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In the unlikely event that you are experiencing a problem with your system, please follow the steps below to in order to isolate and rectify the problem.

Problem - My system fills but doesn’t drain?

Solution - This is usually a problem with the pump in the brain pot. If the pump is vibrating but not pumping it will be either air locked or blocked. Simply twist the pump so the inlet faces up, if air bubbles are released and the pump starts working the problem is fixed. If this happens regularly make sure the brain’s fill inlet is not pouring water onto or near the pump. If it is simply turn the elbow fitting so it is pouring onto the side of the brain pot and not splashing the surface of the water.

If the pump is vibrating in the brain pot, and does not release any air bubbles when turned it may be blocked. To service the pump you should turn the power off, remove the front of the case from the Maxijet 1000 and inspect the impeller and inlet. Remove any debris, replace the pump’s casing and check whether it is now working.

If the pump in the brain pot is not vibrating or pumping then check the bottom float switch. Check it can move freely, clean with water if not.

If after trying these solutions your system is still not working you will need to contact the retailer you bought the system from. Alternatively you can contact the returns/repairs department at IWS directly as you may have developed a faulty pump, timer unit or float switch.

Problem - My system won’t stop filling/my pots are over flowing!?

Solution - This is usually down to a siphoning effect that causes the pump in the reservoir to keep filling the brain pot at a reduced rate when the power switches off. Check that the anti-siphon valve in the reservoir is not underwater or blocked. The anti-siphon valve should be near the top of the reservoir and is coloured red and black. This allows air into the pipe when the pump turns off to stop the water from flowing. If you do not have an anti-siphon valve you will have a small hole drilled in the pipe work coming up from the pump at the top of the reservoir. Check that this is not blocked.

If your pump is not siphoning and carries on filling the brain pot at full power then it may be down to a faulty top float switch in the brain pot. Make sure that the float switch is clean and free from debris. If it is clean and not being forced open then you will need to contact the retailer you bought the system from. Or contact the returns/repairs department at IWS directly as you may have developed a faulty pump, timer unit or float switch.

Problem - Some of my pots are over-flooding!?

Solution - If you have an uneven floor and some or all of the pots are lower than the brain then you will get some over filling. You must ensure that all pots are at the same level as the brain pot, this is essential to how the systems works.

Problem - Why is the EC/CF is rising rapidly in the reservoir?

Solution - Nutrient strength normally rises slowly in the reservoir as plants generally use more water than nutrients. If your temperatures are high (above 29ºC) and relative humidity is constantly low (below 50%) the rise in nutrient strength will be accelerated. These environmental conditions can cause a quick rise in nutrient strength between irrigations as the nutrients will be accumulating in the pots. Add more water to the reservoir to dilute the nutrient strength and consider reducing the nutrient strength by 0.2-0.4 EC units (2-4CF).

This can also be a sign that your flood frequency is too low and the growing media is being allowed to dry too much between flood cycles. Consider increasing the flood frequency.

Problem - Why is the pH dropping rapidly in the reservoir?

Solution - pH drop can sometimes be a normal occurrence during the transitional phase from vegetative growth to flowering/fruiting. Adjusting back up with potassium hydroxide (pH up) or potassium silicate (Silicon) is recommended.

If the pH is dropping rapidly then it may be a sign of over-watering. If your flood frequency is too high and water is constantly saturating the growing media then oxygen levels become depleted. This drop in oxygen will cause the pH to fall. Another problem associated with over-watering is an increased susceptibility to root diseases. Check your growing media is not staying too wet between irrigations. If it is, consider reducing the flood frequency.

Problem - Why is the pH rising rapidly in the reservoir?

Solution - pH will normally rise slowly in the reservoir due to normal nutrient uptake by the plants. If you are finding the pH is climbing rapidly and you are adding lots of pH down it is normally due to your clay pebbles. Sometimes if you fail to wash the clay pebbles properly and do not pre-treat them with nutrient solution at the correct pH, a pH rise can happen in early growth. The pH will stabilise given time. If you are adding lots of pH down we recommend you use a mixture of nitric acid and phosphoric acid, this will help the balance of minerals in the nutrient solution.

If you continue to have problems please download the fault diagnosis aid in order to carry out a full test of the system. If your problem persists please contact your retailer.

Please note, IWS Systems contain NO serviceable internal parts. Any attempt to open or tamper with the system may cause electric shocks and will invalidate your warranty.

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