Eliwell Sb655 C Manual ((link)) | ULTIMATE · 2027 |

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The Eliwell SB655/C (often part of the Energy Flex series) is a universal parametric controller designed for centralized air-conditioning units, chillers, and heat pumps. Its manual provides critical guidance on managing up to two refrigeration circuits and balancing up to four compressor power steps.  Core Capabilities & Technical Profile 

According to the SB655 technical data sheet, the controller is engineered for complex HVAC/R environments: 

Compressor Management: Supports Scroll, Semi-Hermetic, and Screw compressors with balanced operating hours. Eliwell SB655/C is a specialized universal controller from

Multi-Input Flexibility: Features 5 sensor inputs compatible with NTC, 4–20 mA, and 0–10 V signals.

Output Configuration: Includes 6 relay outputs and supports variable frequency drives (VFD) for both compressors and water pumps.

Climate Intelligence: Includes automatic summer-winter changeover and "Free Cooling/Heating" logic to optimize energy based on outdoor conditions.  User Interface & Navigation 

The Energy Flex manual highlights a 4-digit display with 18 icons. Access is divided into three security-coded levels:  End User: Basic monitoring and setpoint adjustments. Service: Maintenance settings and alarm history viewing.

Constructor: Deep configuration of digital and analogue outputs.  Programming & Monitoring 

Copy Card: A physical "Copy Card" can be used to upload or download parameter maps between devices without manual entry.

Communication Protocols: The SB655/C natively supports Modbus RTU and Televis, allowing for remote monitoring and integration into building management systems.

Alarms: Common codes such as E1 (cell probe error) or E2 (defrost probe error) indicate shorted or interrupted sensors. 

For full configuration tables and wiring diagrams, you can refer to the official Eliwell documentation or technical manuals provided by specialized retailers like Electric Automation Network. 

Electronic controllers for centralised air-conditioning units

Eliwell SB655/C (Energy Flex SB 655/C) is a universal electronic controller designed for air-conditioning and refrigeration units, specifically centralized systems with up to two circuits and four compressor steps. It belongs to the Energy Flex

range, which is often used in chillers, heat pumps, and condensing units. Electric Automation Network Key Technical Specifications is a modular unit typically designed for DIN rail mounting Eliwell by Schneider Electric

: Controls up to 2 circuits and manages up to 4 power steps. Inputs/Outputs 5-6 Sensors : Supports NTC, 4–20 mA, 0–1V, 0–5V, or 0–10V. 6 Digital Inputs 6 Relay Outputs Power Supply : Usually 12–24V AC/DC. Connectivity : Fully compatible with protocols for remote monitoring and integration. Frigo Soğutma Primary Functions & Features Compressor Management

: Handles scroll, semi-hermetic, and screw compressors. It includes "intelligent management" to balance operating hours between units of different power levels. Seasonality

: Features automatic summer-winter changeover based on outdoor conditions. Advanced Control

: Supports Free Cooling/Heating, power limitation to avoid overloads, and adaptive functions for chillers without storage tanks. Troubleshooting Common Alarm Codes The SB655C features an

: Maintains an alarm history to facilitate troubleshooting and maintenance. Electric Automation Network Navigation and Menu Access

The interface features a 4-digit display and 4 configurable buttons for navigation.

Electronic controllers for centralised air-conditioning units

Here’s an informative review of the Eliwell SB655 C Manual, focusing on its usefulness, content, and practical value for users of the Eliwell SB655 C temperature controller.

Troubleshooting Common Alarm Codes

The SB655C features an alarm system to protect the product. The manual provides a detailed list of codes, but here are the most common ones:

• P1 / E1: Probe Failure. The temperature sensor is disconnected, shorted, or broken. Solution: Check wiring or replace the probe.
• HA: High Alarm. The temperature is rising above the safe threshold. Solution: Check if the compressor is running or if the door was left open.
• LA: Low Alarm. The temperature is dropping below the safe threshold. Solution: Check setpoint and probe location.

To silence an alarm, press any button (depending on configuration).

Maintenance Checklist (quarterly)

• Inspect probe for corrosion/damage.
• Verify setpoint and alarms.
• Test defrost cycle and heater function.
• Check relay outputs for wear or pitting.
• Confirm keypad lock and password if used.

7. Factory Reset (Restore Default Parameters)

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

1. Enter the parameter menu (hold SET, enter password 3).
2. Navigate to parameter Ptb (not always present on SB655 C – check manual revision).
3. Alternatively, find and set parameter rSt to YES (some versions).
4. If no reset parameter exists, manually set:
   • SP = 0.0°C
   • Hy = 2.0
   • LS = -50
   • US = +50
   • dLy = 5
   • OdO = 0
   • C_F = C

If the unit remains locked, power cycle the controller (disconnect power for 30 seconds).

Introduction

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.

Checking the Setpoint

If you want to know what temperature the unit is currently set to maintain:

1. Press the SET button once.
2. The display will flash the target temperature (Setpoint).
3. After a few seconds, it will revert to showing the actual cabinet temperature.

4.1 Display & Keys

| Key | Function (Short press) | Function (Long press, 3s) | |-----|------------------------|----------------------------| | SET | View/Modify setpoint | Enter parameter menu | | DEF | Manual defrost | --- | | UP | Increase value / browse | --- | | DOWN | Decrease value / browse | --- | | ON/OFF | Standby (display off) | --- |

LED Indicators:

• Compressor: ON when compressor relay active
• Defrost: ON during defrost cycle
• Alarm: Flashing for active alarm

4.3 Navigating Parameters

• Use UP/DOWN to scroll through parameters (e.g., SP, Hy, LS, US, OdO, dLy, etc.).
• Press SET to view the value of a parameter.
• Use UP/DOWN to change the value.
• Press SET to store the new value.
• Press SET + UP simultaneously (or hold SET for 3 seconds) to exit the menu.

3. Electrical Connections: Decoding the Terminals (The Critical Part)

Without the Eliwell SB655 C manual, wiring is the most common source of failure. The terminal block is located on the back of the unit. Here is the standard terminal assignment for a 230V model:

| Terminal | Label | Function | Typical Connection | | :--- | :--- | :--- | :--- | | 1 | 12V | +12 Vdc output for probe (power supply) | Connect to probe + | | 2 | GND | Ground reference for probe | Connect to probe - | | 3 | PTC/NTC | Analog input for temperature probe (Probe 1) | Signal wire (typically white or yellow) | | 4 | N | Neutral (Power supply input) | 230V Neutral Line | | 5 | L | Live (Power supply input) | 230V Live Line | | 6 | NO | Normally Open output relay contact | Compressor contactor coil (L1) | | 7 | COM | Common output relay contact | Compressor contactor common | | 8 | NC | Normally Closed (rarely used) | Alarm circuit or unused |

Important Wiring Notes from the Manual:

• Use copper conductors only.
• Keep probe wires away from power cables (minimum 50mm separation) to prevent electrical noise.
• The relay on terminals 6-7 supports up to 8A resistive. For inductive loads (compressors), use an external contactor.
• The probe (NTC or PTC) connects between terminals 1 (+12V), 2 (GND), and 3 (signal). A typical NTC probe uses two wires: one to 2, one to 3. Some three-wire probes use 1, 2, 3.