Regional Jet 700 ER/LR (CRJ700)
Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Critical; Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor
General Declared Emergency
Aircraft
[We had an] acrid smell from APU after landing [during] taxi. APU bleed open caution message. Crew followed QRH. At gate; momentary APU fire warning followed by APU self shut down. Crew followed QRH. APU fire indication ceased with no APU fire present. CFR called. CFR could find no evidence of a fire. Passengers were already deplaning when incident took place. Dispatch and Maintenance Control were notified.
CRJ-700 Captain reported acrid smell from APU after landing. At gate a momentary APU fire warning resulted in APU shutdown; but no fire found by CFR.