Samson 4749, Mounting And Operating Instructions

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EB 4749 EN 9-1
Malfunctions
9 Malfunctions
The work described in this section is only to
be performed by personnel appropriately
qualified to carry out such tasks.
The LEDs illuminate constantly or blink (see
Table 9-1) to indicate a malfunction.
Risk of fatal injury due to the ignition of an
explosive atmosphere.
Î
Installation, operation or maintenance of
the position transmitter must only be
performed by personnel with
qualifications according to Clause 4.5 of
IEC 60079-14 who has undergone
special training or instructions or who is
authorized to work on explosion-
protected devices in hazardous areas.
Loss of the explosion protection due to
damage to the cover's thread and/or the
connecting thread.
Î
Do not open devices with flameproof
enclosures while they are energized.
Opening the position transmitter in
potentially explosive dust atmospheres will
render the explosion protection unsafe.
Î
Do not open the enclosure cover of the
position transmitter in potentially
explosive dust atmospheres.
Crush hazard arising from moving parts on
the valve and actuator.
Î
Before performing any mounting or
installation work on the position
transmitter, put the control valve out of
operation by disconnecting and locking
the supply and control signal.
9.1 Troubleshooting
See Table 9-1
9.2 Emergency action
The plant operator is responsible for emer-
gency action to be taken in the plant.
Emergency action in the event of valve
failure is described in the associated valve
documentation.
DANGER !
DANGER !
WARNING !
WARNING !
Tip