Viessmann Vitocal 200-G Series Installation And Service Instructions Manual page 67

Checking the system function
Carrying out a function check
The function test serves to check the proper function-
ing of the different system components.
Service menu:
1. Press OK + simultaneously and hold for
å
approx. 4 s.
2. "Service functions"
3. "Function check"
Resetting the instantaneous heating water heater
!
Please note
If the heat pump is exposed to temperatures
below 15 °C, e.g. during storage or transport,
–
the high limit safety cut-out of the instantaneous
heating water heater may respond.
Heat up the high limit safety cut-out to above
20 °C. Press the reset button of the high limit
safety cut-out: See Fig. 67.
Commissioning, inspection, maintenance
(cont.)
4. Start the required function, e.g. "DHW". Only those
functions are shown that correspond to the actual
system equipment level.
During the function check, the system overview is
displayed.
5. Terminate function with
"Vitotronic 200" service instructions
A
Fig. 48
Reset button
A
.
67