Troubleshooting
10.2
Pneumatic Problems
Problem
Possible error
Solution
Where to find
Actuator does not react
to electrical control
signal.
There is no supply
pressure at the
actuator.
Supply the right
pressure to the
actuator.
Section 2.3
Check that the actual
supply pressure is
higher than the sizing
pressure.
Actuator does not
react good to electrical
control signal.
There is sufficient
supply air pressure but
insufficient supply air
capacity.
Take care the supply
air tubing has the right
dimensions.
Section 4.6
Supply pressure too
low, causing pilot
operated solenoid valve
to fail.
Check that supply
pressure at the
actuator and solenoid
is sufficient to operate
the actuator.
Section 2.3
Check that the actual
supply pressure is
higher than the sizing
pressure.
Solenoid valve is not
mounted properly.
Check the solenoid
valve mounting.
Instructions shipped
with the solenoid valve.
Speed control throttle
(if present) blocks air
flow.
Turn the speed control
more open.
Instructions shipped
with the speed control
valve.
Manual override
(if present) on the
Solenoid Valve is
locked.
Unlock manual override
on the solenoid valve.
Instructions shipped
with the manual
override.
Air leakage between
actuator and solenoid
valve.
Sealing between
solenoid valve and
actuator is not
mounted air tight.
Reassemble solenoid
valve taking care, that
all seals are in place.
Instructions shipped
with the solenoid valve.
Double-acting actuator
will only move to
“open” position.
Actuator has wrong
solenoid valve
configuration.
Mount a solenoid valve
suitable for double-
acting actuators
(4/2 or 5/2 function).
Instructions shipped
with the solenoid valve.
Check that conversion
plate on solenoids, that
have both 3/2 and 5/2
functions, is in the right
position.
Instructions shipped
with the solenoid valve.
Leakage notice on the
actuator.
Seals on the limit stops
screws are not air tight.
Turn the lock nut of the
bolts tighter; until the
leakage stops.
Section 9.6
Seals on the end caps
are not air tight.
Disassemble the end
caps, replace O-rings
and reassemble.
Consider to replace
all O-ring seals and
bearings.
Section 9.6 or Section 6
Seals on the pinion top
and bottom are not air
tight.
Disassemble the
complete actuator,
replace O-rings and
reassemble. Consider
to replace all O-ring
seals and bearings.
Section 9.6 or Section 6
40
September 2015
Installation, Operation and Maintenance Manual
DOC.IOM.EF.EN Rev. 6
Section 10: Troubleshooting
Summary of Contents for EL-O-Matic F-Series
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