Dometic RO400 Service Manual page 23

symptom
The water purifier
b)
has stopped due to
15-minute error cut
out (domestic
models) - or -
performs automatic
flushing (commer-
cial models).
6
Something blocks
c)
the flow.
d) The outlet pressure
sensor is broken or
erroneously cali-
brated.
7
e)
There is a warning
for an error in the
water quality meas-
uring device.
8
f)
The TDS-sensor
calibration has been
started, but not
completed correctly.
(Probable cause-
the tap has been
turned off before
the procedure was
completed).
tROuBlesHOOting
possible error
Check/action
codes
The green ON/
OFF light is lit.
20 min. cut out
(domestic
models).
• check that nothing blocks
the flow, such as a bent/
kinked hose.
• check that the water puri-
The calibration fiers starts to flush when it
has been started is reconnected to electrical
supply, but does not start
but not completed
properly normally when faucet/valve
is opened after the self-
flushing has finished.
Error in the wa- • check the TDS-sensor.
ter quality meas-
• Measure the conductivity of
uring device.
the pure water.
• Recalibrate the product.
wandering
Remedy
x Domestic model: Restart the product.
commercial model: Wait for 2 minutes.
x
The water production starts automatically
when flushing is completed.
Unplug the outlet pressure sensor and make
sure the pure water faucet/valve is open.
If the product starts to produce water:
Recalibrate the outlet pressure sensor, see
x
"
SERVIcE
If the recalibration does not solve the prob-
x
lem - change the outlet pressure sensor. (It is
possible to run a test first by using the inlet
pressure sensor as a replacement.)
x If the systems works when the inlet pressure
sensor is used - put back the inlet pressure
sensor and replace the outlet pressure sensor.
check that the pins of the sensor are not
broken. Make sure that the soldering at the
connection to the PcB is not bad.
If the inlet water is "extremely" pure, contact
your dealer.
x
If the product is new, recalibrate it one more
time.
x
If the product has been used by the end user,
measure the conductivity of the pure water
and the inlet water. If the purification is suf-
ficient, recalibrate the product.
The product should never be recalibrated
unless water conductivity is measured and
the purification is found to be oK!
- 23 -
".
CAUTION