Little Giant 5-Series Manual page 6

OPERATION
Testing Automatic Pump Operation
Testing the Diaphragm Switch
NOTE: This test is recommended for bench testing only.
1. Squeeze the bulb of a suction bulb syringe to create suction.
2. Insert the small end of the syringe into the breather tube of the power cord
or stripped end of the power cord.
3. Release the bulb to induce suction/vacuum.
4. Listen for the switch to make a click sound.
5. Once the suction/vacuum equalizes, listen for the diaphragm switch to
release.
The suction causes the switch diaphragm to draw inward, activating the switch inside the switch hous-
ing. When syringe is released, the diaphragm returns to its original position deactivating the switch
inside the switch housing.
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