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38
SECTION 5 TROUBLESHOOTING
In case of an inoperable or malfunctioning system the following
procedures can be used to isolate the faulty wiring, printed circuit
boards and/or alternate causes. The majority of repairs can be.
made in the field thereby reducing the time a unit is out of service.
The necessary documentation is contained within this manual
with the exception of the calibration data sheet for the turbine
flowmeter. This calibration is supplied with the turbine flowmeter.
Factory consultation is available to assist in diagnosing
problems. Please note that in some cases factory repairs can be
performed more easily than can be accomplished in the field.
Failure conditions are listed and the possible corrective actions
given to eliminate the observed problem.
Proper operation of the FLSC-34 can be assumed when with
power applied to the unit:
1. The pulse output produces a pulse train of the desired
amplitude when flow through the flow transducer occurs.
2. The analog output produces a current output signal of 4-20
mA with a span corresponding to that established by the
calibration procedure.
OBSERVED CONDITION PROBLEM CORRECTIVE ACTION
A. No Pulse Output 1. Inspect terminal strip wiring for
conformity,to the installation
instructions and for acceptable
workmanship.
2. Verify fuse is good with an ohm
meter.
3. Determine if flowmeter rotor is
fouled.
4. Defective pickup coil. Replace
5. Defective cable. Replace.
6. Defective FLSC-34. Repair or
replace.
7. Sensitivity potentiometer turned
fully clockwise - unit will not
function properly.
B. Pulsing Output With 1. Defective pickup coil. Replace.
No Flow 2. Defective cable. Replace.
3. Defective FLSC-34. Repair or
replace.
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