Bartec Ex p Control Unit APEX, Руководство пользователя

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Maintenance and care
Ex p Control Unit
SIEMENS Set
Page 66 of 80 01-37A2-7D0004_SIEMENS_Manual_Exp-Control-Unit_20220216_0_en.docx Rev. 0
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Faults and troubleshooting
ATTENTION
AN ALTERED OPERATING BEHAVIOUR CAN BE AN INDICATION OF ALREADY
EXISTING DAMAGE TO THE CONTROL UNIT.

Only put the Ex p system back into operation after the cause of a
fault has been rectified.
It is assumed that all external electrical and mechanical equipment have been
properly connected. Therefore, the correct installation and connection of the
electrical devices should be checked first.
Faults
Error / Fault Possible cause Remedy
Sporadic failure Cable break Check connections
Pressure drop / leakage Check tightness and leak
compensation
Control unit without
function Mains voltage not
available Check supply voltage
Device defective Return to manufacturer
The protected devices
are switched on without
pre-purge Bypass activated Deactivate bypass
Incorrect purge program
activated Check purge program
During pre-purge, the
purge gas valve switches
off for a short time Excessive amounts of
purge gas are introduced
into the pressurized
enclosure Reduce the purge gas
nozzle
“Operate” LED does not
flash during purge time
No purge gas Check purge gas valve for
the presence of supply
voltage
Purge gas valve does not
open or opens only
partially Check purge gas valve for
foreign particles in the
mechanical part
Increase inlet pressure to
setpoint value
An insufficient amount of
purge gas flows through
the Ex p enclosure Check purge gas nozzle for
correct value
Check setpoint values “p3”
and “p1” of the control unit
Increase the cross section
of the purge gas supply line
Purge gas supply line too
small. Enlarge cross section
of the supply line