Rooms Are Too Hot - Viessmann VITOTRONIC 300 Operating Instructions Manual

What to do if...
Rooms are too cold
Cause
"External hook-up" enabled.
"External program" enabled.

Rooms are too hot

Cause
Control unit incorrectly adjusted.
■
The remote control (if installed) is set incorrectly.
■
Separate operating instructions
"Fault" is displayed.
The mixer motor is faulty.
"External hook-up" enabled.
"External program" enabled.
44
(cont.)
Remedy
No action required.
The operating program set at the control unit was e.g.
changed over via an externally connected button.
Example: In a school, heating demand exists outside of
school times, e.g. for a parents' evening.
This function cannot be influenced via the control unit.
Once the external changeover no longer applies, the
set operating program becomes active again.
The operating program set at the control unit has been
changed by another control device.
You can change the operating program on the
Vitotronic control unit.
Remedy
Check the settings and correct if required:
Operating program (see page 17)
■
Room temperature (see page 22)
■
Time (see page 31)
■
Time program, central heating (see page 23)
■
Heating curve (see page 23)
■
Check what type of fault it is. Acknowledge the fault
(see page 38). If necessary, notify your contractor.
Notify your heating contractor.
No action required.
The operating program set at the control unit was e.g.
changed over via an externally connected button.
Example: In a school, heating demand exists outside of
school times, e.g. for a parents' evening.
This function cannot be influenced via the control unit.
Once the external changeover no longer applies, the
set operating program becomes active again.
The operating program set at the control unit has been
changed by another control device.
You can change the operating program on the
Vitotronic control unit.