Xylem IM183 R09 3AB2 & 5AB2 Aquavar ABII Variable Speed Pump Controller - Manual (Page 11)

11
MANUAL RESET OF NO WATER/
LOSS OF PRIME FAULT
While setting up and testing the system it is convenient to
have a quick way to clear a No Water/Loss of Prime fault.
Pressing both pushbuttons while the controller has this fault
will clear it and resets the restart time to 1 min. Continuing
to hold the pushbuttons down for an additional 10s will
allow the pump to come up to speed and No Water/Loss of
Prime Power Calibration to occur. The pump is not allowed
to stop while any pushbuttons are held down.
NO WATER/LOSS OF PRIME RESTART TIME
After a No Water/Loss of Prime fault occurs, the controller
waits a period of time. This period of time can be chosen
to be fixed at 1 minute or increasing in length with each
occurrence of the fault. The factory default is for restart
time to increase each time this fault occurs. The controller
will “forget” one of these faults for every ½ hour of run
time. This allows the restart time to automatically shrink
once a No Water/Loss of Prime condition is resolved.
Manually resetting the fault by pressing both pushbuttons
will also clear the restart time back to 1 minute.
No Water/ Pushbutton
DIP Switch
Direction to
Loss of Prime to Hold
to Flip
Flip
Restart Time Down DIP Switch
Increasing
1/10/20/30/60 min.* Both Top
Left to Right
Fixed 1 min. Right to Left
* Factory Default
SIZE OF PRESSURE VARIATION FOR FLOW
DETECTION
The controller uses pressure variation to detect when flow
has stopped. The factory default is for the pressure to vary
+/– 2 PSI. The other choices available are +/– 1 PSI and
+/– 3 PSI. Ideally one would like the smallest pressure
variation while maintaining quick turn off when flow stops.
Too small of a variation may result in the controller not
turning off and/or turning off when it shouldn't. If either
of these problems occur, increasing the pressure variation
should solve the problem. Ensuring the tank has the correct
pre-charge pressure setting and having a spring check valve
on the pump side of the tank and pressure transducer will
provide most reliable turn off performance and allow the
smallest pressure variation setting.
Pushbutton
DIP Switch
Direction to
Pressure Variation to Hold
to Flip
Flip
Down DIP Switch
1 PSI
Top 2nd
Right to Left
2 PSI*
from Top
Left to Right
3 PSI Bottom Left to Right
* Factory Default