Table of Contents
Advertisement
E² Controller
remaining sensors to replace the input value of the failed
sensor. If all the temperature sensors fail, the controller
develops the control outputs based on the entered
temperature setpoint value minus a 3°F temperature offset.
This allows the CyberRow system to continue operating while
the cause of the problem is corrected.
The controller continually monitors fan operation. CyberRow
CRS-042 and CRS-084 units are equipped with a pneumatic
air proving system connected to a flow switch that detects the
loss of airflow when a fan fails to operate.
If one of the fans fails to operate, the controller alerts the
operator with an alarm message and increases the speed of
the remaining two fans to 99.9% to compensate for the loss of
air flow. If the fault does not clear, the fans shut down for 5
seconds and then restart. If the fault continues, the fans reset
a second time. If the fault does not clear after the second reset
the fan(s) which generated the fault are shut down and the
remaining fans continue operation at 99.9% speed.
In the event of a BMS monitoring/control signal failure, the E²
controller will default to local operation at the current setpoints
for the fans. The local sensors have priority over the BMS
system.
Manual Speed Control
The controller continually controls the speed of each fan to
values manually entered in the system controller
Control>Set>Fan Control menu loop
p.
42) without regard to the temperature setpoint.
Remote On/Off
For Remote On/Off operation, terminal positions are provided
to connect a remotely located, On/Off switching control device.
If the A/C unit is turned on and the E² controller receives a
remote input signal to turn off the A/C unit, the controller
disables all control outputs and a message Off by Remote
Shutdown appears in the main display screen. The A/C system
will automatically be reenabled when the remote On/Off signal
calls for the A/C unit to turn back on.
The control device may be an On/Off switch, thermostat or a
humidistat. If customer provided, the remote On/Off control
contacts must be sized appropriately. The Remote On/Off
contacts must have a minimal rating of 24 VAC. Refer to the
electrical drawing included with the A/C unit for the electrical
specifications and for wiring details.
Menu Screens
Main Menu
MAIN MENU
Factory
INFO
Alarm Log
36
("Setpoint Screens,"
The Main Menu is accessed from the Main screen by pressing
the Prg key. The Main Menu screen provides a complete listing
of the menu loops that are available. You may scroll through
the menu categories using the Up and Down arrow keys. From
the Main Menu screen you may select from among the
following standard menus:
Info - Displays basic read-only status information. Allows you
to monitor system operational parameters. No password is
required at this level.
Alarm Log - Displays all alarms and power-ups in sequential
order with a time and date stamp. No password is required at
this level.
Control - Allows modification of basic control parameters such
as setpoints and clock. Level 1 password is required to enter
this menu.
Service - Allows modification of advanced control parameters
such as offsets, blower speed, BMS set up and permits the
user to save customer parameters and reset the controller to
the customer or factory default values. Level 2 password is
required to enter this menu.
Factory - Allows modification of more advanced control
parameters such as sensor scaling, start-up delays and
grouping parameters. Level 3 password is needed to enter this
menu. Entry to the Factory menu is intended for qualified
technicians working under the guidance of vendor Product
Support during start-up and commissioning of the A/C system.
The password to enter this menu may be obtained by
contacting Product Support (see
Information Menu Loop
The Info menu screens may be accessed from the Main screen
by simply scrolling with the Up and Down arrow keys. The
same screens may also be viewed if you enter the Info menu
by pressing the Prg key. The Info menu displays screens that
provide current temperature and relative humidity conditions
and shows the modes the A/C system is currently operating.
There are no adjustable parameters in this loop. From the Info
loop you may view the following display screens as they apply
to the unit configuration:
MAIN MENU
Factory
INFO
Alarm Log
Operating Conditions
The first Info screen displays the current Date, Time and
provides State of Operation icons.
The actual control temperature (°F) and relative Humidity (rh)
is always displayed and dewpoint (Dp) will appear as derived
from the control T/H sensor selection. The values displayed
are used by the controller to develop control output signals for
managing system operations.
"Product Support," p.
69).
AH-SVX015A-EN
Advertisement
Table of Contents
Troubleshooting
