Self-diagnostic system for a refrigerator
US5398251A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 9, 1991 |
| Grant date | Mar 14, 1995 |
| Priority date | — |
| Expiry date | May 9, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/2654
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The self-diagnostic system for refrigerator appliance controlled by the following routine steps in a control program: a reset routine for designating input and output ports and clearing all memories upon powering up, and thereafter storing initial value into a desired memory; a timer interrupt routine for being periodically carried out every time set by the reset routine and storing an elapsed time in a selected memory; an initial display subroutine for turning on all lamps, then turning off a shut-off display lamp in a predetermined time set by the timer interrupt routine, automatically turning on a normal state display lamp and an alarm lamp, and driving a compressor in order to actuate a refrigerator; a main routine for determining whether time cycle set by said timer interrupt routine has been set and executing a plurality of routines detecting malfunction of the appliances and alerting the user to the occurrence of the malfunction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.