Troubleshooting - Jet MAXI D125 Operation & 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
We reserve the right to change designs and technical specifications of our products
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 internal isolation valve within
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 relevant pump is air-locked and
not pumping water
The unit is undersized for the system
The FLOOD LIMIT time is too short.
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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 Wolseley
.
Solution
Rev 8.1 Oct-15 Page 35 / 42