Question 1

All the LEDs flash 5 times in a row and a buzzer sounds, repeating after a brief pause.

Accepted Answer

Possible cause: The PCB is overheated.. Let the charger cool down, then restart it once the house battery's no longer fully charged.

Question 2

The alternator and solar panel LEDs stay lit continuously.

Accepted Answer

Possible cause: Ambient temperature is below -2°C with flooded or LiFePO4 charging curve selected.. This is normal protective behaviour - the LEDs switch off once the ambient temperature climbs back above 0°C.

Question 3

The alternator LED gives 6 flashes.

Accepted Answer

Possible cause: Voltage drop detected at alternator, insufficient alternator power, cable power failure, or electronic malfunction.. Ensure cables have a minimum cross-section of 10 mm² (or 16 mm² if length > 2 m). Ensure connections on sockets 1, 2, 3, and 6 are secure and correctly connected.

Question 4

The charge was interrupted, starting battery overcharged, solar panel overvoltage, or alternator overloaded.

Accepted Answer

Possible cause: Incorrect battery type, incorrect charging curve, starting battery overheated/swollen, solar overvoltage, or high voltage drop on positive/negative side.. Ensure suitable battery type and charging curve are selected. Check that starting battery and ambient temperature are within limits. Verify voltage drop on positive and negative circuits is less than 0.2 V under load. Check alternator voltage regulator and fuses.

Question 5

After a while, the charger reduces its output current and then turns itself off.

Accepted Answer

Possible cause: The battery charger and/or power source is overheated.. Let the charger cool down - it switches back on by itself once its temperature drops.

Dometic NDS Power Service Plus / Gold

Technical Specifications

Master Troubleshooting & Diagnostics Matrix

Error Code / Indicator	Symptom / Meaning	Possible Cause	Step-by-Step DIY Fix	Suggested Actions
`N/A`	All the LEDs flash 5 times in a row and a buzzer sounds, repeating after a brief pause.	The PCB is overheated.	Let the charger cool down, then restart it once the house battery's no longer fully charged.	DIY Safe
`N/A`	The alternator and solar panel LEDs stay lit continuously.	Ambient temperature is below -2°C with flooded or LiFePO4 charging curve selected.	This is normal protective behaviour - the LEDs switch off once the ambient temperature climbs back above 0°C.	DIY Safe
`N/A`	The alternator LED gives 6 flashes.	Voltage drop detected at alternator, insufficient alternator power, cable power failure, or electronic malfunction.	Ensure cables have a minimum cross-section of 10 mm² (or 16 mm² if length > 2 m). Ensure connections on sockets 1, 2, 3, and 6 are secure and correctly connected.	DIY Safe
`N/A`	The charge was interrupted, starting battery overcharged, solar panel overvoltage, or alternator overloaded.	Incorrect battery type, incorrect charging curve, starting battery overheated/swollen, solar overvoltage, or high voltage drop on positive/negative side.	Ensure suitable battery type and charging curve are selected. Check that starting battery and ambient temperature are within limits. Verify voltage drop on positive and negative circuits is less than 0.2 V under load. Check alternator voltage regulator and fuses.	DIY Safe
`N/A`	After a while, the charger reduces its output current and then turns itself off.	The battery charger and/or power source is overheated.	Let the charger cool down - it switches back on by itself once its temperature drops.	DIY Safe