Question about Grundfos MQ3-45 1 HP Pressure Booster Pump
There are only a couple of conditions that will cause an MQ to cut out, those being: full pressure being reached, a dry run condition (takes 30 secs to occur) or a voltage issue/ overload. The pump may be coming up to pressure and shutting down only to find the pressure drop and need to start again, very common on low flow conditions. Is the suction check valve in place?
Posted on May 18, 2010
Replace control unit or bypass control with a normal pump pressure switch..I recomend the bypass..it works and I had to replace the control unit twice in two years..nor no problem..
Posted on Jan 14, 2012
Did you find soloution yet
Posted on Oct 11, 2011
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Posted on Jan 02, 2017
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