Passage: A remote mountain telecommunications relay station relies on a primary solar array and a backup diesel generator equipped with an automated power management unit. When solar output drops below critical operating thresholds for more than thirty consecutive minutes, the unit is programmed to initiate a tiered conservation and failover sequence. First, auxiliary climate control and non-essential telemetry transmitters are powered down to preserve stored battery reserves. Next, if solar irradiance does not recover within ten minutes of initial load shedding, the system triggers the generator's pre-heat cycle and starter motor. Once the diesel generator stabilizes at its rated rotational speed, the automated transfer switch disconnects the depleted battery bank and routes emergency electrical power directly to the primary communications transceivers.
Based on the passage, arrange the projected automated sequence of events in chronological order from first to last following a prolonged drop in solar output.
- 1Auxiliary climate control and non-essential telemetry systems are powered down.
- 2The power management unit engages the diesel generator's pre-heat cycle and starter motor.
- 3The backup diesel engine reaches and stabilizes at its rated rotational operating speed.
- 4The automated transfer switch routes generator power directly to the primary transceivers.