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Malfunction
Temperature regulators for cooling applications · Type 4u
Temperature at the
sensor does not reach
the set point
Temperature fluctuates
Slow control response
EB 2111/2121/2123 EN
Possible reasons
Foreign particles blocking the plug
Seat and plug are worn or leak.
Control thermostat defective
Regulator or K
/C
coefficient too large
VS
V
Sensor installed incorrectly.
Sensor installed in the wrong location.
Regulator or K
/C
coefficient too large
VS
V
Sensor installed incorrectly.
Sensor installed in the wrong location.
Time constant is too large for the control
loop
Sensor installed incorrectly.
Recommended action
Î Remove foreign particles.
Î Replace damaged parts.
Î Contact SAMSON's After-sales Service.
Î Replace the damaged seat and plug.
Î Contact SAMSON's After-sales Service.
Î Replace the control thermostat.
Î Check the sizing.
Î Change K
/C
coefficient, if necessary or
VS
V
install a different sized regulator.
Î Contact SAMSON's After-sales Service.
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.
Î Change the mounting position.
Î Check the sizing.
Î Change K
/C
coefficient, if necessary or
VS
V
install a different sized regulator.
Î Contact SAMSON's After-sales Service.
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.
Î Change the mounting position.
Î Fill the thermowell with thermal paste or
remove the thermowell.
Î Contact SAMSON's After-sales Service.
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.
Malfunctions
8-3
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