Sanyo Denki Sanmotion R 3E S, Instruction Manual, Page: 354 / 514

8. Maintenance
8-21
■
Alarm Code 71 (Control Power Supply Under-voltage)
 Corrective actions
■
Alarm Code 72 (Control Circuit voltage reduction 1)
 Corrective actions
■
Alarm Code 73 (Control Circuit voltage reduction 2)
 Corrective actions
Status at the time of alarm
Cause
1 2 3
Issued when control power is turned ON.
✔ ✔
Issued during operation. ✔ ✔
Cause Investigation and corrective actions
1
■
Defect in internal circuit of servo
amplifier.
■
Replace the servo amplifier.
2
■
Input power supply voltage is below
the specified range.
■
Confirm that the power supply is
set within the specified range.
3
■
Input power supply voltage is
fluctuating or having phase loss.
■
Confirm power supply to avoid
phase loss or voltage reduction.
Status at the time of alarm
Cause
1 2
Issued when control power is turned ON.
✔ ✔
Cause Investigation and corrective actions
1
■
Defect in internal circuit of servo
amplifier.
■
Replace the servo amplifier.
2
■
Defect in external circuit.
■
Restart the power supply after
removing the connector: CN1.
Check the external circuit if alarm is
not issued.
Status at the time of alarm
Cause
1 2
Issued when control power is turned ON. ✔ ✔
Cause Investigation and corrective actions
1
■
Defect in internal circuit of servo
amplifier.
■
Replace the servo amplifier.
2
■
Defect in external circuit.
■
Restart the power supply after
removing the connector: CN1.
Check the external circuit if alarm is
not issued.
■
Restart the power supply after
replacing the servo motor; if alarm
is not issued, there is defect in
internal circuit of motor encoder.
Replace the servo motor.