Eliwell Sb655 C Manual Link

The Eliwell Energy SB655/C is a universal electronic controller designed for air-conditioning and refrigeration systems with up to 2 circuits and 4 compressors. Key Technical Specifications Power Supply : 12–24V AC or 24V DC. Physical Interface

: 4-digit LED display with 18 icons and 4 tactile buttons for navigation. I/O Capacity Analogue Inputs

: 5 total (typically 3xNTC and 2 configurable for I/V like 4–20 mA or 0–10 V). Digital Inputs : 6 configurable inputs. Relay Outputs : 6 high-voltage digital outputs. Analogue Outputs : 2 PWM, 2 Voltage (0–10V), and 1 Current (4–20mA). Communication : Includes a TTL serial port for parameter cloning and supports protocols. Core Functions & Management Compressor Control eliwell sb655 c manual

: Manages Scroll, Semi-Hermetic, or Screw compressors with up to 4 power steps, featuring balanced operating hours. System Versatility

: Features automatic summer-winter changeover and heat pump deactivation at very low temperatures. Energy Efficiency The Eliwell Energy SB655/C is a universal electronic

: Includes modulating water pump control, dynamic defrost, and analogue condensation control. Advanced Features : Supports Free Cooling/Heating and power limitation to adapt to system demand. Electric Automation Network Basic Navigation & Programming

The menu is organized into folders accessible through various security levels (User, Service, Constructor). modicontrols.pl F0 (Fan Control Mode): Determines if fans run

3. Fan Parameters (F0 – F9)

F0 (Fan Control Mode): Determines if fans run continuously or cycle with the compressor.
F1 (Fan Delay): Delays the fan start after a defrost to prevent blowing warm air into the cabinet.

Overview of the Eliwell SB655C

The SB655C is part of Eliwell’s "Speedy" series. It is designed to drive a hermetic or semi-hermetic compressor (relay output) and manage defrost cycles (hot gas or electric). It typically features:

Inputs: One probe input (NTC or PTC) for the thermostat, with optional inputs for auxiliary functions.
Outputs: Relay outputs for the compressor, defrost, and fan.
Display: A 3-digit LED display showing temperature or alarm codes.

6.2 Common Issues & Fixes

| Symptom | Possible Cause | Solution | |---------|----------------|----------| | Compressor does not start | Anti-short cycle (AC) active | Wait. Reduce AC if needed. | | | Setpoint > room temp | Lower setpoint. | | | Probe defective | Replace probe. | | Continuous defrost | dE set too high, or dS too low | Reduce dE, increase dS. | | Display shows OFF | Unit in standby | Press ON/OFF for 3s. | | Erratic temperature | Wrong probe type (P2) | Set P2 to match probe. |

5.6 Digital Input (Terminals 5-6)

| Code | Description | Options | Default | |------|-------------|---------|---------| | i1 | Digital input function | 0=Disabled, 1=Door switch, 2=Ext alarm | 1 | | i2 | Door open action | 0=Comp off, 1=Comp off + alarm | 0 | | id | Door alarm delay | 0 – 255 | 10 | min |

How to Access the Programming Map

If you need to change the defrost interval or differential, you cannot do it from the simple Setpoint view. You must enter Programming Mode:

Press and hold the SET button for approximately 5–7 seconds.
The display will typically show a parameter code (e.g., r0).
Use the UP and DOWN arrows to scroll through parameters (r0, r1, r2... d0, d1...).
Press SET to select a parameter.
Use UP/DOWN to change the value.
Press SET to save.
Wait 10 seconds or press the combination to exit.

Part 1: Understanding the Eliwell SB655 C

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.

3. Strengths ✅

Compact & complete: All parameters listed with min/max/default values and units.
Logical parameter grouping: Pr (probe), rEg (regulation), Cnt (control), dEF (defrost), AL (alarms).
Clear terminal labeling: 1–12 with function descriptions.
Error code table: Essential for diagnostics.