SOR 1530 Pneumatic Level Switch - Manual (Page 4)

4/4 Form 439 (04.13) ©SOR Inc.
Replacement Parts
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Part Number Description
3130-052 316SS Float & Actuator Arm Assembly
3130-114 Pneumatic Relay Assembly
Troubleshooting
Symptom Probable Cause
Float in actuated position
but no output signal.
a. Pilot nozzle-seat worn or damaged. (No seating of
flapper.) Return to the factory or replace the switch.
b. Actuating lever bound up or dirty. Clean or return to the factory.
c. Damaged relay diaphragm. Replace the relay assembly.
d. Relay orifice plugged. Clean.
e. Insufficient supply pressure adjust to 20-60 psi.
f. Output line clogged. Clean.
Float in de-actuated position
but still receiving an output
signal.
a. Pilot nozzle plugged. Clean the pilot nozzle.
b. Actuating lever bound up or dirty. (Flapper remains seated.)
Clean or return to factory.
c. Vent screen clogged. Clean.
Control will not function
when installed but operates
when removed from vessel. a. Inadequate float travel. Float travel restricted by the
process connection.
Liquid in vessel at the
actuation level but unit does
not respond.
a. Leaky or collapsed float. Replace.
b. Liquid specific gravity too low.
c. Float stem bound up or dirty. Clean.
d. Float travel is obstructed. Verify float can move freely and is
not obstructed when installed.
Slow response.
a. Excessive volume in the output leg.
b. Leaky output line.
Fluttering output. a. Inadequate volume in the output leg.