Nova-Tech Pulsafeeder OMNI DC7 - Manual (Page 28)

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Difficulty Probable Cause Remedy
Discharge pressure too high. Reduce pressure.
Water hammer. Install pulsation dampener.
Noisy gearing,
knocking
Low oil level. Examine sight glass on side of pump
Add or replace oil as required
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.
Piping noisy.
No surge chamber or dampener used. Install pulsation dampeners.
Pump overloaded. Check operating conditions against pump
design. Verify discharge pressure
High or low voltage. Check power source.
Motor overheats.
Loose wire. Trace and correct.
Incorrect motor wiring Verify and correct
Oil level low Check and add as necessary