Samson 3767 - Page 62

8-2 EB 8355-2 EN
Malfunction
Table 8-1: Troubleshooting
Description of fault Measures
Actuator moves too slowly. Î Check the supply pressure.
Î Check the cross-section of the piping and
screwttings.
Î Checkthecongurationofthemountingparts.
Actuator moves in the wrong direction. Î Check piping.
Î Checkthecongurationofthemountingparts.
Air leaks from the positioner. Î Check the seals in the connecting plate.
Thesetpointspanisnotreachedata100%sig-
nal.
Î Check whether the correct range spring has
been selected.
Î Check the adjusted air output and proportional
band.
Î Check the adjusted span.
Zeroisnotreachedata0%signal. Î Checktheadjustedzero.
Limit switch does not work properly Î Check the limit switch setting.
Î Check the wiring and polarity of signal wires.
The solenoid valve frequently switches. Î Check the supply voltage.
The position transmitter does not work. Î Checkzeroandspanatthepositiontransmit-
ter.
Î Check the wiring.