Improper Temperature Control; Computer Malfunctions; Filtration Malfunctions - Frymaster BIGLA30 Series Service Manual

1.10.3 Improper Temperature Control

Temperature control, including the melt cycle, is a function of several interrelated components, each of which must
operate correctly. The principle component is the temperature probe. Other components include the interface board, the
computer itself, and the ignition module.
Improper temperature control problems can be categorized into melt cycle problems and failure to control at setpoint
problems.
MELT CYCLE PROBLEMS
Initiation of the melt cycle with M3000 computers is automatic. Problems may originate from the computer itself, the
temperature probe, or a malfunctioning heat relay on the interface board.
FAILURE TO CONTROL AT SETPOINT
Problems in this category may be caused by the temperature probe, the interface board, or the computer.

1.10.4 Computer Malfunctions

RECOVERY TIME
Recovery time – is a method of measuring a fryer's performance. Put simply, it is the time required for the fryer to
increase the oil temperature from 250ºF to 300ºF (121ºC to 149ºC). This range is used as a standard since ambient
kitchen temperatures can affect the test if lower ranges are used.
The M3000 computer performs the recovery test each time the fryer warms up. An operator can view the results of the
test any time the fryer is above the 300ºF (149ºC) point by pressing the INFO button once when the fryer is on. The test
results will be displayed in the computer's LED panel in minutes and seconds. The maximum acceptable recovery time
for BIGLA30 Series LOV™ gas fryers is two minutes and twenty-five seconds .
1.10.5

Filtration Malfunctions

The majority of filtration problems arise from operator error. One of the most common errors is placing the filter pad on
the bottom of the filter pan rather than over the filter screen.
Whenever the complaint is "the pump is running, but no oil is being filtered," check the installation of the filter pad,
including that the correct size is being used. While you are checking the filter pad, verify that the O-rings on the filter
pan suction tube are present and in good condition. Missing or worn O-rings will allow the pump to suck air and
decrease its efficiency.
If the pump motor overheats, its thermal overload will trip and the motor will not start until it is reset. If the pump
motor does not start, press the red reset switch located on the front of the motor. If the pump then starts, something
caused the motor to overheat. It may be just that several frypots in a large battery of fryers were being filtered one after
the other and the pump became hot. Letting the pump cool down for at least a half-hour is all that is required in this
case. More often, the pump overheated for one of the following reasons:

Shortening that remained in the pan after previous filtering solidified in the suction tube recess in the bottom of
the pan or the suction tube, itself. Adding hot oil to the pan and waiting a few minutes will usually correct this
problem. A flexible wire can be used to clean out the suction tube and the recess in the bottom of the pan.
NEVER use compressed air to blow solidified shortening out of the suction tube!

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.
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
When
FLOW
1-20
PUMP
Sediment
Particle
Up for
reverse
Down for
forward