Exhaust fan cannot extract smoke or dust
Reasons:
 
1. Exhaust fan break down
Solution:
there’s a common way to connect it to the power directly using the power cable of chiller, then check if exhaust fan can be turn on normally. See below.
  
 
2. Connect the fan inlet and outlet in opposite directions
 
 
Solution:
Please check if the exhaust fan install incorrectly.
3. Exhaust channel are blocked
 
 
Solution:
Clean them to make sure the the exhaust channel is in good condition.
 
End
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