'Make Another Selection' Persists — Delivery Sensor Diagnosis
VendnetUSA Futura ADA Generic Combo
'Make Another Selection' Persists — Delivery Sensor Diagnosis
Investigates why the machine does not register a successful vend after product delivery, focusing on sensor path integrity, alignment, and harness connections.
Qualified technician handoff: stop before live electrical testing, sealed-system refrigeration work, compressor service, or protected-compartment access unless a qualified technician is handling the work.
- Sensor harness shows signs of heat damage or melted insulation: Do not re-energize until cause of overheating is identified and corrected.
Checklist
Guided Diagnostic Steps
Work from low-risk checks toward technician-level inspection only when evidence supports it.
You can read or print the route now. The first checkbox click opens the service contact gate.
- 1
Perform Test Vend
operator-intermediatelowSelect a product and observe the complete vend cycle from motor activation through product delivery. Note whether the product falls into the bin and whether the machine registers the vend.
Expected: Product drops cleanly into delivery bin and machine clears the selection screen.
Evidence to note: note
- 2
Clean Sensor Lenses
operator-intermediatelowWith power off, use a soft cloth to gently clean the emitter and receiver lenses in the delivery sensor area. Remove any product residue, dust, or labels that may be blocking the light path.
Soft Lint-Free ClothExpected: Sensor lenses are clean and light path is clear.
Evidence to note: photo
- 3
Verify Sensor Alignment and Repeat Test
operator-intermediatelowConfirm sensor brackets are secure and emitter/receiver are aligned. Power on and perform another test vend.
Flashlight or Work LightExpected: Machine registers the vend and clears the selection screen.
Evidence to note: note
- 4
Check Sensor Harness Continuity
operator-intermediatehighWith power off, disconnect the sensor harness at both the sensor and controller ends. Test continuity of each wire in the harness.
Digital MultimeterExpected: All harness wires show near-zero resistance continuity.
Evidence to note: meter-reading
Tools for this route
Location Help
Where to find this
Use this as orientation before touching the machine. It is location help, not a repair instruction.
Start at the customer delivery bin and product drop path; clear visible product and debris before moving to internal checks.
- Detects whether product has successfully dropped or reached the delivery bin, confirming vend completion or triggering refund/retry.
- Optical or infrared drop sensor
- Sensor harness
- Reflector or emitter bracket
Do not open energized or protected electrical areas unless a qualified technician or licensed electrician is handling the work.
cabinet glass front
wiring harness
display keypad
vend motorParts status
Exact public parts list not verified yet. Use this route to identify the system before ordering.
Candidate areas for part verification
Other Possible Issues
Switch routes if this symptom is not the closest match.