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INSTaLLaTION
appliance shutdown
12. Appliance shutdown
f Isolate the appliance from the power supply by means of the
fuse/MCB in your fuse box or by pulling the power cable plug
from the socket.
f Drain the appliance (see chapter "Maintenance").
13. Troubleshooting
problem
Cause
The appliance will not
The aerator in the tap is
start despite the DHW
scaled up or dirty.
valve being fully open.
The sieve in the cold water
line is blocked.
The heating system is
faulty.
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14. Maintenance
14.1 Draining the appliance
remedy
Clean and/or descale the
aerator or replace the spe-
cial aerator.
Clean the sieve after
If the appliance needs to be drained for maintenance or to protect
shutting off the cold water
the whole installation when there is a risk of frost, proceed as
inlet line.
follows:
Check the resistance of
f Close the shut-off valve in the cold water inlet line.
the heating system and
replace the appliance if
f Open the draw-off valve.
required.
f Undo the water connections on the appliance.
DANGER Electrocution
Before any work on the appliance, disconnect all poles
from the power supply.
DANGER Scalding
Hot water may escape during draining.
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