No Power Diagnostic Flow
Other PV 800 Combo
No Power Diagnostic Flow
Systematic checks to identify why the machine has no electrical power, starting from the wall outlet and working inward
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.
- scorch_marks_or_burning_smell_detected: stop_and_escalate
- water_intrusion_near_power: stop_and_escalate
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
Verify outlet has power
operator-intermediatelowUse a known-good outlet tester or plug a known-good device into the same outlet to confirm the outlet is energized.
Outlet TesterStop conditions- outlet_shows_wiring_fault
- scorch_marks_on_outlet
Expected: Outlet tester indicates correct wiring and voltage present
Evidence to note: meter-reading
- 2
Inspect terminal block connection
operator-intermediatehighWith the machine unplugged, remove the rear or lower access panel to expose the terminal block. Visually confirm the power cord wires are secure and show no signs of overheating.
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.
Flashlight or Work LightScrewdriver SetStop conditions- discolored_terminal
- loose_wire_arcing_evidence
- burning_smell
Expected: All terminal block connections are tight with no discoloration
Evidence to note: photo
- 3
Check main fuse or circuit breaker
operator-intermediatehighLocate the main fuse holder or circuit breaker. With power disconnected, check fuse continuity. If a breaker, verify it is in the ON position.
Digital MultimeterStop conditions- fuse_blown_repeatedly
- discoloration_around_fuse_holder
Expected: Fuse shows continuity or breaker is in ON position
Evidence to note: meter-reading
- 4
Check controller board fuse
operator-intermediatehighLocate the fuse on or near the main controller board. With power disconnected, check continuity.
Digital MultimeterFlashlight or Work LightStop conditions- burning_smell_near_controller
- visible_board_damage
Expected: Controller fuse shows continuity
Evidence to note: meter-reading
- 5
Check controller power LED
operator-intermediatehighRestore power to the machine and observe the controller board for any power indicator LED or display activity.
Flashlight or Work LightExpected: Power LED illuminates or display shows activity
Evidence to note: photo
- 6
Clear drawer track obstructions
operator-intermediatelowOpen the drawer fully if possible. Using a flashlight, inspect both track channels for debris, fallen product pieces, or foreign objects. Remove any obstructions carefully.
Flashlight or Work LightCleaning ClothStop conditions- sharp_bent_metal
Expected: Tracks are clear of debris and drawer slides freely
Evidence to note: note
- 7
Lubricate drawer tracks
operator-intermediatelowApply a small amount of silicone-based lubricant to the drawer track channels. Avoid petroleum-based products that may degrade plastic components. Test drawer travel.
Cleaning ClothSilicone-based LubricantExpected: Drawer slides smoothly with reduced friction
Evidence to note: note
- 8
Inspect door seal and gasket
operator-intermediatelowClose the door on a thin piece of paper at multiple points around the perimeter. The paper should be gripped firmly. Check for cracks, tears, or permanent deformation in the gasket.
Flashlight or Work LightExpected: Gasket holds paper snugly at all test points with no visible damage
Evidence to note: photo
- 9
Clean condenser coil
operator-intermediatelowWith the machine powered off, use a coil brush and vacuum to remove dust and debris from the condenser coil fins. Brush in the direction of the fins to avoid bending them.
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.
Condenser Coil BrushStop conditions- fins_already_damaged
- oily_residue_on_coil
Expected: Condenser fins are visibly clean with open airflow passages
Evidence to note: photo
- 10
Initial compressor circuit checks
technician-advancedlive-voltageWith power on, listen for any hum or click at the compressor. If completely silent, check for power at the compressor relay or overload protector. Do not bypass any safety devices.
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.
Digital MultimeterStop conditions- burning_smell
- unusual_compressor_noise
- refrigerant_oil
Expected: Power is present at compressor electrical terminals
Evidence to note: meter-reading
- 11
Power restored — confirm all functions
operator-intermediatelowWith power restored, verify the display is active, the keypad responds, the cooling system activates, and a test vend completes successfully.
Expected: All primary machine functions operate normally
Evidence to note: note
- 12
Drawer operation restored — verify
operator-intermediatelowCycle the drawer through its full range of travel multiple times to confirm smooth operation. Load product and verify the drawer operates correctly under loaded conditions.
Expected: Drawer operates smoothly loaded and unloaded
Evidence to note: note
Tools for this route
Parts 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.