Alarm of Power Supply (ECM)

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A general alarm condition has occurred within the power supply unit of the Energy Charge Module (ECM). This indicates a problem with the main power input to the ECM or its internal power conversion circuitry.

• Power supply unit (ECM) internal fault or failure.
• Overcurrent condition detected in the ECM power stage.
• Short circuit in the connected load to the ECM.
• Voltage instability from the main power source affecting ECM.

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1. 1

   Immediately stop the machine using the emergency stop button and open the external Main Circuit Contactor (MCC) of the Power supply.

2. 2

   Check the incoming main power supply voltage and frequency to the αi PS or power supply module; ensure it is within the specified range (e.g., 200-240 VAC for 200V series, 400-480 VAC for 400V series).

3. 3

   Inspect the circuit breakers and magnetic contactors connected to the power supply for tripping or damage (Section 3.1.3.10, page 95).

4. 4

   Verify that the power supply wiring (Cable K1, Section 9.3.1.1, page 213) is securely connected and has the correct cross-sectional area.

5. 5

   If an external power transformer is used, check its input and output voltages for correctness and stability (Section 3.1.3.7, page 89).