Samson 2469 - 5 Troubleshooting

5 Troubleshooting
10 EB 3132-2 EN
Troubleshooting
Fault Possible cause Solution
Flow rate Leakage between seat and plug Remove the regulator from the pipeline. Clean
the seat and plug. If necessary, replace the plug
(section 4.1). Otherwise, return the regulator to
SAMSON for repair.
Flow rate set point
exceeded
Operating diaphragm defective Replace the diaphragm (section 4.2) or return
the regulator to SAMSON for repair.
Control line clogged Remove the control line and clean it.
Valve too large for control task Recalculate the K
VS
coefficient and contact
SAMSON.
Flow rate set point
not reached
Set point range incorrectly
selected
Check the set point range and contact
SAMSON.
Safety device (e.g. pressure
limiter) triggered
Check the plant. Unlock the safety device.
Insufficient differential pressure
across the plant
Compare the existing differential pressure across
the plant with the plant drag.
Min. differential pressure = differential pressure
at restriction + (
V
•
/K
VS
)²
Strainer clogged Drain the strainer's filter and clean it.
Valve incorrectly installed Install the regulator with the direction of flow
matching the arrow on the valve body.
Temperature Leakage between seat and plug Remove the regulator from the pipeline. Clean
the seat and plug. If necessary, replace the plug
(section 4.1). Otherwise, return the regulator to
SAMSON for repair.
Temperature set
point at the sensor
exceeded or not
reached
Sensor installed in the wrong
location
Check that the sensor is fully immersed in the
process medium. Check that it is not installed in
a place where idle times or heat accumulation
occur.
Safety device (e.g. safety tem
-
perature limiter or monitor)
triggered
Check the plant. Unlock the safety device.
Temperature set
point at the sensor
exceeded
Insufficient energy available for
heating or cooling
Draw up an energy balance.
Thermostat defective Return the thermostat to SAMSON for repair.