Viessmann VITOTRANS 353, Installation And Service Instructions Manual

Page: 29 / 52

29
Status messages can be called up for the following
areas, subject to the system equipment level:
■ Actual/balance values
■ Cascade
■ DHW
■ DHW circulation
■ Pasteurisation
■ Return stratification
■ Fault relay
■ Messages
■ Service
Press the following keys:
1. OK to confirm for "Status"
2. to call up the required value.
3. OK to confirm.
4. to display further messages (see table below).
"Status" Explanation
"Cascade" Different status information about the cascade is displayed, depending on the
system configuration.
"Act. / balance val." For calling up temperatures and operating conditions, see page 29.
"DHW"
DHW avail. DHW heating status
TDHW set modulat. Only shown if this function is set.
T DHW set DHW temperature
"DHW circ."
DHW circulation Shows whether DHW circulation is enabled or disabled.
"Pasteurisatn"
Pasteurisation Shows whether pasteurisation is enabled or disabled.
Pasteu. dur. Duration of active pasteurisation
"RT stratif."
RT stratification Shows whether return stratification is enabled or disabled.
"Fault relay"
Fault relay Shows whether the potential-free fault relay is enabled or disabled.
"Messages" The display of status, fault and warning messages depends on the system
equipment level; see also page 31.
"Service"
S1 to S8 Displays the temperature captured at the sensor shown.
VFS T Displays the temperature captured at the combined temperature/flow sensor.
VFS dV Displays the flow rate captured.
PWM1/PWM2 Displays which circulation pump is controlled with the PWM signal shown.
R1 to R3 Displays what is switched with the relay shown.
R_pot.free Displays what is connected to the potential-free relay.
Scanning temperatures and operating conditions
Press the following keys:
1. OK to confirm for "Status" .
2. OK to confirm for "Act. / balance val." .
3. / Subject to system configuration, values from
the following table can be scanned.
Service settings and scans
Calling up status messages
5517 095 GB
Diagnosis