NSK EDD Megatorque Motor - Alarm P2: Motor over Current; Alarm P3: Control Power under Voltage

11. Alarm and Warning
— 11-22 —
11.3.24. Alarm P2: Motor Over Current
 The Driver Unit watches the current that flows through the Motor.
The Driver Unit gives this alarm when the current to the Motor exceeds the capacity.
Table 11-33: Cause and remedy for the alarm P2
Cause
Remedy
(1)
Wrong combination of the Motor and the
Driver Unit
 Confirm if the combination of the Motor and the Driver Unit is right.
(2)
Poor insulation of the Motor cable
 Visually check for the damage on the cable cover.
 Check the Motor and the Cable referring to “Appendix 2: How to Check
Motor Condition” and replace them if necessary.
(3)
Poor insulation of the Motor
(4)
Defective Driver Unit
 If the above measures do not work, the Driver Unit may be defective.
Replace it referring to “Appendix 5: Procedure for Replacing Driver Unit
Model EDD”.
11.3.25. Alarm P3: Control Power Under Voltage
 The Driver Unit watches the voltage of control power supply. It gives the alarm when the voltage falls
below the threshold.
Table 11-34: Cause and remedy for the alarm P3
Cause
Remedy
(1)
The voltage of control power supply
falls below 60 [VAC].
 Turn off the power supply. Fasten the screws for the power cable connectors
and the power supply terminals.
 Confirm the voltage of control power supply.
(2)
Defective Driver Unit
 If above measures do not work, the Driver unit may be defective. Replace
it referring to “Appendix 5: Procedure for Replacing Driver Unit Model
EDD”.
(1) The EEPROM does not back up an input of the parameter setting while this alarm is being on. This is
because the voltage to control the CPU and the EEPROM, which are incorporated into the Driver Unit, is
below the specification.