Samson 2479, Mounting And Operating Instructions

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EB 3132-3 EN 8-1
Malfunctions
8 Malfunctions
8.1 Troubleshooting
Malfunction Possible reasons Recommended action
Temperature at the
sensor or the flow rate
exceeds the set point.
Insufficient pressure pulses on the oper -
ating diaphragm
Î
Clean the control line and screw fittings.
Foreign particles blocking the plug
Î
Remove foreign particles.
Î
Replace damaged parts.
Î
Contact SAMSON's After-sales Service.
Seat and plug are worn or leak.
Î
Replace the damaged seat and plug.
Î
Contact SAMSON's After-sales Service.
Valve too large for control task (flow
rate) or too small (differential pressure)
Î
Check the sizing.
Î
Change K
VS
/C
V
coefficient, if necessary or in -
stall a different sized regulator.
Î
Contact SAMSON's After-sales Service.
Defective operating diaphragm
Î
Replace damaged diaphragm.
Seat and plug are worn or leak.
Î
Clean the seat and plug.
Î
Replace the damaged seat and plug.
Î
Contact SAMSON's After-sales Service.
A safety device (e.g. STL or STM) has
been triggered.
Î
Check plant. Unlock safety device (where nec -
essary).
Sensor installed in the wrong location.
Î
Change the mounting position.
Sensor installed incorrectly.
Î
Immerse the temperature sensor with its entire
immersion depth in the process medium.
Î
Avoid an installation site where idle times or
heat buildup can occur.