Cooler switches off automatically (battery monitor triggered)

Possible cause: Supply voltage has fallen below the cut-off threshold (11.3 V for 12V system or 24.6 V for 24V system) due to low battery charge. Recharge the vehicle battery. Avoid repeated starting or running high current consumers without extended charging phases.

Cooler fails to operate after vehicle cab is tilted

Possible cause: Unit was not switched off prior to tilting or oil has not settled back into the compressor circuit. Switch the cooler off before tilting the cab, and once the cab is lowered, leave it upright for 15 minutes or more before switching it back on.

Insufficient cooling performance

Possible cause: Inadequate ventilation around the compressor and condenser, or ventilation slots covered. Ensure sufficient clearance and ventilation space around the device. Do not cover ventilation slots and remove obstructions to allow air circulation.

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Dometic • Compressor Cooler / Refrigerator

Dometic CoolMatic CS-SC

Official technical documentation and workshop diagnostics for CoolMatic CS-SC.

Technical Specifications

ElectricalOperating voltage: 24 V DC (or 12 V DC with 12V lamp replacement), Average power consumption: 1.3 A, Cut-off voltage: 11.3 V (12V) / 24.6 V (24V), Restart voltage: 12.5 V (12V) / 26.0 V (24V)

Gas Or PressureRefrigerant: R134a, Total refrigerant quantity: 33 g

Capacities DimensionsNormal cooling capacity: 26 litres, Freezing capacity: 11 litres, Total capacity: 37 litres, Weight: approx. 15 kg, Continuous heel/tilt angle: max. 30 degrees, Ambient temperature range: -10 °C to 55 °C, Max air humidity: 90%

Master Troubleshooting & Diagnostics Matrix

Error Code / Indicator	Symptom / Meaning	Possible Cause	Step-by-Step DIY Fix	Suggested Actions
`N/A`	Cooler switches off automatically (battery monitor triggered)	Supply voltage has fallen below the cut-off threshold (11.3 V for 12V system or 24.6 V for 24V system) due to low battery charge	Recharge the vehicle battery. Avoid repeated starting or running high current consumers without extended charging phases.	DIY Safe
`N/A`	Cooler fails to operate after vehicle cab is tilted	Unit was not switched off prior to tilting or oil has not settled back into the compressor circuit	Switch the cooler off before tilting the cab, and once the cab is lowered, leave it upright for 15 minutes or more before switching it back on.	DIY Safe
`N/A`	Insufficient cooling performance	Inadequate ventilation around the compressor and condenser, or ventilation slots covered	Ensure sufficient clearance and ventilation space around the device. Do not cover ventilation slots and remove obstructions to allow air circulation.	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.