Power is returned by turning off the main breaker switch, waiting 20 to 30 seconds, and then turning on the main breaker switch. The system runs a routine that polls the ENVM for voltage and temperature readings. The system obtains these statistics from the ENVM at a rate of once a minute and stores them in a buffer. You can display the contents of this buffer with the show environment command. The resulting display contains the current intake and exhaust air temperatures, shutdown thresholds, and voltage measurements of DC lines.
Air flow appears good.
If a measurement exceeds desired margins, but has not exceeded fatal margins, a warning message is printed to the system console. The system software queries the ENVM for measurements once a minute, but warnings for a given test point are printed to the screen at most once every four hours. If a measurement exceeds the desired margins at any time within a four-hour period, an automatic warning message appears on the console screen. As noted, the user may query the ENVM using the show environment command at any time to determine if a measurement is at the warning level. The system software is interrupted, and a shutdown message is displayed on the console screen.