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Hayward EZ-Chem Manual

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USE ONLY HAYWARD GENUINE REPLACEMENT PARTS
Page 13 of 13 EZ-CHEM Rev. B
Troubleshooting guide
As most malfunctions are related to a poor water balance, we advise you to check it before handling the product (see
chemical water balance).
Alarm text Possible causes Recommendation Action
“Flow” ashing Insufcient ow or no ow
Check the operation of the ow switch; if the contact is
closed, "FLOW" remains steady, otherwise it ashes.
The fault automatically
disappears once the
problem is resolved
Check that the lter pump is working correctly
Check the operating periods on the programming clock
Ensure that all the valves are open
Ensure that the water ows freely in the pipes
OFA Alr (pH)
Setting time too low Increase the pH OFA alarm time (20 minutes to
240 minutes)
Press CAL Enter to
remove the fault
Or set the pH OFA alarm
to OFF.
Acid container empty Replace the acid container
Rigid injection pipe blocked or pinched Inspect the acid injection pipe, replace if necessary
Peristaltic pump problem
Check pump operation, press the (+) button to force it to
operate, replace the pump if faulty
Inspect the membrane, replace if necessary
Difculty reading the pH or unstable pH Check the water balance and recalibrate the pH probe
OFA STOP (pH) pH level not reached after 3 cycle times See recommendation for pH OFA Alarm Press CAL Enter to
remove the fault
OFA Alr (Rx)
Setting time too low Increase the Redox OFA alarm time (20 minutes to
240 minutes) Press CAL Enter to
remove the fault
Or set the Rx OFA alarm
to OFF.
Chlorine container empty Replace the liquid chlorine container
Rigid injection pipe blocked or pinched Inspect the chlorine injection pipe, replace if necessary
Peristaltic pump problem
Check pump operation, press the (-) button to force it to
operate, replace the pump if faulty
Inspect the membrane, replace if necessary
Difculty to read Redox Check the water balance and recalibrate the ORP probe
OFA STOP (Rx) Redox level not reached after 3 cycle
times See Rx OFA Alr recommendation Press CAL Enter to
remove the fault
Parameter error System error Restore the default settings N/A
Electronic problem, replace the device
Error 7 pH
pH probe calibration problem Repeat the calibration
The fault automatically
disappears once the
problem is resolved
pH probe faulty Check the pH probe connection with the BNC connector
on the housing, inspect the probe and the cable
pH buffer solution out of date Obtain a new solution
Error 4 pH
pH probe calibration problem Repeat the calibration
pH probe faulty Check the pH probe connection with the BNC connector
on the housing, inspect the probe and the cable
pH buffer solution out of date Obtain a new solution
Error 465 mV
Rx probe calibration problem Repeat the calibration
Rx probe faulty
Check the connection of the Rx probe with the BNC
connector on the housing, inspect the probe and the
cable
Rx buffer solution out of date Obtain a new solution
… 27 …


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