Burkert 8653 AirLINE Field Operating Instructions Manual page 39

Type 8653
Maintenance, troubleshooting
Fault possible cause
Valves switching Pressure supply insufficient or not
delayed or blow off at available
the exhaust ports
Insufficient pilot pressure build-up
Valves are not in the home
position when building up pressure
(de-energised)
Insufficient venting of the exhaust air
channels due to insufficiently dimen-
sioned or soiled sound absorbers
(back pressures)
remedy
Ensure a sufficient pressure supply
(also for upstream devices such as
pressure controllers, maintenance units,
shut-off valves, etc.)
At valves without auxiliary pilot air:
Guarantee minimum operating
pressure of 3.0 bar and observe
the ratio of pilot pressure to medium
pressure in accordance with
the pilot pressure diagram
(see chapter "6.4.2" on page 15)
With 5/2-way valves (control function H)
and 2x3/2-way valves (control
function D, normally open), operate
the valve island with an external pilot
pressure supply
Pressurise the valve block before
switching the valves
Use sufficiently sized sound absorbers
or expansion tanks
Clean soiled sound absorbers
english
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