Dometic RO400 - Page 28

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Symptom
Possible error
codes
Check/Action Remedy
The measured
conductivity indicates
a problem with the
purication.
Flushing does not
work properly. Bro-
ken reject valve.
17
Low pump pres-
sure.
18
Broken membrane.
Poor recirculation
ow.
19
Disconnect and connect •
the water purier. Flushing
starts and allows cold water
to enter the product.
Verify that the:
ushing commence after -
the tap/valve is closed,
reject ow is normal, and -
reject valve is energized. -
Measure the pump •
pressure.
Measure the conductivity in •
the inlet and the pure water.
Measure the conductivity of •
the pure water continuously
(several minutes).
If conductivity increases •
continuously after start
of pure water production,
check that:
The bottom of the mem- -
brane is not blocked due to
fouling, particles etc.
The membrane tape has -
not been unwinded (as-
sembly has to be dis-
mounted).
The reject ow is:
3 l/min — RO600C x
2 l/min — RO400B, RO400BC and RO400C x
0.8 l/min — RO400. x
Replace the reject valve if the reject ow is
> 5 l/min or much lower than the values given
above.
If the reject valve is not energized, check the
connections. Install a new PCB to see if that
solves the problem.
If the pump pressure and the water ow is low
in addition to a poor water quality - change the
pump, see “SERVICE”.
If the ow is OK and the water quality poor
from the start and it does not improve - change
the membrane, see “SERVICE”.
TROUBLESHOOTING
f)
e)
c)
d)