I have a Micornel U65HN product, and I am experiencing issues with the blower. The fan is not spinning freely when I try to turn it by hand. I have already performed an electrical check, and everything appears to be working normally on the electrical side. My assumption is that something is obstructing the blower fan or one of its internal components.
Could you please assist me by providing instructions on how to remove the fan from this blower? Or is the fan not designed to be removed? I am unsure how to start disassembling it, as I am concerned about possibly breaking or damaging the blower fan.
Here is my documentation :

