COND MIXER FLOW REGUL FAULT 警告的触发条件是混合组件压力过高或者过低，但是程序都是要求将 AIR FLOW 设置到 HI 位。对于压力过高就不能理解了。空客在第二次回复的时候确认了程序存在问题，后续会修改。具体参考 TechRequest 原文：
Q: COND MIXER FLOW REGUL FAULT
The triggering condition is "The air pressure in the mixer unit is too high, or too low". Why the procedure is only set AIR FLOW to HI regardless of pressure too high or too low?
A:
Due to the fact the flight crew will not be able to distinguish between mixer pressures too high or too low, the procedure is applicable for both cases. The too low mixer pressure is usually caused by excessive leakage in the air distribution system (e.g. duct or mixer rupture). This leakage is compensated by increasing the mixer inflow, selecting AIR FLOW to HI. Nevertheless the additional flow may not be sufficient to fully compensate the leakage.
Q_2:
I can understand the reson for setting HI in case of pressure too low. However if the pressure is too high, will setting HI aggravate the situation instead of mitigaitng it?
A_2:
Airbus would like to thank you for your remark.
We confirm that when the mixer pressure is high there is no procedure to apply. Airbus will revise the procedure for COND MIXER FLOW REGUL FAULT in A350 FCOM to clarify the condition.