Eliwell Sb655 C Manual =link= File

utilizes a series of parameters to define its behavior. These are organized within a structured menu system. Key Parameters Breakdown

Determines the temperature threshold for alarm triggering. Using the Multi-Function Key (MFK)

| Parameter | Description | Typical Refrigerator (0-5°C) | Typical Freezer (-18°C) | | :--- | :--- | :--- | :--- | | | Compressor differential (hysteresis). The compressor stops at SP and restarts at SP + c1. | 2.0°C | 3.0°C | | c2 | Compressor protection delay (anti-short cycle). Minimum time between stops and restarts. | 3 minutes | 4 minutes | | c3 | Probe display offset. Calibrates if the reading is wrong. | 0.0 | 0.0 | | c4 | Defrost interval (in hours). | 6 hours | 8 hours | | c5 | Defrost duration (in minutes). | 20 minutes | 30 minutes | | c6 | Defrost type: 0 = Electrical (Heater), 1 = Hot gas/Off-cycle. | 1 (Off-cycle) | 0 (Electrical) | | c7 | Drip time after defrost (minutes). | 2 min | 5 min | | AL1 | Low temperature alarm threshold (relative to setpoint). | -2.0°C | -22.0°C | | AL2 | High temperature alarm threshold (relative to setpoint). | +4.0°C | +10.0°C | | ALd | Alarm delay (minutes before sounding). | 60 min | 60 min | | F3 | Temperature unit: 0 = °C, 1 = °F. | 0 | 0 |

1 or 2 configurable voltage-free digital inputs (e.g., door switch, high-pressure alarm). Output Relays: Compressor: 8A, 15A, or 20A (model dependent). Defrost: 8A. Evaporator Fans: 8A. Auxiliary/Alarm: 8A. 2. Installation and Wiring Guidelines eliwell sb655 c manual

| Symptom | Possible Cause(s) | Suggested Solution(s) | | :--- | :--- | :--- | | | No power, faulty transformer, internal fuse blown. | Verify power supply (12-24Vac) at the controller terminals. Check cabling and transformer. | | Compressor Not Starting | Setpoint reached, minimum OFF time active, safety lockout (pressure switch), faulty probe, wiring issue. | Check status LED. Verify Setpoint. Test high/low pressure switches. Inspect probe readings. | | Constant Defrosting / Never Defrosts | Defrost probe failed or disconnected, incorrect defrost interval ( EdF ), probe incorrectly positioned. | Check evaporator probe reading. Ensure it is mounted securely. Adjust EdF setting. | | Alarm Code Displayed | (Refer to controller's display for specific code) e.g., "E01" (probe 1 failure), "HA" (High Temperature Alarm). | Check all probe connections and resistance values. Look up the specific code in the official manual. | | Parameter Can't Be Changed | The parameter is read-only, a password is required ( LOC=y ), controller is locked by higher-level access. | Verify correct menu level. Enter correct password for User, Service, or Manufacturer level. |

Air probe (Probe 1) failure. The sensor may be disconnected or short-circuited.

Fix: Check system pressures and motor temperatures. Trace the mechanical safety switch resetting mechanism. 7. Factory Reset and Copy Card Programming utilizes a series of parameters to define its behavior

What are you running (e.g., a low-temperature freezer, medium-temp display case, or Chiller/HVAC unit)? Which probe types are you using (NTC, PTC, or PT1000)?

Heavy-duty relay for compressor contactors.

When an error occurs, the display flashes an alarm code and activates any configured alarm relays. Diagnostic Matrix Error Code Corrective Action Room Probe (Pb1) Error Faulty sensor, open circuit, or short circuit Using the Multi-Function Key (MFK) | Parameter |

Lower values mean tighter control but cause shorter compressor cycles. Maximum Setpoint Limit LSE to 150°C

Proper installation and wiring are critical for reliable operation. The following wiring map for the main SB655 base highlights key connections, but always cross-reference with the controller's specific diagram, as accessory connections may vary.

Efficient defrosting prevents ice build-up, which isolates the evaporator coils and degrades cooling capacity.

Check current temperature on display and verify the limit set in parameter LA1 . External Alarm