Field reference for fuel system and underground storage tank technicians. 14 entries, taken from the DropTubeBuilder app.
These notes are the web copy of the DropTubeBuilder reference, built for fuel system and underground storage tank technicians. The same library is free inside the app, with no time limit and no account, and it works with no signal.
Reference notes from DropTubeBuilder, the offline field tool for fuel system technicians who cut overfill drop tubes, build tank charts and chase dispenser faults. It works with no cell signal, because the sites do not have any.
Get DropTubeBuilder on the App StoreCommunication with the display module has failed. Action: check the display harness and connector at both ends, since a loose connector is reported as a module failure far more often than the module has failed; check for water ingress behind the display; check the module has power; reseat the connector and power cycle; check the module's software version matches what the dispenser expects; note that Encore 300 parts are not interchangeable with the S series, so confirm the part before ordering
The display module failed its self test. Action: power cycle and see whether it passes on a clean start; check the harness and connector for water and loose pins; check the module has a stable supply; check for corrosion or water damage on the module; swap with a known good module of the correct Encore 300 part to confirm, since S series parts will not work here
Dispenser communication has timed out. Action: check the two wire or network cable and terminations at the junction box for water and corrosion, which causes most of these; check whether other dispensers are also affected, which separates a site fault from this one; check the site controller and interface board are powered; check the dispenser address matches what the controller expects; check for a duplicate address causing intermittent dropouts; check polarity if recent work disturbed the wiring
A dispenser power fault. Action: check the breaker and incoming supply, measuring under load rather than at rest; check terminations inside the dispenser for looseness and corrosion; check the power supply output against specification; check whether the fault is site wide, which points upstream; verify configuration and calibration survived; if power faults repeat with no external cause, treat the power supply as failing
A dispenser firmware mismatch. Components are running versions that do not agree, so behaviour is unpredictable. Action: check the version of each component against what the dispenser requires; check whether a recent board swap brought an incompatible version; load the correct versions and let each finish without interruption; verify configuration and calibration afterwards; confirm the correct Encore 300 software, since S series versions do not apply to this platform
The payment module is unresponsive. Action: check the module has power; check its communication cable and connectors, particularly where the cable flexes at the door hinge; check whether other positions are affected, which points at the site system; power cycle the module and then the dispenser; check whether the payment network or site system was recently updated; check the module's software version
Printer paper is low or empty. Action: reload with the correct paper roll, loaded the right way round; check the paper path is clear and clean; check the paper type is correct, since the wrong stock jams repeatedly; check the low paper sensor if it reports empty with paper fitted; keep spare rolls on site
The card reader is malfunctioning. Action: check the reader cable and its connectors first, because the cable fails considerably more often than the reader; check the cable where it flexes at the door hinge; check for water in the connector; check the reader has power; clean the read path if cards are read intermittently; swap the reader only once the cable is proven, and confirm the correct Encore 300 part
The pump handle was left up at startup. The dispenser will not authorise with a handle already lifted, which is a safety behaviour rather than a fault. Action: check whether a nozzle is genuinely left up, which is the usual explanation; return the handle to the hung position and power cycle; if no handle is up, check the hang up switch for sticking, damage or water; check the switch adjustment, since a maladjusted switch reads as lifted; check the switch harness for a short to ground; test the switch directly before replacing anything
The pump is out of service due to a hardware fault. Action: read the surrounding event log entries, since they usually identify the actual subsystem rather than this general code; check which functions are unavailable, which localises the fault faster than testing everything; check power and all internal connections; check for water ingress and corrosion; power cycle and note what fails to come up; work the specific fault that emerges rather than this code on its own
The pulser signal is missing. Action: check the pulser harness and connector at both ends, since the wiring fails more often than the pulser; check for water in the connector; check the pulser mounting and coupling for slipping or misalignment; check the pulser has power where the type requires it; check for a break in the harness where it flexes; swap in a known good pulser of the correct Encore 300 part to separate the pulser from the wiring
Blender calibration has failed. Action: confirm both legs flow normally before attempting calibration again, since it cannot succeed on a starved leg; check the filters, shear valves and STP pressure on both legs; check the meters and pulsers on both legs; check the test measure and the procedure; repeat the calibration and prove each blended grade; Breaking a Weights and Measures seal to reach calibration is restricted to a registered service agent in most states, so confirm you are permitted before opening it, and arrange resealing and any required W&M notification afterwards
A price per unit failure on a nozzle. Action: check which nozzle position is reporting; check the display harness and connector for that position; check the price for that grade has been downloaded and is correct; check display addressing for duplicates; check the POS is sending prices for this position; confirm the correct price displays before allowing sales on that nozzle
Communication with the VaporVac module has been lost. Action: check the module has power and its indicators behave normally; check its harness and connectors, including anything disturbed by recent work; check for water ingress at the module; reseat the module and its connections; power cycle and see whether it enumerates; check what your local air district requires while vapour recovery is out of service, and record the outage
Reference notes from DropTubeBuilder, the offline field tool for fuel system technicians who cut overfill drop tubes, build tank charts and chase dispenser faults. It works with no cell signal, because the sites do not have any.
Get DropTubeBuilder on the App StoreThese notes are a field aid, not a substitute for the governing codes, the stamped drawings, the authority having jurisdiction, or manufacturer manuals. Verify against the current documentation for your installed equipment.