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Installation – for qualied contractors
12. Troubleshooting
Fault Cause » Remedy
Flow rate too low. Sieve, perlator
contaminated.
Clean the sieve, perlator.
Motorised valve
faulty.
Check the motorised valve.
Replace it, if required.
Continuous fault
display on the user
interface.
Sensor / PCB
faulty.
Investigate the fault further
in the customer service
mode.
See chapter "Appliance
description / Customer
service mode".
Faulty
communication
between the user
interface and the
control unit.
Check the user interface
and its connecting cable.
Backlighting in
the user interface
completely OFF.
No power supply. Check the fuse / MCB in
your fuse box/distribution
panel.
Loose connecting
cable to the
user interface.
Reconnect the cable.
Safety pressure
limiter has
responded.
Remove the cause.
Flush the heating
system to prevent it from
overheating.
Activate the safety
pressure switch at flow
pressure by pressing the
reset button.
Faulty PCB. Check the PCB and
replace it, if required.
Heater does not
switch ON / no hot
water.
Heating system
faulty.
Check the heater and
replace it, if required.
Flow detector faulty
or not plugged in.
Check the connection.
Check the flow meter in the
customer service mode.
The high limit
safety cut-out has
responded or its
cable is broken.
Remove the cause.
Activate the high limit
safety cut-out; replace it, if
required.
Fault message is
only shown when
hot water is drawn.
One phase has
dropped out.
Check the fuse / MCB in
your fuse box/distribution
panel.
Supply temperature
> 45 °C.
See chapter "Water
installation"; limit supply
temperature if necessary.
Cold water flows
briefly.
Wellness function
enabled.
Disable the Wellness
function.
Brief flow rate
collapse.
The appliance restarts
automatically when an
adequate flow rate has
been detected.
Air recognition
responds (cold
water for approx.
1 min).
The appliance restarts
automatically after a delay.
13. Specication
13.1 Wiring diagram
3/PE ~ 380 - 415 V
85_02_02_0005
1 Heaters
2 High limit safety cut-out
3 Safety pressure limiter
13.2 Dimensions
395
100
485
325
45
5
93
226
190
50
112
190
35
c01
c06
b02
D0000017757
b02 Entry electrical cables 1
c01 Cold water inlet Male thread G 1/2 A
c06 DHW outlet Male thread G 1/2 A
37


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