Electronic controllers for centralised air-conditioning units
: Capable of managing Scroll, Semi-Hermetic, or Screw compressors with up to 4 power steps.
He referenced the manual for the recommended probe wiring checks and the correct parameter values to reduce nuisance cycling: increase the probe filter setting, enable a 30-second alarm delay, and set a small positive offset to the probe type to account for the sensor’s slight aging. More importantly, the manual’s troubleshooting chart advised verifying the anti-short-cycling timer: the SB655 C’s default was 3 minutes, and if the compressor was restarting more frequently due to spurious inputs it would never stabilize. eliwell sb655 c manual
| Code | Parameter Name | Description | Typical Range | Recommended Setting | | :--- | :--- | :--- | :--- | :--- | | | Setpoint | Desired controlled temperature | LS to US | 2.0°C (cooler) / -18.0°C (freezer) | | Hy | Hysteresis | Differential (cut-in – cut-out). Compressor starts at SP+Hy, stops at SP. | 0.1 to 25.0°C | 2.0°C (reduces cycling) | | LS | Minimum Setpoint | Lower limit to lock SP | -50 to US | -30°C (freezer) / 0°C (cooler) | | US | Maximum Setpoint | Upper limit to lock SP | LS to 150°C | 8.0°C (cooler) / 0°C (freezer) | | OdO | On Delay Output | Delay before energizing output after power-up | 0 to 250 min | 2 min (protects compressor) | | dLy | Delay | Minimum off time for compressor | 0 to 60 min | 5 min (crucial for compressor life) | | PA | Password | Access code for parameter menu | 0 to 199 | 3 (default) | | C_F | Temperature Scale | Celsius or Fahrenheit | C / F | C (or F for USA) | | S1P | Probe 1 Type | Type of temperature probe | PtC / ntC | ntC (usually for NTC 10k) or PtC |
Press the Power Button to return to normal operation. 2. Common Alarm & Error Codes | Code | Parameter Name | Description |
: This is the most direct technical guide covering digital/analogue output configurations, parameter downloading via programmed keys, and internal byte maps.
The is a base electronic controller typically used in centralized air-conditioning units. This guide provides a summary of essential operations, programming steps, and common alarm codes based on official documentation from Eliwell . 1. Programming & Navigation parameter downloading via programmed keys
The manual includes: