2019/08 - Indice de révision : D - Code : 29650
TRAITEMENT DE L'EAU
65/72
9.10
pH/Redox circuit board fault (EES Pro only)
NO CARD
sensor connection board not detected.
•
Cut power to the electrical/ control panel
, open the connection terminal compartment.
•
Remove the sensor PCB from its housing and check that the pins are clean and in good condition. Reinsert
it fully into its housing.
10.
MAINTENANCE
10.1
Maintenance of ph and redox sensors (EES Pro only)
During use, scale may build up on the pH and Redox sensors, or a greasy deposit may accumulate on
their tips. This may be the case if their response times are getting longer.
The sensors should be removed from their mounting tee and inspected at regular intervals (first make
sure that the by-pass loop inlet and outlet shut-off valves are closed, and place a bucket under the tee to
collect any water).
!
NEVER CLEAN THE TIPS OF THE SENSORS BY RUBBING OR WIPING THEM
If necessary, descale the electrodes by soaking the tips of the electrodes in a 10% solution of Hydrochloric
acid for a few minutes.
To degrease the sensors, dip them in soapy water and agitate them. Rinse the sensors thoroughly after
degreasing.
After being descaled and degreased, the sensors should be recalibrated (see the next paragraph),
and the correspondence between the Redox potential measured by the Redox sensor and the actual
concentration of free Chlorine should be verified.
!
Always keep the tips of the pH and ORP sensors submerged in liquid. Drying will damage the sensor
and void its guarantee.
10.2
Calibrating the ph sensor (EES Pro only)
The sensor must be clean (see the previous paragraph)
10.2.1 Frequency of calibration
The ph sensor should be calibrated :
•
The first time the device is put into operation,
•
upon reopening the pool after winterizing,
•
Approximately every 4 weeks during the pool season.
10.2.2 Materials required
Calibration requires the following materials:
•
Glass of tap water, or a tap nearby
•
Buffer solution pH = 7
•
Buffer solution pH = 4
10.2.3 Procedure:
•
Start the device leaving the filtration pump off (S
T-BY mode
), close the valves of the by-pass loop on which
the tee housing the sensors is mounted. (place a bucket under the tee to collect any water)
•
Remove the pH sensor, rinse it and shake it to remove any drops without wiping it, then immerse it in a
buffer solution
pH = 7
•
Wait 2 minutes, moving the sensor gently in the solution every now and then.
