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Alarm - ExtFanErr

Definition:  Cooling fan failure by visual check

Possible causes:

  1.  Fan is blocked
  2. Fan service life has expired
  3. Fan socket connecter has poor contact.


  1.   Observe for 5 minutes and see whether the alarm will be eliminated automatically;
  2.  Check for foreign objects on fan blades;
  3.  Switch off 3-phase power supply and then reboot the system;
  4.  Contact after-sales service personnel

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