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Error Code - 3 EXT Fan Err.

Definition: Cooling fan failure by visual check

Possible Causes:

  1. Fan is blocked
  2. Fan service life has expired
  3. Fan socket connector 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 work power supply and then reboot the system
  4. Contact after-sales service personnel

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