B737 single pack high flow rate
I have a small uncertainty about the single pack ops to high air flow. The FCOM says that with one pack not operating, the other pack will automatically switch to high air flow in flight with flaps up, while the QRH, i.e. engine failure or shutdown, requires to move the affected side pack switch to off to regulate the remaining pack to high air flow.
Of course, I would always follow the QRH, but I really want to be sure about the working of the system and if also the FCOM actually requires to move the inop pack switch to OFF. English isn't my first language and the word "automatically" might lead me to believe something not correct.