What was found
(CAN) STALL PROTECT FAIL AMBER CAS ILLUMINATED - DURING TAKEOFF ROLL AT AN INDICATED AIRSPEED OF 65 KNOTS WE GOT AN AMBER STALL PROTECTION FAIL CAS MESSAGE WITH A MASTER CAUTION. WE ABORTED THE TAKEOFF AND AS WE SLOWED WE RECEIVED AN AMBER CAS FOR RUDDER LIMITER FAIL. AS WE CLEARED THE RUNWAY ALL MESSAGES CLEARED AND A CYAN CAS MESSAGE FOR RUDDER LIMITER FAULT DISPLAYED. REVIEWING THE DOWNLOADS CONFIRMED THAT THERE WAS AS STANDBY ISI AND MACH DISAGREE/MISCOMPARE THAT CAUSED THE STALL WARNING FAULT AND THEN THE RUDDER LIMITER FAULT. THIS IS TYPICALLY DUE TO CONTAMINATION IN THE STANDBY PITOT SYSTEM. NEED TO DO A PURGE OF THE STANDBY PITOT SYSTEM AND CHECK THE MOISTURE TRAPS FOR ANY CONTAMINATION. ALSO AFTER ALL THAT IS COMPLETE PERFORM THE STALL WARNING/RUDDER LIMITER TEST. ALL THIS PERFORMED. AIRCRAFT RETURN TO SERVICE. (TC# 20190805001)