SMC Networks SYJ3000 Series Operation Manual page 27

For valve non-conformance, take following
Trouble
countermeasures referring to trouble.
Find and check the air
leakage point.
1. Leakage between
valve and base.
(Base mounted type)
2. Air leakage from output
Air leakage
[2(B),4(A)] port and
exhaust [5 (EA),3(EB)]
port.
3. Air leakage from the
pilot valve air exhaust
port (PE port).
(External pilot type)
If the countermeasures above are not effective, there may be a trouble with the valve.
Stop using the valve immediately.
If any of the examples below are applicable, there may be an internal trouble with the valve.
Stop using the valve immediately.
① It was used with a voltage other than the rated voltage.
② The supplied oil was not the specified type.
③ Lubrication was stopped during operation. or lubrication was interrupted temporarily.
④ Severe impact was applied.
⑤ Foreign matter such as condensate or dust has entered into the product.
⑥ Other than the cases mentioned above, any usage which falls under the precautions in this operation manual.
※ If you request us to investigate, please send the valve back to us in its original condition without disassembling it.
Possible causes
1) Valve mounting screw is loose
2) Damage or displacement of the
gasket
3) Foreign matter caught in the gasket
seat
1) Valve mounting screw is loose
2) Internal air leakage increased
because foreign matter get caught in
the main valve.
3) Sealing failure of the actuator
(cylinder)
1) Foreign matter is caught in the pilot
valve armature.
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Countermeasures
- Tighten the mounting screw.
Proper tightening torque
- M1.7: 0.12N・m
- M2.5: 0.45N・m
- M3: 0.8N・m
- If gasket is scratched, replace the
gasket.
- Eliminate foreign matter with air blow.
- If gasket is scratched, replace the
gasket.
- Tighten the mounting screw.
Proper tightening torque
- M1.7: 0.12N・m
- M2.5: 0.45N・m
- M3: 0.8N・m
- If gasket is scratched, replace the
gasket.
- Replace the valve.
- Clean the air supply.
- Refer to the operation manual of the
actuator for details.
- Replace the valve.
- Clean the air supply.
No. SYJ3000-OMM0002-B