Viessmann Vitoligno 300-C Installation And Service Instructions Manual page 100

Diagnosis and service checks
Checking the outputs (actuators)
"Heating circuit 2"
■
■ "Heating circuit 3"
■ "Heating circuit 4"
The following actuators can be switched "manually"
Depending on boiler size and settings, other actuators
may be available.
"General"
■ "Central fault Open"
■ "Output On"
"Boiler"
"Flue gas fan On"
■
"Ignition On"
■
"Prim air damper Open"
■
■ "Prim air damper Close"
■ "Sec air damper Open"
■ "Sec air damper Close"
■ "Boiler pump On"
"Boiler valve Open"
■
"Boiler valve Close"
■
■ "Ash removal On"
■ "Grate On"
■ "Grate Rev" (reverse the rotational direction)
■ "Cleaning On"
Note
After replacing a mixer motor: Check the rotational
direction!
"Charging"
■ "Feed screw conveyor On"
"Screw conveyor On"
■
"Vacuum module On "
■
"Discharge On"
■
■ "Changeover unit RR On" (clockwise)
■ "Changeover unit LR Rev" (anti-clockwise)
■ "Ext. charging On"
Calling up the "Actuator test" menu
The actuator test can only be carried out when the
boiler is "turned off" (START/STOP button is not illumi-
nated).
Outputs (actuators) can be switched in the "Service"
menu under "Actuator test".
Note
Each term on the display is followed by the action of
the corresponding actuator, which will be carried out. If
not action or the wrong action appears, check the cor-
responding electrical connection.
Automatic overfill protection is disabled during the
actuator tests.
100
(cont.)
"DHW"
■
■ "DHW circulation"
■ "Solar"
"Additional boiler"
■ "Additional boiler On"
"Heating circuit 1"
■ "Pump On"
■ "Valve Open"
■ "Valve Close"
"Heating circuit 2"
"Pump On"
■
"Valve Open"
■
■ "Valve Close"
"Heating circuit 3"
■ "Pump On"
"Valve Open"
■
"Valve Close"
■
"Heating circuit 4"
■ "Pump On"
■ "Valve Open"
"Valve Close"
■
"DHW"
■ "Pump On"
■ "Valve Open"
■ "Valve Close"
"DHW circulation" (on the boiler, HKK PCB)
"Pump On"
■
"Solar" (on the boiler, HKK PCB)
■ "Pump On"
■ "Valve Open"
■ "Valve Close"
1. +
d
å
2. /
| ~
3.
d
4. /
| ~
5.
d
6. /
| ~
simultaneously for approx. 4 seconds.
The "Service" menu appears.
for "Actuator test".
to confirm.
for the required group of outputs (actua-
tors).
to confirm.
for the required output (actuator).