21
Alarm setup parameters
The following table provides information about the A5xx Controller’s alarms and their corresponding true
conditions.
Notes:
• Some of the following alarms are available only when the A5xx Controller uses the corresponding binary
input or feature. For example, the QREV/PSHC alarms are available only after you pair the A5xx Controller
with a QREV/PSHC.
• To make the door open, man-in-room, refrigerant leak, and emergency shutdown optional alarms available
and configurable in the alarm setup screens, select the optional alarm type in the universal input setup
screens.
Alarm actions
• Buzzer: If enabled, the buzzer energizes upon alarm.
• Alarm relay: The alarm relay energizes when any alarm condition is true. The alarm relay de-energizes
when you acknowledge the alarm locally or when the condition is no longer true.
• Alarm icon: The Alarm icon on the UI glows when any alarm condition is true or requires acknowledgment.
Table 13: Alarms and alarm true conditions
Alarms Alarm true condition
High
temperature
The temperature at Sn1 is greater than the defined high temperature alarm value for a period of time that
is equal to or greater than the alarm delay.
Low
temperature
The temperature at Sn1 is less than the defined low temperature alarm value for a period of time that is
equal to or greater than the alarm delay.
Sensor failure Sn1 is in a state of failure.
Sn2 is in a state of failure.
Door open The cold room door remains open for a period of time that is equal to or greater than the defined value.
Man-in-room An individual remains in the cold room for a period of time that is equal to or greater than the defined
value.
Refrigerant leak The refrigerant leak detector indicates a leak. This may be a defined voltage level.
QREV/PSHC A connected PSHC device triggers an alarm if either of the following states occur:
• The PSHC pressure moves out of range
• The PSHC internal temperature moves out of range
QREV/PSHC
comm loss
A connected PSHC device fails to respond to Modbus messages from the A525.
Emergency
shutdown
An individual inside the cold room flips a switch to generate an emergency shutdown.
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