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Rocky Mountain Vending

No Power to Machine — Internal Diagnosis

AMS Sensit II Glass Front Vendor

SnackMedium confidenceExact parts not verified
Back to all issues

No Power to Machine — Internal Diagnosis

Systematic check from confirmed-good wall outlet through the machine's power input path to isolate power interruption

High VoltageTechnician5-10 min
Power2 stepstechnician-advanced

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.

  • Arc damage found: Stop immediately. Tag out machine. Licensed electrician required.
  • Repeated fuse failure: Stop. Do not re-fuse. Full short-circuit investigation required.
  • Burning smell at any point: Unplug immediately. Do not re-energize. Tag out and hand off.

Checklist

Guided Diagnostic Steps

Work from low-risk checks toward technician-level inspection only when evidence supports it.

Printable checklist

You can read or print the route now. The first checkbox click opens the service contact gate.

lead gated
  1. 1

    Verify incoming voltage at terminal block

    technician-advancedlive-voltage

    With the machine unplugged, remove the lower rear panel to access the terminal block. Inspect all connections visually. If no damage is visible and you are qualified, plug in the machine and carefully measure voltage at the terminal block input.

    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.

    Stop conditions
    • any-sign-of-arc-damage
    • loose-terminal-with-heat-discoloration

    Expected: Nominal line voltage present at the terminal block input lugs

    Evidence to note: meter-reading

  2. 2

    Check main fuse or circuit protection

    operator-intermediatehigh

    Locate any fuse or circuit protection device on the power supply or control board. Test for continuity with power disconnected.

    Stop conditions
    • fuse-blown-repeatedly-after-replacement

    Expected: Fuse or breaker shows continuity or is in the closed/tripped-reset position

    Evidence to note: meter-reading

Tools for this route

No special tools listed

Location Help

Where to find this

Use this as orientation before touching the machine. It is location help, not a repair instruction.

Power Input

Start outside the machine at the outlet and cord, then identify the power entry area before any protected-compartment inspection.

  • Receives and distributes main line voltage to the vendor power supply
  • power-cord
  • main-terminal-block
  • circuit-breaker-or-fuse

Do not open energized or protected electrical areas unless a qualified technician or licensed electrician is handling the work.

cabinet glass frontpower supplyterminal block

Parts status

Exact public parts list not verified yet. Use this route to identify the system before ordering.

Candidate areas for part verification

Power componentsControl Boards and Program ChipsVend MotorsTemperature and Product SensorsInterior Lighting ComponentsHelix Coils and Tray Assemblies

Other Possible Issues

Switch routes if this symptom is not the closest match.

All issues
CoolingCompressor Will Not Run — Refrigeration FaultDelivery sensorDelivery Sensor Diagnosis — Remove Product StuckVend pathSingle Column Vend FailureControllerController or electronics problemDoor / lockDoor, latch, or lock problem