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Malfunctions, Malfunctions 10 – Burkert Type 8643 User Manual

Page 47

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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