Filter
Top Products
1-23
Sediment
Particle
FLOW
Up for
reverse
Down for
forward
PUMP
• The operator attempted to filter oil that was not heated. Cold oil is thicker and causes the
pump motor to work harder and overheat.
If the motor hums but the pump does not rotate, there is a blockage in the pump. Incorrectly sized or
installed paper will allow food particles and sediment to pass through the filter pan and into the
pump. When sediment enters the pump, the gears can bind up and cause the motor to overload,
tripping the thermal overload. Solidified shortening in the pump will also cause it to seize, with
similar results.
A pump seized by debris or hard shortening can usually be freed by manually moving the gears with
a screwdriver or other instrument as illustrated on the following page. Make sure power to the
pump motor is off before trying this.
1. Disconnect power to the filter system.
2. Remove the input plumbing from the pump.
3. Use a screwdriver to manually turn the gears.
• Turning the pump gears backwards will
release a hard particle and allow its
removal.
• Turning the pump gears forward will push
softer objects and solid shortening through
the pump and allow free movement of the
gears.
Filter paper/pads that are installed incorrectly will also allow food particles and sediment to pass
through and clog the suction tube recess on the bottom of the filter pan or the suction tube, itself.
Particles large enough to block the suction tube recess or the suction tube may indicate that the crumb
tray is not being used.
The electronics of the FootPrint PRO system, illustrated in the schematic on the following page, are
simple and straightforward.
Microswitches, which are attached to handles for each vat and wired in parallel, provide the 24 VAC
required activating the pump relay coil when the
handles are moved to the ON position. The
activated pump relay coil pulls in the pump motor
switch, supplying power to the pump motor.
Verifying Solenoid Operation
Proper operation of the 24 VAC manifold and
pump solenoids can be verified by removing
the pump motor lead from terminal 4 of the
pump motor relay in the filter wiring box and
then activating the oil return lever. Proper
solenoid operation will be evidenced by an
audible “click” or vibration of both the pump
solenoid and the manifold solenoid.
M
Pump Relay Coil
Micro-switches
Pump Motor Switch
Pump Motor
Solenoids
24 VAC
Line VAC
FootPrint PRO Schematic
Pump Heater Tape