Terminating Maintenance Mode And Activating Energy Manager; Tightness Test On Balanced Flue System (Annular Gap Check) - Viessmann Vitovalor PT2 Installation And Service Instructions For Contractors

Commissioning, inspection, maintenance

Terminating maintenance mode and activating energy manager

Note
The fuel cell module will only start operating again if
"Ecological", "Economical" or "Energy manager
OFF" has been selected at the programming unit.
Tap the following buttons:
1.
2. "Fuel cell"
3. for "Ecological", "Economical" or
"Energy manager OFF"
Note
For installation without an external electricity meter,
select operating mode "Energy manager OFF".
Terminating maintenance mode on the fuel cell module programming unit
1. Check that "Ecological", "Economical" or
"Energy manager OFF" is selected at the pro-
gramming unit.
If not, select one of the operating modes.
2. Use to select "17" on the fuel cell module pro-
gramming unit.

Tightness test on balanced flue system (annular gap check)

Fig. 69
A Combustion air aperture (ventilation air)
76
4. to confirm
5. Check that the "MNT" indicator on the fuel cell
module programming unit is OFF.
If the indicator is still illuminated, terminate mainte-
nance mode via the programming unit of the fuel
cell module: See the following chapter.
3. Press and hold SET for at least 3 s.
"OFF" will appear in STATE.
Maintenance mode has terminated if the "MNT"
indicator is no longer illuminated.
A