Troubleshooting - Boss MX1-3HL 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.
Fault Finding
• Check electrical supply.
• Check for external controls affecting the unit.
• If the pump is running continuously:

Either the system is not full (possibly a leak)

Check the pump pressure switch operation

Check the Pressure Reducing Valve operation
• If the pump does not run:

Check the pump pressure switch operation

Check the pump operation

Check the internal filter within the break tank is present and clear
• If the unit fails to pressurise the system:

Check the system connection valve is open

The operation of the break tank float valve that there is water available in the break tank

Check the internal filter within the break tank is clear

Check for system leaks
• For intermittent running, but normal when pressurising, check for system leaks
• If the system over-pressurises:

Check the operation of the pump pressure switch

Check the operation of the Pressure Reducing Valve (if fitted)
We reserve the right to change designs and technical specifications of our products
www.bssindustrial.co.uk
.
Rev 2.1 Oct-15 Page 23 / 28