ABB AV2123000 Positioner User Manual

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