Burkert 6518, Operating Instructions Manual, Page: 19 / 57

6518 / 6519 - 17
I
NSTALLATION
, I
NITIALISATION AND
S
ERVICE
english
Faults
Fault Possible cause Correction
Valve does not
switch Operational voltage too low or
not present; Check the electrical supply connections.
Ensure that the electrical power supply is the same as
that spe-cified on the rating plate.
Manual override not in neutral
position; Set the manual override to the zero position.
Compressed air supply not
available or insufficient. Carry out the dimensioning of the compressed air
connection with volumes as large as possi-ble (including
that of upstream pressure regulators, service units, cut-
off valves etc.)
Minimum operational pressure 2 bar
Valves switch
with a delay, or
exhaust
through the
venting ports: Compressed air supply not
available or insufficient; Führen Sie die Druckversorgung möglichst großvolumig
aus (auch bei vorgeschalteten Geräten wie
Druckreglern, Wartungseinheiten, Absperrventilen usw.).
Mindestbetriebsdruck 2 bar
Valves are not in the starting
position (whitout current)
during pressure build-up.)
Appley pressure to the valve block before you switch the
valves
Insufficient venting of the
exhaust channels due to
silencers that are too small or
are soiled (back-pressure);
Use silencers or expansion channels with sufficient
dimensions.
Clean soiled silencers.
Impurities or foreign matter in
the pilot valve or main valve.
Blast through the exhaust cahnnels with pulsed
compressed air, to blow out impurities. Install a new pilot
or main valve if these measures bring no improvement.
Leaking valve
block: O-rings between the modu-
les missing or damaged; Check for leaks and for missing seals.
Missing or incorrectly posi-
tioned profile gaskets be-
tween the valve and the
baseplate.
Install the missing seals and replace damaged seals.