SMC Networks DXT1215 Instruction Manual page 12

For valve non-conformance, take following
Trouble
countermeasures referring to trouble.
The valve is slow.
Actuators including
cylinder become slow.
Response
failure
Valve and
actuator
become
slow.
Air leakage from output
[2(B),4(A)] port and
Air leakage
exhaust [5 (EA),3(EB)]
port.
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.
It was used with a voltage other than the rated voltage.
①
The supplied oil was not the specified type.
②
③ Lubrication was stopped during operation. OR lubrication was interrupted temporarily.
④ Severe impact was applied.
Foreign matter such as condensate or dust has entered into the product.
⑤
⑥ Other than the cases mentioned above, any usage which falls under the precautions in this operation manual.
※ If the product has failed, then please return the valve without any modifications.
Possible causes
1) Leakage current
When the valve is turned off, it became
slow due to the residual voltage.
2) Clogging of the filter and silencer
Filter or silencer is clogged, or exhaust
port [5/3 (EA/EB)] is blocked.
3) Operation failure or sticking of the
main valve.
Foreign matter from the piping and air
source got caught in the main valve of the
valve, causing a delay.
Malfunction occurred due to sticking such
as swelling of the rubber part of the main
valve.
1) Internal air leakage increased
because foreign matter get caught in
the main valve.
2) Sealing failure of the actuator
(cylinder)
- 11 -
Countermeasures
-Check the residual voltage.
-Keep the residual voltage at 3% of the
rated voltage or less.
- Replace the filter.
- Replace the silencer.
- Do not block the valve exhaust port.
- Replace the valve.
- Check for abnormalities in devices other
than valves.
- Clean the air supply.
- If incorrect oil has been used for
lubrication, remove the oil by air blow.
- If there is a large amount of condensate
or condensate cannot be removed
completely, mount an auto drain or install
a dryer and replace the valve.
- Replace the valve.
- Clean the air supply.
- Refer to the operation manual of the
actuator for details.
No.DOC1003125