Opening The Appliance; Descaling The Appliance; Checking The Earth Conductor (Dguv V3); Replacing The Connecting Cable - STIEBEL ELTRON SNU 10 Plus Manual

Troubleshooting (users)

u Undo the fittings on the water connections.
u Remove the appliance from the wall mounting bracket.
u Allow the appliance to drain into a sink with the water con-
nections pointing downwards.
u Lightly shake the appliance to aid draining.
9.2

Opening the appliance

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u Turn the temperature selector anti-clockwise as far as it will
go.
u Pull off the temperature selector.
u Remove the two screws behind the temperature selector.
u Pull off the limiting ring.
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u Insert a small screwdriver into the openings at the bottom
and carefully lift the appliance cover slightly.
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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

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.
9.5

Replacing the connecting cable

NOTICE: The connecting cable must only be replaced with an
original spare part by a qualified contractor.
16 | SNU 10 Plus
9.6 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.
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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.
u If you cannot remedy the fault, contact a qualified con-
tractor.
u To facilitate and speed up your enquiry, please provide the
qualified contractor with the number from the type plate.
11 Troubleshooting (qualified con-
tractors)
Problem Cause
The appliance does not The high limit safety
supply hot water. cut-out has tripped.
Loud boiling noises in- The appliance is scaled
side the appliance. up.

12 Shutting down the system

u Isolate the appliance from the power supply by removing
the plug or by switching off the MCB in the distribution
board.
u Drain the appliance (see chapter Draining the appliance
[} 15] ).
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.
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.
Descale the appliance.
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