5-11
Display CountermeasuresCause of errorStatus when error
occurs
Error
Main-circuit power
supply setting error*
Occurs when the
main circuit power
supply is turned ON.
The setting of
Pn001.2 (AC/DC in-
put selection) and
the AC/DC wiring
method of the main
circuit power supply
are not the same.
Correct the setting of
Pn001.2.
Correct the wiring.
Servo Driver is
faulty.
Replace the Servo Driver.
Overvoltage
Occurs when power
supply is turned ON.
Main circuit power
supply voltage is
outside tolerance
range.
Change the main circuit
power supply voltage to
within tolerance range.
Occurs when Servo-
motor is decelerat-
ing.
Load inertia is too
great.
Deceleration time is too
long.
Calculate the regenera-
tive energy, and connect
an external Regeneration
Resistor with the required
regeneration absorption
capacity.
Main circuit power
supply voltage ex-
ceeds tolerance
range.
Reduce main circuit pow-
er supply voltage to with-
in tolerance range.
Occurs during de-
scent (vertical axis)
Gravitational torque
is too large.
Add a counterbalance to
the machinery to lower
gravitational torque.
Slow the descent speed.
Calculate the regenera-
tive energy, and connect
and external Regenera-
tion Resistor with the re-
quired regeneration ab-
sorption capacity.
Low voltage
Occurs when the
control circuit power
supply only is turned
ON.
Control panel error Replace the Servo Driver.
Occurs when the
main circuit power
supply is turned ON.
Main circuit power
supply voltage is
outside tolerance
range.
Change the main circuit
power supply voltage to
within tolerance range.
Main circuit power
supply is damaged.
Replace the Servo Driver.
Troubleshooting Chapter 5
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