SMC Networks VXP Series Operation Manual page 18

Airtight failure
Internal leakage
External leakage
Cause
Foreign matter
Parts break, wear deteriorate
Large vibration/Impact
Swelling and deterioration
due to fluid
Freezing
Piping condition
Packing defect (O-ring)
Swelling and deterioration
due to fluid
Parts break
Freezing
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Countermeasure
Eliminate the foreign matter/ Install a filter
Replace the product
Vibration isolation/
Change installation site
Select the appropriate model
Take measures to prevent freezing
Piping check
Replace the product
Select the appropriate model
Replace the product
Take measures to prevent freezing