11-12
11-4 Troubleshooting
Accurax G5 AC SERVOMOTOR AND SERVO DRIVE USER'S MANUAL
11
Error and Maintenance
13
Main circuit power
supply undervoltage
Occurs when the servo is
turned ON.
· The power supply
voltage is low.
· Momentary power
interruption occurred.
· Power supply capacity
is insufficient.
·
The power supply voltage
is reduced because the
main power supply is OFF.
· The main power supply
is not input.
· Check the power
supply capacity.
· Change the power
supply.
· Turn ON the power
supply.
· Extend the Momentary
Hold Time (Pn509).
Occurs when the power
supply is turned ON.
· Phase loss
·
Correctly connect the phases
of the power supply voltage.
· Correctly connect the
single-phase.
· The main circuit power
supply is damaged.
· Control PCB damage.
· Replace the driver.
14 Overcurrent
Occurs when the servo is
turned ON.
· Control PCB error · Replace the driver.
· The motor power line is
short-circuited or
ground-faulted
between phases.
·
Repair the short-circuited or
ground-faulted power line.
·
Measure the insulation
resistance at the motor
and, if there is a short
circuit, replace the motor.
·
Phase U, phase V, phase
W, and the ground are
wired incorrectly.
· Wire correctly.
· Motor winding is
burned out.
· Measure the winding
resistance, and if the
winding is burned out,
replace the motor.
· The relay for the
dynamic brake has
been deposited.
· Do not frequently input
the operation
command (RUN) input.
· Do not operate the
system by turning the
servo ON and OFF.
· Motor non-conformity
· Use a motor that is
appropriate for use
with the driver.
· The pulse input timing
is too soon.
·
Wait at least 100 ms before
inputting pulses after
turning ON the operation
command (RUN).
· The resistor in the
driver is abnormally
overheating.
· Reduce the ambient
temperature of the
driver to 55°C or lower.
· If the relay does not
click when the power
supply is turned ON,
replace the driver.
Alarm
display
Error conditions
Status when error
occurs
Cause Measures
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