Operator custom features and displays – Xylem IM043 AQUAVAR Variable Speed Pump Control User Manual
Page 60
Synchronous Limit
To deactivate synchronous control, set this value below 0 HZ. This will be the lowest speed that
multiple pumps will operate prior to switching off the last pump in sequence. For 60 Hz systems
using synchronous mode, this would normally be set to 40 Hz. This window is also used for the
stop value of a slave pump.
Synchronous Window
This is a frequency offset that increases the synchronous limit that each lag pump is stopped at.
This allows the minimum speed to be increased for each lag pump. For example, if the synchro-
nous limit were set for 40 Hz and the synchronous window is set for 50 Hz. Pump 3 shuts off at
45 Hz and pump 2 shuts off at 40 Hz.
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 controller is not ready to start (Autostart on the main menu is off).
error
There is a fault in the AQUAVAR 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
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 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 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. Used in multi-pump programming to address each
AQUAVAR.
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Operator Custom Features and Displays