Viessmann Vitodens 200-W System, Operating Instructions For The System User

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Cause Remedy
■
Incorrect control unit settings.
■
The remote control (if installed) or the room tempera-
ture controller (if installed) is set incorrectly.
Operating instructions, for the remote control
unit or room temperature controller
Check the settings and correct if required:
■
Operating program: See page 16.
■
Room temperature/flow temperature: See page 25.
■
Time: See page 34.
■
Time program for central heating: See page 21.
■
Only for weather-compensated operation:
Heating curve: See page 26.
■
Only for weather-compensated or constant operation:
"Day(s) at home" is switched on: See page 27.
■
Only for weather-compensated or constant operation:
"Extended heating" is switched on: See page 26.
"Error message" is displayed. Check what type of fault it is. Make a note of the fault
message and acknowledge the fault: See page 42. If
necessary, notify your contractor.
"Screed drying" is switched on No action required.
After expiry of the screed drying time, the selected op-
erating program is switched on.
There is no hot water
Cause Remedy
The heat generator is switched off.
■
Turn on the ON/OFF switch: See page 47.
■
Switch ON the power supply to your system, e.g. at a
separate MCB/fuse or mains isolator.
■
Incorrect control unit settings.
■
The remote control (if installed) or the room tempera-
ture controller (if installed) is set incorrectly.
Operating instructions, for the remote control
unit or room temperature controller
DHW heating must be enabled.
Check the settings and correct if required:
■
Operating program: See page 16.
■
DHW temperature: See page 31.
■
Time: See page 34.
■
Time program for DHW heating: See page 24.
■
Only for weather-compensated or constant operation:
"Holiday" is switched on for all heating circuits: See
page 29.
No fuel. Open the gas shut-off valve. If necessary, check with
your gas supply utility.
"Error message" is displayed. Check what type of fault it is. Make a note of the fault
message and acknowledge the fault: See page 42. If
necessary, notify your contractor.
"Screed drying" is switched on. No action required.
After expiry of the screed drying time, the selected op-
erating program is switched on.
The DHW is too hot
Cause Remedy
Incorrect control unit settings. Check and correct the set DHW temperature if re-
quired: See page 31.
The hygiene function is switched on. Wait until the hygiene function has been completed.
DHW temperature for solar DHW heating is set too
high. Have your contractor change the setting.
What to do if...
Rooms are too hot
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