Malfunctions; Emergency Action - Samson 3374 Mounting And Operation Instructions

8 Malfunctions

Î Troubleshooting (see Table 8-1).
Note
Contact SAMSON's After-sales Service for malfunctions not listed in the table.
Table 8-1: Troubleshooting
Error
Actuator stem does not move.
Actuator stem does not move
through the whole range.

8.1 Emergency action

The valve, on which the actuator with fail-safe action is mounted, is moved to its fail-safe po-
sition upon failure of the supply voltage (see the 'Design and principle of operation' section).
Plant operators are responsible for emergency action to be taken in the plant.
Tip
Emergency action in the event of valve failure is described in the associated valve documen-
tation.
EB 8331-3 EN
Possible reasons
Actuator is blocked.
No or incorrect supply voltage
connected.
No or incorrect supply voltage
connected.
Malfunctions
Recommended action
Î Check attachment.
Î Remove the blockage.
Î Check the supply
voltage and
connections.
Î Check the supply
voltage and
connections.
8-1