Rational SCC Series

170
Trouble shooting SCC
Edition 10-2008a
Service 12 / Indication descaling
Steam generator scaled up; CDS display shows 9 red bars
Indication „Descaling of
steam generator necessary“
YES
Is additionally Service 12
shown?
CDS-Sensor does not create
pulses
Check CDS-Sensor, cable and
connector.
Touch function key:
degree of scale is shown
Only 2 to 3 red bars are
shown on ?
Repeat descaling procedure
NO
NO
Activate and run descaling pro-
gram. At the end of the program
the new  lling volume is genera-
ted automatically.
Was the descaling
procedure suf cient?
(Visual check via level elec-
trode)
Unit ready for work
YES
NO
Water supply not suf cient:
- Water pressure too low
(below 50 kPa)
- Water  lter soiled
- CDS Sensor soiled
- Water intake pipe of steam
generator scaled up
(Pipe must be descaled separa-
tely)
YES
NO