TC reported smoke internal at FM2. Staff(ALJ) checked and feedback no sign of smoke or heat. ~~~~~ Checked and found FC720 smoke internal alarm. Resettable. Fault unable to duplicate. Checked fire alarm panel for signs of water ingress - none. Panels checked - no signs of burns or smoke. L  checked working and did not have burning smell. Checked brake shoe condition ok. Underframe check ok. Cleaned smoke internal sensor with compress air. Further monitored for 2 hours - no fault occurred. N.A/fairuz/faizal/arun/16.06.22