Eliwell Sb655 C Manual Best |work| Page

Since the SB 655 C is a legacy model (discontinued by Eliwell), follow these steps:

Features balanced operating hours for compressors, automatic summer-winter changeover, and a "Free Cooling/Free Heating" function. Connectivity: Fully supports Modbus RTU

| Error Code | Meaning | Best Fix (From the Manual) | | :--- | :--- | :--- | | | Internal memory failure | Controller is fried. Replace it. No manual can fix hardware. | | P1 | Room probe faulty or shorted | Check probe wires at pins 4 & 5. Replace NTC probe. | | P2 | Evaporator probe faulty | Check probe wires at pins 7 & 8. Parameter P2P likely set to y (yes). | | HA | High Temperature Alarm | Door left open? Condenser dirty? Check ALu parameter. | | LA | Low Temperature Alarm | Too much cold air. Check ALL parameter. | | dA | Defrost Alarm | Defrost took longer than tdF . Evaporator iced up? | | EA | External alarm | A digital input (door switch) is triggered. |

While this guide covers the basics, for advanced mapping (changing relay logic, downloading via copying key, or alarm mapping), the full PDF is necessary.

Clear terminal block layouts for power supply (12/24V AC/DC or 230V AC), compressor relay, defrost relay, evaporator fan control, and probe inputs (NTC or PTC). eliwell sb655 c manual best

The best manual will also tell you how to (if equipped) without clearing the alarm—typically pressing the SET key once.

Reserved strictly for OEMs to specify unit limits, sensor curves, and multi-stage compressor timing profiles. Network & Communications Setup

: 5 independent SPST mechanical relay outputs dedicated to compressor steps, fans, or water circulation pumps.

Ensure the controller is set up to balance operating hours, which reduces stress on individual compressors and reduces maintenance costs. Since the SB 655 C is a legacy

You can find full technical documentation and wiring diagrams through these sources:

Sets the maximum safety duration for a defrost cycle if the evaporator probe fails to terminate it early.

2x universal ports supporting NTC, 4–20mA, 0–1V, 0–5V, or 0–10V 6x Safety Extra-Low Voltage (SELV) inputs Digital Outputs 5x electromechanical relays + 2x PWM channels Analogue Outputs 3x SELV ports for variable speed control Parameter Mapping for Digital Outputs

The Eliwell SB655C is a microprocessor-based controller that offers precise temperature control for refrigeration systems. Its advanced features and user-friendly interface make it an ideal solution for commercial refrigeration applications, including supermarkets, restaurants, and food storage facilities. This manual provides a comprehensive overview of the Eliwell SB655C, covering its technical specifications, installation, operation, and troubleshooting. No manual can fix hardware

Electronic controllers for centralised air-conditioning units

If the screen shows "OFF," you may need to enter the parameters (Folder Ui23 ) and change the value from 0 to 1 to enable button activation.

Use the or DOWN arrow keys to increase or decrease the value. Press the SET key again to save the changes and exit. Accessing the Configuration Menu (Factory Parameters) To change advanced engineering parameters: