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45
Malfunctions
9
MALFUNCTIONS
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
Содержание 8643 PA
Страница 15: ...15 System Description 5 3 Dimensions 260 160 188 110 240 92 Fig 5 Dimensions Type 8643 english Type 8643 PA...
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