinite, the wiring is
broken. Replace the External
Regeneration Resistor.
· Change the regeneration
resistance and wattage to the
specified values. (Calculate the
regenerative energy and connect
an External Regeneration
Resistor with the required
regeneration absorption capacity.
Reduce the descent speed.)
· Replace the Servo Drive.
Alarm
number
Name Cause Measures
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