A: That is not an error. The display is showing that the compressor is in a minimum off-time delay (parameter dLy). It is protecting the compressor from short cycling. The countdown value will appear (e.g., “3” for 3 minutes remaining).

The Eliwell SB655 C manual provides instructions for operating the device:

Install a 0.5A fast-acting fuse on the live (L) line of the controller's power supply. 3. User Interface and Navigation

The Eliwell SB655 C is a specialized electronic controller widely used in commercial refrigeration, cold storage, and heating applications. This industrial-grade thermostat regulates temperature with precision, managing compressors, fans, and defrost cycles.

Relay 1 (Compressor/Main Load): SPST 16A (res.) / 10A (ind.) at 250V AC. Relay 2 (Defrost): SPDT 8A at 250V AC. Relay 3 (Evaporator Fans): SPST 8A at 250V AC. Relay 4 & 5 (Alarms/Auxiliary): SPST 5A at 250V AC.

The SB655C is operated via a that offer clear and intuitive navigation, even from a distance.