40
Instruction Manual
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 4.4
).
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 4.4)
.
3. Ruptured LIQUIFRAM™.
3. Replace LIQUIFRAM™
(see Section 4.3)
.
4. Incorrect stroke length.
4. Recalibrate Output
(see Section 3.3.2)
.
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 4.8)
.
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 2.4)
.
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 2.4)
.
3. Excessive strokes per minute.
3. Replace pulser or resistor. Consult factory.
