Alarm 233

This alarm is raised when Domestic Hot Water Temperature (DHWT) sensors indicate a too different value.
These sensors are located at the heat exchanger outlet on the domestic water side (front side).

Check t2 and t3 values in the Info screen (Info) of the Touchscreen.

Are t2 and t3 less than 2°F (3°C) apart?

Yes No

NOTICE: If Err is displayed, the value is not in the expected range.