Pentair MYERS HJ Série Notice D'utilisation page 14

Troubleshooting
This information is for checking jet pump installations
which are not operating properly. It is based on the
premise that the installed system will consist of a jet
pump taking water from a well where the water level is
below the pump and the pump is delivering water into a
pressure storage tank.
Problem
Shallow Well
Pump will not prime.
Pump delivers water for
a period of time, then
stops pumping.
Pump does not deliver
rated capacity.
Motor overheats and
shuts off (overload.)
Motor fails or does not
operate properly.
Checking Procedure
Stop motor, remove priming plug, and fill case with water.
Make sure section line has no leaks and that it slopes gradually from pump to well with no
high or low spots.
Make sure pump shaft turns clockwise when viewed from motor end opposite shaft.
Check for plugged venturi or nozzle.
Make sure the foot valve is not sitting sand or mud and that it is not stuck shut.
Make sure well water is not drawing below the foot valve. Use a water level tester while
pump is operating.
Check for plugged or worn nozzle or venturi tube.
Check for plugged impeller parts.
Check nozzle and venturi for wear or partial plugging.
On 3/4 and 1 HP models, make sure diffuser o-ring seal is in place.
Check pressure gauge. It may be defective, resulting in false readings.
Make sure motor is properly wired for the supplied voltage.
Make sure wire is properly sized.
Make sure the impeller is not rubbing against the pump case.
If within warranty, return pump/motor to place of purchase (with proof of purchase) for
repair or exchange, if necessary.
Risk of electric shock. Can shock, burn or
kill. To guard against accidental personal injury, the
electric power to the pump should be turned off when
conducting the checking procedures outlined. There are
obvious exceptions, however, and service personnel
should take necessary safeguards against the hazard of
electrical shock.
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