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Troubleshooting
→ Using a screwdriver, loosen the fastening screws of the valve.
→ Remove the valve with flange seal from the valve block.
→ Connect a new valve with correctly inserted flange seals to
the valve slot.
→ Tighten the fastening screws in diagonal pairs while observe
the permitted tightening torque (see "Fig. 17").
20 Ncm
1
2
20 Ncm
Fig. 17: Tightening the screws when replacing the valve
Type 8647
30 Ncm
3
4
30 Ncm
13
TrouBleshooTinG
13.1
Valve reaction
malfunction
possible cause
Valves do not
No or insufficient load
switch
voltage
Manual override of the
valves not in neutral
position
Inadequate or no
pressure supply
Incorrect configuration Configure the system
english
corrective action
Check the electrical
connection
Ensure correct load
voltage
Bring manual override
into neutral position
Design the pressure
supply with the largest
possible volume (even
for upstream devices
such as pressure con-
trollers, maintenance
units, shut-off valves,
etc.).
Ensure a minimum
operating pressure
of 2.5 bar for valves
without auxiliary
control air
according to the
hardware set-up
33
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