ProMix: PD2K, PD2K Auto
DKD4 : Position Failed Pump
Not enough air is supplied to the dosing valves
Ensure that at least 85 PSI is being supplied to the dosing valves.
The pressure at the pump outlet is too high
Check for an obstruction downstream of the pump that would increase pressure. Ensure the feed pressure is within 1/2 – 1/3 of the target pressure.