The Automatic is a separate system which can be fitted to Nexus filters, to enable automatic cleaning. By combining timers and automatic valves, Nexus can be converted and set to clean itself, as little or as often as required. It can be set to clean at night or while you are on holiday, and once set it means total hands-off cleaning. The more your filter is cleaned, the more that waste is removed from the system before being broken down. That means a cleaner pond, cleaner filter and healthier water.

The Automatic System can be fitted to all Nexus models manufactured after 2006, and both gravity fed or pump fed models. It can be fitted by the user or a pond filter installer. The Automatic system still requires a Nexus, airpump and a water pump, along with a power supply. During cleaning the Nexus will expel dirty water to waste, so an auto top-up fitted to the pond (not supplied,) is advised if the filter is set to clean frequently.

You first need to remove the sticker of the far right side box and change the last dial with a small screwdriver from 50% to 40%, this will extend the cleaning time by one minute.

• Check the wiring is correctly installed. Seek advice from a suitably qualified electrician if in doubt.
• Check the mains connection to the control box. Seek advice from a suitably qualified electrician if in doubt.
• Check the fuses inside the control box. These are located alongside the timer blocks within their own hinged compartments. The fuses are all standard glass fuses; 10 Amp, 5 Amp, 2 Amp, 2 Amp from left to right.
• Please be aware that every control box system is fully factory tested.

These are located alongside the timer blocks within their own hinged compartments. The fuses are all standard glass fuses; 10 Amp, 5 Amp, 2 Amp, 2 Amp from left to right.

Please see the image below, this is where you can locate the fuses.

As its an analogue timer the cleaning frequency will be purely based on time so for example once every 24h, you can dictate the time by pressing manual clean at say 6pm and then it will automatically clean at 6pm the following day. On a twice a day clean you would need to set it to twice a day and then select a manual clean at 9am it would then cycle 12 hours and do a clean at 9pm.

To locate the issue you will need to:

Check the relay furthest on the right in the auto box -
Check the fuse - Does it light up during a cleaning cycle?

If the relay is working as it should, you will need to check the motor. If it’s under warranty you will need to report back to where it was purchased from with a copy of your receipt and they can organise a replacement. However if it is out of warranty you will needs to purchase a new motor.

In a Nexus 220+ 140 litres of water in drained to waste.

In a Nexus 320+ just under 200 litres of water is drained to waste.