Built-in Free Cooling and Free Heating, along with power limitation functionality.
3-digit LED display with minus sign and status icons
Analogue inputs (AIE) must be configured correctly, with options for probe calibration. Key Components
Keywords: Eliwell SB655C manual, pressure controller wiring, SB655C parameters, refrigeration troubleshooting, HVAC digital pressure switch.
Before attempting to repack parameters, ensure the unit is powered and the probe is connected (to prevent sensor errors). eliwell sb655 c manual repack
The Eliwell SB655C features a simple and intuitive interface:
The stands as one of the most reliable parametric controllers for small to medium centralized HVAC systems, chillers, and heat pumps. Designed by Eliwell by Schneider Electric , this unit manages complex operations including dual-circuit cooling, multi-stage compressor configurations, and variable frequency drives (VFD).
: Features an integrated Real-Time Clock (RTC) (denoted by the /C suffix), automatic summer-winter changeover, and support for free cooling/heating.
Step Management: Controls capacity steps based on load requirements. Built-in Free Cooling and Free Heating, along with
The is a powerful, universal controller specifically engineered for multi-circuit systems, making it the backbone of modern chiller and reversible heat pump applications. It excels in managing units with complex hydraulic circuits, allowing for sophisticated control strategies.
Activates when ambient temperatures allow for cooling without compressor usage.
To exit and save all changes permanently, press the key or wait 15 seconds without pressing any buttons. Critical Parameter Reference Table Parameter Description Standard Default Recommended Range diF Controller Differential (Hysteresis) 1.0 °C to 4.0 °C HSE Maximum Setpoint Limit Dependent on application LSE Minimum Setpoint Limit Dependent on application Ont Compressor ON time during probe failure 10 to 30 min OFt Compressor OFF time during probe failure 10 to 30 min dty Defrost Type (0=Electrical, 1=Hot Gas, 2=Timed) Based on system design dit Interval between defrost cycles 4 to 8 hours dEt Maximum duration of a defrost cycle 20 to 45 min dSt Defrost termination temperature 4.0 °C to 15.0 °C Odd Output delay upon initial power-up 1 to 5 min (recommended) Troubleshooting Error Codes
: Parameters can be uploaded or downloaded using a pre-programmed "Copy Card" through the TTL serial port. Full Menu Access Before attempting to repack parameters, ensure the unit
Unlike modern controllers that can be programmed via USB or smartphone apps, the SB655 C often requires manual entry via the keypad.
For the full, detailed technical specifications and the complete manual, you can reference the official Eliwell SB655 product page or this detailed PDF document .
Cause: A digital input configured as an external safety device (like an oil pressure switch or thermal overload) has tripped.
The Eliwell SB655 C separates its settings into two levels: the User Menu (frequently accessed settings) and the Installer Menu (protected configuration parameters). Accessing the Protected Installer Menu Press and hold the key for more than 5 seconds.
Cut this out and tape it to the inside of the panel door.
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