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© 2000 McDonald’s Corporation
819-5432 NOV 05
All Rights Reserved
Card 15
High-Limit Check
(With MACC100A, M100A, and M100B Computer only.)
Result: The
light will illuminate and the display will show the actual temperature of
the cooking oil. At 410°F (210°C) ± 10°F (6°C), the first high-limit feature will trip.
The display will show (alternating) "HI-1" and the actual vat temperature.
Note: When the display shows (alternating) "HI-1" and the temperature or the
temperature exceeds 425°F (218°C), release the
button.
Caution: If the temperature exceeds 425°F (218°C) without a "HI-1" display, the first
high-limit warning is not functioning properly. Note this defect and continue this
procedure to test the second high-limit.
4.
To start the "second high-limit test", press and hold the
button.
Result: The vat heat light will illuminate and the display will show the actual
temperature during the test. The mechanical second high-limit should trip between 425°
and 450°F (218° and 232°C). When the second high-limit trips, the display will read
(alternating) "HI-2" and the actual temperature.
Caution: When the display shows "HI-2" or the temperature exceeds 470°F (232°C),
release the
button.
Note: The display will continue to read "HI-2" until the fryer has cooled to 400°F
(204°C) or less and the vat has then been reactivated by turning the computer “OFF”
then back “ON”. The cooking program previously used will be displayed; i.e., FR
FRIES, PIES, McNUGGETS, etc.
Caution: If the display shows "HI-2" "BAD", press the
(MACC100A and M100A)
or
(M100B) button to turn the computer “OFF”. REPLACE the mechanical second
high-limit thermostat immediately.
5.
High-limit control check is complete.
6.
Repeat the same procedure for other vats.
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 computer 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
repair or replace the computer or 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.
High-Limit Check
(With M2000 Computer only.)
Note: Conduct this test when the 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: The cooking oil should be at the upper
OIL LEVEL
line. Add oil if necessary.
Note: Grease filters must be in place and exhaust fans must be on during entire high-
limit control check procedure.
Note: The high-limit test program allows the operator to test the trip-out temperature of
the first and second high-limit thermostats. The first high-limit feature is a function
performed by the computer and must be reset by turning the computer OFF, then back
ON. The second high-limit automatically resets when the cooking oil has cooled to
below 350°F (177°C) or less.
Continued from previous
page.
When
Quarterly
Tools
Flat blade screwdriver,
7/16" (13 mm) open-end
wrench, and multimeter
(that measures DC
microamps).
Continued from previous
page.
When
Monthly
Tools
None
15
