As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE CLIMBING OUT WE NOTICED THE NO LIGHT ( NOSE GEAR GREEN LIGHT ) ILLUMINATED . WE RAN THE QRH AND DIVERTED TO MEM. REMOVED SUSPECTED FAULTY LANDING GEAR CONTROL UNIT PN 049801-001 SN L2104 AND INSTALLED REPAIRED LANDING GEAR CONTROL UNIT PN 049801-001 SN 0074 IAW CE-560XL AMM 32-30-01. OPS CHECK GOOD.