Pump-solutions-group Neptune Series 560 dia-PUMP Manuel d'utilisateur télécharger pdf (Page 16)

SECTION V

TROUBLE SHOOTING CHART

Symptom Cause Remedy

1. Pump Motor Will Not

Operate.

A. Blown Fuse. Check for short circuit or overload.

B. Low liquid level in tank (where low

level cut-off is used).

Fill tank.

C. Broken wire. Locate and repair.

D. Low voltage. Check for too light wiring.

E. Oil “frozen” in pump. Thaw out.

*2. Pump Does Not

Deliver Rated Capacity

A. Starved suction. Replace suction piping with larger size, or

increase suction head.

B. Leaky suction piping. Pressure test, repair or replace defective

piping.

C. Excessive suction lift. Rearrange equipment location to reduce

suction lift.

D. Liquid too close to boiling point. Lower temperature or increase suction head

pressure slightly.

E. Air or gas trapped in oil or chemical

solution.

Decrease capacity to 20% for 7 minutes,

then increase to 100% for 7 minutes.

F. Worn or dirty valves or seats, or

both.

Clean or replace.

G. Viscosity of liquid too high. (1) Reduce viscosity by heating or other

means.

(2) Increase size of suction piping.

(3) Increase suction pressure slightly

H. Insoluble materials, crystallization or

solids settling.

Limit solution strength to 5% by weight.

Flush and clean solution tank periodically.

Suction connection should be 2" - 4" from

bottom of solution tank.

I. Low discharge pressure. A minimum discharge pressure of

50 psi is required to insure proper capacity

control.

J. Air in hydraulic or chemical systems. Bleed system.

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Pump-solutions-group Neptune Series 560 dia-PUMP Manuel d'utilisateur Page 16

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