Рет қаралды 34,591
This York Predator RTU had a problem engaging first stage cooling during the maintenance. The main control board was only bringing on the 2nd stage compressor on a call for Y1. I traced the control circuit through the economizer board back to the main board during the troubleshooting process. These old York Predators are known for issues due to a negatively pressurized electrical panel that draws in water.
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