There Is No Hot Water; The Dhw Is Too Hot; Ã" Flashes And "Fault" Is Displayed; Ë" Flashes And "Service" Is Displayed - Viessmann VITOTROL 300 RF Operating Instructions Manual

What to do if...

There is no hot water

Cause
Remote control set incorrectly.
No fuel.
"Fault" is displayed.

The DHW is too hot

Cause
The remote control is incorrectly adjus-
ted.
"ã" flashes and "Fault" is displayed
Cause
Heating system fault.
"ë" flashes and "Service" is displayed
Cause
The time for a service, as specified by
your heating contractor, has arrived.
40
Remedy
Check settings and correct if required:
■ "Heating and DHW" (with central
heating)
or
"Only DHW" (summer mode, no
central heating)
must be set (see page 26).
■ Set DHW temperature (see page 26).
■ Time program (see page 27)
■ Time (see page 32).
With oil/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.
Scan and acknowledge the type of fault
(see page 37). If necessary, notify your
heating contractor.
Remedy
Check the set DHW temperature and cor-
rect if required (see page 26).
Remedy
Proceed as described on page 37.
Remedy
Proceed as described on page 36.