Key Features & Specs: The Williams Diamond LD1GS is a 520 litre upright single-door freezer featuring a full-length glass door and interior illumination for product display It uses Williams’ Coolsmart digital controller for precise temperature control and is rated for heavy-duty use in up to 38 °C ambient kitchens. The cabinet is built with stainless steel inside and out, high-density 75 mm insulation, and an energy-efficient fan-forced cooling system for even temperatures. Temperature range is –18°C to –22°C, suitable for ice creams and deep-frozen goods. The unit runs on R404A refrigerant in older models (newer Williams units use R448A or R290 alternatives). Dimensions are 2040 mm tall × 740 mm wide, so it provides a small footprint with big storage.
Strengths: Williams freezers are known for robust build and reliability. The Diamond LD1GS has a self-closing double-glazed door that minimizes temperature loss, and the frame is heated to prevent condensation (so the glass stays clear). It maintains temperature well even with frequent door openings – important in UK shops where customers browse the freezer. Its Coolsmart controller provides alarms for high/low temperature and probe faults, helping staff catch issues early. Energy efficiency is decent for a glass door (estimated Class D/E). Technicians praise Williams units for their serviceability – e.g. easy access to components and availability of spare parts. Williams is a British brand, so parts and support are readily available in the UK.
Common Issues/Weaknesses: Williams freezers are high-end, and their parts (controllers, probes) can be pricey to replace. A known issue is occasional probe failures – e.g. an E2 error indicating an evaporator sensor fault. This triggers the unit to cycle the compressor on/off to maintain safe temps. The fix often involves replacing the faulty probe (see Williams Fault Codes in the next section). Another complaint is that older Williams models using R404A have higher global warming potential refrigerant – many operators are now retrofitting to lower-GWP gas or upgrading to Williams’ newer hydrocarbon models. Otherwise, few performance issues are reported; just remember to clean the condenser regularly and check door seals (a worn seal can cause E01 high temp alarms due to warm air ingress. Overall, the Williams LD1GS is a premium, reliable display freezer, with most problems being minor and fixable by routine maintenance or sensor replacement.
Williams Freezer Error Codes (CoolSmart Controller)
| Code | Meaning | Probable Cause | Recommended Fix/Reset | When to Call a Technician |
|---|---|---|---|---|
| E01 | High Temperature Alert | Cabinet temp above safe range | Check door seal integrity and ventilation Ensure door fully closed and no stock blocking it. After correcting, the alarm will clear when temp drops. | If temp stays high (E01 persists) after fixes – could be refrigerant or compressor issue (needs professional service). |
| E02 | Low Temperature Alert | Cabinet temp below set range | Usually a controller or probe issue Power cycle the unit (off 2 mins, on) to reset control. Verify controller setpoint. | If E02 returns or unit is over-freezing continuously – call technician; sensor or controller likely faulty. |
| E03 | Cabinet Sensor Error | Main cabinet temperature sensor failure | Display may show “– –” Unit runs emergency cycle. Fix: locate and replace cabinet probe (requires spare part). You can attempt a reset, but likely the probe is bad. | Call a Williams-authorized engineer to replace the temperature probe and reset the controller. |
| E04 | Evaporator Sensor Failure | Evaporator probe malfunction | Defrost control is affected Fix: Check evaporator coil for icing. After manual defrost, restart unit. Probe likely needs replacing. | If error continues after defrost/reset – technician should replace evaporator sensor (to restore proper defrost regulation). |
| E14 | Fan Motor Error | Evap or condenser fan failure detected | Inspect fans – are they spinning and unobstructed? Clean blades. Fix: If a fan is not running, it likely needs replacement. | Call a tech to replace faulty fan motor (especially evaporator fan, as unit won’t cool properly until fixed). |
| E15 | Defrost Error | Defrost cycle took too long or failed | Possible heavy ice build-up or heater fault. Fix: Manually initiate defrost or unload freezer and do a full manual defrost. Check that door was closing properly. | If error reoccurs next cycle – call service; defrost heater or probe may be bad. Continuing operation without proper defrost can damage compressor. |
| E16/E17 | High/Low System Pressure | E16: High discharge pressure; E17: Low suction pressure | E16: likely dirty condenser or ventilation blocked. E17: possible refrigerant leak or expansion valve issue | E16 fix: clean condenser coil, ensure ambient <43°C. E17 fix: check if evaporator iced (defrost) or if system undercharged (tech required). |
Troubleshooting Tip: For any E-series error on Williams that isn’t resolved by basic checks (power, cleanliness, door seal), it’s wise to contact an authorized Williams service provider. The controller will keep a history of alarms, which a tech can interpret. Always document the error code and conditions (e.g., “E02 appeared after overnight freeze of new stock”) to help the engineer pinpoint the issue