Abstract: A system and a method are provided for monitoring a condition and selectively executing a certification defrost algorithm for a heating, ventilation, and air conditioning (HVAC) system in response to the status of the monitored condition. A system and a method are provided for selectively operating a certification defrost algorithm in parallel to a field defrost algorithm. A system and a method are also provided for causing a controller to execute a first algorithm and for causing the controller to selectively execute a second algorithm while also executing the first algorithm where each of the first algorithm and the second algorithm are configured to selectively cause the HVAC system to operate in a defrost mode.

Abstract: A system and method is provided for monitoring a system pressure to infer whether a high pressure cut out (HPCO) switch has opened disabling a heating, ventilating, and air conditioning (HVAC) compressor. A system and method are also provided for determining whether to disable the heating, ventilating, and air conditioning (HVAC) compressor based on a status of a low pressure cut out (LPCO) switch, an ambient temperature, and system mode state. The systems and methods may be used interchangeably with the appropriate adjustments to decision limits, such as where the LPCO may be monitored to infer status and the HPCO status may be directly used with temperature and system mode state.

Abstract: A system and method is provided for monitoring a system pressure to infer whether a high pressure cut out (HPCO) switch has opened disabling a heating, ventilating, and air conditioning (HVAC) compressor. A system and method are also provided for determining whether to disable the HVAC compressor based on a status of a low pressure cut out (LPCO) switch, an ambient temperature, and system mode state. The systems and methods may be used interchangeably with the appropriate adjustments to decision limits, such as where the LPCO may be monitored to infer status and the HPCO status may be directly used with temperature and system mode state.

Abstract: A cartridge for operatively housing a recording/playback medium comprising a first spool and a second spool located at offset positions inside a cartridge shell body; a recording/playback medium of a fixed width and length wound around the first and second spools; and a plurality of slant tape guides positioned between the first and second spools for guiding the recording/playback medium and for creating a helical scan tape wrap angle in connection with a plurality of main tape guides, the plurality of main tape guides being positioned between the first and second spools. The cartridge shell body comprises a plurality of pull out arm assemblies serving as enclosure doors for a bottom surface of the cartridge shell body, the pull out arm assemblies further serving as semicircular side walls of the cartridge shell body; a top plate; and opposing end plates formed perpendicular to the pull out arm assemblies and the top plate.

Abstract: A recording/playback recording medium comprising an elongated, flexible recording/playback medium having a predetermined width and a predetermined length, together defining a recording/playback area capable of providing a plurality of elongated recording/playback tracks; and information located on at least two tracks, a first track being recorded from the beginning of the first track in a first direction until the track is filled, a second track being recorded in a second opposite direction, the tracks being partitioned to define sectors having identifiable locations, the first, second, and subsequent tracks if necessary being recorded in a serpentine manner, the information recorded on the tracks being recorded by a helical scan.

Abstract: A recording/playback recording medium comprising an elongated, flexible recording/playback medium having a predetermined width and a predetermined length, together defining a recording/playback area capable of providing a plurality of elongated recording/playback tracks; and information located on at least two tracks, a first track being recorded from the beginning of the first track in a first direction until the track is filled, a second track being recorded in a second opposite direction, the tracks being partitioned to define sectors having identifiable locations, the first, second, and subsequent tracks if necessary being recorded in a serpentine manner, the information recorded on the tracks being recorded by a helical scan.

Abstract: A cartridge for operatively housing a recording/playback medium comprising a first spool and a second spool located at offset positions inside a cartridge shell body; a recording/playback medium of a fixed width and length wound around the first and second spools; and a plurality of slant tape guides positioned between the first and second spools for guiding the recording/playback medium and for creating a helical scan tape wrap angle in connection with a plurality of main tape guides, the plurality of main tape guides being positioned between the first and second spools. The cartridge shell body comprises a plurality of pull out arm assemblies serving as enclosure doors for a bottom surface of the cartridge shell body, the pull out arm assemblies further serving as semicircular side walls of the cartridge shell body; a top plate; and opposing end plates formed perpendicular to the pull out arm assemblies and the top plate.

Abstract: An apparatus for helical scan recording/playback of preselected tacks on a flexible tape medium comprising a linear slide structure capable of movement transversely relative to a longitudinal direction of the tape medium, the linear slide structure including a scanner/drum capable of sliding movement relative to a longitudinal direction of the tape medium between opposed edges of the tape medium defining a recording area, the scanner/drum having a head stack for helical scan recording/playback of the preselected tracks, and a stepper motor on a trolley end of the linear slide structure for causing the scanner/drum to slide transversely relative to the longitudinal direction of the tape medium.