Troubleshooting - FLOWTECH flowpress WMDA Operation And Maintenance Manual

Troubleshooting

If for any reason the pressurisation unit does not seem to be functioning correctly, please refer to the table below for a
list of solutions to known problems.
If the pressurisation unit is showing a fault code on the display, holding down the [SET] button will cause the current
system pressure to be temporarily shown on the display.
Symptom
LOW PRESSURE fault
is displayed and the
pumps do not run
HIGH PRESSURE fault is
displayed
P1 and/or P2 FLOOD
LIMIT is displayed
P1 and/or P2 FAIL is
displayed
P2 FAIL is displayed but
the unit is a single pump
model
LOW H20 fault is
displayed
HIGH H20 fault is
displayed
Pressure reading does
not
match actual system
pressure
ERROR 1 fault is
displayed
flowpress
Problem
The internal isolation valve within the unit is
closed
The system pressure has fallen below the
LOW PRESSURE set point
The SPC CONTROLLER option is enabled
The LOW PRESSURE set point is too high
The isolation valve in the unit is closed
The system pressure has risen above the
HIGH PRESSURE set point
The expansion vessel has failed or lost its
pre-charge
The expansion vessel is undersized
The HIGH PRESSURE set point is too low
A large amount of water has been lost from
the system
The pump is air-locked
The unit is undersized for the system
The FLOOD LIMIT time is too short.
The PUMP TYPE option is set incorrectly.
The relevant pump has failed
The PUMPS NUMBER option is
incorrectly set to 2
The mains water supply to the unit has
been isolated
The mains pressure is poor
A non-standard electrical connection
has been made into terminals 19 & 20
The low water float switch has failed
The digital controller has failed
A non-standard electrical connection
has been made into terminals 21 & 22
The digital controller has failed
The internal isolation valve within the
unit is closed
The SENSOR TYPE option is set
incorrectly
A non-return valve has been installed
between the unit and the system
The pressure sensor has failed
The SENSOR TYPE option is set
incorrectly
The pressure sensor has failed
WMDA Pressurisation Units
Solution
Open the internal isolation valve
Increase system pressure using a filling
loop, or enable the SYSTEM FILL option
Disable the SPC CONTROLLER option
Review the system specifications
Open the internal isolation valve
Decrease system pressure using a suitable
drain point
Check the expansion vessel pre-charge
and re-charge if necessary
Review the expansion vessel selection
Review the system specifications
Investigate cause
Bleed the pump
Review unit selection
Consult Flowtech
Review PUMP TYPE setting
Replace pump
Set PUMPS NUMBER to 1
Turn on the mains water supply
The fault will clear once the break tank has
been re-filled
Remove all non-standard electrical
connections
Replace low water float switch
Replace digital controller
Remove all non-standard electrical
connections
Replace digital controller
Open the internal isolation valve
Review SENSOR TYPE setting
Remove non-return valve
Replace pressure sensor
Review SENSOR TYPE setting
Replace pressure sensor
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