21
Fault
Effect
Possible cause
Remedy
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 of enclosure
pressure does not
disappear 4 s after
pressure drop (e.g.
through opening of
enclosure door)
“Switchpoint of
Minimum Pressure“ is
incorrectly set
Readjust the limit
value
Lockable switch for
EEx bypass has been
activated
Turn lockable switch
to “off“ position