Nova-Tech LMI Roytronic Excel Series AD Metering Pump User Manual
Page 41
41
TROUBLESHOOTING
PROBLEM
POSSIBLE CAUSE
SOLUTION
Leakage at tubing
1. Worn tubing ends.
1.
Cut about 1 in (25 mm) off tubing and
then replace as before.
2.
Loose or cracked fitting.
2.
Replace fitting if cracked. Carefully
hand tighten fittings. DO NOT USE
PIPE WRENCH. An additional 1/8 or
1/4 turn may be necessary
3.
Worn seal rings.
3.
Replace balls and seal rings
(see Section 5.4)
4.
Solution attacking Liquid Handling
Assembly
4.
Consult your local distributor for
alternate materials.
Low Output or Failure to
Pump Against Pressure
1.
Pump’s maximum pressure rating is
exceeded by injection pressure.
1.
Injection pressure cannot exceed
pump’s maximum pressure. See
pump data plate.
2.
Worn Seal Rings.
2.
Worn seal rings or cartridge valves
may need replacement
(see Section 5.4).
3.
Ruptured Liquifram™.
3.
Replace Liquifram™ (see Section 5.3).
4.
Incorrect stroke length.
4.
Recalibrate Output
(see Section 4.3.2)
5.
Tubing run on discharge may be too
long.
5.
Longer tubing runs may create
frictional losses sufficient to reduce
pump’s pressure rating. Consult
factory for more information.
6.
Clogged Foot Valve strainer.
6.
Remove Foot Valve strainer when
pumping slurries or when solution
particles cause strainer to clog.
Failure to Run
1. Pump not turned on or plugged in.
1.
Turn on or plug in pump.
2.
EPU failure.
2.
Disassemble pump and measure
resistance across the EPU terminals.
If this measures as an open circuit
then the EPU should be replaced.
(see Section 5.8).
3.
Pulser failure.
3.
The pulser should be replaced if
EPU checks out OK. Consult supplier
or factory.
Excessive Pump Output 1. Syphoning. (Pumping downhill
without a multi-function valve).
1.
Move injection point to a pressurized
location or install an LMI 4-FV
(see Section 3.4).
2.
Little or no pressure at injection
point.
2.
If pressure at injection point is less
than 25 psi (1.7 Bar), an LMI 4-FV
should be installed (see Section 3.4).
3.
Excessive strokes per minute.
3.
Replace pulser or resistor.
Consult factory.