P2
Its ok, relax there heli pilot, might want to read your flight manual.
When you turn on the heat it opens the P2 gate valve which takes bleed air from the engine for heat in the cockpit. That is why you see the amber flag on the VEMD, this is here due to the use of P2 bleed air is forbidden above the max cont rating for NG or T4.
Good idea to turn off your heat for takeoff and landing.
Hope that helps.