Beacon II provides a set of dry contacts for use in signaling an alarm. These contacts can be connected to a light, a buzzer, a bell etc., which will be activated when an alarm condition occurs. When the Beacon II is energized, the alarm contacts are OPENED. When an alarm condition is detected, the contacts are CLOSED. Conditions under which the alarm contacts will close are:

• R1 High Box Temperature – LED Display: A1 - Room temperature has exceeded the Alarm High ALH value for the Alarm time ALT programmed.

• R2 Low Box Temperature - LED Display: A2 - Room temperature has dropped below the Alarm Low ALL value for the Alarm time ALT programmed

• R3 System Start-up failure - LED Display: A3 - Compressor pumps down and tries to restart after 4 minutes. After 4 unsuccessful attempts to restart, the alarm code A3 is displayed. System continues trying to restart.

• R4 Input Fault – LED Display: A4 - Box Temp., Suction Temp., Pressure Transducer open or not installed.

• Power failure – Loss of power to the Evaporator

Clearing Alarms

Alarms A1 – High Box Temperature and A2 – Low Box Temperature will clear automatically if the Box Temperature decreases or increases to below or above the Alarm setpoint temperature. Placing the system in the "SERVICE MODE" or turning off power will clear the A3 Alarm. Replacing the Room Sensor, Suction Sensor or Pressure Transducer will clear the A4 Alarm.