Roller Grill (a French brand) produces a unique countertop chocolate display fridge (e.g., model CDC 800/1200, Nisbets code DH787/DH788) designed to hold chocolates at ~15–17 °C with ~50% humidity. These are often seen in cafes for pralines and truffles. They come preset from the factory and are generally plug-and-play. Common issues for Roller Grill chocolate fridges include temperature fluctuations if ambient conditions are poor, or condensation if used incorrectly.
Typical Faults & Diagnosis: First, note that these units are pre-set with fixed temperature and humidity for chocolate preservation. There isn’t much user adjustment, so if the temperature is off, likely something is wrong. If the fridge is too warm (above 17 °C inside), check the basics: Is the unit located away from ovens, radiators, or direct sun? High ambient heat can push it beyond its capacity. The Roller Grill chocolate fridge is specified for certain ambient conditions – typically maximum 25 °C and 60% RH environment. If you exceed this, the unit may struggle. Ensure the rear vents are not blocked; even though it’s a compact unit, it needs some clearance behind to expel heat. Also verify the door (glass) is closing fully; these models have either sliding or hinged glass panels – an incomplete seal will cause warm air ingress.
Because the temperature and humidity are regulated, if you see condensation forming inside, it might indicate the ambient humidity is too high or the door was opened too frequently. The humidity control might not keep up if warm moist air enters often. Reducing door openings and keeping ambient RH down will help. There’s usually a water tray or wick for humidity control – ensure it’s filled or configured as per the manual if required (some models have a built-in humidifier set at 50%).
Roller Grill units have a digital display for temperature, but they may not explicitly show error codes to the user. If the unit fails to cool at all, check if the internal light and fans come on – if not, it could be a power issue (fuse or internal wiring). If the lights are on but the compressor is silent, the thermostat or controller might be faulty or the unit could be stuck in defrost (though on these chocolate fridges, defrost is usually just off-cycle since they run above dewpoint). No cooling with lights on warrants a service call to check the controller or refrigerant circuit.
Sometimes, a general error code like E1 or E2 can appear if the controller detects a sensor fault (for instance, if a temperature probe connector vibrated loose during transit). In similar countertop fridges with digital controls, E1 often means cabinet sensor issue, and E2 a defrost sensor issue. While specific Roller Grill documentation isn’t public, these codes are standard on many units – the fix would be to reconnect or replace the sensor. However, given the simplicity of Roller Grill’s chocolate fridge (factory preset, minimal adjustments), it’s uncommon for users to see an error unless a component failed. In case of any unresolved fault, contacting Roller Grill’s UK distributor or an authorized service agent is recommended.
Fault Code Table – Roller Grill (Generic):
| Code | Meaning | Solution |
|---|---|---|
| E1 | Cabinet sensor fault | Indicates the interior temperature sensor faulted. Action: Requires sensor check/replacement by a technician. |
| E2 | Evap sensor fault | Indicates the coil sensor (if present) failed. Action: Technician to replace sensor; unit may still run but defrost timing might be affected. |
| E (any) | Any “E” code on display | Any error code means the unit’s self-diagnosis spotted an issue. Action: Power-cycle the fridge (turn off for 10 minutes, then on). If error persists, call for service. |
| (no display) | Unit off | If there’s no temperature display and no cooling, verify power. These units should always display the temperature when powered. Action: Check plug and switch. |
Note: Roller Grill’s manual defrost: It’s a static cooling unit (no auto-defrost heater). If used in a cold environment or left off, you might rarely see frost – simply turn it off to defrost. Always keep the panoramic glass clean to entice customers, but avoid abrasives. For any electrical fault (fan not running, etc.), because of the unit’s compactness, a professional should service it.