The SLP device is a filter designed to prevent voltage peaks, caused by electric abnormalities in the supply network or by other various electrical interferences, from damaging the electrical components built within ZDS pumps. In such cases the SLP interrupts the power supply. SLP is recommended to guarantee a complete protection also when a generator with internal combustion engine is used or when the pump is installed in areas frequently disturbed by lightning or by other causes.
Green light = SLP operative
When the light is green, the SLP is correctly powered and the pump is protected even if the pump is not operating.
Red light = SLP operative (pump running)
When the light is red, the SLP is correctly powered and the pump is protected during operation.
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