Malfunctions, Malfunctions 10 – Burkert Type 8643 User 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.
→
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.
→
Clean dirty silencers.
→
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