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D0000107122
u Push and pivot the appliance cover upwards and remove it.
9.3
Descaling the appliance
NOTICE: Never treat the cylinder surface with descaling agents
as these can damage the plastic.
u Open the appliance.
u Remove the flanged immersion heater.
u Carefully tap the heating element to remove coarse limes-
cale deposits.
u Immerse the heating element up to the flange plate in de-
scaling agent.
u Carry out descaling in accordance with the instructions
provided by the descaling agent manufacturer.
u After descaling, flush the heating element with clear water.
Reassemble the appliance.
9.4
Cleaning/replacing the strainer
D0000105873
u Detach the "cold water inlet" connection.
u Using pliers, remove the strainer from the "cold water inlet"
connection.
u Descale or replace the strainer.
9.5
Checking the earth conductor (DGUV V3)
u Pull off the temperature selector.
u Check the earth conductor (in Germany DGUV V3 for ex-
ample) across a limiting ring fixing screw and the earth
conductor contact of the connecting cable.
9.6
Replacing the connecting cable
NOTICE: The power cable must only be replaced by a qualified
contractor with an original spare part.
9.7
Positioning the temperature sensor in its
protective pipe
u When replacing the temperature controller, guide the tem-
perature sensor into its protective pipe.
u Secure the temperature sensor in place below the earthed
plug.
www.stiebel-eltron.com
Troubleshooting (users)
D0000105874
10 Troubleshooting (users)
Problem
Cause
The appliance does not
The temperature se-
supply hot water.
lector is rotated anti-
clockwise as far as it
will go.
No voltage at the ap-
pliance.
Water can only be
The aerator in the tap
drawn at a reduced
is scaled up.
rate.
Loud boiling noises in-
The appliance is scaled
side the appliance.
up.
Water drips from the
Frequent minimal
tap outlet during the
draw-off rates (< 0.4 l/
heat-up process.
min).
u If you cannot remedy the fault, contact your qualified con-
tractor.
u To facilitate and speed up your enquiry, please provide the
contractor with the number from the type plate
(000000-0000-000000).
11 Troubleshooting (installers)
Problem
Cause
The appliance does not
The high limit safety
supply hot water.
cut-out has tripped.
The strainer is soiled. Clean / replace the
Loud boiling noises in-
The appliance is scaled
side the appliance.
up.
The tap drips for a
The residual water is
while after it has been
not held in the tap
closed.
outlet.
The maximum flow
rate of the appliance
has been exceeded.
The tap drips when the
The tap is unsuitable. Replace the tap.
appliance is heating
The anti-drip function
up.
is faulty.
12 Shutting down the system
u Isolate the appliance from the power supply by removing
the plug or by tripping the MCB in the distribution board.
u Drain the appliance (see chapter "Maintenance (qualified
contractors) / Draining the appliance").
SNU 5 Plus | AU | GB | 1 kW |
185
Remedy
Switch the appliance
on by turning the tem-
perature selector.
Check the plug / fuses
in the distribution
board.
Descale / replace the
aerator.
Have the appliance de-
scaled by a qualified
contractor.
Change your draw-off
pattern (> 0.4 l/min).
Remedy
Remedy the cause of
the fault. If necessary,
replace the temperat-
ure controller. Allow
the appliance to cool
down. If you have isol-
ated the appliance
from the power sup-
ply, the high limit
safety cut-out will be
reset automatically.
strainer in the "cold
water inlet" connec-
tion.
Descale the appliance.
Replace the aerator in
the tap outlet, the tap
outlet or the tap.
Reduce the maximum
flow rate of the tap to
the maximum flow
rate of the appliance.
Replace the appliance.
17
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