The Eliwell SB655 C separates parameters into two directories: User Parameters (Level 1) and Installer Parameters (Level 2 password-protected). Accessing the Installer Menu
: Includes automatic summer-winter changeover and "Free Cooling/Heating" logic to optimize energy based on outdoor conditions. User Interface & Navigation
When the Eliwell SB655 C encounters a system fault, it flashes an error code on the LED display.
If you have an old SB655 C that is failing (e.g., dim display, EE error), do not throw it away until you have read the parameters. Replacements (like the newer Eliwell ID 974 or iDR series) are available, but you need the old settings. eliwell sb655 c manual
This controller is designed to be the brain of a modern climate control system. Common applications include:
2 PTC or NTC thermistor probes (configurable via parameters).
The SB655C is designed for easy interaction, with all key functions accessible via four buttons. The Eliwell SB655 C separates parameters into two
: Ensure you are reading the temperature correctly. On the display, the decimal point for the tenth of a degree is always in the lower section of the screen. An LED in the upper part can be mistaken for a decimal separator. Also, confirm that no external switches or the Economy function (which uses OSP ) are inadvertently shifting the target temperature.
To change a value, press , adjust with arrows, and press SET again to store it. Critical Parameters to Monitor:
: The SB655/C natively supports Modbus RTU and Televis , allowing for remote monitoring and integration into building management systems. If you have an old SB655 C that is failing (e
What are you cooling? (e.g., meat, dairy, frozen foods) What error code or behavior is the unit currently showing? What is the exact voltage of your system?
Need the official manual? You can often find it on the product page of major distributors like Ahlsell or Cubic, or via the 'myEliwell' mobile app.