Troubleshooting - Little Giant OS3 Series Owner's Manual

MAINTENANCE

Troubleshooting

Troubleshooting
Problem
Pump does not run
Pump turns off
before water reaches
bottom probe
Overload trips
frequently
Pump runs
continuously
For technical assistance, parts, or repair, please contact:
800.701.7894 | littlegiant.com
998668 Rev. 004 06/22
Probable Causes
Panel not plugged into outlet Plug power cord into outlet and check power.
Pump not plugged into panel Plug pump into panel plug.
Defective contactor
Overload tripped (optional
models)
Loose level sensor wires
Pump failure
Poor pump or system ground Check grounding system.
Improper overload setting
Preset level sensor cable and
pump power cord not
separated
Corrective Action
Replace contactor.
Press Reset.
Tighten wire connections.
Replace pump.
Set overload relay dial to full load amps of pump.
Make sure the preset level sensor cable and the
power cord from the pump are separated by at least
2 inches in the tank and 2 inches above ground.
Franklin Electric Co., Inc. | Oklahoma City, OK 73157-2010
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