MX5108n always reload

Hi .. Everyone

I have a problem with the both switches MX5108n-A1 & A2 that installed on MX7000 chassis, the issue is each switch restart every 10 minutes.
When I ran the command "show logging log-file", appeared this message "User request to reload system Warm reload system", and no one request a reload of the both switches at all. !!

Please any ideas about the issue