Inverter Control Power Supply Undervoltage

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This alarm indicates an undervoltage condition in the control power supply of the Inverter (Servo Amplifier). This can be caused by low three-phase input voltage, insufficient 24V power supply from the Power Supply, or issues with the CXA2A/B connector and cable.

• Three-phase input voltage of the amplifier lower than 85% of its rated input voltage.
• 24V power supply voltage output from the Power Supply lower than 22.8V.
• Faulty connector or cable (CXA2A/B).

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1. 1

   Check the three-phase input voltage of the amplifier — ensure it is not lower than 85% of the rated input voltage.

2. 2

   Check the 24V power supply voltage output from the Power Supply — ensure it is not lower than 22.8V.

3. 3

   Check the connector and cable (CXA2A/B) for proper connection and integrity.

4. 4

   Replace the Servo Amplifier if voltage and cable checks are satisfactory.