Why hp and lp alarms comes in pac in HVAC system?

In HVAC systems, high-pressure (HP) and low-pressure (LP) alarms in a Programmable Automation Controller (PAC) are critical for ensuring safe and efficient operation. HP alarms typically indicate potential system overpressure, which can lead to equipment damage or failure, while LP alarms signal insufficient pressure that may disrupt system performance. Both types of alarms help maintain optimal operating conditions, prevent system failures, and ensure safety by alerting operators to potential issues before they escalate.