Converter Main Power Supply Open Phase

What does SP0004 mean?

An open phase condition is detected in the main power supply to the converter unit of the spindle amplifier. This indicates a loss of one or more phases in the AC input.

• Failure of one or more phases in the incoming AC power supply.
• Loose connections at the main power input terminals of the amplifier.
• Faulty internal power factor correction (PFC) circuit.
• Blown input fuse or circuit breaker for the converter.
• Overheating of the converter power components.

Click steps to track your progress.

1. 1

   Measure the AC input voltages (L1, L2, L3) at the amplifier's power terminals.

2. 2

   Inspect all power input connections for signs of arcing or corrosion.

3. 3

   Verify the main circuit breaker supplying power to the amplifier is not tripped.

4. 4

   Check the status of any internal input fuses within the amplifier.

5. 5

   Ensure the amplifier is operating within its specified ambient temperature range.