Kärcher HDS Middle series Service Manual page 28

Unit Function
2.8 Scale inhibitor
1
3
Top RFID unit with inserted scale inhibitor bottle
4
Scale inhibitor bottle holder
Scale inhibitor bottle seal
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3
2
2
1
5
HDS Middle Range / HDS Premium Range
2.8.2 Metering via RFID (European version)
The scale inhibitor is metered in accordance with
the setting at the Service switch. The setting is
described under 2.6 Service switch. Metering
takes place in Program switch position „Eco"
and „Hot Water" only, at a water temperature set
to 50 °C.
The empty signal is sent via the level sensor in
the scale inhibitor tank or via the read-write
electronics in conjunction with the tag on the
bottle. A new scale inhibitor bottle must be
inserted within 5 operating hours, otherwise the
burner switches off to protect against limescale
and a corresponding fault message appears.
Burner operation cannot be recommenced until
after a new original scale inhibitor bottle has been
inserted. An already empty but refilled bottle will
not be accepted.
The bottle operates with internal partial vacuum.
If the bottle is damaged or drilled open it quickly
empties.
Faults due to scale deposits are to be expected
if the burner is operated with water containing
calcium carbonate without scale inhibitor.
Note
The metering may not be switched off if
using RM 111 (see Chapter 2.6).
1 Scale inhibitor bottle with RFID tag
2 Top RFID unit
3 Retaining screws, top RFID unit (2x)
4 Bottle opener insert
5 Seal, scale inhibitor bottle
Service Manual 04.2008