Samson 3730-3 Operating Instructions Manual page 125

Message
Working range
Friction
Actuator springs
Inner (seat) leakage
External leakage
PST/FST
EB 8389 EN
Possible reasons
− The working range is
mainly close to the
CLOSED/max. OPEN
position.
− The working range is
mainly in the CLOSED/
max. OPEN position.
− The friction is much high-
er/lower over the entire
working range.
− The friction is much high-
er/lower over a section.
− The spring stiffness is re-
duced (spring failure).
− Reduced spring compres-
sion
− The actuator springs are
working at full capacity.
Alarm limit 2 or 3 exceeded.
Seat leakage exists.
External leakage may possibly
exist or is to be expected soon.
External leakage is perhaps
soon expected.
The partial stroke test or the
full stroke test has not been
completed successfully.
Recommended action
Rethink the working range.
Check the valve's packing.
Check actuator springs.
Check seat and plug.
Check the valve's packing.
Check test cancellation condi-
tions. See section 5.4 and
section 5.5.
Appendix
Status
classifica-
tion Single reset
• •
[ ]
Section 4.3.2
• •
[ ]
Section 4.7.2,
section 5.2.2
• •
[ ]
Section 4.6.2,
section 5.1.2
• •
[ ]
Section 7.1.2.4
•
Section 4.4.2
• •
[ ]
Section 4.5.2
•
Section 4.7.2
• •
[ ]
Section 5.4.4,
section 4.5.2
125