STIEBEL ELTRON DEM 3 - 12 Taking the Appliance out of Use; 13 Troubleshooting

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f Using the adjusting screw, set the required maximum flow
rate:
Lowest flow rate = turn the screw clockwise.
Highest flow rate = turn the screw anti-clockwise as far as it
will go.
f Fit the appliance cover.
12. Taking the appliance out of use
f Isolate the appliance from the power supply by means of
the fuse/MCB in your fuse box or by pulling the plug of the
power cable.
f Drain the appliance (see chapter “Maintenance”).
13. Troubleshooting
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fV¼ă¼®ź
The appliance will not
start in spite of a fully
open DHW valve.
The aerator in the tap is
scaled up or dirty.
Clean and/or descale the
aerator or replace the
special aerator.
The flow rate is set too
low.
Increase the flow rate.
The sieve in the cold
water line is blocked.
Clean the sieve after
shutting off the cold
water inlet line.
The heating system is
faulty.
Check the resistance of
the heating system, and
replace the appliance if
required.
The safety pressure
limiter has responded.
Remedy the cause of
the fault. Isolate the
appliance from the
power supply and
depressurise the water
line. Activate the safety
pressure limiter.
The required
temperature is not being
reached.
The appliance operates
at its output limit.
Reduce the flow rate.