Pump will not operate.

  • Refill and prime the pump.
  • Clean the hose or gun.
  • Disassemble and clean the pump (see the lower manual). 
  • In the future, stop the pump at the bottom of the stroke. 
  • Keep the wet-cup filled with compatible solvent.
  • Repair or replace the driver. 
  • Remove the lower from the driver. 
  • If the driver will not cycle and does not blink an error code, then troubleshoot the driver or replace.