Pump Solutions Group Neptune Polymaster Liquid Polymer Blend & Feed System - Manual (Page 22)

17
TROUBLESHOOTING
PROBLEM
POSSIBLE CAUSE
SOLUTION
Pump running but not
pumping chemical.
Air leak in suction line.
Tighten hosing and clamps.
Check a-ring in strainer cap to see if
dislodged or cracked. Replace if
cracked or missing.
Empty polymer drum
Check polymer supply.
Plugged suction line. Clean suction line, check strainer
basket.
Pump check valves dirty.
Inspect or clean pump valves.
Clogged or missing foot valve.
(Top mount pump only)
Clean or add foot valve.
Pump rate set too low.
Increase stroke speed or length.
Polymer has hardened in check valve
or 90° elbow connection To Gatlin.
Clean out check valves and elbow of all
hardened polymer.
Pump loses prime after
operation. Air leaks in suction line or
missing/defective foot valve. Tighten solution clamps using tape.
Install foot valve on end of suction
hose. Use drum suction wand with
foot valve.
Refer to all remedies under "pump won't
prime section" of pump instruction manual.
Pump starts, then stops. Insufficient water pressure turning
off pump power. Check available water pressure and
flow rate.
Incomplete mixing. Too low a flow. Use smaller Polymaster unit or
increase water flow.
Polymer flow rate low. System pressure too high.
Double check pressure at outlet to be
sure it does not exceed pump nameplate
rating or dilution water pressure
Pump check valves dirty.
Inspect or clean valves.
4-20 mA signal not correct.
Check instrument providing signal.
Refer to the enclosed pump manufacturer’s instruction manuals for additional
troubleshooting information relating to the polymer feed pump.