ABB AV1 Operating Instructions Manual page 56

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