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6. Reset to factory presetting
Should your Dupla pH-Control Pro not function correctly, please perform a reset:
1. Unplug from the mains
2. Plug the mains plug back in while keeping the button pressed down
3. Release the button
Please note: All programmed settings, except those for the clock, will be lost. The Dupla pH-Control Pro will
regulate with the manufacturer’s presettings.
7. Factory presetting
Clock setting: 12:00:00 (at delivery)
pH point: 7.0
Audible pH alarm: Deactivated ( )
Visual pH alarm: Deactivated ( means ‘no alarm‘)
pH calibration memory function: On
Night function / CO
2
supply during the night: On (not permanent on but regulated corresponding
to day programmation)
Timer mode: (means ‘automatic’)
8. Sources of faults
In the case of a problem, first reset to the manufacturer’s presettings. If the does not solve the problem, please search
for the fault in the following table:
Error Possible causes Solution
Fluctuating pH
value
pH electrode cable too close to a mains cable
or a CO
2
reactor
Re-locate pH electrode cable
is displayed
pH electrode defect replace pH electrode
is displayed
programming error in the time settings on slot
2
Ensure that the programmed times do not
overlap
In the event of a warranty or repair issue, please return to the place of purchase.
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