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The Eliwell SB655C is a robust controller that can be tailored to almost any medium or low-temperature refrigeration application. While the official manual is a dense technical document, understanding the logic behind the parameter groups (Regulation, Defrost, Fan) allows users to troubleshoot effectively and optimize energy efficiency.

Use the manual as a reference alongside a YouTube tutorial or an application note from Eliwell’s website (e.g., “SB655 C for cold room” if available).

Press and release to view or edit the target Setpoint. Press and hold for 5 seconds to enter the basic programming menu.

3-digit LED display with automatic minus sign and decimal point Resolution: 0.1°C or 1°C (selectable via parameters)

This complete guide serves as an in-depth resource and unofficial manual for the Eliwell SB655C. It covers everything from its primary functions and technical specifications to installation, programming, and troubleshooting.

Lit when a temperature or hardware alarm is active. 3. Basic Operation: Adjusting the Setpoint

3 or more relay outputs (Model specific configuration): Compressor Relay: Typically 8A or 15A resistive. Defrost Relay: 8A resistive. Evaporator Fan Relay: 8A resistive. Display Range: -50.0∘Cnegative 50.0 raised to the composed with power C

TYPICAL WIRING SCHEMATIC (Example Only) +---------------------------------------+ | 1 2 | 3 4 | 5 6 | 7 8 | 9 10 11 12| +---+--+---+--+---+--+---+--+-----+-----+ | | | | | | POWER COMP DEF FAN PROBE1 | INPUT RELAY RELAY RELAY (AMB) PROBE2 (DEF) Installation Steps Cut out a standard

: Reset active alarms by pressing UP + DOWN simultaneously. Common Troubleshooting Codes

If the controller behaves erratically due to misconfigured parameters, perform a hard reset:

The controller is programmed using a simple four-button interface (Up, Down, Set, Fnc).

Low-voltage (SELV) utilities must be wired separately from high-voltage lines to prevent electrical interference.

Use the or DOWN (▼) keys to scroll through the available parameters.