Nova-Tech LMI Roytronic Series A Metering Pump - Manual (Page 38)

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TROUBLESHOOTING
6.0 Troubleshooting (continued)
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 Sec-
tion 5.4)
4. Solution attacking Liquid Handling
Assembly
4. Consult your local distributor for alter-
nate 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 pres-
sure rating. Consult factory for more
information.
6. Clogged Foot Valve strainer. 6. Remove Foot Valve strainer when
pumping slurries or when solution par-
ticles 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 the
resistance of the EPU across the EPU
wires. Consult supplier or factory. (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.