MELT CYCLE PROBLEMS
In fryers equipped with thermostat controls, the melt cycle is controlled by a mechanical timer. There are three components that may fail: the melt cycle timer itself, the melt cycle timer mi- croswitch, or the control panel melt cycle ON/OFF switch. In all cases, the defective component must be replaced.
In fryers equipped with other types of controllers, the problem may be with the controller itself, the temperature probe, or a malfunctioning heat relay on the interface board.
For problem isolation techniques, refer to the troubleshooting guides TROUBLESHOOTING THE THERMOSTAT and
FAILURE TO CONTROL AT SETPOINT
In fryers equipped with thermostat controls, the problem will be with the thermostat itself. Possible causes are that the thermostat is out of calibration, the knob or flexible shaft is loose on the thermo- stat shaft, a thermostat wire is disconnected or broken, or the thermostat is defective. Refer to Sec- tion 1.7 for instructions on calibrating the thermostat.
In fryers equipped with other types of controls, the problem may be with the temperature probe, the interface board, or the controller. Refer to the troubleshooting guide
for problem isolation techniques.
1.9.4 Computer-Related Problems
COMPUTER MAGIC FEATURES
SENSITIVITY OR “STRETCH AND SHRINK TIME”
Sensitivity or stretch time is a programmable feature, patented by Frymaster that increases or decreases the cook 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 or rate of rise 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 performs the recovery test each day as the fryer warms up. An operator can view the results of the test any time the fryer is above the 325ºF (163ºC) 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 acceptable recovery time for 45 Series fryers is 2 minutes and 25 seconds.