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(SENS) potentiometer
clockwise
2. Replace pickup coil and/or interconnec-
ting wiring.
3. Replace PCA-114.
4. Replace PCA-115.
5. Replace PCA-112.
Unit gives pulse output with
1. Noise pickup, turn sensitivity adjust
no flow present
counter clockwise until correct zero flow
indication is obtained.
2. Replace pickup coil.
3. Replace PCA-115.
4. Replace PCA-114.
19
TROUBLESHOUTING GU IDE
OBSERVED CONDITION
Unit repeatedly blows fuses.
CORRECTIVE ACTION
1. Inspect terminal strip wiring for conformi-
ty to the installation instructions and for
acceptable workmanship
2. Verify correct fuse size.
3.
Replace PCA-112.
4. Replace PCA-115.
5. Replace PCA-114.
NOTE
Unit gives no pulse output
w ith flow present.
If unit continues to blow fuses it is
advisable to return it to the factory.
This defect is difficult to diagnose in
an assembled system.
1. Turn sensitivity
FTB500, an internal 120 Hz test frequency has been provided.
Refer to Section 3.2, Calibration Procedure Failure conditions are listed and
the possible corrective actions are given to eliminate the observed problems.
(Cont 'd)
In case of an inoperable or malfunctioning system the following procedures
can be used to isolate the faulty wiring, printed circuit boards and/or alter-
nate causes. The majority of repairs can be made in the field thereby reduc-
ing the time a unit is out of service
A recommended spare parts list is given in Section 6. The necessary
documentation is contained within this manual with the exception of the
calibration data sheet for the turbine flowmeter. This calibration is supplied
separately.
To test the
TROUBLESHOOTING GUIDE
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