There Is No Hot Water; The Dhw Is Too Hot - Viessmann VITODENS Operating Instructions Manual

There is no hot water

Cause
The heating system is switched OFF
ON indicator "8" (green) OFF
Control unit or remote control incor-
rectly adjusted
No fuel
Control unit fault: "Fault" is displayed
and the red fault indicator flashes

The DHW is too hot

Cause
Control unit incorrectly adjusted
Remedy
&
Switch system ON/OFF switch "8"
ON (see page 9)
&
Switch ON the main isolator, if
installed (outside the boiler room)
&
Reset circuit breaker inside the
power distribution board (main
domestic MCB).
Check settings and correct, if required:
& DHW heating must be switched ON
(see page 13 and 15)
& DHW temperature (see page 25)
& Time program (see page 26)
& Time (see page 31)
With oil/LPG:
Check the fuel stock and re-order, if re-
quired.
With natural gas:
Open the gas shut-off valve and check
with your gas supplier, if required.
Press burner fault reset "E".
Scan the type of fault (see page 35)
and notify your local heating contractor
Remedy
Check and, if required, correct DHW
temperature (see page 25)
What to do if...
39