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VIII. Troubleshooting
Problem Cause
Remedy
Pump
does not
achieve or
maintain
prime
Air Trapped in suction
line
Foot Valve
contaminated or
improperly installed
Excessive lift
Suction fittings not
properly tightened
Worn or contaminated
check valves
Kink or pinch in
suction tube
Low chemical level
Straighten suction line so as to eliminate high
spots
Inspect foot valve screen and assure that foot
valve is in a vertical position below fluid level
Maximum suction lift is 5 feet with water or fluids
of similar specific gravity; less with heavier
liquids such as acids. Mount pump in a lower
position relative to the chemical container.
Check fittings. Over tightening may cause
restriction. Conversely, if
any
leakage occurs,
pump will suck air and fail to prime.
Inspect check valves in fluid end for cleanliness.
Clean or replace as necessary.
Inspect suction tube through its full length to
assure that there are no kinks or other
restrictions
Check fluid level in chemical supply tank
Insufficient
fluid
Obstruction in suction
line
Clogged foot valve
screen
Diaphragm worn or
torn
Electronic failure
Check suction line for obstructions, clogging,
kinks or pinch points
Clean or replace foot valve screen
Replace diaphragm, making sure that it is
screwed on fully to shoulder of shaft
Consult factory
Excessive
fluid
Failure of anti-siphon
valve
Improper stroke length
Inspect or add anti-siphon valve. This is caused
when system is in a vacuum condition.
Consult factory
Pump will
not run
Pump not turned on or
not plugged in
Electronic failure
Check outlet with meter to assure that 95-135
VAC is present on 120V systems and that the
power supply cord is in good condition and
plugged in
Consult dealer or factory
Summary of Contents for AI-5
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