Why must cabin crew be knowledgeable about potential CACS malfunctions?

Cabin crew must be knowledgeable about potential malfunctions of the Cabin Atmosphere Control System (CACS) because this system is crucial for maintaining a safe and comfortable environment for both passengers and crew. In case of a malfunction, such as a loss of cabin pressure or failure to regulate temperature, understanding the warning signs and the appropriate actions to take can significantly enhance the crew's preparedness to handle emergencies effectively. This knowledge enables the cabin crew to ensure passenger safety and comfort, assist in emergency procedures, and mitigate any potential risks that could arise from the system's failure. Proficiency in dealing with CACS malfunctions allows the crew to act swiftly and competently, which is vital in maintaining an effective response during critical situations.