The pump is running against a closed valve (dead-head) or voltage drop.
Pedrollo PSG-1 is a water pressure switch designed to automatically start and stop electric water pumps based on pre-set pressure levels. It is commonly used in agricultural, irrigation, and autoclave systems. Pump Express Manual & PDF Resources Official Adjustment Guide : You can find a detailed manual from Pedrollo Polska pedrollo psg-1 manual pdf
Always verify that your manual includes the correct wiring diagram, part numbers, and torque specifications for your specific voltage and year of manufacture. The pump is running against a closed valve
Loss of prime or air leak on suction line. Pump Express Manual & PDF Resources Official Adjustment
Searching for a "Pedrollo PSG-1 manual PDF" online often leads to sketchy third-party sites or outdated forums. Here is why securing the genuine PDF from a trusted source is critical:
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Note: Users sometimes confuse the PSG-1 with the PQ series or the CP series. The PSG-1 is defined by its specific motor frame size and 1” ports.