Diagnostic display method for electronic cooking appliance control

• US 5,841,112 A
• Filed: 04/03/1997
• Issued: 11/24/1998
• Est. Priority Date: 04/03/1997
• Status: Expired due to Term

• Current Assignee: Whirlpool Corporation
• Original Assignee: Whirlpool Corporation
• Inventors: Brooks, Timothy L., Aukerman, Thomas Lee
• Primary Examiner(s): Paschall, Mark H.
• Application Number:
  US08/832,258
• Time in Patent Office: 600 Days
• Field of Search: 219/411-414, 219/501, 219/508, 219/481, 219/483, 219/485, 219/486, 219/497, 219/494, 219/487, 364/580, 364/551.01, 340/660, 340/461, 340/959, 340/438, 340/870.17, 340/870.16
• US Class Current: 219/506
• CPC Class Codes: G05B 19/042 using digital processors G05B19/05 takes precedence

Abstract

A cooktop service diagnostics method which is effected by a programmable controller system, wherein the programmable controller system: a) executes a routine upon receipt of a first specified pattern of input signals to the programmable controller: b) issues an activation audible signal to indicate receipt of the specified pattern of input signals; c) issues an activation visual signal to indicate receipt of the specified pattern of input signals; d) tests cooktop heating element drivers for malfunction conditions; e) tests cooktop controller input drivers for malfunction conditions; f) issues a malfunction visual signal to indicate the existence and type of any malfunction condition; g) terminates the routine upon the receipt of a second specified pattern of input signals to the programmable controller; h) issues a deactivation visual signal to indicate termination of the routine; and i) issues a deactivation audible signal to indicate termination of the routine.

Claims

1. A cooktop service diagnostics method which is effected by a programmable controller system, wherein the programmable controller:

a) executes a routine upon receipt of a first specified pattern of input signals selectively input by the cooktop operator to the programmable controller;

b) issues an activation audible signal to indicate receipt of the specified pattern of input signals;

c) issues an activation visual signal to indicate receipt of the specified pattern of input signals;

d) tests a plurality of cooktop heating element drivers for malfunction conditions;

e) tests a plurality of cooktop controller input drivers for malfunction conditions;

f) issues a malfunction visual signal to indicate the existence and type of any malfunction condition;

g) terminates the routine upon the receipt of a second specified pattern of input signals selectively input by the cooktop operator to the programmable controller;

h) issues a deactivation visual signal to indicate termination of the routine; and

i) issues a deactivation audible signal to indicate termination of the routine.

2. The method of claim 1, wherein the cooktop has at least one heating element with a controller associated therewith, the heating element controller having a plurality of temperature selection keys associated therewith;

and the first specified pattern comprises the actuation for a specified time period of two temperature selection keys associated with the heating element.

3. The method of claim 2, wherein the specified time period is at least 5 seconds.

4. The method of either claim 1, 2 or 3, wherein the second specified pattern comprising the actuation for a predetermined period of two temperature selection keys associated with the heating element.

5. The method of claim 4, wherein the predetermined period is at least 5 seconds.

6. The method of claim 5, wherein the first and second patterns of input signals are identical.

7. The method of claim 1, wherein the activation and deactivation audible signals comprise two beeps.

8. The method of claim 1, wherein the heating element controller also includes a visual indicator to indicate that the heating element is on;

and

the malfunction visual signal comprises a specified flashing of the visual indicator which indicates that the heating element is on, the number of flashes being a code to indicate the type of malfunction encountered during the testing steps.

9. The method of claim 8, wherein the cooktop has a plurality of heating elements with a like plurality of respective heating element controllers;

and

the malfunction visual signal comprises a specified flashing of the visual indicator of each heating element for which a malfunction was encountered.

10. The method of claim 8, wherein the heating element controller includes a plurality of visual temperature setting indicators;

and

the malfunction visual signal comprises an illumination of a specified one of said plurality of visual temperature setting indicators.

11. The method of claim 8, wherein the cooktop has a plurality of heating element controllers, each heating element controller having a plurality of visual temperature setting indicators;

and

the malfunction visual signal comprises illumination of a specified one of said plurality of visual temperature setting indicator for each heating element for which a malfunction was encountered.

12. The method of claim 8 or 9, wherein the number of flashes is coded as follows:

a) a single flash for short circuiting of a right rear heating element;

b) two flashes for short circuiting of a right front heating element;

c) three flashes for short circuiting of a left rear heating element;

d) four flashes for short circuiting of a left front heating element;

e) five flashes for a malfunction in the keys associated with the heating elements; and

f) six flashes for a malfunction in the power unit.

13. An electric range having a diagnostics system comprising:

at least one heating element;

at least one heating element driver associated with the at least one heating element;

at least one keypad for entry of data by a user;

at least one input driver associated with the at least one keypad; and

a programmable controller system interfacing with the at least one heating element driver and the at least one input driver, the programmable controller system programmed to;

a) execute a routine upon receipt of a first specified pattern of input signals selectively input by the cooktop user to the programmable controller;

b) issue an activation audible signal to indicate receipt of the specified pattern of input signals;

c) issue an activation visual signal to indicate receipt of the specified pattern of input signals;

d) test said at least one cooktop heating element driver for malfunction conditions;

e) test said at least one cooktop controller input drivers for malfunction conditions;

f) issue a malfunction visual signal to indicate the existence and type of any malfunction condition;

g) terminate the routine upon the receipt of a second specified pattern of input signals selectively input by the cooktop user to the programmable controller;

h) issue a deactivation visual signal to indicate termination of the routine; and

i) issue a deactivation audible signal to indicate termination of the routine.

14. The electric range of claim 13, wherein the cooktop has a plurality of temperature selection keys;

and the first specified pattern comprises the actuation for a specified time period of two temperature selection keys associated with the heating element.

15. The electric range of claim 14, wherein the specified time period is at least 5 seconds.

16. The electric range of either claim 13, 14 or 15, wherein the second specified pattern comprising the actuation for a predetermined period of two temperature selection keys associated with the heating element.

17. The electric range of claim 16, wherein the predetermined period is at least 5 seconds.

18. The electric range of claim 17, wherein the first and second patterns of input signals are identical.

19. The electric range of claim 13, wherein the activation and deactivation audible signals comprise two beeps.

20. The electric range of claim 13, wherein the heating element controller also includes a visual indicator to indicate that the heating element is on;

and

the malfunction visual signal comprises a specified flashing of the visual indicator which indicates that the heating element is on, the number of flashes being a code to indicate the type of malfunction encountered during the testing steps.

21. The electric range of claim 20, wherein the cooktop has a plurality of heating elements with a like plurality of respective heating element controllers;

and

the malfunction visual signal comprises a specified flashing of the visual indicator of each heating element for which a malfunction was encountered.

22. The method of claim 20, wherein the element controller includes a plurality of visual temperature setting indicators;

and

the malfunction visual signal comprises an illumination of a specified one of said plurality of visual temperature setting indicators.

23. The method of claim 20, wherein the cooktop has a plurality of heating elements with a like plurality of respective heating element controllers;

and

the malfunction visual signal comprises a specified flashing of the visual indicator of each heating element for which a malfunction was encountered.

24. The electric range of claim 20 or 21, wherein the number of flashes is coded as follows:

a) a single flash for short circuiting of a right rear heating element;

b) two flashes for short circuiting of a right front heating element;

c) three flashes for short circuiting of a left rear heating element;

d) four flashes for short circuiting of a left front heating element;

e) five flashes for a malfunction in the keys associated with the heating elements; and

f) six flashes for a malfunction in the power unit.

25. A service diagnostic system which comprises:

a cooktop power driver system which operatively drives a plurality of cooktop heating elements, an output and display driver interface which is operatively coupled to a cooktop display and a cooktop keypad; and

a programmable controller coupled between the input and display driver interface and the cooktop power driver system for communication input signals thereto and receiving feedback signals therefrom, said programmable controller programmed to;

a) execute a routine upon receipt of a first specified pattern of input signals selectively input by the cooktop operator to the programmable controller;

b) issue an activation audible signal to indicate receipt of the specified pattern of input signals;

c) issue an activation visual signal to indicate receipt of the specified pattern of input signals;

d) test said cooktop power driver system for malfunction conditions;

e) test said output and display interface for malfunction conditions;

f) issue a malfunction visual signal to indicate the existence and type of any malfunction condition;

g) terminate the routine upon the receipt of a second specified pattern of input signals selectively input by the cooktop operator to the programmable controller;

h) issue a deactivation visual signal to indicate termination of the routine; and

i) issue a deactivation audible signal to indicate termination of the routine.

26. The system of claim 25, wherein the cooktop keypad has a plurality of temperature selection keys;

and the first specified pattern comprises the actuation for a specified time period of two temperature selection keys associated with a heating element.

27. The system of claim 25, wherein the specified time period is at least 5 seconds.

28. The system of either claim 25, 26 or 27, wherein the second specified pattern comprising the actuation for a predetermined period of two temperature selection keys associated with a heating element.

29. The system of claim 28, wherein the predetermined period is at least 5 seconds.

30. The system of claim 29, wherein the first and second patterns of input signals are identical.

31. The system of claim 25, wherein the activation and deactivation audible signals comprise two beeps.

32. The system of claim 25, wherein the cooktop display also includes a visual indicator to indicate that a heating element is on;

and

the malfunction visual signal comprises a specified flashing of the visual indicator which indicates that the heating element is on, the number of flashes being a code to indicate the type of malfunction encountered during the testing steps.

33. The system of claim 32, wherein the cooktop has a plurality of heating elements and the cooktop keypad has a like plurality of respective heating element control keys associated with each;

and

the malfunction visual signal comprises a specified flashing of the visual indicator of each heating element for which a malfunction was encountered.

34. The system of claim 32, wherein the cooktop keypad includes a plurality of visual temperature setting indicators;

and

the malfunction visual signal comprises an illumination of a specified one of said plurality of visual temperature setting indicators.