Bartec Ex p Control Unit APEX, Руководство пользователя

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Ex p Control Unit
SIEMENS Set
Maintenance and care
Rev. 0 01-37A2-7D0004_SIEMENS_Manual_Exp-Control-Unit_20220216_0_en.docx Page 67 of 80
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Error / Fault Possible cause Remedy
“Operate” LED does not
flash during purge time Setpoint pressure of the
pressure reducer is not
reached Remove the cap or
eliminate the reduction by
taking suitable measures
Pressure monitor of the
control unit is
inadmissibly closed or has
a reducer Seal enclosure using
suitable measures
Enclosure leaks during the
pre-purge phase due to
increased internal
pressure Check purge gas valve for
the presence of supply
voltage
Digital purge gas valve
does not switch to the
small nozzle after the
pre-purge phase Temperature sensor is
connected, internal
temperature too high Check purge gas valve for
foreign particles in the
mechanical part
Wait until the increased
flow rate has caused the
internal temperature to
drop or check the set
temperature switching
value
Main switch or bridge to
the terminals Hs_In /
Hs_Out not connected Switch on main switch or
connect bridge to terminal
Hs_In / Hs_Out
Purge gas valve does not
close Check purge gas valve for
disconnected supply
voltage
Control unit does not
switch on the electrical
devices after the pre-
purge phase Pressure in the enclosure
higher than the switching
value ”p4” Reduce the flow rate of the
air leak needle
Switching value “p4” too
low Check switching value “p4”
Pressurized enclosure
leaking, switching value
“p1” not reached Seal pressurized enclosure
The control unit switches
off the electrical devices
after the purge time with
a 5 sec. time delay Leakage air needle of
digital valve too small Increase the air flow rate of
the leakage air needle
Switching value “p3“ too
high Check switching value “p3”
Relays K4 or K5 do not
switch Wrong selection of
switching parameters Check switching
parameters