Why do you wait to perform checks, service or maintenance on coolant systems on a MEO until it cools down?

Waiting for a coolant system to cool down before performing checks, service, or maintenance is crucial primarily because of the risks associated with pressure and steam. When a coolant system is operational, it contains hot fluids under pressure that can be dangerous. If maintenance is attempted while the system is still hot, there is a significant risk of steam leaks or bursts, which can lead to severe injuries such as burns.

Handling equipment that is still warm or under pressure can expose a technician to high temperatures and aggressive steam jets, making safety a primary concern. By allowing the system to cool down, those risks are significantly minimized, ensuring a safer working environment while performing necessary service or maintenance tasks.

Other considerations like equipment efficiency might be important, but the immediate concern is always the safety of personnel. Therefore, performing maintenance only on cooled systems is a standard safety protocol in such situations.