High-limit check, Scratch calibration check – Frymaster 819-5432 User Manual

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© 2000 McDonald’s Corporation

819-5432 NOV 05

Card 15

High-Limit Check

(With M2000 Computer only.)

1. Turn the fry vat OFF by pressing the

button. The computer should display

OFF. The

computer must be off to enter the programming mode.

2. Enter the programming mode by pressing the

button.

Code will show in the left

display.

3. Enter the code

YZ-

(9999) to check high-limits for a full vat or right side of split

pot. To test the left side of a split pot, enter the code

VWX

(8888).

Note: This test can only be conducted with the oil temperature above 180°F. If the
shortening/oil temperature is below 180°F, the computer will display

too cold.

Hi-Limit shows in the right display (left display for left-side split vat).

5. For high-limit test #1, press and hold the right

cook channel button (left

cook

channel button if testing the left side of a split pot).

6. The heat indicator should illuminate, indicating the fryer is calling for heat.

7. The right display will alternate between

HI-Limit and the oil/shortening temperature until

the temperature reaches 410°F (210°C). At 410°F (210°C),

Hi-1 is displayed, alternating

with the current temperature. The heat indicator

goes out, indicating that the fryer is no

longer calling for heat. High-limit test #1 is complete.

8. For high-limit test #2, press and hold the right

cook channel button (left

cook

channel button if testing the left side of a split pot).

9. The right display will alternate between

Hi-Limit and the oil/shortening temperature until

the mechanical high-limit opens (approximately 425°F (218°C). The right display will then
show

Hi-2.

10. Failure of high-limit test #2 is indicated by an alternating display of

hi-2 and bad. Call

for service immediately if this occurs.

11. Press

to clear the test and turn the computer 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 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 410°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.

Scratch Calibration Check

(Gas Fryers Only) (Should be done by a qualified service person.)

Caution: Portions of fryer will be hot during this scratch calibration.

Note: Conduct this test when fryer will not be needed for about one hour.

1. Contact the local gas company or service agency to check the gas pressure out of the

fryer's gas regulator.

Result: Gas pressure must be 3.0" W.C. (76 mm W.C.) natural gas or 8.25" W.C. (210
mm W.C.) propane gas.

Caution: If the pressure does not meet above requirements the fryer gas valve regulator
must be adjusted by the service agency to obtain the correct pressure.

Continued from previous
page.

When
Quarterly

Tools
Flat blade screwdriver,
7/16" (13 mm) open-end
wrench, and multimeter
(that measures DC
microamps).