Spectra Water maker

[Kedgeman]

Hi I recently purchase a Lagoon with a Catalina 300 compact water maker. The unit had not been used for 4 years.
I have replaced both membranes, the Clark pump was sent to the spectra agent here in New Zealand as it was leaking. This was repaired and tested.
I have just fitted a new mag 100 pump.
I am still not producing drinkable water.
I suspect the salinity probe is faulty as it continues to read 600 ppm.
I didn’t believe this would cause the problem so I have not replaced it.
The MPC board appears to be working correctly.
The agent here in NZ has been helpful but unfortunately he is now off work on sick leave.
Hopefully someone can help.