A CRJ700's CAS alerted a red L COWL A/I DUCT warning. The engine was shut down; an emergency declared and the flight diverted to a nearby airport after the checklist procedures failed to control the pneumatic system.

Narrative

I was First Officer (Pilot Flying); climbing through FL320 in IMC with the Cowl Anti-ice on. We received a triple chime red warning message 'Left Cowl Anti-ice Duct.' Followed checklist procedures in AOM. After selecting the non affected side; and message still persisting; (we ran through the checklist again) and continued to comply with AOM checklist to shut affected engine down. After notifying ATC for a leveloff at FL330; we declared an emergency. We complied with Left Engine Shutdown checklist; diverted and landed at nearest suitable airport. Myself and the Captain decided on the nearest suitable. The Captain decided to take duties as Pilot Flying; and I requested Runway 17R; their longest runway. We complied with landing data and checklists for single engine approach and landing; advised flight attendants and passengers; and had Crash Fire Rescue waiting for us on the ground. At no time did we execute an emergency descent. After executing single engine landing; we advised ATC that no further assistance would be required.