Viessmann GC1 - There Is no Hot Water

45
Cause Remedy
The heating system is switched off. ■ Turn the ON/OFF switches (see chap-
ter "Controls") at all control units ON.
■ Switch ON the mains isolator, if instal-
led (outside the boiler room).
■ Check the fuse/MCB in the power dis-
tribution board (main domestic fuse/
MCB), and reset/replace if required.
Control unit or remote control incorrectly
adjusted.
Check settings and correct if required:
■ At every Vitotronic 100:
" " must be set (see page 19).
■ At the Vitotronic 300-K:
– DHW heating must be enabled (see
page 30).
– DHW temperature (see page 29).
– Time (see page 35).
– Time program (see page 30).
■ Check the settings at the remote con-
trol (if available).
Separate operating instructions
No fuel. See page 43.
"Fault" is displayed at the Vitotronic 300-
K, and the red fault indicator flashes (see
chapter "Controls").
Scan the type of fault, make a note of the
fault code and acknowledge the message
(see page 40).
If necessary, notify your heating contrac-
tor.
Symbol " " is displayed by the Vitotronic
100.
Scan the type of fault, make a note of the
fault code and acknowledge the message
(see page 40).
If necessary, notify your heating contrac-
tor.
Symbol " " is displayed by the Vitotronic
100, type HC1B.
Press "R" (see chapter "Controls").
Acknowledge the fault message with
OK.
Notify your heating contractor of the fault
code if the fault reoccurs.
What to do if...
There is no hot water
5592 675 GB