Burkert Type 8643 - Manual (Page 47)

47
Malfunctions
mAlfunCTions 10.
malfunction possible cause remedial action
Valves do not switch: No or inadequate oper-
ating voltage. Check the electrical connection.
→
Ensure the operating voltage according to type plate.
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Inadequate or no
pressure supply. Design the pressure supply with the largest possible
→
volume (even for upstream devices such as pressure
controllers, maintenance units, shut-off valves, etc.).
minimum operating pressure ≥ 2.5 bar
Valves switch with a
delay or blow off at the
deaeration connections: Inadequate or no
pressure supply. Design the pressure supply with the largest possible
→
volume (even for upstream devices such as pressure
controllers, maintenance units, shut-off valves, etc.).
minimum operating pressure ≥ 2.5 bar
Deaeration of the
exhaust air ducts inad-
equate due to too small
or dirty silencers (back
pressures). Use appropriately sized silencers or expansion tanks.
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Clean dirty silencers.
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Impurities or foreign
objects in the pilot valve
or main valve. Apply pulsed pressure to the exhaust air ducts to blow
→
out the impurities; install a new pilot valve or main
valve if this procedure is unsuccessful.
english
Type 8643 PA