There are a number of causes related to this error code. It is important to identify the cause before replacing your membrane.
We have built-in our conductivity measurement to ensure water is always safe to drink. The "conductivity to high" signal can result from a number of causes.
- Membrane lifetime is over
The membrane is close to the end of its lifetime. The conductivity is increasing because the filter effectiveness is decreasing. The expected lifetime is 16-24 months, but this can be reduced by the following causes:
- High conductivity in input water (see 3.)
- Insufficient pre-filter replacement
- Hard water or Saltwater
- The system has been disconnected from the power for more than 1 week with the membrane(s) still inside
What to do:
Replace your old membrane with a new one. Membranes can be bought on our website
- Membrane Natural Osmosis
When the membrane stands still and there is a high conductivity input level, the membrane filter has to start-up production to decrease the conductivity. It may occur during the starting phase the starting conductivity is above the maximum level for a few seconds. Although this triggers the alarm, the system will restore the conductivity level within seconds. This form of Osmosis is a characteristic inherent to any membrane that uses flat sheet material (Reverse Osmosis, Nanofiltration, Ultra Filtration. The high (resting) conductivity may come from the following:
- High water temperature during the standby period. The temperature has a negative effect (increases conductivity) on the conductivity levels in the water, especially when the water stands still. More about the effect of temperature on conductivity can be found in our article " What is the effect of the water temperature on a TDS reading?"
- Natural Osmosis is the process that occurs when two fluids with different concentrations are separated by a semipermeable membrane from a different solution. This will be resolved when production starts
What to do:
- Natural osmosis is a common phenomenon and will only decrease during production. To assure water of the highest quality, please keep the faucet open en let it run for 10 seconds. When the production starts, the conductivity will directly decrease. For the Aquablu Pro, you can use a splitter in which the purified water outlet flushes the water to the reject water tank or drain.
- Input conductivity is too high
Our membranes have a 95% rejection rate with a maximum incoming ppm of 1500. High concentrations of the following can cause spikes in conductivity:
- Hard water (high levels of scale)
- High levels of pesticides (Natrium f.e.)
- Check incoming water quality and pre-filtration set up. To be sure about your incoming water quality, you can use a TDS meter to measure the overall ppm. In general, a laboratory test is preferred. When using a TDS meter, please remember the difference between ppm and conductivity.
- Wrong water control setting
- Too much wastewater will increase the quality to a certain stage because more water is flushed away keeping the membrane clean. This will on the other side decreases the flow rate as less permeate water is produced
- Too little wastewater will decrease the quality of the water. The membrane is not properly flushed and the pressure on the membrane is too high. This will result into a higher flow rate, but lower water quality. It will also strongly decrease the membrane lifetime in situations where groundwater is purified
- For the Aquablu One and Aquablu Pro models produced before Juli 2020, this will require you to adjust the in-board pressure regulator. For any of these adjustments, please call your local dealer, service provider, or the Aquablu HQ.
If any of the problems/solutions cannot be identified, please contact your Aquablu service partner of the Aquablu HQ directly.