I've fixed the link to the article above and I'll include it here
http://kb.juniper.net/InfoCenter/index?page=content&id=KB7726
This seems to indicate these messages are repeated when this setting is not correct.
I also note that the series of message seem to repeat, so I am not convinced the issue is cleared. But I could be wrong. Perhaps manually clearing the alarm will keep the alarm light off and all is well.
clear cluster led alarm
http://kb.juniper.net/InfoCenter/index?page=content&id=KB5394