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Rocky Mountain Vending

Machine Completely Dead — Power Input Diagnostic

VendnetUSA VendnetUSA 4213388c

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Machine Completely Dead — Power Input Diagnostic

This diagnostic sequence helps determine if the unit is receiving power from the building supply or if the failure lies within the unit's internal power components.

High VoltageTechnician8-12 min
Power8 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.

  • Fuse blows immediately upon replacement: Stop all work. Do not re-energize. Escalate to advanced technician for short-circuit investigation.
  • Burning smell detected at any point: Unplug machine immediately. Tag out of service. Investigate only after machine is fully de-energized.
  • Live voltage measurement reading significantly outside expected range: Unplug machine. Do not reconnect until power supply is evaluated.
  • If live voltage measurement reading is significantly outside expected range, unplug the machine immediately. Do not reconnect until a qualified technician has evaluated the power supply.

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

    Use a known-good lamp or outlet tester at the wall outlet to confirm...

    technician-advancedlive-voltage

    Use a known-good lamp or outlet tester at the wall outlet to confirm power is present.

    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.

    Outlet TesterDigital MultimeterFlashlight or Work LightInsulated Safety Gloves
    Stop conditions
    • If live voltage measurement reading is significantly outside expected range, unplug the machine immediately. Do not reconnect until a qualified technician has evaluated the power supply.
    • If the fuse blows immediately upon replacement, stop all work. Do not re-energize. Escalate to an advanced qualified technician for short-circuit investigation.
    • If a burning smell is detected at any point, unplug the machine immediately and tag it out of service. Investigation must only occur after the machine is fully de-energized and assessed by a qualified technician.

    Expected: Initial condition is documented before deeper diagnosis.

    Evidence to note: note

  2. 2

    Unplug the machine and visually inspect the entire length of the powe...

    technician-advancedlive-voltage

    Unplug the machine and visually inspect the entire length of the power cord for any signs of damage.

    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.

    Outlet TesterDigital MultimeterFlashlight or Work LightInsulated Safety Gloves
    Stop conditions
    • If live voltage measurement reading is significantly outside expected range, unplug the machine immediately. Do not reconnect until a qualified technician has evaluated the power supply.
    • If the fuse blows immediately upon replacement, stop all work. Do not re-energize. Escalate to an advanced qualified technician for short-circuit investigation.
    • If a burning smell is detected at any point, unplug the machine immediately and tag it out of service. Investigation must only occur after the machine is fully de-energized and assessed by a qualified technician.

    Expected: Initial condition is documented before deeper diagnosis.

    Evidence to note: note

  3. 3

    Use a known-good lamp or outlet tester at the wall outlet to confirm...

    technician-advancedlive-voltage

    Use a known-good lamp or outlet tester at the wall outlet to confirm power is present.

    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.

    Outlet TesterDigital MultimeterFlashlight or Work LightInsulated Safety Gloves
    Stop conditions
    • If live voltage measurement reading is significantly outside expected range, unplug the machine immediately. Do not reconnect until a qualified technician has evaluated the power supply.
    • If the fuse blows immediately upon replacement, stop all work. Do not re-energize. Escalate to an advanced qualified technician for short-circuit investigation.
    • If a burning smell is detected at any point, unplug the machine immediately and tag it out of service. Investigation must only occur after the machine is fully de-energized and assessed by a qualified technician.

    Expected: Result is documented before continuing the route.

    Evidence to note: note

  4. 4

    Unplug the machine and run hands along the power cord feeling for sof...

    technician-advancedlive-voltage

    Unplug the machine and run hands along the power cord feeling for soft spots or kinks.

    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.

    Outlet TesterDigital MultimeterFlashlight or Work LightInsulated Safety Gloves
    Stop conditions
    • If live voltage measurement reading is significantly outside expected range, unplug the machine immediately. Do not reconnect until a qualified technician has evaluated the power supply.
    • If the fuse blows immediately upon replacement, stop all work. Do not re-energize. Escalate to an advanced qualified technician for short-circuit investigation.
    • If a burning smell is detected at any point, unplug the machine immediately and tag it out of service. Investigation must only occur after the machine is fully de-energized and assessed by a qualified technician.

    Expected: Result is documented before continuing the route.

    Evidence to note: note

  5. 5

    Locate the main fuse holder or circuit breaker and test continuity wi...

    technician-advancedlive-voltage

    Locate the main fuse holder or circuit breaker and test continuity with a multimeter.

    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.

    Outlet TesterDigital MultimeterFlashlight or Work LightInsulated Safety Gloves
    Stop conditions
    • If live voltage measurement reading is significantly outside expected range, unplug the machine immediately. Do not reconnect until a qualified technician has evaluated the power supply.
    • If the fuse blows immediately upon replacement, stop all work. Do not re-energize. Escalate to an advanced qualified technician for short-circuit investigation.
    • If a burning smell is detected at any point, unplug the machine immediately and tag it out of service. Investigation must only occur after the machine is fully de-energized and assessed by a qualified technician.

    Expected: Result is documented before continuing the route.

    Evidence to note: note

  6. 6

    Access the low-voltage output side of the power supply and measure ou...

    technician-advancedlive-voltage

    Access the low-voltage output side of the power supply and measure output voltage using a multimeter for a qualified technician.

    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.

    Outlet TesterDigital MultimeterFlashlight or Work LightInsulated Safety Gloves
    Stop conditions
    • If live voltage measurement reading is significantly outside expected range, unplug the machine immediately. Do not reconnect until a qualified technician has evaluated the power supply.
    • If the fuse blows immediately upon replacement, stop all work. Do not re-energize. Escalate to an advanced qualified technician for short-circuit investigation.
    • If a burning smell is detected at any point, unplug the machine immediately and tag it out of service. Investigation must only occur after the machine is fully de-energized and assessed by a qualified technician.

    Expected: Result is documented before continuing the route.

    Evidence to note: note

  7. 7

    Locate the door interlock switch and verify its state changes when op...

    technician-advancedlive-voltage

    Locate the door interlock switch and verify its state changes when opening and closing the door.

    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.

    Outlet TesterDigital MultimeterFlashlight or Work LightInsulated Safety Gloves
    Stop conditions
    • If live voltage measurement reading is significantly outside expected range, unplug the machine immediately. Do not reconnect until a qualified technician has evaluated the power supply.
    • If the fuse blows immediately upon replacement, stop all work. Do not re-energize. Escalate to an advanced qualified technician for short-circuit investigation.
    • If a burning smell is detected at any point, unplug the machine immediately and tag it out of service. Investigation must only occur after the machine is fully de-energized and assessed by a qualified technician.

    Expected: Result is documented before continuing the route.

    Evidence to note: note

  8. 8

    Test the main fuse or circuit breaker continuity with a multimeter.

    technician-advancedlive-voltage

    Test the main fuse or circuit breaker continuity with a multimeter.

    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.

    Outlet TesterDigital MultimeterFlashlight or Work LightInsulated Safety Gloves
    Stop conditions
    • If live voltage measurement reading is significantly outside expected range, unplug the machine immediately. Do not reconnect until a qualified technician has evaluated the power supply.
    • If the fuse blows immediately upon replacement, stop all work. Do not re-energize. Escalate to an advanced qualified technician for short-circuit investigation.
    • If a burning smell is detected at any point, unplug the machine immediately and tag it out of service. Investigation must only occur after the machine is fully de-energized and assessed by a qualified technician.

    Expected: Result is documented before continuing the route.

    Evidence to note: note

Tools for this route

Outlet TesterDigital MultimeterFlashlight or Work LightInsulated Safety Gloves

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 CordsFusesLow-Voltage Power SuppliesController BoardsDisplays

Other Possible Issues

Switch routes if this symptom is not the closest match.

All issues
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