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Pump with pressure control ONGA SMH45, fails to start up occasionally. The fault light comes on and I have to restart - which then most of the time works...

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Posted on Jan 02, 2017

  • 832 Answers

SOURCE: onga smh45 tripping rcd

Check the electrical connection for grounded wires or
loose electrical connections. Use wire nut for all electrical connnection and tape it properly. This should
correct the 20 ohms earth leakage. Send you e-mail comments for further assistance.;

Posted on Oct 27, 2009

  • 760 Answers

SOURCE: I have an Onga smh45

This could be your problem. Make sure it isn't running dry.
D.R.O.P (Dry Running Over-Temperature Protection)
The Onga SMH series of pumps (excluding the SMH35) are fitted with the internationally patented D.R.O.P system which protects the hydraulic parts from possible damage that can be caused by overheating of the liquid inside
the pump casing. The overheating can be the result of external causes (outside the pump) or occurs because the pump stops priming and as water is pumped out the
pump runs dry.The D.R.O.P system is reset using the switch located on the condenser.
If you have access to an amp meter, measure the curring when pumping full load, and be sure it is less than the full load amperage listed on motor.

Posted on Aug 10, 2010

  • 126 Answers

SOURCE: how to adjust pressure switch onga pump.

your pump should have a 20lb seperation ie. pump turns on at 20lb and off at 40lb or on at 50lb off at 70lb. under the cover of the switch theres two screws with springs under them.dont mess with the small one.the large one if you screw it down (right) will increase the pressure while maintaining the 20lb separation. one thing to keep in mind its fine to adjust the pressure BUT at the same time the air pressure in the tank needs to be adjusted to two lbs below the cut in pressure of the pump.

Posted on Jan 18, 2011

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The Onga SMH series of pumps (excluding the SMH35) are fitted with the internationally patented D.R.O.P system which protects the hydraulic parts from possible damage that can be caused by overheating of the liquid inside
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