EMB-505 / Phenom 300
Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Landed in Emergency Condition; Flight Crew Landed As Precaution; Flight Crew Diverted
Aircraft; Manuals
We were starting to level at FL360 when the Cass announced 'Duct 2 Overtemp'. Following the checklist required us to go to ECS 1. Then we got 'Duct 1 Overtemp'. You could deduct that there is a possibility of fire.  We have later discovered that it may have been a Ram Air Mixing Valve error that could have caused both to show failure indications.  When this happens it becomes extremely hot in the cockpit (130 degrees estimated) because you cannot control the temperature any longer. We landed without incident and when I reached 11000 ft I turned off both bleed valves which extinguished the annunciations at around 6000ft.I would suggest that at least a memo on dual duct failure could be devised ... I had a very good First Officer (FO) and we were able to keep cool during the event but this could lead to confusion as to whether we have a fire or not.
[Report Narrative Contained No Additional Information.]
EMB 505 flight crew reported an overheat warning for both ducts without a published procedure in the QRH to addressed the situation.