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Errors


Boiler type Hydra Smart RTC-199

Error code Er:73

Cause:

DIP Switch is abnormal

Solution:

This Error Code will go away when the condition is remedied.
If Error happens again:

- Check dip switches. Ensure switches match the ratings plate requirements of the water heater. See dip switch details, this manual, for default settings.

- If the problem persists, replace the main control.