There is a set of lamps at the right hand end of the console which indicate major changes of status or alarms. Alarms are of various types but upon no account should any be ignored. You will be unable to ignore an alarm anyway since when an alarm occurs and puts on the warning light the system trips a relay which sounds a high pitched, loud and very irritating whistle. You may cancel this by pressing the button marked "CANCEL". The alarm will remain lit but the noise will cease. Just to confuse you there is another whistle of similar pitch which comes from the Interval Timer. You can stop the noise from this by pressing the yellow button marked " RESET " on the timer panel.