On (b)(6) 2012, the maquet technician reported an out of box failure for cardiohelp (serial number (b)(4)) at (b)(6).According to the technician, while performing the battery calibration the unit failed the battery calibration.The battery calibration was performed again and passed.However, the self-test failure report displayed "digital io" message.There was no patient involvement.(b)(4).
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(b)(4).On 12/18/2012, correspondence was sent to the sales and service unit (ssu) regarding this complaint event.Per correspondence, this failure is related to the rotary knob.If the error is reproducible, check the rotary knob or change the human machine interface (hmi).(b)(4).
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