Anyone have a recommendation for an advanced, hands‑on ECM and inverter drive diagnostics class that goes past swap‑tronics into scope work and signal interpretation on 24V/communicating systems? I’m 28 years in and want something that cuts time on no‑cool calls with variable‑speed blowers — quick go/no‑go checks, expected waveforms, and real failure trees. I’m in Columbus, can travel 2–3 hours on a Saturday, and I’m currently using a Hantek 2‑channel and a Fluke 87V; CEUs are a plus — what’s been worth your money?
@BryanOrr’s HVACR School runs traveling hands‑on scope labs for ECM and communicating systems — check the calendar here: Events; it’s night‑vision for no‑cool calls. Quick step I use: confirm line power and a stable DC bus to the module, then scope the control and tach (if present) at the board and at the motor to compare command vs feedback before blaming the wheel. Are you in Columbus OH or CA, and can you travel a few hours if the good classes aren’t in town?
Since you’re in Columbus, check Copeland’s Education Center up in Sidney — their inverter/BLDC diagnostics lab puts you on the scope for 24V and communicating signals: https://education.copeland.com. Fast check I use on variable‑speed blowers: scope the control line at the motor; a steady 5V PWM that ramps with call/static points me at the motor, garbage or flatline sends me back to the board or wiring. If you want brand‑neutral vs factory, pick the fundamentals sessions; the brand‑specific ones go deeper on their failure trees.