Question 1

The battery charger isn't working, and its power LED won't light up (battery poles dirty or corroded).

Accepted Answer

Possible cause: The battery terminals are dirty or corroded.. Disconnect the charger from the power supply, unclip the battery clamps, and clean the battery poles.

Question 2

The battery charger isn't working, its power LED won't light up (cable insulation fault).

Accepted Answer

Possible cause: The live cables have damaged insulation, breaks or loose connections.. Inspect the live cables for damaged insulation, breaks or loose connections.

Question 3

The battery charger isn't working, its power LED won't light up (short circuit).

Accepted Answer

Possible cause: Short circuit has been generated, triggering the device fuse.. Once excess current has tripped the device fuse, it must be replaced by an authorised service agent.

Question 4

The battery charger isn't working, its power LED won't light up (undervoltage/sulfation found during check).

Accepted Answer

Possible cause: The preliminary check found undervoltage or sulfation, and the charger's switched to rescue mode.. If the battery can be recovered, charging starts on its own. If not, it's dead and needs replacing.

Question 5

The battery charger isn't working, its rescue-mode LED is lit (LiFePO4 undervoltage protection).

Accepted Answer

Possible cause: For LiFePO4 batteries only - undervoltage protection has kicked in because voltage's too low.. Hold the mode button for at least 5 seconds to reset, then wait 30 seconds. If voltage doesn't reach the constant-current threshold, the battery's dead and needs replacing.

Question 6

The battery charger isn't working, its error LED is lit (loose or wrong clamps).

Accepted Answer

Possible cause: The battery clamps are loose, wrongly connected, or not connected at all.. Disconnect the charger from the power supply, make sure the clamps are firmly and correctly attached, reconnect, then keep the button pressed for 5 seconds or more to reset.

Question 7

The battery charger isn't working, its error LED is lit (wrong charging program).

Accepted Answer

Possible cause: The charging program isn't set correctly for the battery in use.. Check the charging program's setting, and press the mode button to select the right one for the battery in use.

Question 8

The battery charger isn't working, its error LED is lit (overvoltage protection).

Accepted Answer

Possible cause: Overvoltage protection has kicked in - the battery voltage's too high.. Reduce the connected voltages, then hold the mode button for at least 5 seconds to reset.

Question 9

The battery won't take a charge, or can't hold one.

Accepted Answer

Possible cause: The battery is exhausted or significantly sulfated.. Replace the battery.

Question 10

Charging's taking unusually long, and the battery's not fully charging.

Accepted Answer

Possible cause: The charging program isn't set correctly for the battery in use.. Check the charging program's setting, and press the mode button to select the right one for the battery in use.

Dometic SCS

Technical Specifications

Master Troubleshooting & Diagnostics Matrix

Error Code / Indicator	Symptom / Meaning	Possible Cause	Step-by-Step DIY Fix	Suggested Actions
`N/A`	The battery charger isn't working, and its power LED won't light up (battery poles dirty or corroded).	The battery terminals are dirty or corroded.	Disconnect the charger from the power supply, unclip the battery clamps, and clean the battery poles.	DIY Safe
`N/A`	The battery charger isn't working, its power LED won't light up (cable insulation fault).	The live cables have damaged insulation, breaks or loose connections.	Inspect the live cables for damaged insulation, breaks or loose connections.	DIY Safe
`N/A`	The battery charger isn't working, its power LED won't light up (short circuit).	Short circuit has been generated, triggering the device fuse.	Once excess current has tripped the device fuse, it must be replaced by an authorised service agent.	Professional Intervention Required
`N/A`	The battery charger isn't working, its power LED won't light up (undervoltage/sulfation found during check).	The preliminary check found undervoltage or sulfation, and the charger's switched to rescue mode.	If the battery can be recovered, charging starts on its own. If not, it's dead and needs replacing.	DIY Safe
`N/A`	The battery charger isn't working, its rescue-mode LED is lit (LiFePO4 undervoltage protection).	For LiFePO4 batteries only - undervoltage protection has kicked in because voltage's too low.	Hold the mode button for at least 5 seconds to reset, then wait 30 seconds. If voltage doesn't reach the constant-current threshold, the battery's dead and needs replacing.	DIY Safe
`N/A`	The battery charger isn't working, its error LED is lit (loose or wrong clamps).	The battery clamps are loose, wrongly connected, or not connected at all.	Disconnect the charger from the power supply, make sure the clamps are firmly and correctly attached, reconnect, then keep the button pressed for 5 seconds or more to reset.	DIY Safe
`N/A`	The battery charger isn't working, its error LED is lit (wrong charging program).	The charging program isn't set correctly for the battery in use.	Check the charging program's setting, and press the mode button to select the right one for the battery in use.	DIY Safe
`N/A`	The battery charger isn't working, its error LED is lit (overvoltage protection).	Overvoltage protection has kicked in - the battery voltage's too high.	Reduce the connected voltages, then hold the mode button for at least 5 seconds to reset.	DIY Safe
`N/A`	The battery won't take a charge, or can't hold one.	The battery is exhausted or significantly sulfated.	Replace the battery.	DIY Safe
`N/A`	Charging's taking unusually long, and the battery's not fully charging.	The charging program isn't set correctly for the battery in use.	Check the charging program's setting, and press the mode button to select the right one for the battery in use.	DIY Safe