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51
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. 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-35B 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 voltage output signal of 0-5
Vdc with a span corresponding to that established by the
calibration procedure.
OBSERVED CONDITION CORRECTIVE ACTION
A. No Pulse Output 1. Inspect terminal strip wiring for
conformity,to the installation in
instructions and for acceptable
workmanship.
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-35B. Repair or replace.
7. Sensitivity potentiometer turned
fully clockwise - unit will not
function properly.
B. Pulsing Output 1 . Defective pickup coil. Replace
With No Flow 2. Defective cable. Replace.
3. Defective FLSC-35B, Repair or replace.
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