Service; Tools For Service; Performing A Diode Test; Remove Component From A Quick Connector - Dometic RO400 Service Manual

tOOls fOR seRViCe

Below listed tools, shown in fig. l, facilitates service:
1. Inlet pressure gauge
, control flowing inlet pressure 0-10 bar.
2. hose cutter
.
3. System pressure gauge
4. Tee-handle
, simplifies work with the brass gable.
5. handheld conductivity meter
6. hose gripper .

peRfORming a diOde test

A broken diode (LED) can make the fault identification difficult
by giving the erroneous code on the control panel. Therefore, it is
advisable to always start by performing a diode test.
1. Disconnect and reconnect the water purifier to electrical
supply. The diode control starts.
2. control sequence:
The ON/OFF lED lights up and goes out.
1)
Filter I and Filter II lEDs lights up and goes out.
2)
Purification level i, II and III lEDs lights up and
3)
goes out.
Stop
lEDs lights up and goes out.
4)
3. If any diode does not work properly, change the circuit
board.
RemOVe COmpOnent fROm a quiCk
COnneCtOR
The numbers within brackets refer to fig. M.
Most of the connectors inside the water purifier are quick connec-
tors. The sealing is done with one or two o-rings in the connector
and barbs holds the hose or component firmly in position.
To remove a hose or component from a quick connector.
1. With help from a suitable tool (hose gripper), press the
grey ring against the connection and hold (1).
2. Pull out the hose (or component)

CHanging inlet ValVe

The numbers within brackets refer to fig. N.
1. Disconnect the water purifier from electricity and water
supplies.
2. Remove the top cover by releasing two screws at the
rear (1).
3. Remove the inlet water hose.
4. Disconnect the wires from the inlet valve (
5. Release the inlet valve from the casing by removing the
screws holding it (3).
6. Release the inlet valve (by unscrewing the hose clip (
and remove the hose or remove hose with adaptor from
the inlet valve's quick connector (5)).
7. Install the new inlet valve and secure to the casing us-
ing the screws.
8. connect the wires to the inlet valve.
9. connect the inlet water hose to the valve and open the
water supply.
10. Connect to electricity and the product will start to flush.
11. check for leakages.
12. Put back the top cover.
, 1/8R thread and 0-25 bar meter.
(2)
2).

seRViCe

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