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Saving and Restoring Setpoint Parameters
Upon initial start-up the A/C system operates using the
setpoints programmed by the factory (primary setpoints) as the
operating setpoints. As described in
p.
32, the customer may enter new operating parameters in the
Control menu anytime and the system will then operate
accordingly. The customer may store the new setpoints in the
Service menu if it is intended to save them. Once stored, the
Customer setpoints now become the operating setpoints. The
primary setpoints entered by the factory still remain stored in
the controllers memory as the Factory setpoints.
At any time, setpoints for the system may be re-adjusted to any
value and the system will operate accordingly. If it becomes
necessary however, the customer may enter the Service menu
and restore the setpoints to the stored Customer operating
setpoint values. The original Factory (primary) setpoint values
may also be restored from the Service menu. Whichever
setpoints are restored (Factory or Customer), become the
current operating setpoints.
Alarms
As programmed into the system controller, an alarm condition
activates the summary alarm logic which illuminates the alarm
key and energizes an audible alarm. Some alarms are
programmed by the factory to automatically shut down the A/
C unit until the alarm condition is remedied and the alarm is
cleared by pressing the alarm key. Some of the alarms that
may be enabled by the factory are listed in
p.
39.
Summary Alarm
A summary alarm will activate when the controller senses any
programmed alarm condition. This illuminates the alarm key
and if the option is selected, a N.O./N.C. summary alarm
contact may be energized for remote monitoring of alarm
conditions. If certain critical summary alarm conditions are
detected, they will cause the A/C unit to shutdown.
Customer Alarms
A customer provided digital (on/off switching) alarm sensor
may be connected to terminals provided in the electric box.
This alarm input may be for any site specific alarm condition
the user wishes to monitor that may or may not be provided in
the standard controller alarms menu; i.e. Gas Detection,
Intrusion Alarm, etc. Upon detection of a customer alarm, the
controller will activate the summary alarm contact and display
a screen mes- sage indicating a customer alarm message. The
screen message Customer Alarm 1 (default) will appear in the
controller display or the user may reconfigure the controller to
display any alpha-numeric message desired, up to 20
characters long, in the Service>Options>Custom menu loop
(see
"Customer Alarm Input (Optional)," p.
Custom Alarms
A custom (user configured) alarm is activated upon detection
of one or more programmed alarm conditions as set by the
operator in the Service>Options>Custom menu loop (see
AH-SVX015A-EN
"Setpoint Adjustment,"
"Alarm Log Menu,"
46).
"Custom Alarm Setup (Optional)," p.
alarm condition is detected, a summary alarm is signaled and
a designated set of N.O. and N.C. Custom Alarm relay contacts
may be energized to provide remote indication of the specific
alarm condition(s).
For example you may want to be notified when a change filter
alarm is annunciated, giving notice that the air filters need to be
cleaned or replaced. That way you are alerted before the filters
are so badly clogged that airflow is reduced to a point where a
Loss of airflow alarm is activated.
Controller operation
The E² Series controller is designed to control an air
conditioning system in a space or process application to
temperature and humidity levels as defined by the user.
Conditioned air is supplied to the space as needed to maintain
the temperature/humidity control setpoints.
The controller I/O module includes inputs and outputs as
depicted in
Figure 20, p.
34. Not all the inputs and outputs
shown below are utilized, therefore, only the inputs/outputs
required for the specific A/C system type and application are
enabled.
E² Controller
46). When a custom
33
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Troubleshooting
