If you notice unusual noise and hot operation of condenser pump #1, what should you do?

Choosing to turn on pump #2, shut off pump #1, and troubleshoot pump #1 is the most appropriate response when you notice unusual noise and hot operation of condenser pump #1. This method prioritizes safety and operational continuity.

By activating pump #2, you ensure that the system maintains necessary circulation and cooling while addressing the issue with pump #1. Shutting off pump #1 is crucial because it prevents potential damage to the pump due to overheating and noise, which may indicate a mechanical failure or blockage.

Troubleshooting pump #1 after shutting it down is the best approach, as it allows a thorough inspection to identify and rectify the issue without risking further damage to the pump or the system. This step could involve checking for blockages, ensuring proper lubrication, or assessing electrical connections.

Turning off the main power supply might disrupt all operations, which is not ideal for maintaining system function. Repairing the pump immediately without first shutting it down and assessing the issue could be dangerous and may not address the root cause of the problem. Increasing the flow rate in the system could exacerbate the issue with pump #1 and is unlikely to resolve the underlying problem causing the unusual noise and heat.