Samson 3730-3 Operating Instructions Manual page 124

Appendix
Message
HART parameter (Code 74);
Types 3730-3/3731-3 only
Options parameter
(Code 78)
Diagnosis parameter
(Code 80)
Diagnosis > Status messages > Extended
Air supply
Shifting working range
Leakage pneumatics
Limit working range
Observing end position
Connection positioner -
valve
124
Possible reasons
Error in HART parameters not
®
critical to control operation.
Error in option parameters.
Error in parameters not critical
to control operation.
− The supply pressure has
changed.
− The supply pressure is
insufficient.
− The supply pressure is
working at full capacity.
The working range has shifted
towards CLOSED or max.
OPEN position.
A leak in the pneumatics
exists.
− The working range is limit-
ed at upper or lower range
value.
− The valve has seized up
(no change possible).
− Course of end position
monotonically increasing/
decreasing.
− Course of end position
alternates.
− No optimal travel transmis-
sion.
− The mechanical link is
loose.
− The working range is limit-
ed.
Recommended action
Confirm error and change
parameter, if necessary.
Return positioner to
SAMSON for repair.
Confirm error. Perform new
reference test, if necessary.
Check supply pressure.
Rethink the working range.
Check that pneumatic instal-
lations and connections are
tight.
− Check that pneumatic
installations and
connections are tight.
− Check supply pressure.
− Check plug stem for
external influences that
could be blocking it.
Check seat and plug.
Check attachment.
Status
classifica-
tion Single reset
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Section 4.6.2,
section 5.1.2
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Section 4.3.2
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Section 4.6.2,
section 5.1.2
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Section 4.4.2
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Section 4.8.2
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Section 4.4.2
EB 8389 EN