TROUBLESHOOTING
INTRODUCTION
6 - 2
Excessive air con-
sumption (exhaust
loud)
Leakage at the joint
of the manifold
assembly (if
equipped).
Remove manifold and check O-rings. Refer to Manifold in
Section 8.
Pilot valve body seal
is leaking.
Remove pilot valve body and check O-rings. Refer to Pilot
Valve Assembly in Section 8.
Tubing discon-
nected.
Check connection at pressure regulator and I/P converter.
Slow response Signal diaphragm
leaking.
Replace signal diaphragm. Refer to Diaphragm Assembly in
Section 8.
I/P converter out of
calibration or not
functioning.
Calibrate I/P converter. Refer to TROUBLESHOOTING CALI-
BRATION ADJUSTMENTS in Section 4. If unable to cali-
brate, replace I/P converter. Refer to I/P Converter in
Section 8.
Full range cannot be
obtained with
mechanical zero and
span adjustment
Signal diaphragm
leaking.
Replace diaphragm. Refer to Diaphragm Assembly in
Section 8.
I/P converter out of
calibration or not
functioning.
Calibrate I/P converter. Refer to TROUBLESHOOTING CALI-
BRATION ADJUSTMENTS in Section 4. If unable to cali-
brate, replace I/P converter. Refer to I/P Converter in
Section 8.
I/P converter is
defective.
Replace I/P converter. Refer to I/P Converter in Section 8.
Table 6-1. Positioner Errors
Error Probably Cause Corrective Action
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