As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 3002 - PIT-BWI - WHILE IN CRUISE FLIGHT AT FL230, THE FUEL IMBALANCE LIGHT APPEARED AND THE LEFT FUEL TANK INDICATED 0 POUNDS. COMPLETED QRH CHECKLIST FOR FUEL IMBALANCE, DECLARED AN EMERGENCY WITH ATC. LANDED IN BWI WITHOUT INCIDENT. REMOVED AND REPLACED FUEL CONDITIONING UNIT IAW EMB 145 MM 28-41-01. OPS CHECK GOOD IAW MM 28-41-00.