6.3 amp fuses keep blowing in air assist unit

[Crakkers]

We have upgraded our fuses to 6.3 amp. BUT they keep blowing, so we have no air assist.

Any ideas on the problem / fix please?

Laser = VL300

Thanks

[bradders]

It sounds as though the compressor unit may be faulty, and electrician should be able to test it out for you