Hi Marilynn and welcome to JustAnswer,Thank you for the question and your patience. Should you still need assistance for information purposes only...Initially and on "...get that replaced...", please click HERE to consider.
Still, it would appear that the SU-Z990 is kicking in auto-protect mode. Proposed preliminary tries (if have not been done):
For repairs, please call / inquire from 1-800-211-PANA (7262)