SMC Networks LVP Series, Руководство по эксплуатации, Страница: 9 / 10

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Trouble Shooting
Failure
If valves do not operate properly,
refer the following failure and
perform countermeasures stated
in check list.
Causes Countermeasures
Malfunction
1.Fluid does not stop
1)Malfunction of
pilot valve
2)Failure of electrical
system
･
Replace valve
･
Clean air supply
sourse
･ Check power supply
1)Lacking pilot pressure
(N.O. valve,
double acting valve)
2)Main pressure is high
･ Set proper pressure
･
Set proper pressure
1)Back pressure is high
2)Particle intrusion
3)Mishandling of pilot port
･ Set proper pressure
･
Eliminate particles
and install filter
･
Check if the
connection of pilot port
is correct
2.Fluid does not stop 1)Malfunction of pilot valve
2)Failure of electrical system
･ Replace valve
･
Clean air supply
sourse
･
Check power supply
1)Lacking pilot pressure
(N.C. valve)
･
Set proper pressure
1)No main pressure
2)Side failure of piston
packing
･
Check to proper
pressure
･
Replace product
Failure of
air tight
1)Internal lackage
1)Instrusion of particles
2)Flaws on valve seat
･
Eliminate to proper
pressure
･ Replace product
2)External leakage 1)Tightening failure
2)Breakage of
diaphragm
･
Tighten additionally
･ Replace product
Is pilot
signal input?
Yes
No
Is pressure
correct?
Yes
No
Is pilot
signal input?
Yes
No
Is pressure
correct?
Yes
No