Samson 2439, Mounting And Operating Instructions

Page: 33 / 40

EB 2185 EN 33
Malfunctions
Table 10: Troubleshooting
Malfunction Possible reasons Recommended action
Temperature exceeds the
adjusted limit.
Temperature sensor installed
in the wrong location.
Î
Install the temperature sensor into the pipeline in
such a way that the heat flow is correctly mea -
sured.
Foreign particles blocking
the valve plug
Î
Remove foreign particles.
Î
Replace damaged parts.
Valve trim is worn.
Î
Replace damaged parts.
The temperature adjusted at
the control thermostat reaches
the adjusted limit temperature.
Control thermostat defective
Î
Replace the control thermostat.
Temperature drops below the
set point adjusted at the
control thermostat.
Valve installed against the
flow.
Î
Install the valve so that the direction of flow
matches the direction indicated by the arrow on
the body.
Foreign particles blocking
the valve plug
Î
Remove foreign particles.
Î
Replace damaged parts.
Temperature sensor installed
in the wrong location.
Î
Install the temperature sensor into the pipeline in
such a way that the heat flow is correctly mea -
sured.
Valve or K
VS
/C
V
coefficient
too small
Î
Check the sizing.
Î
Change K
VS
/C
V
coefficient, if necessary or install
a different sized regulator.
Strainer blocked
Î
Clean strainer.
The safety temperature
limiter has been triggered.
Î
Check temperature regulator to ensure it functions.
Î
Check the set point of the control thermostat.
Î
Replace the defective STL, if necessary.
Jerky control response.
Increased friction, e.g. due
to foreign particles between
seat and plug.
Î
Remove foreign particles.
Î
Replace damaged parts.
Temperature fluctuates.
Valve too large
Î
Check the sizing.
Î
Change K
VS
/C
V
coefficient, if necessary or install
a different sized regulator.
Temperature sensor installed
in the wrong location.
Î
Install the temperature sensor into the pipeline in
such a way that the heat flow is correctly
measured (avoid dead times).
Leak at the joint between the
valve and safety temperature
limiter.
Seal is defective
Î
Replace damaged parts.
Î
Contact SAMSON's After-sales Service depart-
ment.