5-10
Display
Countermeasures
Cause of error
Status when error
occurs
Error
Overcurrent
Occurs when power
supply is turned ON.
Control panel error
Main circuit transis-
tor module error
Replace the Servo Driver.
Occurs when servo
is turned ON.
Current feedback
circuit error
Main circuit transis-
tor module error
Replace the Servo Driver.
Servomotor power
line is short-circuited
or grounded be-
tween phases.
Repair the short-circuited
or grounded wire.
Measure the insulation
resistance at the Servo-
motor and, if there is a
short-circuit, replace the
Servomotor.
Miswiring between
U-phase, V-phase,
W-phase, and
ground.
Correct the wiring.
Servomotor winding
is burned out.
Measure the winding re-
sistance, and if the wind-
ing is burned out, replace
the Servomotor.
Ambient Servo Driv-
er temperature ex-
ceeds 55
°
C.
Lower the Servo Driver’s
ambient temperature to
55
°
C or less.
Radiation shield air
convection is poor.
Mount according to
mounting conditions.
The fan has
stopped.
Replace the Servo Driver.
Operating above
rated output.
Lighten the load.
Regeneration error
Occurs during op-
eration.
Error in the regen-
erative circuit parts.
Replace the Servo Driver.
e a o
External Regenera-
tion Resistor is
burned out.
Replace the External Re-
generation Resistor.
Apart from a short-
circuit between B2
and B3, the external
circuit resistor is not
connected.
Correctly connect the ex-
ternal circuit resistor (be-
tween B1 and B2).
Regeneration over-
load
Occurs during op-
eration.
Regenerative ener-
gy exceeds toler-
ance.
Calculate the regenera-
tive energy, and connect
an external Regeneration
Resistor with the required
regeneration absorption
capacity.
Setting error in
Pn600 (regeneration
resistor capacity)
Set Pn600 correctly.
Troubleshooting
Chapter 5
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