Sera SERAMIC, Инструкция по применению, Страница: 18 / 149

Problem Possible cause Troubleshooting
Readout display drifts during
adjustment
Electrode is dirty or covered with
algae Clean with sera cleaning solution,
then soak in sera care solution KCl
Electrode has been dried for long
period Soak electrode for 12 hours, then
recalibrate. Replace electrode if
electrode calibration is unsuccessful
CO
2
or air bubbles reach the tip of
electrode
Move the electrode to another
place in the aquarium
Electrode too old / defective Replace
Electrode was / is immersed too
deep in the water Replace or move electrode to
another place in the aquarium
No display shown
Defective cable or electrode Replace
Water has entered the control unit See your retailer
Control unit is not connected to
electrical outlet Plug it in
Incorrect values displayed
Too old or contaminated test
solutions Replace with new test solutions
Protection cap left on the electrode Remove protection cap
Display shows “Err” during calibra-
tion process Calibration mistake Recalibrate, see “Calibration
process” (page 15).
Are the test solutions intact?
Despite low pH value, the system
releases CO
2
into the aquarium /
Despite high pH value, the system
does not release CO
2
into the aquar-
ium / Solenoid valve is not working
Solenoid valve is defective caused
by water damage. Either non-return
valve was not used or the non-
return valve is defective Needs repair (see your retailer)
Solenoid valve will not open Operating pressure at the pressure
reducer is too high – above 1 bar
(14.5 psi.) At first manual control: close CO
2
supply at the bottle. Shut off pres-
sure reducer and outlet valves.
Remove CO
2
hose from outlet valve.
Find out whether control unit is
working by changing the desired pH
value. If not
➙ see your retailer. If
yes, attach hose again and adjust
operating pressure (1 bar / 14.5 psi.)
correctly as described in the instruc-
tions for use
Troubleshooting
pH value rises despite the solenoid
valve is open
CO
2
bottle is closed Open CO
2
bottle
CO
2
bottle is empty Refill CO
2
bottle
CO
2
gas is expelled from water by
air stone, air diffusor, etc.
Avoid air bubbling in the water
Exceeds the maximum aquarium
size Increase CO
2
addition and install
additional sera CO
2
fertilization sys-
tem
No bubbles in the bubble counter Pressure reducer incorrectly adjust-
ed (insufficient or no operating
pressure) Increase operating pressure
Non-return valve incorrectly con-
nected Check valve fittings and correct
connection if necessary
Non-return valve clogged or
defective Replace
Leakage in hose system or in the
hose fitting Check hoses and fittings and
replace hoses if necessary
CO
2
consumption too high Leakage in CO
2
hose system or
hoses too long
Replace or shorten hose
Operating pressure too high Lower operating pressure at the
pressure reducer
Sealing ring between pressure reduc-
er and CO
2
bottle defective / dirty
Replace
Reactor dirty or water pressure too
low, CO
2
bubbles escape
Clean reactor or direct more water
into the reactor
18