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Note
For further causes, see the boiler oper-
ating instructions.
Î
flashes in the display
Cause Remedy
The batteries are spent. Change the batteries (see next chapter).
The Vitotrol 100 has a power reserve of
3 min. If you replace the batteries within
this time, all set details will be retained.
After the power reserve has been excee-
ded, carry out a reset (see next chap-
ter).
Note
If the batteries are not changed, the dis-
play switches off.
Central heating and DHW heating are
carried out according to the settings on
the boiler control unit.
Changing the batteries
Disposal
Batteries/rechargeable batteries should
not be disposed of in domestic waste.
Always dispose of spent batteries/
rechargeable batteries via an authorised
collection site.
Use only alkaline batteries, 1.5 V
Mignon alkaline cells, type LR6/AA
that do not contain noxious substan-
ces.
Never use rechargeable batteries.
Replace both batteries every 18
months.
What to do if...
There is no hot water
(cont.)
5592 620 GB
27


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viessmann-vitotrol-100---utdb-rf2

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  • Thermostat won’t drop below 18 have tried reset but no change Submitted on 24-10-2022 at 12:52

    Reply Report abuse
  • I am trying to change the on / off time settings for the heating but it won't save the changes Submitted on 6-12-2021 at 15:39

    Reply Report abuse
  • how can i alter the control to stop the heating system working every time i put the boiler on? i only switch it on for hot water to save money, but the radiators come on too? i seem not to be able to alter the manual setting....
    any advice would be very appreciated.
    thank you Submitted on 19-8-2021 at 18:43

    Reply Report abuse
    • Hi, Having the same problem with the stat resetting at random times and the heating coming on. New batteries have been installed. Answered on 1-9-2022 at 14:45

      Vote up Report abuse
  • heating control set for prog 1 batteries strong time set correc t heating does not come on at correct times Submitted on 23-10-2018 at 21:37

    Reply Report abuse


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