Board reference

WSM-315 control panel behavior reference

A TIG control-panel service reference for WSM-315 welders, focused on timing, current command and protection-code evidence.

Front-panel behavior

This page is for controls, settings and operator-facing behavior

Use this page to understand how the WSM-315 front panel settings affect welding behavior: pulse controls, upslope/down-slope, crater/end current, timing settings, mode behavior and service-code interpretation. For PCB-level connector or potentiometer evidence, use the panel board reference.

Which WSM-315 panel/control page should you use?

These pages are intentionally split. The control-panel page explains front-panel behavior and settings; the panel-board page covers PCB/connectors; the control-board page covers the main signal router between torch, gas, HF, current command, feedback and protection.

Control panel behaviorUse for knobs, mode behavior, upslope/down-slope, crater/end current, timing settings and service-code interpretation. Panel board PCBUse for panel PCB, front-panel connector, potentiometer/switch signals, indicators and board-level evidence. Main control boardUse for torch input, gas timing, HF command, current command, feedback and protection routing. No HF / no arc routeUse when starting from a field symptom such as gas-only, no HF, no main current or pedal no response.

Quick Answer

The WSM-315 control panel should be read as a process-control interface: 2T/4T, pre-flow, start, upslope, base current, crater/end current, post-flow and protection-code evidence.

Use this page when TIG behavior follows the wrong timing sequence or panel settings do not match machine behavior.
Do not replace the HF board before checking whether the panel/control board is commanding HF, gas and current timing correctly.
Protection code evidence should be interpreted before changing power-stage parts.

WSM-315 panel control evidence

Panel function	Service meaning	Related symptom
2T / 4T mode	Torch switch latching and release behavior.	Machine starts/stops at wrong time.
Pre-flow / post-flow	Gas timing before and after current.	Gas too early, too late or absent.
Start / upslope	Start-current and ramp behavior.	Arc starts but current does not ramp normally.
Base / peak current	Pulse or current command layer.	Current cannot adjust or is unstable.
Crater / end current	Arc-ending behavior.	Crater fill/end current abnormal.
Protection code	Panel-side clue for fault classification.	Do not interpret all codes as power-device failure.

Related records

Related diagnostics

Open the timing or HF route after reading panel evidence.

TIG 2T/4T and gas/HF timing routeUse for sequence problems.WSM-315 control board referenceUse for panel-to-board signal layer.WSM-315 HF arc-start boardUse if panel command is valid but HF path fails.