Xylem IM131R01 AQUAVAR AV II - Manual (Page 67)

Pump Sequence
This screen is located in the Sequence Control Submenu and displays the address and status of
the pump as follows:
AdrX * Pump address 1-4 is displayed as assigned by the operator during system set up. If
the * is displayed, this is the address for this pump.
hold Px The pump is off and the pressure/flow regulator is working.
run Px The pump is running and the pressure/flow regulator is working.
stop Px The pump is stopped and the pressure/flow regulator for this pump is blocked.
disabled The AQUAVAR II controller is not ready to start (Autostart on the main menu is off).
error
There is a fault in the AQUAVAR II controller operation. This will be identified in the
error displays (see pages 67-68).
fault There is a problem with communication to other pumps via the RS-485 connection.
detected Communication with other pumps via the RS-485 connection is enabled.
Bus ARBIT
The Data Bus Diagnostic display is a warning which shows the number of attempts used by the
RS-485 interface to synchronize the pump controllers in the system. In a multiple pump system,
each AQUAVAR II controller must be set to the same operating parameters. If this is not the case, or
if there is some mechanical or electrical block to the signal, the display will indicate a fault. To
clear the display, unplug the AQUAVAR II controller for about one minute.
Pump - Address
If only one unit is used the proper setting is “OFF”. If 2 through 4 units are installed, each pump
must be assigned a unique address number.
ADC Reference
This setting tells the unit where to look for the actual value signal. Set to “LOCAL” if the actual
value is obtained from a 4-20mA transmitter wired to the unit’s actual value input terminals (X1:
2, 3). Set to “REMOTE” if the actual value is obtained from the RS-485 port via a remote device.
Frequency Lifting
Allows modification of the required pressure to accommodate for system frictional losses due to
increased flow. Enter the speed at which system losses are a concern and compensation should
begin to be added to the required pressure. Typical settings are 40 HZ for a 60 HZ motor and 30
HZ for a 50 HZ motor. See section III for more information.
Lift Intensity
Enter a value for increasing the required pressure due to frictional losses once the frequency lifting
speed is exceeded. Calculate the pressure drop due to frictional losses and divide by the required
pressure and input this value as a percentage. Enter 0% if frictional losses are of no concern.
Reference
This display is located in the RS-485 Submenu and shows whether control is being received from
the local ADC (Analog/Digital Converter) or from another source shown as “SIO” via the RS-485
interface.
66
Operator Custom Features and Displays