Error LED flashes red / appliance not ready to operate

Possible cause: Insufficient battery voltage or poor connection causing the battery monitor to trip. Check battery charge status, ensure proper cable cross-sections, and clear loose connections or corrosion at battery terminals.

Appliance fails to run on 12V/24V DC

Possible cause: Blown fuse or reversed polarity. Check device fuse and replace with identical specification fuse if blown. Verify correct positive and negative polarity wiring.

Reduced cooling performance / ice build-up on evaporator

Possible cause: Heavy frost accumulation on evaporator due to humidity or blocked condenser airflow. Defrost the appliance completely, wipe dry, ensure adequate ventilation around the condenser, and keep the lid closed tightly.

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Dometic • Portable Compressor Cooler / Refrigerator

Dometic Waeco Coolmatic CF

Official technical documentation and workshop diagnostics for Waeco Coolmatic CF.

Technical Specifications

ElectricalOperating voltage: 12V / 24V DC and 100-240V AC (models CF-35 to CF-110 have integrated multi-voltage power supply; CF-18 and CF-25 require MOBITRONIC EPS-100W or MPS-35 rectifier for AC). Nominal current DC 12V: 3.1A (CF-18), 6.8A (CF-25), 6.0A (CF-35, CF-40), 7.0A (CF-50, CF-80, CF-110). Nominal current DC 24V: 1.9A (CF-18), 3.0A (CF-25 to CF-110). Nominal AC 100-240V: 1.3-0.7 A. Extension cord requirement (if used): UL/CSA-listed, minimum 15 A rating at 120 V.

Gas Or PressureCFC-free refrigerant circuit. Operating ambient temperature: -10 °C to +55 °C. Maximum continuous heel/inclination: 30 degrees. Battery monitor cut-out voltages (12V): Low 10.4V, Med 11.0V (or High 11.5V depending on model/setting); Cut-out voltages (24V): Low 21.6V / 22.1V, Med 23.3V, High 24.0V / 25.0V. Cut-in voltages (12V): Low 11.2V / 11.5V, Med 12.0V, High 12.5V / 12.9V; Cut-in voltages (24V): Low 23.0V / 23.6V, Med 24.5V, High 25.4V / 26.3V.

Capacities DimensionsCapacities: CF-18 (18 L), CF-25 (23 L), CF-35 (31 L), CF-40 (37 L), CF-50 (49 L), CF-80 (80 L), CF-110 (106 L). Weights: CF-18 (11 kg), CF-25 (14 kg), CF-15/CF-35 (15 kg), CF-40 (16 kg), CF-50 (18 kg), CF-80 (23 kg), CF-110 (25 kg). Temperature control range: +10 °C to -18 °C.

Master Troubleshooting & Diagnostics Matrix

Error Code / Indicator	Symptom / Meaning	Possible Cause	Step-by-Step DIY Fix	Suggested Actions
`N/A`	Error LED flashes red / appliance not ready to operate	Insufficient battery voltage or poor connection causing the battery monitor to trip	Check battery charge status, ensure proper cable cross-sections, and clear loose connections or corrosion at battery terminals.	DIY Safe
`N/A`	Appliance fails to run on 12V/24V DC	Blown fuse or reversed polarity	Check device fuse and replace with identical specification fuse if blown. Verify correct positive and negative polarity wiring.	DIY Safe
`N/A`	Reduced cooling performance / ice build-up on evaporator	Heavy frost accumulation on evaporator due to humidity or blocked condenser airflow	Defrost the appliance completely, wipe dry, ensure adequate ventilation around the condenser, and keep the lid closed tightly.	DIY Safe