Narrative:

After starting engines; bleed 1 off and bleed 2 off advisory messages were illuminated on EICAS (engine indicating and crew alerting system). The PIC and I acknowledged them; looked them up in the QRH; and discovered the uninformative 'crew awareness' line associated with them. We continued with the after start checklists and taxied to the runway. During my before takeoff flow; I noted the continued presence of the two messages on the EICAS; but did not consider them significant; as the aom (aircraft operating manual) only instructs pilots to consider yellow and red messages during the right pilot before takeoff flow. After takeoff; it became immediately evident that the airplane was not pressurizing properly. Further; upon activation; the anti-ice system was indicating inhibited when it should not have been. On the ecs (environmental control system) synoptic page; we noted that both prsov (pressure regulating shutoff valve) valves were white and indicating off or closed (no green line extending past the valve icon and the line in the valve icon perpendicular to the bleed air flow line).the PIC contacted the company and we arranged a diversion to ZZZ; where a suitable recovery could be made for our passengers. The flight progressed uneventfully; though unpressurized at 6;000 feet until our descent into ZZZ. As I began descending; a loud; vibratory swishing sound filled the entire airplane. It seemed constant no matter descent rate or airspeed. As we leveled at about 4;000 feet; the noise slowly faded away. It reminded me of the sounds that usually accompany a lavatory fill cap that has come loose; but a little bit louder and with a severe pressure bump in the ears.the QRH concerning white advisory messages in the phenom is extremely uninformative and unhelpful. In any other airplane I have ever flown; advisory messages in the QRH are at least accompanied by a few things to consider or some explanation as to what is likely occurring within the given system. While it may be obvious that a bleed off message means that the bleed is off; this is not an entirely abnormal condition in the phenom. Often; due to the air conditioning system on the ground; bleed 1 and bleed 2 cycle on and off automatically during ground operations. I have checked the EICAS many times during my before takeoff flow and noted bleed off messages and thought nothing of them; as the prsovs always open and begin pressurizing the airplane and providing other bleed systems shortly after takeoff. The aom normal before takeoff procedures prohibit a takeoff with yellow or red messages displayed on the EICAS unless associated with a known inoperative component; but this section says nothing about white messages or what to do if they are displayed.even the MEL manual for bleed off says vaguely; 'not applicable'(?). No dispatch conditions; no MEL procedure.three of the most important reference manuals indicate that everything is fine with the bleed system when very clearly everything is not fine. I wish that I could better explain the likely cause of this event; but I am still unsure of exactly why the system behaved as it did. With bleed switches in the automatic position; the system logic should have been controlling the bleed valves; but in this instance; it failed to do so.

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Original NASA ASRS Text

Title: EMB-505 First Officer reported unable to pressurize aircraft after takeoff; forcing flight to divert. Pilot also indicated that the QRH was of little help.

Narrative: After starting engines; BLEED 1 OFF and BLEED 2 OFF advisory messages were illuminated on EICAS (Engine Indicating and Crew Alerting System). The PIC and I acknowledged them; looked them up in the QRH; and discovered the uninformative 'Crew Awareness' line associated with them. We continued with the after start checklists and taxied to the runway. During my Before Takeoff flow; I noted the continued presence of the two messages on the EICAS; but did not consider them significant; as the AOM (Aircraft Operating Manual) only instructs pilots to consider yellow and red messages during the Right Pilot Before Takeoff flow. After takeoff; it became immediately evident that the airplane was not pressurizing properly. Further; upon activation; the anti-ice system was indicating inhibited when it should not have been. On the ECS (Environmental Control System) synoptic page; we noted that both PRSOV (Pressure regulating Shutoff Valve) valves were white and indicating OFF or CLOSED (no green line extending past the valve icon and the line in the valve icon perpendicular to the bleed air flow line).The PIC contacted the company and we arranged a diversion to ZZZ; where a suitable recovery could be made for our passengers. The flight progressed uneventfully; though unpressurized at 6;000 feet until our descent into ZZZ. As I began descending; a loud; vibratory swishing sound filled the entire airplane. It seemed constant no matter descent rate or airspeed. As we leveled at about 4;000 feet; the noise slowly faded away. It reminded me of the sounds that usually accompany a lavatory fill cap that has come loose; but a little bit louder and with a severe pressure bump in the ears.The QRH concerning white advisory messages in the Phenom is extremely uninformative and unhelpful. In any other airplane I have ever flown; advisory messages in the QRH are at least accompanied by a few things to consider or some explanation as to what is likely occurring within the given system. While it may be obvious that a BLEED OFF message means that the BLEED is off; this is not an entirely abnormal condition in the Phenom. Often; due to the air conditioning system on the ground; BLEED 1 and BLEED 2 cycle on and off automatically during ground operations. I have checked the EICAS many times during my Before Takeoff flow and noted BLEED OFF messages and thought nothing of them; as the PRSOVs always open and begin pressurizing the airplane and providing other bleed systems shortly after takeoff. The AOM normal Before Takeoff procedures prohibit a takeoff with yellow or red messages displayed on the EICAS unless associated with a known inoperative component; but this section says nothing about white messages or what to do if they are displayed.Even the MEL manual for BLEED OFF says vaguely; 'Not Applicable'(?). No dispatch conditions; no MEL procedure.Three of the most important reference manuals indicate that everything is fine with the BLEED system when very clearly everything is not fine. I wish that I could better explain the likely cause of this event; but I am still unsure of exactly why the system behaved as it did. With BLEED switches in the AUTO position; the system logic should have been controlling the BLEED valves; but in this instance; it failed to do so.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.