Hkoenig expro980 Manuel D'instructions page 15

5.Press and hold the Hot water button for 5s, the machine
will enter the automatic cleaning function, then turn the
steam knob to the Max position. During the automatic
cleaning process, the descaler solution will flow out from
the filter holder, hot water pipe and steam pipe respectively,
after 10-15 minutes, the cleaning function is completed, the
machine enters the power-off state.
6. After removing scale, fill clear water into water tank,
repeat step 4 until descaler solution is cleaned up.
7. After cleaning, clean water tank and drip tray.
Note:
1) During automatic cleaning process, a suitable container
(about 2L) shall be placed at the filter holder outlet and
hot water outlet to receive water.
2) During cleaning, the pump will start and stop
intermittently. This is a normal phenomenon.
3) During cleaning, the steam knob must be turned on. If
the automatic cleaning function is switched to clean
steam tube, the machine will alarm once the steam knob
is turned off. At this time, the steam knob shall be turned
on and the water will flow out of the steam tube.
4) It is recommended that the user shall perform descaling
operation after 1000 working cycles. If the total working
cycle of the machine reaches 1000 cycles, there will be
a reminder signal once the machine is turned on (four
indicators on the panel will flash red twice), which
reminds user to perform descaling.