Nova-Tech Pulsafeeder OMNI DC2-DC6 - Manual (Page 28)

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Difficulty Probable Cause Remedy
Noisy gearing,
knocking Discharge pressure too high. Reduce pressure.
Water hammer. Install pulsation dampener.
Stroke length at partial setting. Some operating noise is characteristic of
lost motion pumps.
Low grease level. Add or replace grease.
Piping noisy. Pipe size too small. Increase size of piping - install pulsation
dampener.
Pipe runs too long. Install pulsation dampener in line.
Pulsation dampener inoperative or
flooded. Refill with air or inert gas. Inspect and
replace diaphragm and recharge.
No surge chamber or dampener used. Install pulsation dampeners.
Motor overheats. Pump overloaded. Check operating conditions against pump
design. Verify discharge pressure
High or low voltage. Check power source.
Loose wire. Trace and correct.
Incorrect motor wiring Verify and correct