Method of operating a transport refrigeration unit

Details Method of operating a transport refrigeration unit Method of operating a transport refrigeration unit

1991-07-11

1992-06-23

Wayner, William E.

Refrigeration

Processes

Circulating external gas

62231, 236 94, 34087002, F25B 1900, G08B 2300

Patent

active

051232510

ABSTRACT:
A method of logging the operating time of a plurality of predetermined timeable functions of a transport refrigeration unit which includes the step of providing a plurality of hourmeters, at least certain of which are programmable. One of the plurality of timetable functions is selected for each programmable h ourmeter. Each hourmeter includes a first memory, with the operating time of the associated selected timeable function being stored in the first memory. The times stored in the first memories of the hourmeters are individually transferred to a second memory which is common to all of the hourmeters in response to a predetermined event. In a preferred embodiment, the second memory has a plurality of memory banks, one of which is an active storage location for all hourmeters, until the occurrence of a predetermined event, at which time another of the memory banks becomes the active storage location for all hourmeters.

REFERENCES:
patent: 4574871 (1986-03-01), Parkinson et al.
patent: 4583682 (1986-04-01), Hernandez
patent: 4663725 (1987-05-01), Truckenbrod et al.
patent: 4918932 (1990-04-01), Gustafson et al.

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