12V Diaphragm Water Pump - PRP-125
9
Pump fails to turn ON after the discharge valves have been closed.
Possible Fault
Action
Liquid supply has been depleted
Ensure liquid is available for pumping.
Discharge line has a leak
Check outlet tubes and connections and ensure they are air-tight.
Debris in the check valves
Clean obstructed or jammed check valves.
Insufficient voltage to pump
Ensure input voltage is within specifications.
Ruptured pump diaphragm
Replace the pump diaphragm.
Defective pressure switch
Replace pressure switch.
Low Flow Rate and Pressure
Possible Fault
Action
Air leak at the pump intake
Check inlet tubes and connections and ensure they are air-tight.
Accumulation of debris inside the pump
Clean pump.
Insufficient voltage to the pump
Ensure input voltage is within specifications.
Punctured pump diaphragm
Replace the pump diaphragm.
Pump bearing is worn-out (excessive noise)
Replace bearing.
Defective rectifier or motor
Replace the rectifier or motor.
Intermittent Flow Rate
Possible Fault
Action
Restricted pump delivery
Check discharge lines, fittings, valves and spray nozzles for
obstructions or under sizing.
