CoolArc200 Input-Sense Answer Key

Drill

• CoolArc200 input-sense drill

Correct First Proof Step

• prove actual connected input voltage and mode state before treating low OCV as failure

Acceptable Document Order

1. CoolArc200 measurement card
2. CoolArc200 fault workflow router
3. CoolArc200 board opening map only if J3 and state proof still leave a machine-side fault

Required Takeaways

• J3 pins 2 and 7 are the clean split between input sense and control indication
• VRD and first-weld wake-up behavior can make low OCV normal
• fan-start oddities should stay in the fan branch before deeper board calls

Failing Moves

• calling every low-OCV complaint a bad output section
• opening the machine before input and mode story are clean
• ignoring startup blink evidence

Passing Answer Summary

• A correct answer proves actual input and state first, uses J3 to separate the sense branch from the control branch, and only opens the machine if those checks still point to a real internal fault.