FAQ

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The EF and SE pumps are equipped with motors cooled by the surrounding pumped medium.

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Due to the modern design and manufacturing process, the motors currently in use often become hotter during operation than motors used in the past.

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There are several reasons as to why the permitted full load current could be exceeded when operating the pump:

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Pure, low-viscosity, non-explosive media without solid matter or long fibres.

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Grundfos industrial pumps can be equipped with a wide variety of mechanical seals.

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The flow switch only causes the MQ to switch off automatically during normal operation if the flow rate drops below 0.07 m³/h.

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The MQ is equipped with both an internal flow switch and an external pressure switch.

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The operating instructions provided with every Grundfos product contain relevant troubleshooting information.

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The suction line may be leaky, or there is air in the water.

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The problem may relate to the pressure switch (press control), since deposits can cause it to malfunction.

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