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24G SERIES FLATBOTTOM GAS FRYERS
CHAPTER 1: SERVICE PROCEDURES
1-23
1.8.3 Improper Temperature Control
Temperature control, including the melt cycle, is a function of several interrelated components, each
of which must operate correctly. The principal component is the temperature probe. Depending
upon the specific configuration of the fryer, other components may include the Thermatron board,
the controller itself, and the ignition module.
Improper temperature control problems can be categorized into melt cycle problems and failure to
control at setpoint.
Failure to Control at Setpoint
In fryers equipped with a Thermatron temperature controller, the #1 problem may be with the
temperature probe improperly positioned. Other causes may be the Thermatron board or the
potentiometer. Possible causes are that the potentiometer is out of calibration, or the temperature
probe or Thermatron board is defective. Refer to Section 1.6 for instructions on calibrating the
Thermatron temperature controller.
1.8.4 Filtration Problems
Whenever the complaint is "the pump is running, but no oil is being filtered", check the filter paper
or filter leaf (screen) connections and ensure they are properly connected. Ensure the filter paper or
filter leaf is not clogged with food debris or sediment, and is properly assembled.
If the pump motor overheats, a circuit breaker in the filter circuit will trip and the motor will not start
until it is reset. If the pump motor does not start after pressing the circuit breaker, press the red reset
switch located on the rear of the motor. If the pump then starts, something caused the motor to
overheat. Maybe several frypots were filtered one after the other and the pump got hot. Letting the
motor 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 was solidified in the filter leaf or filter lines.
• The operator attempted to filter unheated oil or shortening. Cold oil and shortening are thicker
and cause the pump motor to work harder and overheat.
If the motor runs but the pump does not, there is a blockage in the pump. An incorrectly assembled
filter leaf allows food particles and sediment to pass through the filter pan and into the pump. When
sediment enters the pump, the gears bind up causing the motor to overheat, tripping the thermal
overload. Solidified shortening in the pump will produce the same result.