OPERATION
Cleaning, care and maintenance
6
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4.3 Inlet temperature information
If the inlet temperature is higher than the preferred temperature,
e.g. if water has been preheated by solar energy, the display alter-
nates between showing "hot" and the measured inlet temperature.
The LED scalding risk indicator also flashes.
Recommended setting for operation with a thermostatic valve
and water preheated by solar energy
f
f
Set the temperature at the appliance to the max.
temperature.
4.4 Following an interruption of the water supply
!
Material losses
Following an interruption of the water supply the appli-
ance must be recommissioned by carrying out the follow-
ing steps, in order to prevent the destruction of the bare
wire heating system.
f
f
Disconnect the appliance from the power supply by
removing the fuses/tripping the MCBs.
f
f
Open the tap for one minute until the appliance and
its upstream cold water inlet line are free of air.
f
f
Switch the mains power back ON again.
5. Cleaning, care and maintenance
f
f
Never use abrasive or corrosive cleaning agents. A damp
cloth is sufficient for cleaning the appliance.
f
f
Check the taps regularly. Limescale deposits at the spouts
can be removed using commercially available descaling
agents.
6. Troubleshooting
Fault
Cause
Remedy
The appliance will
not start despite the
DHW valve being
fully open.
There is no voltage in the
appliance.
Check the fuses/MCBs in
your fuse box/distribution
panel.
The aerator in the tap or
the shower head is scaled
up or contaminated.
Clean and/or descale the
aerator or shower head.
The water supply has been
interrupted.
Vent the appliance and the
cold water inlet line (see
chapter "Settings / Follow-
ing an interruption to the
water supply").
Cold water flows
briefly while hot
water is being
drawn.
The air sensor detects air
in the water and the ap-
pliance's heating output is
briefly switched off.
The appliance restarts au-
tomatically after 1 minute.
The temperature at
the appliance cannot
be set to > 43 °C.
The Tmax childproofing is
enabled.
Disable the childproofing
(see chapter "Appliance
description")
The anti-scalding protec-
tion in the appliance is
enabled.
Your qualified contractor
can disable the anti-scald-
ing protection for you.
If you cannot remedy the fault, notify your qualified contractor.
To facilitate and speed up your enquiry, please provide the serial
number from the type plate (000000-0000-000000):
No.: 000000-0000-000000
DEL ... AU
26
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12
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