Maintenance; Replacing The Filters - Dometic RO 400 User Instructions

MAINTENANCE

Replacing the filters

It is important to replace the filters as soon as they need replac-
ing, since their main function is to protect the membrane. Check
for any signs of leaks just after you have replaced them and again
after you have used the appliance a few more times.
TO REPLACE FILTER I
Replace filter I when the indicator lamp for filter I comes on.
1 Make sure that the tap for purified water is turned off
and that the appliance is not flushing.
2 Disconnect the electrical plug. Open the front cover
(in front of the two filters) as shown in the illustration.
3 Pull the filter containers outwards as far as they will
come.
4 Use the filter spanner to undo the container to the left
marked I. Bear in mind that the container will be full
of water and that some water may spill!
5 Mop up any water inside the base of the appliance.
6 Remove the old filter.
7 Clean the filter container with water and a brush.
8 Put the new filter in place, with the I label pointing
upwards. Make sure that the sealing ring is in place in
the grooves of the filter container.
9 Refit and tighten the container using the filter spanner.
Tighten the filter container so that the dot is some-
where between the two outermost white lines.
10 Slide the filter containers back into the appliance.
11 Close the front cover and reconnect the electrical plug.
Flushing will take place automatically.
This completes the procedure for replacing filter I, and the
water purifier is ready for use again.
TO REPLACE FILTER II
Replace filter II when the indicator lamp for filter II comes on,
and when you notice a three-second delay before the motor
starts up each time you turn on the tap.
1-11 Work through the 11 steps in the instructions for
replacing filter I, but remove container II instead
(on the right), and replace the filter in that.
12 For filter II you have to finish by resetting the
appliance. Make sure that the tap (purified water) is
turned off and the electrical supply is connected.
Then press the Calibration button on the control
panel, and keep it pressed inwards until the pattern
of indicator lights for filter II has gone out (takes
about five seconds).
This completes the procedure for replacing filter II , and the
water purifier is ready for use again.
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