Check torch switch and P13 trigger wiring.
Fault route
MIG200DL Trigger But No Output Diagnostic
A no-output route for MIG200DL welders when trigger response exists but welding output is missing.
Quick Answer
For MIG200DL trigger but no welding output, verify the trigger path, DC540V bus to P12, power-board P11/P16 control supply, control-board P1/P2 drive output and output connections.
- A valid torch trigger alone is not enough; P12 DC540V must reach the power board.
- P11/P16 separate power-board-to-control-board signal and working power.
- P1/P2 drive output decides whether the inverter board is being commanded.
Use this page when
- Torch trigger gives some response but no welding output.
- Wire/gas may work but arc output is missing.
- P12, P11/P16 and P1/P2 evidence can be checked.
Do not use this page when
- Torch trigger produces no response at all.
- Only wire feed is missing.
- Breaker trips at power-on.
MIG200DL trigger-no-output route
Move from trigger input to DC bus, control supply, drive output and output connection.
Bottom board must feed DC540V into the power board.
Power board provides control signal and working power to control board.
Control board should output drive signal to inverter board.
Loose output wiring can mimic no-output condition.
No-output evidence table
| Evidence point | Expected / abnormal evidence | Repair direction |
|---|---|---|
| P13 trigger input | Trigger path open prevents normal work command. | Repair torch switch/wiring if open. |
| P12 | DC540V should be present from bottom board. | If missing, inspect bottom board/DC bus. |
| P11 / P16 | Power-board control signal and working power should reach control board. | If missing, inspect power board. |
| P1 / P2 | Drive signal should go from control board to inverter board. | If missing after valid inputs, inspect control board. |
| Output connection | Loose connection prevents real welding output. | Repair connection after drive evidence is checked. |