Auto-Zone Control Systems Auto-Zone CV-C Controller Installation Guide (Version 01A) - Manual (Page 36)

Section 2 Auto-Zone CV-C
2-26 Sequence of Operation
Alarm Detection & Alarm Detection & Alarm Detection & Alarm Detection &
Reporting
Reporting Reporting Reporting
The CVC continuously performs self diagnostics during normal operations to determine
if any operating failures have occurred. These failures can be reported to the user in
several ways, depending on the options installed by the user. If you are using the
ZoneView AZ computer software to interface with the unit, you can enable or disable
each alarm condition as desired to prevent nuisance alarms from being reported. This
alarm disabling does not apply to the System Manager alarm polling described below, it
is only from remote alarm callout.
The System Manager continuously polls all installed controllers for alarm conditions. If it
detects any alarm, the ALARM LED on the right side of the front panel illuminates and
latches, even though the alarm may have gone away on the controller. This latching
mechanism allows the user to detect intermittent alarm conditions and begin closer
monitoring of the offending controller to determine what caused the alarm condition.
There is keypad access to retrieve the Loop and Board Addresses of the units in alarm.
On Auto-Zone systems equipped with the Remote Communications option (OE361-04-S)
the ZoneView AZ program can display alarm conditions on each Status Screen as the
user scrolls through the controllers on their system. The CommLink II Communications
Interface can also place a call to a Pager number for on the spot notification of alarm
conditions.
Alarm conditions are not latched in the controller generating the alarm. They can come
and go as the condition is corrected. Alarms are latched at the System Manager so a
record of the alarm is not lost.
Possible Alarm Conditions
Bad Space Sensor
If the space sensor is missing or has been shorted out for more than 10
seconds, an alarm is generated.