The Dhw Is Too Hot; Fault Will Be Displayed; Service" Will Be Displayed - Viessmann Vitotronic 300 Series Operating Instructions Manual

Vitotronic 300, GW6B Operating

The DHW is Too Hot

Cause
The control unit is set incorrectly.
The DHW is being heated by the solar thermal system.
Emissions test switch is set to

Fault will be Displayed

Cause
Heating system fault.

"Service" will be Displayed

Cause
The time for a service, as specified by your heating
contractor, has arrived.
. (see page 40)
Remedy
Check and correct the DHW temperature, if required
(see page 30).
Check the settings at the solar control unit and correct
them if required.
Separate operating instructions
Close the flap.
Remedy
Proceed as described on page 38.
Remedy
Proceed as described on page 37.
Troubleshooting
43