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What does the fault 4005 and 4007 means?

The troubleshooting guide and the manual has two faults for the same issue
Product Line:
AIC cabinet FAN is blocked or not working correctly.  The troubleshooting guide does not get updated often as the manual
These instructions are intended for use by authorized service personnel who have training, knowledge, and experience in:
• Installing electrical equipment and PV power systems (up to 1000 V)
• Applying all applicable installation codes
• Analyzing and reducing the hazards involved in performing electrical work
• Selecting and using personal protective equipment
Perform LOTO to make sure all energy in the inverter is zero.  
  1. After the inverter is safe to work, open the second and third door (counting from left to right) and remove upper sheet metal cover.
  2. You will see three fans on the top. Try to spin the fan manually and see which one does not spin freely.
  3. Verify connections on the back of the fans are secure.
  4. Once determined which fan or fans having an issue, call 866-519-1470 option 3 & 3 to open a new case.
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