Troubleshooting Guide - Hayward EZ-CHEM Manual Del Usuario

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
"Flow" flashing Insufficient flow or no flow
Setting time too low
Acid container empty
Rigid injection pipe blocked or pinched
OFA Alr (pH)
Peristaltic pump problem
pH reading incorrect or unstable
OFA STOP (pH) pH level not reached after 3 cycle times
Setting time too low
Chlorine container empty
Rigid injection pipe blocked or pinched
OFA Alr (Rx)
Peristaltic pump problem
Redox reading incorrect
Redox level not reached after 3 cycle
OFA STOP (Rx)
times
Parameter error System error
pH probe calibration problem
Error 7 pH pH probe faulty
pH buffer solution out of date
pH probe calibration problem
Error 4 pH pH probe faulty
pH buffer solution out of date
Rx probe calibration problem
Error 465 mV Rx probe faulty
Rx buffer solution out of date
pH Alarm Band
(Right-hand pH reading at  1 .5 of the set point
display)
ORP Alarm Band
ORP reading at  3 00 mV of the set point
(Left-hand display)
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USE ONLY HAYWARD GENUINE REPLACEMENT PARTS
Recommendation
Check the operation of the flow switch; if the contact is
closed, "FLOW" remains steady, otherwise it flashes.
Check that the filter pump is working correctly
Check the operating periods on the programming clock
Ensure that all the valves are open
Ensure that the water flows freely in the pipes
Increase the pH OFA alarm time (20 minutes to
240 minutes)
Replace the acid container
Inspect the acid injection pipe, replace if necessary
Check pump operation, press the (+) button to force it to
operate, replace the pump if faulty
Inspect the membrane, replace if necessary
Check the water balance and recalibrate the pH probe
See recommendation for pH OFA Alarm
Increase the Redox OFA alarm time (20 minutes to
240 minutes)
Replace the liquid chlorine container
Inspect the chlorine injection pipe, replace if necessary
Check pump operation, press the (-) button to force it to
operate, replace the pump if faulty
Inspect the membrane, replace if necessary
Check the water balance and recalibrate the ORP probe
See Rx OFA Alr recommendation
Restore the default settings
Electronic problem, replace the device
Repeat the calibration
Check the pH probe connection with the BNC connector
on the housing, inspect the probe and the cable
Obtain a new solution
Repeat the calibration
Check the pH probe connection with the BNC connector
on the housing, inspect the probe and the cable
Obtain a new solution
Repeat the calibration
Check the connection of the Rx probe with the BNC
connector on the housing, inspect the probe and the
cable
Obtain a new solution
Check the connection and calibration of the pH probe.
Correct the pH manually so that it reaches the set point.
Check the connection and calibration of the ORP probe.
Manually correct the disinfectant level and the balance of
your water.
EZ-CHEM
Action
The fault automatically
disappears once the
problem is resolved
Press CAL Enter to
remove the fault
Or set the pH OFA alarm
to OFF.
Press CAL Enter to
remove the fault
Press CAL Enter to
remove the fault
Or set the Rx OFA alarm
to OFF.
Press CAL Enter to
remove the fault
N/A
The fault automatically
disappears once the
problem is resolved
The fault automatically
disappears once the
problem is resolved
Rev. D