Boss MX1-3E - Troubleshooting; Low Pressure Faults; High Pressure Faults; Flood Limit Faults

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Troubleshooting
BSS Technical (Leicester)
AMS Wigan
AMS Spares & Service (Nottingham)
Tel: 0116 262 3232
Tel: 0870 609 2101
Tel: 0870 850 3886
Email: enquires@bssgroup.com
Email: amspumps@bssgroup.com
Email: amsse@bssgroup.com
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
Problem
Solution
LOW PRESSURE fault is
displayed and the pumps do
not run
The internal isolation valve
within the unit is closed
Open the internal isolation
valve
The system pressure has fallen
below the LOW PRESSURE set
point
Increase system pressure using
a filling loop, or enable the
SYSTEM FILL option
The SPC CONTROLLER option is
enabled
Disable the SPC CONTROLLER
option
The LOW PRESSURE set point is
too high
Review the system
specifications
HIGH PRESSURE fault is
displayed
The internal isolation valve
within the unit is closed
Open the internal isolation
valve
The system pressure has risen
above the HIGH PRESSURE set
point
Decrease system pressure using
a suitable drain point
The expansion vessel has failed
or lost its pre-charge
Check the expansion vessel pre-
charge and re-charge if
necessary
The expansion vessel is
undersized
Review the expansion vessel
selection
The HIGH PRESSURE set point is
too low
Review the system
specifications
P1 and/or P2 FLOOD LIMIT is
displayed
A large amount of water has
been lost from the system
Investigate cause
The relevant pump is air-locked
and not pumping water
Bleed the pump
The unit is undersized for the
system
Review unit selection
The FLOOD LIMIT time is too
short.
Consult AMS