As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#2230, MKE-BOS. (AIRCRAFT WAS DIVERTED TO ORD) CLIMBING THROUGH FL270 AFTER ENCOUNTERING ICE "WING A/ICE FAIL" CAUTION APPEARED ON EICAS. R WAIV SHOWED FAILED OPEN ON AIR SYNOPTIC PAGE; ACCOMPLISHED EFIM FAULT CODE 3012F0015 - RESET FAULT. ACCOMPLISHED FUNCTION TEST . REF BD500-A-J30-12-00-01AAA-340A-A . ALL CK GOOD.