How do I tell what the temp of the water, supply and return, was at the time of a fault on an W/M Ultra boiler?
You can unlock the panel and go to error and proceed with hitting the step button to obtain: 1) error code; 2) state of operation when the error occurred e.g stdby , ignition , etc.; 3) supply water temp at time of error; 4) return water temp at time of error; 5) whether the boiler was in a dhw call for heat or a boiler call for heat; and 6) outdoor temp at the time of error if the sensor is hooked up.
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