Dometic RO400 - Tools for Service; Performing a Diode Test; Remove Component from a Quick Connector; Changing Inlet Valve

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TOOLS FOR SERVICE
Below listed tools, shown in g.  facilitates service:
Inlet pressure gauge , control owing inlet pressure 0-10 bar.
 .
System pressure gauge , 1/8R thread and 0-25 bar meter.
4. , simplies work with the brass gable.

6. .
PERFORMING A DIODE TEST
A broken diode (LED) can make the fault identication difcult
by giving the erroneous code on the control panel. Therefore, it is
advisable to always start by performing a diode test.
Disconnect and reconnect the water purier to electrical 1.
supply. The diode control starts.
Control sequence:2.
The 1) ON/OFF LED lights up and goes out.
Filter I 2) and Filter II LEDs lights up and goes out.
Purication 3) , II and III LEDs lights up and
goes out.
Stop4) LEDs lights up and goes out.
If any diode does not work properly, change the circuit 3.
board.
REMOVE COMPONENT FROM A QUICK
CONNECTOR
The numbers within brackets refer to g. M.
Most of the connectors inside the water purier are quick connec-
tors. The sealing is done with one or two o-rings in the connector
and barbs holds the hose or component rmly in position.
To remove a hose or component from a quick connector.
With help from a suitable tool (hose gripper), press the 1.
grey ring against the connection and hold .
Pull out the hose (or component)2. 
CHANGING INLET VALVE
The numbers within brackets refer to g. N.
Disconnect the water purier from electricity and water 1.
supplies.
Remove the top cover by releasing two screws at the 2.
rear ().
Remove the inlet water hose.3.
Disconnect the wires from the inlet valve (4. ).
Release the inlet valve from the casing by removing the 5.
screws holding it ().
Release the inlet valve (by unscrewing the hose clip (6. 4)
and remove the hose or remove hose with adaptor from
the inlet valve’s quick connector ).
Install the new inlet valve and secure to the casing us-7.
ing the screws.
Connect the wires to the inlet valve.8.
Connect the inlet water hose to the valve and open the 9.
water supply.
Connect to electricity and the product will start to ush.10.
Check for leakages.11.
Put back the top cover.12.
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SERVICE
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