Xylem 19 001 200 R2 SILENT STORM VFD Pumping System User Manual
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HIGH DISCHARGE PRESSURE FAULT
Cause
Cure
High system pressure setting too low.
Press F1, F8, F11 and verify n70:0 is set to 60 seconds.
System pressure transducer reading high.
Compare display readout to the pressure gauge.
Calibrate if possible, and replace transducer if necessary
(FlowNet).
Isolation valve for DSR or main discharge is
closed.
Open the valve.
DSR will not open fully.
The pilot valve is set too low. Adjust as necessary,
15 PSI over set pressure.
The needle valve on the DSR is too far open; adjust as
necessary.
The ball valve(s) at the inlet and/or cover tapping(s)
closed. Open the valves.
The indicating stem is bent and/or sticking.
Irrigation demand is reducing too quickly.
Reprogram irrigation to stage down in steps.
LOW LEVEL FAULT
Cause
Cure
Clogged or shut off supply pipe.
Check the supply pipe for restrictions or closed valve.
Clogged inlet screen.
Check and clean the inlet screen.
Problem with level probes.
Inspect probes for correct insertion depth.
Look for dirty or corroded probes.
To be performed by a qualified person only.
Look for broken probes, probe holder, or wires.
To be performed by a qualified person only.
Check for loose or incorrect probe wiring.
To be performed by a qualified person only.
Verify ground continuity between the station and wet
well.
Level relay failure (inside control panel).
To be performed by a qualified person only.
Check relay for proper operation. Replace as required.
LOW INLET PRESSURE FAULT
Cause
Cure
Normally used on flooded suction horizontal or canned turbine stations
Inlet pressure switch is set too high.
To be performed by a qualified person only.
Check the pressure switch setting.
(Located on lower left side of outside of enclosure.)
Pressure sensing line to pressure switch is clogged
or valved off.
Ensure the valve is open, and blow out line if
necessary.
Pressure is actually low – static.
If the city supplied water, check with them.
If the water is supplied by a tank, check the tank level,