Frymaster 17EC - Manual (Page 66)

7-2
NOTE: The cooker has a high-limit safety. If the water in the cookpot falls below the low-water-
level sensor but the sensor remains grounded for whatever reason (thereby allowing the element to
continue to heat), the high-limit switch will open when the element temperature reaches 400 ±15ºF.
This cuts off power to the element.
Units with Computer Controls
When the computer POWER switch is pressed, a logic circuit in the computer checks the water level
in the cookpot. A normally closed solenoid valve on the water supply line automatically opens if the
upper water-level sensor is not grounded by contact with water in the cookpot. Water will continue
to be added until the upper water level sensor is grounded by contact with water in the cookpot. If
there is sufficient water in the cookpot to cover the heating element (i.e., the lower water level sensor
is grounded by contact with water in the cookpot), the computer signals the contactor coil to close,
thereby energizing the heating element. If the temperature of the water in the cookpot is below the
cooking setpoint temperature programmed into the computer, -ºlo appears in the computer’s LED
display. If the temperature of the water in the cookpot is within 11ºF (6ºC) of the programmed
setpoint, “
- - - - ” appears in the computer’s LED display.
If the SIMMER mode is selected by pressing the R button, logic circuits in the computer monitor
the temperature of the water and cycle power to the element on and off to maintain the temperature
at the setpoint programmed into the computer. (See Chapter 3 for instructions on adjusting the
setpoint.) If the BOIL mode is selected by pressing the L button, the heating element remains
continuously energized until the SIMMER mode is again selected.
NOTE: The cooker has a high-limit safety. If the water in the cookpot falls below the low-water-
level sensor but the sensor remains grounded for whatever reason (thereby allowing the element to
continue to heat), the high-limit switch will open when the element temperature reaches 400 ±15ºF.
This cuts off power to the element.
The Autoskim feature is activated by placing the SKIM switch in the ON position. When the feature
is activated, a logic circuit in the computer automatically opens the solenoid valve in the water
supply line for three seconds every minute until the option is turned off by placing the switch in the
OFF position.
On units equipped with faucets, the faucet is turned on by placing the FAUCET switch in the ON
position. This opens a dedicated normally closed solenoid valve on the faucet water line. The
solenoid valve remains open until the switch is placed in the OFF position.
When a product button is pressed to initiate a cooking cycle, the programmed cook time appears in
the LED display and begins to count down. When the specified cook time has elapsed, an audible
alarm sounds and the associated product button flashes. Simultaneously, logic circuits in the
computer activate the appropriate basket lift motor, lowering the basket into the cookpot. As the
motor drives the basket lift arm down, a cam attached to the motor eventually loses contact with a
roller-activated microswitch and power to the motors is cut. When the computer times out, logic
circuits reverse the switch positions so that the motor circuit is again completed and the motor is
restarted, raising the basket from the cookpot. At the fully raised position, the cam again makes
contact with the microswitch, cutting power to the motor and stopping the lift in the up position.