In the event of losing one SIV, what happens to the train’s air conditioning system?

When one System Inverter (SIV) is lost, the train's air conditioning system does not shut down entirely. Instead, it continues to operate, albeit at a reduced capacity. This is designed to ensure that passengers remain comfortable and that the train can still function effectively, even with the loss of one power source. The air conditioning system is typically engineered to have redundancy and flexibility, allowing it to adapt to such situations while still providing essential service.

Operating at reduced capacity may involve adjusting the cooling power provided or using a secondary supply, such as the backup systems or remaining inverters, which allows for some level of temperature control and climate comfort within the train. This approach reflects a fundamental design principle in railway systems, emphasizing safety and passenger comfort while maintaining operational efficiency.