28
Display
Description
Factory setting
Setting range
"All relays..."
Switch all relays.
"Auto"
■
"Auto"
■
"OFF"
"Contr."
"HE1 (PWM1)"
Switch primary pump.
"Auto"
■
"Auto"
■
"OFF"
■
"ON"
"HE2 (PWM2)"
Switch secondary pump (DHW circulation
pump).
"Auto"
■
"Auto"
■
"OFF"
■
"ON"
"Cascade relay"
Switch cascade relay (R1).
"Auto"
■
"Auto"
■
"OFF"
■
"ON"
"Relay 2"
Switch individual relay.
"Auto"
■
"Auto"
■
"OFF"
■
"ON"
"Relay 3"
"Relay 4"
Balancing sensors
To compensate for systematic measuring errors, a cor-
rection value (offset) can be set for all connected tem-
perature sensors.
The correction value can be positive or negative. The
correction value is added to the current temperature
reading.
Setting range: +/
–
15 K
Press the following keys:
1.
for
"Inp/outputs"
.
2.
OK
to confirm
3.
OK
for
"Inputs"
.
4.
for the relevant sensor
5.
2 x OK opens the offset setting.
6.
/
for the required offset value
7.
2 x OK to confirm
Central fault message ("Fault relay")
If the
"Fault relay"
function is enabled and a fault
occurs at the control unit, the control unit will switch a
potential-free relay (R4).
Note on cascade:
The
"Fault relay"
is only enabled at the master control
unit. All faults that occur at the slave control units are
transferred to the master control unit via the VBus. In
the case of such faults or its own faults, the master
control unit switches its fault relay.
Display
Description
Factory setting
Setting range
"Fault relay"
Enables the function
"No"
(disabled)
■
"No"
(disabled)
■
"Yes"
(enabled)
"Inverted"
Inverts the relay function:
The relay is always on. The relay is switch-
ed off if a fault occurs.
"Yes"
(enabled)
■
"Yes"
(enabled)
■
"No"
(disabled)
Service settings and scans
Carrying out an actuator test (testing…
(cont.)
5517 095 GB
Diagnosis
Summary of Contents for VITOTRANS 353
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