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4.3 TROUBLE SHOOTING
TABLE I. TROUBLE SHOOTING GUIDE
OBSERVATION
PROBABLE CAUSE
REMEDY
Flow trip level continually
drifting downward with constant
flow.
Coating forming on wetted
surface of transducer.
1. Clean transducer
periodically.
After switch has been operating
properly:
a. Relay trips with flow above
trip level and cannot be
adjusted using SECTION 3.3
instructions.
b. Relay does not trip when flow
falls below trip level and
cannot be adjusted using
SECTION 3.3 instructions.
1. Loose transducer cable
connections.
2. Transducer cable
damaged.
3. Bad electronic
component.
4. Blown fuse.
1. Securely connect
transducer cable.
Replace if damaged.
2. Replace fuse as needed.
3. Perform transducer
functional tests
(SECTION 3.5).
Relay cannot be made to trip by
adjusting "Trip" potentiometer.
1. Initial flow rate estimate
was too low or too high.
2. Flow media change.
1. Follow instructions
under SECTION 3.4 to
adjust trip level range.
2. Consult factory.
Switch level varies with flow, but
not stable.
1. Fluid temperature not
stable.
2. Fluid mixture not
properly blended.
3. Air mixed with liquid.
4. Flow not fully
developed.
1. Correct conditions to
remove obvious cause.
2. Check inlet an outlet for
proper straight line
length & freedom from
obstructions.
3. Consult factory.
Summary of Contents for Rheotherm 100FS
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