Dometic RML 10.4G, RML 10.4P
Official technical documentation and workshop diagnostics for RML 10.4.
Technical Specifications
Master Troubleshooting & Diagnostics Matrix
| Error Code / Indicator | Symptom / Meaning | Step-by-Step DIY Fix | Suggested Actions |
|---|---|---|---|
N/A | The refrigerator does not work with AC operation Possible Cause: The fuse in the AC power supply is defective. | Replace the fuse. | DIY Safe |
N/A | The refrigerator does not work with AC operation Possible Cause: The vehicle is not connected to the AC power supply. | Connect the vehicle to the AC power supply. | DIY Safe |
N/A | The refrigerator does not work with AC operation Possible Cause: The AC heating element is defective. | Contact an authorized service agent. | Professional Intervention Required |
N/A | The refrigerator does not work with DC operation Possible Cause: The fuse in the DC cable is defective. | Contact an authorized service agent. The fuse on the relay must be replaced. | Professional Intervention Required |
N/A | The refrigerator does not work with DC operation Possible Cause: The vehicle fuse has blown. | Replace the vehicle fuse. (Refer to the operating manual of your vehicle.) | DIY Safe |
N/A | The refrigerator does not work with DC operation Possible Cause: The vehicle battery is discharged. | Test the battery and charge it. | DIY Safe |
N/A | The refrigerator does not work with DC operation Possible Cause: The ignition is not switched on. | Switch on the ignition. | DIY Safe |
N/A | The refrigerator does not work with DC operation Possible Cause: The DC heating element is defective. | Contact an authorized service agent. | Professional Intervention Required |
N/A | The refrigerator does not work with gas operation Possible Cause: The gas cylinder is empty. | Replace the gas cylinder. | DIY Safe |
N/A | The refrigerator does not work with gas operation Possible Cause: The gas valve is closed. | Turn the valve to open. | DIY Safe |
N/A | The refrigerator does not work with gas operation Possible Cause: Air is in the gas line. | Switch the refrigerator off and on again. Repeat the procedure three or four times if necessary. If available, switch on the stove and repeat the process with the refrigerator if necessary. | DIY Safe |
N/A | The refrigerator is being operated with gas although it is connected to the AC power supply in automatic mode Possible Cause: The mains voltage is too low. | No action required. The refrigerator automatically switches back to AC power supply as soon as the mains voltage is sufficient again. | DIY Safe |
N/A | The refrigerator is not adequately cooling Possible Cause: The ventilation around the cooling unit is not sufficient. | Check that the ventilation grille is not obstructed. | DIY Safe |
N/A | The refrigerator is not adequately cooling Possible Cause: The evaporator is iced up. | Check whether the refrigerator door closes properly. Ensure that the refrigerator seal fits correctly and is not damaged. Defrost the refrigerator. | DIY Safe |
N/A | The refrigerator is not adequately cooling Possible Cause: The temperature is set too high. | Set a lower temperature. | DIY Safe |
N/A | The refrigerator is not adequately cooling Possible Cause: The ambient temperature is too high. | Remove the ventilation grille for a while so that warm air can escape quicker. | DIY Safe |
N/A | The refrigerator is not adequately cooling Possible Cause: Too much food was placed in the refrigerator at once. | Remove some of the food. | DIY Safe |
N/A | The refrigerator is not adequately cooling Possible Cause: Too much warm food was placed in the refrigerator at once. | Remove the warm food and leave it to cool down before putting it in again. | DIY Safe |
N/A | The refrigerator is not adequately cooling Possible Cause: The refrigerator has not been operating for very long. | Check the temperature again after four or five hours. | DIY Safe |
N/A | Refrigerator door or frozen compartment door does not close Possible Cause: The door handle is blocked on the opened side. | Remove the door handle blockage. | DIY Safe |
N/A | Refrigerator door or frozen compartment door has completely detached from the device Possible Cause: The locking pins have been tampered with or are twisted. | Reinsert the door. | DIY Safe |
Warning | Defective temperature sensor in the refrigerator compartment Possible Cause: Sensor failure | Contact an authorized service agent. | Professional Intervention Required |
Warning | AC power not connected or AC voltage <= 190V Possible Cause: AC power supply issue | Connect the refrigerator to AC power or select a different energy type, e.g. gas or DC power. | DIY Safe |
Warning | DC power not connected Possible Cause: DC power supply issue | Connect the refrigerator to DC power or select a different energy type, e.g. gas or AC power. | DIY Safe |
Warning | DC overvoltage (>= 16V) Possible Cause: Excessive DC voltage supplied | Contact an authorized service agent. | Professional Intervention Required |
Warning | Tank stop mode active Possible Cause: Ignition switched off for refueling, gas operation blocked | Wait 15 min or switch to another operating mode. | DIY Safe |
Beep | The door is opened for more than 2 min Possible Cause: Door left open | Close the door. | DIY Safe |
Error | No connection between power module and display Possible Cause: Communication failure | Contact an authorized service agent. | Professional Intervention Required |
Error | No cooling capacity in gas mode Possible Cause: Cooling unit level or burner issue | Check if the device is at an angle and adjust it if necessary. Reset the error. Contact an authorized service agent if this error occurs again. | DIY Check / Tech Fallback |
Error | No cooling power in AC mode Possible Cause: AC cooling failure | Check if the device is at an angle and adjust it if necessary. Reset the error. Contact an authorized service agent if this error occurs again. | DIY Check / Tech Fallback |
Error | No cooling power in DC mode Possible Cause: DC cooling failure | Check if the device is at an angle and adjust it if necessary. Reset the error. Contact an authorized service agent if this error occurs again. | DIY Check / Tech Fallback |
Error | Gas valve test error Possible Cause: Gas valve failure | Reset the error. Contact an authorized service agent if this error occurs again. | DIY Check / Tech Fallback |
Error | Internal communication error Possible Cause: Internal module communication fault | Reset the error. Contact an authorized service agent if this error occurs again. | DIY Check / Tech Fallback |
Error | In stand-alone gas mode: The state of charge of the battery packs is too low Possible Cause: Depleted batteries in stand-alone packs | Insert new batteries and then reset the error. | DIY Safe |
Error | Gas lock after 3 ignition attempts Possible Cause: Ignition failure or empty gas cylinder | The gas cylinder is empty. Exchange the gas cylinder. Reset the error. | DIY Safe |
Error | Gas lock, internal error in the power module Possible Cause: Power module internal fault | Reset the error. Contact an authorized service agent if this error occurs again. | DIY Check / Tech Fallback |
Error | Ground contact, gas valve Possible Cause: Electrical grounding fault on gas valve | Reset the error. Contact an authorized service agent if this error occurs again. | DIY Check / Tech Fallback |
Error | Ground contact, ignition electrode Possible Cause: Electrical grounding fault on ignition electrode | Reset the error. Contact an authorized service agent if this error occurs again. | DIY Check / Tech Fallback |
Frequently Asked Questions
Q: What does climate class of SN (Sub Normal) mean?
The climate class SN (Sub Normal) defines the intended ambient temperature range for the absorption fridge's optimal operation.
Q: What’s the cooling performance in warmer ambient temperatures?
Cooling performance for absorption fridges is affected by warmer ambient temperatures. Ensure proper ventilation around the unit as detailed in the manual to maintain performance.
Q: How to operate an RMxxxx with a solar panel?
To operate an RMxxxx series absorption fridge with a solar panel, ensure the solar system provides adequate 12V DC power or sufficient battery storage to handle the power requirements, particularly when running on DC mode.
Q: My RMxxxx needs to be replaced. What would be an alternative?
When replacing an RMxxxx series refrigerator, look for current Dometic absorption or compressor models matching the physical dimensions and energy source requirements of your motorhome cutout.
Q: The refrigerator does not work In AC power mode?
Check if the vehicle is properly connected to the AC mains supply, verify that the AC fuse in the motorhome is intact, and ensure the refrigerator is switched on to AC mode on the control panel.
Q: The refrigerator does not work In DC power mode?
DC mode (12V) typically only works while the vehicle engine is running and the alternator is supplying power, preventing the vehicle starter battery from draining. Check the 12V DC fuses, vehicle ignition connection, and input voltage at the refrigerator terminals.
Q: The refrigerator does not work In GAS mode?
Ensure the gas cylinder valve is open, the main gas shut-off valves in the motorhome are open, and there is no air trapped in the gas line (try igniting another gas appliance first). Check if the igniter is sparking and that the burner is clean.
Q: In automatic mode: The refrigerator is being operated with gas although it is connected to The AC power supply?
In automatic energy selection mode, if the AC voltage is outside the acceptable tolerance range or unstable, the control system automatically switches to gas mode as a safety fallback. Check the AC supply voltage and connections.
Q: The refrigerator is not cooling adequately?
Verify that ventilation grilles are not blocked, check that the thermostat is set correctly, ensure the door seals tightly, do not overpack the interior restricting airflow, and verify that the selected energy source (AC, DC, or Gas) is actively functioning.
Q: WARNING type fault messages
WARNING type fault messages indicate a non-critical operational issue or prompt. Consult the user manual for the specific warning code displayed on the 10-series control panel to take corrective action.
Q: ERROR type fault messages
ERROR type fault messages indicate a critical system failure that stops the refrigerator from functioning safely on the current energy source. Check the specific error code on the display, troubleshoot the underlying power, gas, or ventilation issue, or contact customer service.