airPUMP
AP025
(plastic)
www.sera-web.com
13
TROUBLESHOOTING TIPS AND SUGGESTIONS
PUMP WILL NOT START OR CYCLEL:
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Blocked liquid pipe or hose - Clean out or replace
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Clogged liquid chamber - Remove debris
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Diaphragm shaft bushing / o-ring leak - Replace o-rings
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Air valve carrier not shifting - Inspect, clean
ERRATIC CYCLING:
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Diaphragm failure - Replace diaphragm
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Valve ball not seating properly, worn or damaged – Inspect, remove debris or replace
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Leak in suction line - Inspect, repair or replace
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Diaphragm shaft / o-ring leak - Replace o-rings
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Air valve carrier not shifting - Inspect and clean
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Over lubrication in air valve - Inspect, degrease, clean, and reuse. Remove lubrication
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Excess moisture in air valve – Inspect, dry, reuse. Consider installing an air dryer
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Worn carrier or valve bore – measure carrier and valve bore, diametrical clearance should be between 0,05 - 0,13 mm.
Replace worn components as needed
PUMP CYCLES BUT WILL NOT PUMP:
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Too much suction lift - Reduce suction lift or try filling up liquid chambers with fluid
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Leak in suction line - Inspect, repair or replace
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Valve ball not seating properly, worn or damaged - Inspect, remove debris or replace
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Clogged suction pipe or hose - Inspect & clear
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Clogged strainer if used - Inspect & clear
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Diaphragm failure - Replace diaphragm
PUMPED LIQUID RELEASED FROM AIR EXHAUST:
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Diaphragm failure - Replace diaphragm
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Outer plate unthreading - Tighten & re-torque
