Heidenhain codes
AxisMD

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Heidenhain Controller

Power Supply · Intermediate · 30-120 minutes

Alarm 231-8A10

HEIDENHAIN 231-8A10 - 8A10 AC fail

This TNC 640 error indicates a problem with the power supply system. The control has detected abnormal conditions in the mains power or DC-link voltage.

HeidenhainPower SupplyIntermediate30-120 minutes

231-8A10

HEIDENHAIN 231-8A10 - 8A10 AC fail

8A10 AC fail

This TNC 640 error indicates a problem with the power supply system. The control has detected abnormal conditions in the mains power or DC-link voltage.

Safety

  • Refer to Heidenhain service manual
  • Ensure qualified technician performs repairs

Common Causes

  • Power-on of the drive not possible, because an
  • At least one phase is missing at the

Troubleshooting Steps

  1. 1Note the full error text and the NC software number of the control.
  2. 2Contact your machine builder or HEIDENHAIN service.
  3. 3Check wiring and cable connections.
  4. 4Check power supply wiring and circuit breakers.

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Always verify with your machine manual or a certified technician before performing service procedures.