There Is No Hot Water; The Dhw Is Too Hot - Viessmann VITODENS 200-W B2HE 85 Operating Instructions Manual

What to do if...

There is No Hot Water

Cause
The boiler is switched off.
Incorrect control unit settings.
The remote control (if used) or room temperature
controller (if used) is set incorrectly.
Operating instructions for the remote control or
room temperature controller
No fuel.
"Fault" is displayed.

The DHW is Too Hot

Cause
Incorrect control unit settings.
The hygiene function is switched on.
DHW temperature for solar DHW heating is set too high.
"Fault" is Displayed
Cause
System fault
and "Service" are Displayed
Cause
The time for a service as specified by your contractor
has arrived.
"Panel Locked" is Displayed
Cause
The control panel is locked.
"External Hook-up" is Displayed
Cause
The set operating program was changed over by
an external device, e.g. an EM-EA1 extension (DIO
electronics module): See page 14.
38
Remedy
Turn on the ON/OFF switch: See page 36.
Switch on the power supply to your system,
e.g. at the circuit breaker
DHW heating must be enabled.
Check the settings and correct if necessary:
Operating program: See page 14.
Room temperature/supply temperature: See page 20.
Time: See page 28.
Time program for central heating: See page 18.
The vacation program is switched on: See page 23.
Open the gas shut-off valve. If necessary, check with
your gas supply utility.
Check what type of fault it is. Make a note of the fault
message and acknowledge the fault: See page 33.
If necessary, notify your contractor.
Remedy
Check and correct the set DHW temperature if necessary:
See page 22.
Wait until the hygiene function has been completed.
Have your contractor change the setting.
Remedy
Proceed as described on page 33.
Remedy
Proceed as described on page 33.
Remedy
Unlock it: See page 26.
Remedy
No action required.
Once the external changeover no longer applies, the set
operating program is switched on again.
Vitodens 200-W B2HE Operating