ISD Alarm Message Diagnostics DEGRD COLLECT
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DEGRD COLLECT
A 7-day Degradation A/L Test failure occurs when the A/L ratio is at least 25% below the lower certified A/L ratio
or at least 25% above the upper certified ratio.
ISD MONITORING CATEGORY
Vapor Collection Monitoring for sites equipped with assist vapor recovery systems is responsible for ensuring that
proper front-end vapor capture is occurring during fueling events. Among other components, front-end equipment
includes the nozzle, hose and the breakaway. Vapor collection is assisted by vacuum motor(s) located inside the
dispenser vapor return piping.
DIAGNOSTIC PROCEDURE
• Perform the TP 201.5 A/L test. To find the hose that triggered the alarm by looking at the Collection Tests in the
ISD Daily Report in the normal menu.
• Refer to the Clear Test Repair Menu (on page 36) for clearing this alarm on the TLS after repairs are complete.
FIELD NOTES
This alarm should not occur at a VST Balance site. If it does check EVR Type setup in ISD.
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