Nine aggregate sensors provide an overall status of particular aspects of the switch. Each aggregate sensor is the logical and summation of many binary sensor checks.
When all of the checks are true, the respective aggregate sensor’s value property is set to State Deasserted, and the alarm_status property is set to cleared. This situation means all binary sensors indicate that there are no faults.
When one of the binary sensor checks is false, a fault occurs, the value property becomes State Asserted, and the alarm_status property is set to major. That aspect of the switch is in an unhealthy state.