Mitsubishi FDUM60VF - Panasonic inverter fan crazy noise

Hi all

One of my FDU units is doing this crazy noise after 5 years of the installation. The technician told me that the inverter fan needs replacement and cost is around 500-600 euro!! Can I do any DIY to lubricate the bearings or replace them ? The cost is unacceptable, is 1/3 of the unit, it will cost me less to buy a new one.

Model: FDUM60VF

Production year: 2016

Ducted indoor unit (DX)

Fan motor: SSA512T109C

https://www.youtube.com/shorts/oRIwB8m_NyU