Group Information Menu Screens; Group Sensor Values; Group Alarms; Lead Controller Group Sensors - Black Box CRCW-12 User Manual

Chapter 4: E2 Controller

4.6.2.8 Group Information Menu Screens

The following display screens are available in the Information menu loop
(Section 4.5.2) if two or more units are wired together as a group. They
display key operating parameters for grouped A/C units.

4.6.2.8.1 Group Sensor Values

This displays the current group temperature and humidity control values
transmitted from the Lead controller. The field below displays the selected
control T/H sensor arrangement (lead, avg, min, max, local) depending upon
how the group is set up. See Service>Options screens, Section 4.6.2.7. The
last field shows the unit group address assigned to the controller within the
group and the address of the current lead controller.

4.6.2.8.2 Group Alarms

This screen only appears when the controller is wired with additional A/C
unit controllers. It displays bitmask values indicating the alarm conditions
that will initiate a group internal alarm causing the unit to switch over from
"Active" to "Unit Off." See Factory>Group (Group Alarm Setup) in Section
4.6.2.6.

4.6.2.8.3 Lead Controller Group Sensors

This screen appears only in the display of the controller that is designated as
the lead in a multi-unit workgroup. The lead controller polls the temperature
and humidity sensors from all the A/C units in the work group and displays
the averaged values. It also displays the value of the minimum (lowest)
temperature sensor and the value of the minimum humidity sensor in the
A/C group and, conversely, displays the value of the maximum (highest)
temperature sensor and maximum humidity sensor in the A/C group. The
fields at the bottom are the addresses of the controllers in the group that
have the min. (lowest) and max. (highest) temperature and humidity sensor
Figure 4-96. Group information menu screens.
readings.

4.6.2.8.4 Group Sensor Status

This screen appears only in the display of the controller that is designated as
the Lead in a multi-unit workgroup. It shows what sensors exist on each A/C
unit for the lead controller to perform the group sensor averaging
calculation. The numbers are the sums of index values assigned to the
sensors as shown in the following key:
1 = Supply Temperature Sensor
2 = Return Humidity Sensor
4 = Remote Supply Temperature Sensor
8 = Remote Supply Humidity Sensor
16 = Static Pressure Sensor
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