Xylem 19 001 251 R3 Floboy VFD Pumping System - Manual (Page 25)

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INDIVIDUAL PUMP FAULTS
Pump faults are usually caused by the thermal
overload tripping, or circuit fault that causes the
pump NOT to start when requested.
Overload Protection
Overload Protection is standard on all pump
stations. The overload is a safety device that shuts
the motor down when amperage exceeds the set
point of the device.
If the motor amperage exceeds the overload set
point that pump shuts down after a time delay.
This delay time is inversely proportional to the
overload amount. In some instances, an individual
pump can trip without shutting down the entire
system if another pump is available to operate. If
so, the controller will automatically bring the
available pump on line. The controller will indicate
a fault for the specific pump.
WARNING
: Overload Hazard
The overloads are located inside the control
panel. All safety procedures must be adhered
to during the any adjustment or resetting
process. Improper procedures or failure to
use proper safety procedures could result in
death or serious injury.
Resetting the overload is accomplished by
pushing in the blue Differential Overloads button
on the right front face of the device, and rotating it
approximately an eighth of a turn clockwise
(applies only to PM Pump).
Adjustment of the overload set point is performed
using the blue dial on the left front face of the
device.
Once the overload has been reset, individual
pump faults require turning the individual pump
switch to the OFF position, and then back ON (re-
arming).
High Pump Temperature (Optional)
High pump temperature utilizes a temperature
probe inserted into the pump discharge piping.
The probe trips when the water temperature
reaches 120°F, and then immediately shuts down
the pump. “PM Pump High Temp” or “Pump 1
High Temp” will show on the HMI.
The temperature probe automatically resets at
105°F. At that time, the pump can be re-armed,
and pump operation can continue.
NOTE: If the pump continues to shut down for this
issue, shut the station down and determine what
the problem is. Consult the Troubleshooting
section of this manual for assistance.
VFD Fault
The VFD sends a fault signal directly to the
controller. The display shows, "VFD Fault" and the
red station fault light comes on. To determine the
nature of the problem, you must use the VFD
keypad display and review the fault/alarm history.
This procedure is outlined in the VFD section of
this manual. A list of all inverter fault/alarm codes
is found in your VFD manual.
Once you have determined what the VFD
(inverter) fault is, and have cleared it, press the
station Reset button to clear the alarm shutdown
status.
NAVIGATING THE CONTROLS
OVERVIEW
The Floboy controller is a combined touch-screen
interface (HMI) and controller. The device
communicates with the VFD for pressure and flow
readings, inputs (pump switches, safety switches,
etc), and outputs (Fault light, PM Pump contactor,
etc).
All control decisions are made in the controller,
including PID control, pump start/stop decisions
and safeties. Settings for these decision
processes are available in the controller. There
are 6 keys to the right of the controller screen.
These are quick access keys that quickly allow
access to menus and are also provided special
functions in some screens. F5 is the “Reset
Control” and is used to reset system safeties.