Omron R88D-GT series

8-8
8-3 Troubleshooting
8
Troubleshooting
14 Overcurrent
Occurs when the Servo
Drive is turned ON.
• Control PCB error • Replace the Servo
Drive.
• Servomotor power line
is short-circuited or
ground-faulted
between phases.
• Repair the short-cir-
cuited or ground-fault-
ed wire.
• Measure the
insulation resistance
at the Servomotor
and, if there is a short-
circuit, replace the
Servomotor.
• Miswiring between
phase U, phase V,
phase W, and ground.
• Correct the wiring.
• Servomotor winding is
burned out.
• Measure the winding
resistance, and if the
winding is burned out,
replace the Servomo-
tor.
• The relay for the
dynamic brake has
been consequently
welded.
• Do not frequently input
the RUN Command
Input.
• Do not operate the
system by turning the
servo ON and OFF.
• Servomotor
non-conformity
• Use a Servomotor that
is appropriate for use
with the Servo Drive.
• The pulse input timing
is too fast.
• Wait 100 ms min.
before inputting
pulses after turning
ON the RUN
Command Input
(RUN).
• The resistor in the
Servo Drive is
abnormally
overheating.
• Reduce the ambient
temperature of the
Servo Drive to 55°C or
lower.
• If the relay doesn’t
click when the power
supply is turned ON,
replace the Servo
Drive.
• The resistance of the
connected External
Regeneration Resistor
is less than the mini-
mum allowable value.
(For the minimum al-
lowable value, refer to
page 4-48.)
• Connect an External
Regeneration Resistor
whose resistance is
more than the mini-
mum allowable value.
For the available com-
binations of External
Regeneration Resis-
tors and resistance
values, refer to page
4-51.
Alarm
code
Error Status when error occurs Cause Countermeasure