Dometic RO400 - Indicator Lights and Button; Inlet Water System

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INLET WATER SYSTEM
The inlet hose is connected to the inlet valve (normally closed). When the
outlet pressure sensor  detects a low pressure (lower than the preset start pres-
sure), does the printed circuit board (PCB)  energize the inlet valve, and the
valve opens (and the motor starts). The inlet valve includes a screen lter, for a rst
coarse particle ltration.
The inlet water ows to the integrated prelters  that consist of two lter
cartridges, congured in
- serial ow (in most RO400-models) or
- parallell ow (in most RO600-models)
The purpose of the preltration is to protect the membrane , from mechanical and
chemical wearing. Better preltration gives longer service life of the membrane and
the product overall.
In serial ow does the preltration consist of one particle (sediment) lter and
one granulated activated carbon (GAC) lter . The particle lter removes par-
ticles larger than approx 10 µm. The carbon lter reduces Chlorine (Cl
2
), which is
important as the surface the membrane otherwise is damaged by Chlorine over time.
In parallell ow does the preltration consist of two identical carbon block lters
. The carbon block combines particle removal (larger than approx 5 µm) and
Chlorine reduction in one cartridge. The advantage of parallell ow is the lower
pressure drop, which becomes more important at high water ow (RO600 compared
with RO400). The ner particle ltration gives an improvement not only on the
membrane service life, but also the integrated high pressure pump .
3
1
H
F
In the following, the letters/numbers within brackets refer to gure.
INDICATOR LIGHTS AND BUTTON
On the control panel of the water purier there are seven indicator lights (diods,
LEDs) and one push button, see g. F.
stop The product has stopped working. ‘stop’ alone or
with another diod gives an error code indicating the fault.
 Change prelter/s/.
Too low pressure at the inlet, caused by blocked lters/s/,
low water supply pressure e.g.
on/off Indicates that the product is switched on (power on).
 Change prelter/s/.
Filter/s/ consumed due to time in use.
 Low purication level.
 Good purication level.
 High purication level.
calibration button Push button to
- calibrate levels for purication level,
- reset timer function of ‘lter II’,
- enter varios modes and control
functions useful during service.
For more information about indications, see “TROUBLESHOOTING”.
Indicator lights
An accessorie, see g. G, aimed for products installed under kitchen sink when
control panel is not always visable. It is intended to be mounted below the drinking
water faucet and connected to the indicator contact on the product backside.
- Green light indicate ‘purication level II / III’.
- Red light indicate ‘purication level I’
PRODUCT DESCRIPTION
2
1. Particle lter
2. Granulated Activated
Carbon (GAC) lter
3. Carbon block lter
G
Indicator lights