This companion 2 driver was not supporting a patient.The customer reported that the companion 2 driver had displayed an "emergency battery error alarm" when the clinical staff tried to perform a system check.The error was displayed before and after the system check.The driver was turned completely off and on and continued to display the error.This alleged failure mode poses a low risk to a patient because the issue was observed when the companion 2 driver was not supporting a patient.In addition, this alleged failure mode would not prevent the companion 2 driver from performing its life-sustaining functions.The companion 2 driver has redundant, alternate power sources of external wall power and external batteries.An investigation will be conducted by syncardia and the results will be provided in a supplemental mdr.
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