english
19
Operating Instructions-No. 803 150
Correction
Check the electrical supply
connections.
Ensure that the electrical power
supply is the same as that spe-
cified on the rating plate.
Set the manual override to the
zero position.
Carry out the dimensioning of
the compressed air connection
with volumes as large as possi-
ble (including that of upstream
pressure regulators, service
units, cut-off valves etc.)
Minimum operational
pressure
≥≥
≥≥
≥ 2 bar
Carry out the dimensioning of
the compressed air connection
with volumes as large as possi-
ble (including that of upstream
pressure regulators, service
units, cut-off valves etc.)
Minimum operational
pressure
≥≥
≥≥
≥ 2 bar
Use silencers or expansion
channels with sufficient
dimensions.
Clean soiled silencers.
Blast through the exhaust chan-
nels with pulsed compressed
air, to blow out impurities.
Install a new pilot or main valve
if these measures bring no
improvement.
Check for leaks and for missing
seals.
Install the missing seals and
replace damaged seals.
4.8 Faults
Possible cause
Operational voltage too low
or not present;
Manual override not in neu-
tral position;
Compressed air supply not
available or insufficient.
Compressed air supply not
available or insufficient;
Insufficient venting of the
exhaust channels due to
silencers that are too small
or are soiled (back-
pressure);
Impurities or foreign matter
in the pilot valve or main
valve.
O-rings between the modu-
les missing or damaged;
Missing or incorrectly posi-
tioned profile gaskets be-
tween the valve and the
baseplate.
Fault
Valve does not switch:
Valves switch with a
delay, or exhaust
through the venting
ports:
Leaking valve block:
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