P40 Fault Workflow Router

This router gives the fastest document order for the highest-value P40 complaints.

Complaint Routing

Incoming complaint	Open first	Then open	Then open if the complaint remains	Why this order works
no HF or very weak HF	P40 measurement card	P40 parts substitution card	P40 board opening map	gap and support-voltage proof come first, then torch-stack proof, then the HF board map
HF is present but there is no OCV or only occasional OCV	P40 measurement card	P40 board opening map	P40 job packet	the measurement card separates the support rail first, then the opening map routes into the control branch
air flows but the machine will not cut	P40 parts substitution card	P40 measurement card	P40 board opening map	torch stack and clamp are still the fastest false-fault branches on this model
air flows immediately on power-up or keeps flowing unexpectedly	P40 measurement card	P40 board opening map	P40 guide	this keeps trigger, solenoid, and control branching ahead of random torch replacement
cut quality is poor but start and transfer still work	P40 parts substitution card	P40 measurement card	P40 guide	the fastest false-fault branches here are consumables, air quality, and contamination rather than boards
fan or low-voltage supply drifts badly when warm	P40 measurement card	P40 board opening map	P40 guide	the support-supply proof should push directly into the main-power map when the symptom stays machine-side

Official Parts Exit Paths

If the complaint proves external at any point in the router, use the official parts flow instead of continuing into board work.
P40 accessories entry: official accessories path
SG55 electrode 07Y2517003: official product page
SG55 tip 07Y2517005: use the official P40 accessories path above.
Manual cross-check: official P40 owner manual

Stop Rules

Stop if a fresh torch stack or clean clamp restores normal cut behavior.
Stop if the complaint disappears once the HF gap, air path, or contamination branch is corrected.
Stop if pressure under flow is not staying around 65 psi / 4.5 bar.
Stop and move to the full guide if HF, OCV, and cut-quality symptoms remain mixed after the first pass.

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