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PROBLEM
Pump motor does not
Black and/or red probe shorted
pump.
Problem with motor or motor wiring
Problem with Liquid Level Control
Board.
Water pressure from water source is
not high enough.
Pump will not run but
Common Lead (Green) shorted out to
tank appears to be
Red wire (High Probe)
always full.
Pump will not run but
Common Lead (Green) shorted out to
tank level appears to
Black wire (Low Probe)
be below start level.
Pump motor does not
Problem with Liquid Level Control
shut off.
Board
Probe Harness Connection may be
open.
Water may not be reaching top probe
in carb tank.
High Lead (Red) open or not
connected.
Common lead (Green) open or not
connected.
Pump motor
Problem with probe or probe harness.
intermittent
Problem with motor or motor wiring.
All manuals and user guides at all-guides.com
TROUBLESHOOTING
PUMP
POSSIBLE CAUSE
CORRECTIVE ACTION
Remove probes and bend straight or replace with new
probe(s)
Check line voltage first. Check AC voltage across
load terminals on Liquid Level Control. If voltage is
120 plus or minus 10%, replace motor or motor wiring.
Check line voltage first. If AC voltage across load
terminals is not 120 plus or minus 10%, replace the
Liquid Level Control Board.
Verify water pressure leading into pump inlet is 40 psi
minimum with pump running.
Verify Green and Red wires are not touching.
Verify Green and Black wires are not touching.
Short the "H & L" terminals on the Liquid Level Control
Board. If motor does not shut off, replace Liquid Level
Control Board.
Verify connections are good or replace the wiring
harness.
Verify tank is not filled with CO
valve up and letting air escape until water begins
coming out.
Verify Red lead wire is connected from tank to unit.
Verify Green lead wire is connected from tank to unit.
Check motor and motor wires by removing red and
black wires from the Liquid Level Control Board. If
okay, short "H & L" terminal on Liquid Level Control
Board. If motor stays off, verify probes and bend
straight or replace. Verify with meter.
Measure AC voltage across load terminals on Liquid
Level Control Board. If line voltage is 120 plus or
minus 10% replace motor or motor wiring.
Installation and Service Manual
or air by pulling relief
2
57
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