SOR Sealed Level Switches - Manual (Page 6)

6/8 Form 1428 (01.14) ©SOR Inc.
Maintenance

Keep the cover tightly secured to the housing.

Prevent moisture or dirt from entering the housing when the cover is off.

Check all screw terminal connections periodically. Vibration may loosen the
screw terminals.

Clean the float and counterweight mechanism periodically to assure continued
free movement.

Make no adjustments to the switch mechanism. It is factory calibrated for
optimum performance.
Do not remove the cover when the unit is energized. Risk of electrical shock
resulting in serious injury and/or death.
Troubleshooting
Symptom Probable Cause
The float is in actuated position
but the switch does not actuate.
a. The terminal block is wired incorrectly. Check wiring.
b. The unit is installed upside-down. Rotate housing so
that the nameplate faces up.
c. The switch is damaged. Contact the factory.
The float is in de-actuated position
but the switch remains actuated. a. The terminal block is wired incorrectly. Check wiring.
b. The switch is damaged. Contact the factory.
The control will not function
when installed but operates when
removed from process connection. a. Float travel is inadequate. Check for internal
vessel obstructions.
See Mounting Requirements
Liquid is in the vessel at the
actuation level but the unit does
not respond.
a. The float pivot pin is bound up or dirty. Clean the float pivot pin.
b. The unit is installed upside-down. Rotate housing so that the
nameplate faces up.
c. The specific gravity of the liquid is not sufficient to lift the float.
d. The float is leaking or collapsed. Contact the factory.