AOD Pump Troubleshooting Guide

Pump Does not Start

Lack of Air

Check air circuit, valves and connections

Insufficient Air Pressure

Adjust Pressure. Check consumption of pump against other devices on   the same air line

Insufficient Air Flow Rate

Check piping size, connections, and consumptions against other devices   on the same air line

Damaged Control Valve

Check and replace if necessary

Pump intake or Delivery Closed

Disconnect Suction and Delivery hoses and see if pump starts

Pneumatic Exchanger Damaged / Broken

Replace exchanger. Check for presence of ice in air discharge. Clear ice   and retry

Broken Diaphragm

Check for air leaking through pump discharge pipe

Pump Stalled

Reset Pump by following commissioning procedure to check inlet and   outlet pipework, installation of the valves and three-way valves

Pump not Delivering Fluid

Balls Not Seating

Disassemble manifolds, clean seats or replace balls and seats

Suction too high

Reduce Suction Height

Viscosity of Fluid too high

Increase pipe diameter on intake. Decrease pump cycles. The diaphragms   on a pump are like a pair of lungs. By working too quickly with viscous   fluids they do not fill and consequently deliver fluid

Suction Blocked

Check and remove blockage

Pump Cycles Slow

Fluid is Too viscous

Increase pump size, increase pipe diameter

Suction / Delivery hose blocked

Check and clean

Pump Operation is erratic

Pneumatic Air Valve is worn

Replace

Shaft is worn

Replace

Ice on discharge

Check all air control devices and any snap on couplings

Internal Exchanger Fouled

Clean

Pump Stalls

Intake Blocked

Check hose does not kink. Clear blockage. Replace if necessary

Air dirty or contaminated with oil or condensation

Check pressure using pressure gauge on pump during operation. If   pressure is low compared to supply pressure recheck all fittings. In 90% of   cases all stalls are caused by snap on fittings

Faulty Distributor

Replace

Correct stopping procedure to pump not applied

Ensure correct pump stopping procedure is followed

Low Pump Flow Rate

Intake hose not connected correctly

Check

Blocked Pipe

Check and clean

Fluid is too viscous

Install larger diameter pipes, run pump slower, increase pump size

Balls Not Seating

Disassemble manifolds and clean seats and balls

Insufficient Air Flow

Check pressure using pressure gauge on pump during operation. If   pressure is low compared to supply pressure recheck all fittings. In 90% of   cases all stalls are caused by snap on fittings