SMC Networks IL201 Series, Operation Manual

Page: 9 / 14

7. Maintenance
Warning
(1) If handled improperly, compressed air can be dangerous. Maintenance and replacement of
unit parts should be performed only by trained and experienced personnel for
instrumentation equipment as well as following the product specifications.
(2) For maintenance, removing lock-up valve or replacing unit parts without dismounting, stop
supply pressure and exhaust residual pressure beforehand.
(3) After installation, repair and disassembling, connect compressed air and perform a proper
function test and a leak test. If bleed noise is louder than the initial state or operation is
abnormal, stop operation and check if installation is proper or not.
Caution
(1) Check air leak from piping which compressed air flows. Air leak from air piping could
deteriorate characteristics.
Air is exhausted from the bleed port constantly, and this air consumption is essential due to
valve structure, so that it is not a problem if the range is within the specification.
Small amount of air leaks from diaphragm (cloth between rubber sheets of diaphragm) and
its seating part, but it is within the tolerance.
(2) Check if supply air is clean or not. If dust, particle, oil, and moisture contained in supply air
are entered in the device, it may cause malfunction or failure of lock-up valve, so that
regularly examine air preparation equipment.
(3) When a lock-up valve is disassembled, apply small amount of grease to sliding sections (“O”
ring).
Use grease of Toray Silicon SH45 Silicon Grease.
(4) Examine lock-up valve once a year. Replace deteriorated packing parts such as diaphragms
and “O” rings, and units during maintenance.
Especially, when the product is operated in severe environment and operating conditions
such as the coast, take measures early.
(5) The interval of 3 years is recommended t change diaphragm, “O” ring and spring.
(6) Refer to the spare parts list as for parts for replacement.
(7) Assembling / disassembling of the product should be performed indoors in accordance with
the assembling / disassembling drawing.
(8) 1
～
2 times of operation test is necessary if the product is not operated for a long period.
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