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100A/104A - Fan drive overload

Alarm conditions:

100A - Supply fan drive (frequency inverter) overload (Lenze: F_AF fault). Too high temperature in frequency inverter circuit.

104A - Exhaust fan drive (frequency inverter) overload (Lenze: F_AF fault). Too high temperature in frequency inverter circuit.

Possible causes:

  1. Too high load on fan drive
  2. Fan drive failure

Troubleshooting:

 

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