Fault, What To Do; Faults That The Customer Can Troubleshoot Himself; Faults That The Customer Service Specialist Should Troubleshoot; Faults That Are Automatically Remedied - Bosch TR8500 21/24 DESOAB Operating Instructions Manual

12 A fault, what to do?
WARNING:
Attention!
Repairs must only be carried out by an authorised technician. Improper
repairs can lead to risk of serious injury to the user.
12.1

Faults that the customer can troubleshoot himself

Fault
Water flow-rate is too low.
A high water temperature is set,
but it is not reached.
The display is blank.
The water is not warm.
The temperature of the water leaving
the tap is higher than the set
temperature.
Lights up in the display.
If the fault could not be eliminated, please call customer service.
12.2

Faults that the customer service specialist should troubleshoot

Fault
Water flow-rate is too low despite
cleaning of filter using the water tap
or showerhead.
The display is blank despite fault-free
function of the mains electricity supply
fuses.
The display shows the error code "E..". There is a fault in the appliance.
12.3

Faults that are automatically remedied

Fault
The display shows "00,0°C".
13

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Cause
The filter in either the water tap or the showerhead
is clogged.
The continuous-flow heater is connected to
a thermostatically-controlled water tap.
The fuse in the fusebox has tripped/blown.
The supply temperature has reduced.
The temperature of the
the continuous-flow heater is higher than the set
temperature (e. g. due to pre-warmed water supplied
from a solar water heater).
The power limit has been reached.
Cause
A filter in the appliance is clogged.
There is a fault in the appliance.
Cause
The air sensor in the appliance detects air in the water
and momentarily switches the heating element off.
If your appliance does not operate as required, it is often due to a very
minor problem. Please check whether you can remedy the fault yourself
by using the following guidelines. You will save yourself the costs of an
unnecessary visit by customer service personnel.
Solution
Remove the filter and either clean it or descale it.
Set the temperature on the continuous-flow heater
to "60 °C".
Check the fuse in the fusebox.
Reduce the water flow on the taps until the desired
water temperature is reached.
water supplying The thermostatic premixer in the domestic supply
must be set accordingly to lower temperatures.
Reduce the water flow at the tap or lower
the temperature setting on the appliance.
Solution
Get a servicing expert to clean the appliance.
Get a servicing expert to check the appliance.
Get a servicing expert to check the appliance.
Solution
After a few seconds, the continuous-flow heater
automatically goes back into operation.
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A fault, what to do?
13