Eliwell Sb655 C Manual Best -

The device operates using two levels of parameters to prevent accidental changes. Level 1 (User): Set Point: The target temperature. Differential (H01): The "swing" before the compressor kicks back on. Level 2 (Installer): Accessed by holding "Set" and "Down" for several seconds.

Alarms can often be reset by holding the keys simultaneously. "OFF" Display eliwell sb655 c manual best

The "best" manual explains that you need to access the Configuration level (Pr2), not just the User level (Pr1). The device operates using two levels of parameters