Boss MX1-3E - User Manual

Questions and Answers

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shannonlunaAug 18, 2025
Why is the LOW PRESSURE fault displayed on my Boss MX1-3E Industrial Equipment and the pumps aren't running?
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  amandagreenAug 18, 2025
  If the LOW PRESSURE fault is displayed and the pumps aren't running on your Boss Industrial Equipment, there are several possible causes. First, the internal isolation valve within the unit might be closed; open it. Second, the system pressure may have fallen below the LOW PRESSURE set point; increase system pressure using a filling loop, or enable the SYSTEM FILL option. Third, the SPC CONTROLLER option might be enabled; disable it. Finally, the LOW PRESSURE set point could be too high; review the system specifications.
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Larry WatsonAug 20, 2025
What to do if the HIGH PRESSURE fault is displayed on my Boss Industrial Equipment?
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  christophergarciaAug 21, 2025
  If a HIGH PRESSURE fault is showing on your Boss Industrial Equipment, there are several reasons why. The internal isolation valve within the unit may be closed; open it. The system pressure may have risen above the HIGH PRESSURE set point; decrease system pressure using a suitable drain point. The expansion vessel may have failed or lost its pre-charge; check the expansion vessel pre-charge and re-charge if necessary. The expansion vessel might be undersized; review the expansion vessel selection. Finally, the HIGH PRESSURE set point could be too low; review the system specifications.
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Luis WilsonAug 23, 2025
How to fix LOW H20 fault on Boss MX1-3E?
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  Randy WardAug 23, 2025
  If the LOW H20 fault is displayed on your Boss Industrial Equipment, here's what might be happening. The mains water supply to the unit may have been isolated; turn it on. The mains pressure could be poor; the fault will clear once the break tank has been re-filled. A non-standard electrical connection may have been made into terminals 19 & 20; remove all non-standard electrical connections. The low water float switch may have failed; replace it. The digital controller could have failed; replace it.
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Steven PriceAug 26, 2025
Why is the pump repeatedly running in short bursts on my Boss MX1-3E?
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  Tyler HuangAug 26, 2025
  If the pump is repeatedly running in short bursts on your Boss Industrial Equipment, consider these potential causes. The internal isolation valve within the unit may be partially closed; fully open it. The restriction in the connecting pipe work could be too great; increase bore/ reduce number of bends/ reduce length of connecting pipe work. A pump non-return valve may have failed; replace it. The expansion vessel might have failed or lost its pre-charge; check the expansion vessel pre- charge and re-charge if necessary. The point of connection of the unit could be too far away from the expansion vessel; move unit/expansion vessel connection points closer together.
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David BowmanAug 27, 2025
What causes the pressure reading to not match actual system pressure in Boss MX1-3E Industrial Equipment?
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  ddixonAug 27, 2025
  If the pressure reading does not match the actual system pressure on your Boss Industrial Equipment, check the following: The internal isolation valve within the unit may be closed; open it. The SENSOR TYPE option might be set incorrectly; review the SENSOR TYPE setting. A non-return valve may have been installed between the unit and the system; remove the non-return valve. The pressure sensor could have failed; replace the pressure sensor.
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iscottAug 30, 2025
Why is the break tank overfilling in my Boss MX1-3E?
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  qshepherdAug 30, 2025
  If the break tank is overfilling and discharging water to drain on your Boss Industrial Equipment, here are a few things to check: The wrong/no flow restrictor may be installed in the float valve (MX, Digifiller and midi units only); check float valve flow restrictor selection (MX, Digifiller and midi units only). The float valve position could be set incorrectly; set the float valve to its lowest possible position. The float valve may have failed; replace the float valve. A pump non-return valve might have failed; replace the non-return valve.
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Lisa MartinezSep 1, 2025
What does P1 and/or P2 FLOOD LIMIT displayed mean on Boss MX1-3E?
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  Sara RamosSep 1, 2025
  If the P1 and/or P2 FLOOD LIMIT is displayed on your Boss Industrial Equipment, it could be due to a few reasons. A large amount of water may have been lost from the system; investigate the cause. The relevant pump could be air-locked and not pumping water; bleed the pump. The unit may be undersized for the system; review unit selection. The FLOOD LIMIT time might be too short.
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Linda GardnerSep 3, 2025
How do I troubleshoot the HIGH H20 fault on Boss MX1-3E Industrial Equipment?
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  Juan BrowningSep 3, 2025
  If the HIGH H20 fault is displayed on your Boss Industrial Equipment, it could be due to: A non-standard electrical connection has been made into terminals 21 & 22; remove all non-standard electrical connections. The digital controller has failed; replace digital controller.
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htaylorSep 5, 2025
What does ERROR 1 fault mean on Boss MX1-3E?
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  qgarciaSep 5, 2025
  If ERROR 1 fault is displayed on your Boss Industrial Equipment, the causes may be: The SENSOR TYPE option is set incorrectly; review SENSOR TYPE setting. The pressure sensor has failed; replace pressure sensor.
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Scott ThompsonSep 8, 2025
What causes P1 and/or P2 FAIL to appear on Boss MX1-3E?
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  John MontgomerySep 8, 2025
  If P1 and/or P2 FAIL is displayed on your Boss Industrial Equipment, it might be because: The PUMP TYPE option is set incorrectly; review PUMP TYPE setting. The relevant pump has failed; replace pump.