Rooms Are Too Cold; Rooms Are Too Hot - Viessmann VITODENS 100-W B1HE Operating Instructions Manual

Vitodens 100-W B1HE/B1KE Operating

Rooms are too Cold

Cause
The boiler is switched off.
Incorrect control unit settings.
The DHW tank is being heated.
No fuel.
"Burner fault" is displayed.
"Error message" is displayed.

Rooms are too Hot

Cause
Incorrect control unit settings.
"Error message" is displayed.
Remedy
Turn on the ON/OFF switch: See page 28.
Switch on the power supply to your system,
e.g. at a separate MCB/fuse or mains isolator.
Central heating must be enabled.
Check the settings and correct if necessary:
Operating program: See page 16.
Supply temperature
Time: See page 19.
Wait until the DHW tank has been heated up.
Reduce the DHW draw-off rate or temporarily reduce
the set DHW temperature as required.
Open the gas shut-off valve. If necessary, check with
your gas supply utility.
Reset the burner: See page 25.
WARNING
If faults are not rectified, they may have life threatening
consequences.
Do not reset the burner several times in quick succession.
Immediately notify your contractor if a burner fault occurs.
Your contractor will be able to analyze the cause and
rectify the fault.
Check what type of fault it is. Make a note of the fault
message and acknowledge the fault: See page 25.
If necessary, notify your contractor.
Remedy
Check the settings and correct if necessary:
Operating program: See page 16.
Supply temperature
Time: See page 19.
Check what type of fault it is. Make a note of the fault
message and acknowledge the fault: See page 25.
If necessary, notify your contractor.
What to do if...
29