Dometic CoolMatic HDC
Official technical documentation and workshop diagnostics for CoolMatic HDC.
View official manual on manufacturer's site ↗Technical Specifications
ElectricalOperating Voltage: 12V DC or 24V DC. Average Power Consumption: 61 W. Current Consumption at 25°C/32°C: 3.3 Ah/h / 5.1 Ah/h. Cut-off Voltage: 10.4 V (12V) / 22.8 V (24V). Reconnection Voltage: 11.7 V (12V) / 24.2 V (24V). Minimum fuse rating: 15 A (at 12 V) or 7.5 A (at 24 V). Internal Light: LED bulb, E14, 12/24 V, 1.2 W.
Gas Or PressureRefrigerant circuit contains R134a.
Capacities DimensionsTotal Net Capacity: 277 l. Refrigerator Capacity: 202 l. Freezer Capacity: 75 l. Climate Class: ST (+16 °C to +38 °C). Max humidity: 90%. Constant heel/inclination limit: max 30°. Weight: approx. 52 kg. Dimensions: 540 mm (W) x 550 mm (D) x 1775 mm (H).
Master Troubleshooting & Diagnostics Matrix
| Error Code / Indicator | Symptom / Meaning | Possible Cause | Step-by-Step DIY Fix | Suggested Actions |
|---|---|---|---|---|
N/A | Compressor does not run (UKL = 0 V) | Interruption in connection cable between battery and electronics, defective main switch, or blown auxiliary inline fuse. | Establish connection, replace main switch, or replace inline fuse. | DIY Safe |
N/A | Compressor does not run with battery voltage too low (UKL <= UTIL) | Low battery voltage, loose cable connection, poor connection (corrosion), low battery capacity, or cable cross-section too small. | Charge battery, fix/clean connection, replace battery, or replace cable with correct cross-section according to manual charts. | DIY Safe |
N/A | Compressor does not run despite sufficient voltage (UKL >= UTIL) | The surroundings are too hot or poorly ventilated, the condenser is dirty, the fan is faulty, or there's an electrical break inside the compressor. | Relocate refrigerator, clean condenser, replace fan, or replace compressor. | DIY Check / Tech Fallback |
N/A | Compressor runs constantly (Inner temperature too cold on setting '1') | Thermostat sensor has no contact with the evaporator, or short circuit in thermostat line / defective thermostat. | Fasten sensor or replace thermostat. | DIY Check / Tech Fallback |
N/A | Cooling capacity reduced, inner temperature rises (Compressor runs long/constantly) | Frost building up on the evaporator, surroundings that are too hot or poorly ventilated, a dirty condenser, or a faulty fan. | Defrost evaporator, relocate refrigerator, clean condenser, or replace fan. | DIY Check / Tech Fallback |
N/A | Water inside or under the refrigerator | The water drain channel is blocked, food is stopping water reaching the collector, or the air deflector is holding too much water. | Clean drain using the provided cleaning tool, rearrange food items so they do not touch the back wall, and clean the air separator. | DIY Safe |
N/A | Unusual noises (Loud humming) | A component of the cooling circuit cannot swing freely (touching the wall) or foreign object jammed between cooling unit and wall. | Carefully bend component away or remove foreign object. | DIY Safe |
Frequently Asked Questions
Q: What can replace my old Dometic RM fridge?
Dometic's 2023 'New for old - simply swap' guide covers both its absorption and compressor fridges, showing which current models replace older ones. It's available from the catalogues section of Dometic's website.