Pump Solutions Group Neptune Series 600 dia-PUMP MODELS 610 thru 647 - Manual (Page 17)

SECTION V
TROUBLE SHOOTING CHART
SYMPTOM CAUSE REMEDY
1. Pump Motor Will Not Operate. A. Blown Fuse. Check for short circuit
B. Open thermal overload device
in starter Reset.
C. Low liquid level in tank (where
low level cut-off is used). Fill Tank.
D. Broken Wire Locate and repair.
E. Low voltage Check for too light wiring.
F. Oil “frozen” in pump. Thaw out.
2. Pump Does Not Deliver Rated
Capacity. A. Starved suction. Replace suction piping with larger
size.
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 pressure slightly.
E. Air or gas trapped in oil of
chemical solution. Decrease capacity to 20% for 7
mins., then increase to 100% for 7
mins. Bleed air from valve
system.
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 to 4” from
bottom of solution tank.
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