FLC OF ACR MLG ACFT EXPERIENCED A MULTI MASTER WARNING OF AN ENG PROBLEM RIGHT AFTER TKOF AND RETURNED TO LAND.

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ON DEP FROM 27R AT PHL PASSING 2000 FT RECEIVED MULTIPLE WARNINGS/ALERTS FROM MFDU (MULTI-FUNCTION DISPLAY) MFDU INOP. TGT OVERLIMIT #2 ENG; N1 OVERSPD #2 ENG; LIGHT ON START LEVER #2. MASTER WARNING TRIPLE CHIME ALERT. THE PRIMARY MFDU DISPLAYING ENG PARAMETERS WERE IN LIMITS AT ALL TIMES (WOULD CHANGE COLOR ON TAPE DISPLAY IF OUT OF LIMITS). I ALSO DISENGAGED AUTOTHROTTLES AND PULLED ENG #2 TO IDLE TO SEE IF THIS WOULD CHANGE ANYTHING AND IT DID NOT. THE WARNINGS/ALERTS DISPLAY WAS CONTINUOUSLY INTERMITTENT WHITE/RED (WHITE BEING -- CONDITION NO LONGER EXISTS). I REQUESTED A RETURN TO FIELD FROM DEP AND WE MADE AN UNEVENTFUL LNDG AND SECURED ENG AFTER CLRING RWY. I NEVER SHUT DOWN #2 ENG AS I FELT THIS WAS A WARNING COMPUTER FAULT NOT AN ACTUAL EXCEEDANCE. NO EMER WAS DECLARED. ONE PROBLEM WITH THIS SITUATION WAS A TRIPLE CHIME ALERT (HIGHEST ALERT CONDITION) WHICH COULD NOT BE SELECTED WITHOUT SHUTTING DOWN THE ENG. I DID HAVE TO SECURE THE MASTER AUDIO WARNING (SECURING ALL AUDIO ALERTS) IN ORDER TO SILENCE THE ALERT. I BELIEVE THAT THIS WAS A DESIGN FLAW IN THE ACFT. YOU SHOULD BE ABLE TO SECURE ANY ALERT AUDIO BY PRESSING ON THE MASTER WARNING LIGHT WHICH WOULD CONTINUE TO FLASH RED. THE AUDIO WAS VERY DISTRACTING.