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Rocky Mountain Vending

Machine Completely Dead – Power Input and Supply Check

VendnetUSA 3537 / 3538 / 3535 / 3536

Cold DrinkMedium confidenceExact parts not verified
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Machine Completely Dead – Power Input and Supply Check

Systematic isolation from wall outlet through power cord, line fuse, and low-voltage supply to determine why the machine shows no signs of life.

High VoltageOperator5-10 min
Power4 stepsoperator-intermediate

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.

  • Fuse blows immediately after replacement: Stop. Do not install another fuse. Full short-circuit investigation required by qualified technician.
  • Burning smell or visible smoke at any point: Unplug immediately. Do not re-energize until fault is located.

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 Wall Outlet

    operator-intermediatelow

    With the machine unplugged, confirm the wall outlet provides power using a known-good lamp or outlet tester.

    Expected: Outlet tester indicates correct wiring and voltage present.

    Evidence to note: meter-reading

  2. 2

    Inspect Power Cord

    operator-intermediatelow

    Unplug machine. Visually inspect the full length of the power cord. Feel for soft spots indicating internal damage.

    Expected: Cord jacket intact, no burns, cuts, or kinks.

    Evidence to note: photo

  3. 3

    Check Line Fuse

    operator-intermediatelow

    With machine unplugged and panel open, locate the line fuse. Remove and check continuity with multimeter.

    Stop conditions
    • Fuse blown and blackened glass – indicates significant short, do not simply replace fuse

    Expected: Fuse shows continuity (near zero ohms).

    Evidence to note: meter-reading

  4. 4

    Measure Low-Voltage Supply Output

    technician-advancedlive-voltage

    With machine plugged in and panels safely positioned, measure DC voltage at the low-voltage power supply output. Maintain safe distance from primary-side components.

    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 burnt components or swollen capacitors – unplug immediately

    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 at the customer delivery bin and product drop path; clear visible product and debris before moving to internal checks.

  • Brings main AC line voltage into the machine and distributes to power supply and compressor branch.
  • Power cord
  • Line fuse or circuit breaker
  • EMI filter

Do not open sealed-system or compressor areas unless a qualified refrigeration technician is handling the work.

cabinet drinkrefrigeration baycompressorpower supply

Parts status

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

Candidate areas for part verification

Power componentsPower CordLine FuseLow-Voltage Power SupplyMain Controller BoardDisplay and Keypad Assembly

Other Possible Issues

Switch routes if this symptom is not the closest match.

All issues
CoolingCompressor Not Running – Refrigeration CheckVend pathSingle Vend Motor Will Not TurnDelivery sensorDelivery sensor or bin problemPaymentsPayment or money acceptance problemWater / fittingsWater Flow or Fitting Service