E.L.B. F-350

20
Fault Effect Possible cause Remedy
MAX pressure has
been exceeded.
Internal enclosure
pressure too high.
Pressure increases
e.g. through heat
Readjust leakage air
nozzle
Check the limit value
for “Switchpoint of
Overpressure“ and
enter new value
MAX pressure has
been exceeded. Air
outlet opening
(mechanical valve of
the control unit)
closed or clogged
Open or clean the air
outlet opening of the
control unit
Display for enclosure
pressure is shown, but
no enabling for non-
Ex units in the
enclosure takes place
Electrical circuit
incorrectly wired
Check electrial
connections
Unit switches off
automatically during
normal operation
Unit switches off
sporadically, followed
by a new purge start
Internal enclosure
pressure too near the
limit
Readjust leakage air
nozzle
Inlet pressure of the
system fails briefly,
possibly through
activation of a large
consumer
Increase the inlet
pressure at the
pressure regulator up
to 3.5 bar maximum
Automatic switching-
off of the non-Ex units
within the enclosure
Mains failure for
longer than 2 s
Automatic restart
Pressure is below MIN
value. Enclosure has
a leak
Seal off enclosure and
internal installations;
possibly readjust
leakage air nozzle
Pressure is below MIN
value. Cross-section
of inlet for
compressed air/ inert
gas is too small
Exchange hoses for
ones with a larger
diameter