CoolCut40air Board Opening Map

This is the fast internal opening map for CoolCut40air once torch, clamp, and air-package branches are already bounded.

Open Only After Proving

SG55 front-end stack is already proven
internal-air and external-air modes are already separated
moisture, water-trap, and clamp issues are already ruled out
backward purge or valve-cleaning response is already checked

First Internal Targets

Board or internal group	Open first when...	Key connector or checkpoint	Best local file to open first
Valve-control branch	both air paths flow together or the wrong path opens	valve-control logic and dual-air behavior	`CC40AIR_DIAGRAM.tif` and `W.496RM.410-C.pdf`
External solenoid contamination branch	internal mode wrongly vents through the rear path	external-valve contamination versus drive signal	workbook sheet `coolcut40air` and `W.496RM.417-A.pdf`
Main control or power branch	both modes still fail after the air package is proven healthy	common power or control branch	`W.496RM.419-C.pdf` and owner manual

Connector and Board-Family Reminders

Keep internal-mode-only and external-mode-only complaints separated.
Do not call the control board bad until valve contamination is ruled out.
Use the air-package files before moving into general plasma-board blame.
Do not open the machine while backward purge or valve cleaning still changes the symptom.

External Parts Exit Paths

If the opening pass shows the complaint still follows the torch-front-end or air-package branch, leave the board path and use the official ordering flow instead.
CoolCut40air parts category: official parts path
SG55 electrode 07Y2517003: official product page
SG55 nozzle 07Y2517004: official product page
SG55 tip 07Y2517005: use the official parts path above.

Stop Rules

Stop if the complaint exists in only one air mode.
Stop if a dry-air or valve-cleaning branch changes the symptom immediately.
Stop if backward purge restores normal air-path behavior even briefly.
Stop and return to the full guide if mode split, valve behavior, and power evidence still overlap after the first opening pass.

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