So, in this helicopter you have to watch the Voltage as well as the engine parameters.
I was also taught (on Astazous III and XIV , but with 'manual' two step start) when starting to look for voltage, but as an indicator of spark igniter readiness to fire. It wasn't working properly below 16V, and that starter could pull hard, especially with weak battery. So the 'after 2000 RPM, switch to ignite' became 'after above 16V switch to ignite' sequence.