Malfunctions; Emergency Action - Samson 5824 Mounting And Operating Instructions

Malfunctions

12 Malfunctions
Î Troubleshooting (see Table 1).
Note
Contact SAMSON's After-sales Service department for malfunctions not listed in the table.
Table 1: Troubleshooting
Error
Actuator stem does not move.
Actuator stem does not move
through the whole range.
The actuator does not control the
valve position.

12.1 Emergency action

The valve, on which the electric actuator with fail-safe action is mounted, is moved to its fail-
safe position upon power supply failure (see section 3).
The plant operator is 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.
72
Possible reasons
Actuator is blocked.
No or incorrect power supply
connected.
No or incorrect power supply
connected.
The actuator was not initialized
during start-up.
The mounting has been changed.
Recommended action
Î Check attachment.
Î Unblock the actuator.
Î Check the power supply
and connections.
Î Check the power supply
and connections.
Î Check the switch position of
the function and operating
direction switches
Î Initialize the actuator.
EB 5824-2 EN