The Eliwell SB655/C is a microprocessor controller primarily used for managing centralised air-conditioning units, including chillers and heat pumps with up to two circuits and multiple compressor stages. Core Manuals & Technical Documentation
For a "good guide," you should refer to these official documents:
SB 655 Installation and Programming Manual: This is the most direct technical guide covering digital/analogue output configurations, parameter downloading via programmed keys, and internal byte maps.
Eliwell Energy ST/SB Series User Manual: A comprehensive guide (specifically starting on page 26 for SB655) that detail the microprocessor’s role in refrigeration circuits and electrical data requirements.
Energy Flex SB 655/C/S Datasheet: Provides a high-level overview of capabilities like Modbus/Televis support, intelligent compressor management, and "Free Cooling/Free Heating" functions. Key Operations Overview Operational Detail Compressor Support eliwell sb655 c manual
Manages Scroll, Semi-Hermetic, or Screw compressors (up to 4 steps) with balanced operation hours. Programming
Uses a "Copy Card" or "Multi Function Key" (MFK) for quick parameter uploads/downloads. Interface
DIN rail mounting designed for centralized unit control with Modbus communication. Menu Access
Typically involves holding specific key combinations to enter folders like PAR (parameters) or FnC (functions). Troubleshooting & Configuration Tips The Eliwell SB655/C is a microprocessor controller primarily
Parameter Changes: It is strongly recommended to switch the device off and on after changing configurations to prevent timing malfunctions.
Alarms: If you see alarm codes like AL1 (Low temp) or AH1 (High temp), check the probe readings and the HA1/LA1 limit parameters in the Machine Status menu.
Universal Password: Most Eliwell controllers use a default installer password of 15 (labeled PA2) to unlock full parameter settings.
Electronic controllers for centralised air-conditioning units View Setpoint: Press and release SET → shows
OFF).In the world of refrigeration and HVAC control, few names carry as much weight as Eliwell, a brand now part of the Schneider Electric family. Among their most iconic and widely used products is the Eliwell SB655 C. This parameterizable electronic controller is the brain behind countless commercial refrigerators, freezer rooms, beverage coolers, and industrial refrigeration units.
If you have landed on this page searching for the "Eliwell SB655 C manual", you are likely facing one of three scenarios: you are installing a new unit, you need to reprogram an existing controller after a power surge, or your refrigeration unit is displaying an error code and beeping incessantly.
This comprehensive article serves as an extended manual. We will cover everything from hardware overviews and wiring, to programming parameters, common error codes, and where to find the official PDF manual.
rSt (Restore).1 and press SET.The Eliwell SB655C is a microprocessor-based digital controller designed for temperature control in medium/low temperature refrigeration units, cold rooms, and HVAC systems. It features a dual display (setpoint/actual temperature), relay outputs for compressor and defrost, and configurable parameters.
Key Features: