The Dhw Is Too Hot; Ã " Flashes On The Display; E " Flashes On The Display; Ë " Flashes On The Display - Viessmann VITODENS Operating Instructions Manual

There is no hot water
Cause
No fuel.
Symbol " " is displayed.
Symbol " " is displayed.

The DHW is too hot

Cause
The control unit is incorrectly adjusted.
" " flashes on the display
ã
Cause
Heating system fault
" " flashes on the display
E
Cause
Heating system fault
" " flashes on the display
ë
Cause
The time for a service, as specified by your heating
contractor, has arrived.

"- - EP - -" flashes on the display

Cause
The operating program set at the control unit was
switched by an external device.
(cont.)
Remedy
With LPG:
Check the fuel reserves and re-order if required.
With natural gas:
Open the gas shut-off valve. If necessary, check with
your gas supply utility.
Press "R" (see page 9).
Acknowledge the fault message with OK (see page 16).
Notify your heating contractor of the fault code if the
fault recurs.
Notify your heating contractor of the fault code.
Acknowledge the fault message with OK (see page 16).
Remedy
Check and correct the DHW temperature if required
(see page 12).
Remedy
Notify your heating contractor of the fault code.
Acknowledge the fault message with OK (see page 16).
Remedy
Press "R" (see page 9).
Acknowledge the fault message with OK (see page 16).
Notify your heating contractor of the fault code if the
fault recurs.
Remedy
Notify your heating contractor and acknowledge the
service message with OK (see page 16).
Remedy
If required, you can switch operating programs.
What to do if...
21