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FAILURE TO CONTROL AT SETPOINT
Problems in this category may be with the temperature probe, the interface board, or the controller.
1.7.4 Computer-Related Problems
COMPUTER MAGIC III FEATURES
SENSITIVITY OR “STRETCH AND SHRINK TIME”
Sensitivity or stretch time is a programmable feature, patented by Frymaster, which increases or
decreases the cooking time countdown based on variations in the oil temperature from the set point.
The sensitivity for each product button has ten settings (0 through 9). A zero sensitivity setting will
disable the feature (no change in cooking time), while a nine will provide the highest sensitivity or
most change. The correct sensitivity for any product is based on the product, its density, the set
point temperature, and the customer’s own requirements.
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 effect the test if lower ranges are used.
The Computer Magic III 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
button and entering the code 1652. The test results will be displayed in the computer’s LED panel in
minutes and seconds. The maximum acceptable recovery time for the H50 Series of fryers is two
minutes and twenty-five seconds.
COMMON COMPUTER COMPLAINTS
Most problems concerning computers have to do with programming them. There are four common
complaints. The complaints, their causes, and corrective actions are:
1. Fryer constantly displays “HI.”
Cause: Setpoint incorrect or missing.
Corrective Action: Press
1650, enter the correct setpoint using keypad, then press to lock
in the setpoint.
2. Temperature is displayed in Celsius.
Cause: Computer is programmed to display in Celsius.
Corrective Action: Press 1658.
3. Temperature is constantly displayed.
Cause: Computer is programmed for constant temperature display.
Corrective Action: Press
165L.
4. Computer times down too slowly or too quickly.