Eliwell Sb655 C Manual Repack

This resource covers the key information and step-by-step guidance for repacking (replacing the packaging or reassembling the unit into its case) an Eliwell SB655-C controller. It assumes you have the SB655-C controller removed from its installation and that you are performing a careful reassembly/repack procedure (for shipping, storage, or reinstallation). If you need electrical or component-level repairs, follow manufacturer service procedures or a certified technician.

| Parameter | Old Value (Cooler) | New Value (Freezer) | Navigation notes from repack | | :--- | :--- | :--- | :--- | | LS (Minimum SP) | -5°C | -30°C | Found after parameter US | | SP (Setpoint) | 3°C | -18°C | Directly accessible via SET key | | dIt (Defrost interval) | 8 hours | 4 hours | Parameter group dF | | dL (Max defrost duration) | 20 min | 35 min | For heavy ice buildup | | FSt (Fan stop temp) | 4°C | -5°C | Prevents icing of evaporator |

The Eliwell SB655C features built-in pressure management, which allows it to directly monitor and control the refrigeration cycle without needing external pressure switches for basic protection.

Finding a direct "repack" manual for the Eliwell SB655 C can be tricky because these units are often integrated into specific commercial refrigeration systems (like those from Costan or Epta). The SB655 C is a programmable controller designed for compressor racks or complex cooling circuits.

Below is a comprehensive guide to understanding, installing, and programming the Eliwell SB655 C. 🛠️ Eliwell SB655 C Technical Overview

The SB655 C belongs to the Eliwell SmartVideo or SB series. These are high-end controllers used primarily in industrial refrigeration. They handle multiple stages of suction (compressors) and discharge (fans/condensers). Key Features Multi-Load Management: Controls up to 5 or 6 relay outputs.

Analog Inputs: Supports NTC, PTC, or 4-20mA pressure transducers.

Communication: Compatible with TelevisSystem and Modbus protocols.

User Interface: Typically features a 4-button layout with a dedicated LED display for status icons. 🔌 Installation and Wiring

Before powering the device, ensure the voltage matches the label (usually 100-240V~ or 24V~/=). Terminal Connections Power Supply: Connect to the designated L/N terminals. Probes (Pb1, Pb2):

Pb1: Usually the suction pressure transducer or temperature probe. Pb2: Usually the condensing pressure or temperature probe.

Digital Inputs: Used for high-pressure switches or emergency stops. Relay Outputs: Out 1–4: Compressor stages. Out 5–6: Condenser fans or alarm signals. ⌨️ User Interface & Navigation

The SB655 C uses a specific button logic to prevent accidental changes:

SET Button: Press once to view the Setpoint. Press and hold to enter the programming menu.

UP/DOWN Arrows: Used to scroll through parameters or increase/decrease values. ESC/Back: Used to exit a folder or cancel a change. How to Change the Setpoint Press and release the SET key. The current value will flash. Use UP or DOWN to change the value. Press SET again to confirm. ⚙️ Parameter Configuration (Level 1 & Level 2)

Parameters are divided into functional groups (folders). To access the "Deep" configuration (Level 2), you often need a password (default is usually 15 or 00). Common Parameter Folders:

CP (Compressors): Number of stages, rotation type (FIFO/LIFO), and minimum run times.

Fn (Fans): Condenser control settings and cut-in/cut-out differentials.

Pr (Probes): Calibration and probe type selection (e.g., converting bar to °C). AL (Alarms): High/Low pressure thresholds and delay times. Vital Parameters to Check: Description Default/Typical St1 Suction Setpoint Depends on gas type rE1 Suction Differential 1.0 - 2.0 bar St2 Condensing Setpoint 12.0 - 15.0 bar nCo Number of Compressors ⚠️ Troubleshooting Common Alarms If your display is flashing a code, refer to this list: E1: Suction probe failure (check wiring or sensor). E2: Condenser probe failure.

HA: High-pressure alarm (check condenser fans or cleanliness). LA: Low-pressure alarm (check refrigerant levels). dA: Digital input alarm (usually a tripped safety switch). 💾 Maintenance and "Repack" Tips

When we talk about a manual repack, it often refers to restoring the unit to factory defaults or cloning settings for a replacement unit.

Copy Card: Use the Eliwell "Unicard" or "CopyCard" to upload the configuration from a working SB655 C and download it to a new one. This saves hours of manual entry.

Hard Reset: To reset to factory defaults, look for the rSt parameter in the hidden menu, or hold the SET and DOWN buttons during power-up (check specific firmware version for compatibility). To help you get the exact data you need, could you tell me: What specific error code or behavior are you seeing?

Are you trying to program a new unit from scratch or fix an existing one?

What is the refrigerant gas type (e.g., R404a, R134a, CO2) being used?

I can provide the specific pressure-to-temperature conversion tables for your setup.

The Eliwell SB655 C Manual Repack is not an official document from Eliwell (now part of Schneider Electric), but rather a user-created compilation. For technicians and maintenance staff, it’s often more useful than the original—provided you understand its limitations.

Before we wire, let’s identify the unit. The Eliwell SB655C is a digital pressure switch and temperature controller. Unlike old mechanical pressure switches (which drift over time), this is an electronic control specifically designed for refrigeration racks, HVAC chillers, and air compressors.

Key takeaway: You are replacing a mechanical switch with a smart computer. Treat it gently—no dropping on concrete.

To enter programming mode: Press Set + Down Arrow for 3 seconds. (Password is usually 0 or 22).

The manual lists 100+ parameters. You only need these 8 to get running:

| Parameter | Name | Typical Setting (R404A Freezer) | Why it matters | | :--- | :--- | :--- | :--- | | SP | Set Point | -10°F / -23°C | The target temperature when running. | | r0 | Cut-in (Diff) | 36 PSI (or 5°F) | Mechanical switch logic: SP + r0 = Cut-in pressure. | | r1 | Cut-out (Safety) | 0 PSI | The low-pressure safety lockout. | | OdO | Output delay | 3 minutes | Protects compressor from short cycling. | | Ot | Probe type | P30 (for NTC) / Pr1 (4-20mA) | Most common error: Wrong setting here = "- - -" on screen. | | rtr | Relay type | CL (Cooling) | Changes from heating mode to cooling mode. | | ALu | Low pressure alarm | 10 PSI | Alerts before the safety trips. | | P2P | Probe 2 function | DEF (Defrost) | Tells the unit to use temp probe to end defrost. |

Critical fix for "Short Cycling": If the compressor turns on for 5 seconds and shuts off, increase OdO (Output delay) to 5 minutes. Do not lower it.