On Tue, 24 Mar 2020 16:44:02 +0000, Shamra
m wrote:

My numatic sometime working sometimes not working but power light is on..

Motor brushes?

Bags
and filters are looks fine.. Anyone help me what might be the problem?

Depending on your skill levels and access to a suitable screwdriver
and multimeter, you should be able to access the insides (with it
unplugged) and test for continuity up to the motor etc.

Cheers, T i m