Viessmann GC1 Operating Instructions For The System User

35
Cause Remedy
The heating system is off.
■
Turn on the ON/OFF switch (see page 32).
■
Switch ON the mains isolator if installed (outside the
boiler room).
■
Set the MCB in the power distribution board (main do-
mestic MCB).
Control unit incorrectly adjusted. DHW heating must be set.
Check the settings and correct if required:
■
Operating program (see page 15)
■
DHW temperature (see page 22)
No fuel. With oil or LPG:
Check the fuel reserves and re-order if required.
For operation with natural gas:
Open the gas shut-off valve. If necessary, check with
your gas supply utility.
"Fault" is displayed. Check what type of fault it is. Acknowledge the fault
(see page 28). If necessary, notify your contractor.
"Burner fault" is displayed.
■
Vitotronic 100, type CC1E:
Press the burner reset button.
See separate boiler or burner instructions.
■
Vitotronic 100, type CC1I:
Follow the instructions on the display (see page 29).
Contact your contractor if the burner still fails to start.
Danger
If faults are not rectified, they can have life
threatening consequences.
Do not acknowledge fault messages several
times in quick succession. Notify your contractor
if a fault recurs. Your contractor will be able to
analyse the cause and rectify the fault.
Single boiler constant control: DHW too hot
Cause Remedy
The control unit is set incorrectly. Check the DHW temperature and correct it if required
(see page 22).
The second set DHW temperature has been activated. No action required.
The "increased DHW hygiene" function has been acti-
vated by your heating contractor. This function im-
proves the microbiological quality of the water in the
DHW cylinder.
DHW is being heated by the solar thermal system. Check the settings at the solar control unit and correct
them if required.
Separate operating instructions
What to do if...
Single boiler constant control: No DHW
5798582

Viessmann GC1 Specifications

General

Brand	Viessmann
Model	GC1
Category	Control Unit
Language	English