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11.3.25. 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 11-34: 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
(3) Poor insulation of the Motor
• 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.
(4) Defective Driver Unit
• If the above measures do not work, the Driver Unit may be
defective. Replace it referring to “Appendix 4: Procedure for
Replacing Driver Unit”.
11.3.26. 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 11-35: 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 4: Procedure for Replacing
Driver Unit”.
(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.
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