Aquapure error code 170

[BarryK]

Hi all,

I've had the salt system off for a couple of years due to flaking of the flagstone around the pool. It is still flaking with chlorine so I am thinking of going back to salt. I wanted to test the system to see if it is still working before I add salt. Salt level is low now, 800 ppm. It is an older (probably 2007?) APURE1400 system, S/N A07GK2132. It is set up with 240 V input.

I am getting a steady service light with code 170. I have the detailed troublehooting flow chart but maybe someone here can point me in the right direction. Other threads have said that the flow sensor is often the culprit.

I have gone through the tests in the troubleshooting guide:

Back board test points:
1-8, 78.3 V AC (spec is 75)
2-7, 69.5 V AC (spec is 65)
3-6, 20.4 V AC (spec is 21)
4-5, 0 mV DC (spec is 120) Cell is off when service light is on?
Green to Black/White leads to cell, 0.024 V DC (spec is 22-28) Again, cell is presumably turned off when service light is on?

Front board test points:
K-H, 0 mV DC (spec is 120)
A-C, 20.4 V AC (spec is 21)

I disconnected the flow/salinity/temp sensor from the front board and restarted the sytem:
The service light stayed off and the 170 code did not come on.
Front Board test button procedures (R temp, H temp, Salinity) all gave normal readings.

I reconnected the sensor to the front board. I cleaned the sensor; there was not any significant corrosion on the metal surfaces. The service light and code 170 came on again.

I took off and inspected the salt cell. It is pretty old but looked clean without significant build up of scale.

Next step: replace the sensor and see what happens?

Thanks,
Barry

 

[TinFoilHat]

How are you measuring the salt level? If it's with a Taylor salt kit then your salt is way too low for the SWG to work properly. Not knowing your cell specs, I would bet the salt should be more like 2400 ppm or more for the SWG to work. It sounds like you may have drained and replaced all of your water since you stopped using the SWG and now you only have naturally occurring salt in the water from liquid chlorine.

 

[BarryK]

I measured the salt level using the Taylor kit. I realize that it is very low. I wanted to see if the system was still working after being off for a few years, before adding the salt.

Do you think that adding salt up to normal levels will take care of the service light and error code 170? The spec for this unit is 3000 - 3500 ppm.

Thank you,
Barry

 

[TinFoilHat]

It will if the cell is still operational. If you intend to make this a salt water pool again so you can put a SWG on it, even if it's not this one, then raise your salt level.