List of LED errors

Fault

Possible cause

Measure

On each module:

  • RUN LED is off
  • MF LED lights up
    sporadically
  • Electronics power supply:
    The maximum current for the electronics power supply has been exceeded.
  • Install a power module.

On one or
several modules:

  • RUN LED is off
  • MF LED flashes
  • Configuration error:
    At this point a module has been installed that does not correspond to the module currently configured.
  • Align
    configuration and
    hardware structure with each other.

On all modules up to the
faulty module:

  • All RUN LEDs up to the
    faulty module are flashing

On all subsequent
modules:

  • RUN LED is off
  • MF LED lights up
  • Module failure:
    The module to the right of the flashing modules is defective.
  • Replace the defective module.