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© 2000 McDonald's Corporation
All Rights Reserved
High-Limit Check
Note: When the display shows "HI-1-412°F (211°C)", or the temperature exceeds 425°F
(218°C), release the
4. To start the "second high-limit test", press and hold the
show the actual temperature during the test. The mechanical second high-limit will trip
between 425°F (218°C) and 450°F (232°C).
Result: When the second high-limit trips, the display will read (alternating) "HI-2" and
the actual temperature.
Caution: When display shows "HI-2" or the temperature exceeds 450°F (232°C), release
the
button.
Note: The display will continue to read "HI-2" until the fryer has cooked to 400°F
(204°C) or less and the vat is reactivated by pressing
30 seconds, then pressing
5. The computer will return to the operating mode and display the cooking program
previously used, i.e. FR FRIES, PIES, NUGGETS, etc.
6. High-limit control check is complete.
7. Repeat same procedure for other vats.
Caution: If the display shows "HI-2" "BAD", press
Replace the computer immediately.
High-Limit Check
Note: Conduct this test when fryer will not be needed for about 1 hour, and when the
cooking oil is due to be changed. Discard the cooking oil after completing this check
Note: Only one side of a split-vat is to be checked at a time.
Caution: Grease filters must be in place and exhaust fans must be ON during entire high-
limit control check procedure.
1. The cooking oil should be at the normal (upper) oil-level line. Add cooking oil if necessary.
2. Remove the computer probe from the probe holder and replace it with fry vat probe.
3. Turn the vat power switch to ON and set thermostat knob to its highest setting, and wait for
heating light to go OFF.
Caution: If after completing both high-limit tests you find only the second high-limit
operates properly, the vat can be used if it is absolutely necessary, but with extreme care.
The controller must be replaced immediately after this period of necessity. If the second
high-limit does not work, the vat must not be used until the second high-limit has been
replaced. If the first high-limit feature activates at less than 400°F (204°C), do not
replace the controller unless it interferes with proper cooking. If the second high-limit
activates at less than 425°F (218°C), do not replace it unless it prevents you from
checking the first high-limit feature.
4. Press and hold "first high-limit" position of the vat high-limit test switch.
Result: Electrical element or gas burner turns OFF and "TROUBLE" light comes ON.
Cooking oil temperature should be between 400° and 425°F (204° and 218°C).
5. Press and hold "second high-limit" position of the vat-limit test switch.
(With MACC100 Computer only.)
button.
to turn computer ON.
(With Thermostat Controller only.)
button. This display will
turning the computer OFF for
,
to turn the computer "OFF".
819-5432 NOV 05
Card 15
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