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Alarm - ExtFanErr

Definition: Cooling Fan Failure

Possible Cause: 

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


  1. Observe for 5 minutes to see whether the alarm will be eliminated automatically
  2. Check for foreign objects on fan blades
  3. Switch off external AC disconnect, then back on to reboot the system
  4. Contact post-sales service if not corrected.

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