A 1. The nozzle is not tightened or notinstalled.
2. The needle seal kit is loose
3. The connecting nut of the spray gunisloose(thelowerpotspraygun)
4. The paint in the potis insufficient
5. The nozzle setis damaged
Countermeasures:
1. Tighten the nozzle or clean and install the nozzle set
2. Fastening thimble seal kit
3. Tighten the connection nut
4. Supplementary paint
5. Replace the nozzle set