37
If sensors have failed, an emergency mode can be
enabled via the control unit. In emergency mode, the
primary pump runs permanently at the emergency
speed. In emergency mode, the required draw-off tem-
perature cannot be ensured.
Press the following keys:
1.
"Main menu"
is displayed.
2.
for
"DHW"
.
3.
OK
to confirm.
4.
OK
to confirm for
"
=
Emerg. mode act."
.
5.
for
"Yes"
.
6.
2 x OK to confirm.
Set the emergency speed so that the
required set DHW temperature is shown
under
"TDHW"
.
7.
for
"Emerg.spd"
.
8.
OK
to confirm.
Set the emergency speed.
9.
2 x OK to confirm.
Changing the rotational direction of the 3-way diverter valve
Installation position with rotational direction in its factory setting
Vitotrans 353
Fig.15
Troubleshooting
Enabling emergency mode
5517 095 GB
Diagnosis
Summary of Contents for VITOTRANS 353
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