Cause : Temperature in the line filter too high comes when the temperature monitoring in the line filter has responded. If the temperature remains too high during the complete monitoring time, this results in fault F06261.

• check whether the line filter type set in p0220[0] matches the line filter that is actually connected.
• Ensure that the line filter specified for the infeed being used is connected or correct the setting of the line filter type in p0220[0].
  - temperature monitoring is mandatory for AIM line filters (refer to p0220). Ensure that the line filter temperature  switch is correctly and reliably connected to input X21 of the infeed.
  - reduce the ambient temperature of the line filter.
  - reduce the load on the infeed and the filter module.
  - check the magnitude of the line supply voltage.
  - the internal fan of the filter module is defective. Replace the fan if necessary.
  - defective temperature switch of the filter module. Replace the filter module if necessary.