There are various reasons the Alarm light might come on. First to check, why you are seeing the alarm.
System Alarm Info
nish@iNET# run show system alarms 1 alarms currently active Alarm time Class Description 2013-11-02 01:09:17 GMT Minor Autorecovery information needs to be saved
In the above case, it is because Autorecovery information is not saved.
This is accomplished by doing the following command
Saving Autorecovery Info
nish@iNET> request system autorecovery state save Saving config recovery information Saving license recovery information Saving BSD label recovery information nish@iNET>