27
Instruction Manual
PROBLEM
POSSIBLE CAUSE
SOLUTION
Pump Will Not Prime
1. Pump not turned ON or plugged in.
1. Turn ON pump / plug in pump.
2. Output dials not set properly.
2. Always prime pump with speed and
stroke at 100%.
3. Foot Valve not in vertical position on
bottom of tank.
3. Foot Valve must be vertical (
see Foot
Valve Installation, Section 2.8
).
4. Pump suction lift too high.
4. Maximum suction lift is 5 ft (1.5 m).
Pumps with High Viscosity Liquid
Handling Assemblies require flooded
suction.
5. Suction tubing is curved or coiled in
tank.
5. Suction tubing must be vertical. Use
LMI
®
ceramic weight supplied with
pump (
see Section 2.8
).
6. Fittings are over tightened.
6. Do not overtighten fittings. This
causes seal rings to distort and not
seat properly which causes pump to
leak back or lose prime.
7. Air trap in suction valve tubing.
7. Suction tubing should be as vertical
as possible. AVOID FALSE
FLOODED SUCTION!
(
see Section 2.2.1
).
8. Too much pressure at discharge.
(Pumps without multi-function
valve.)
8. Shut-OFF valves in pressurized line.
Disconnect tubing at injection check
valve (
see Priming Section 3.2
).
When pump is primed, reconnect
discharge tubing.
Pump Loses Prime
1. Solution container ran dry.
1. Refill container with solution and
reprime (
see Section 3.2
).
2. Foot Valve is not in a vertical
position on the bottom of the tank.
2. Foot Valve must be vertical (
see Foot
Valve Installation, Section 2.8
).
3. Pump suction lift is too high.
3. Maximum suction lift is 5 ft (1.5 m).
Pumps with High Viscosity Liquid
Handling Assemblies require flooded
suction.
4. Suction tubing is curved or coiled
in tank.
4. Suction tubing must be vertical. Use
LMI
®
ceramic weight supplied with
pump (
see Section 2.8
).
5. Fittings are over tightened.
5. DO NOT OVERTIGHTEN FITTINGS.
This causes seal rings to distort and
not seat properly which causes pump
to leak back or lose prime.
6. Air trap in suction valve tubing.
6. Suction tubing should be as vertical
as possible. AVOID FALSE
FLOODED SUCTION!
(
see Section 2.2.1
).
7. Air leak on suction side.
7. Check for pinholes, cracks. Replace if
necessary.
SECTION 5 - TROUBLESHOOTING