Viessmann Vitoladens 300-W Service Instructions For Contractors page 61

Fault display
Fault display layout
A
2
3
1
0 0
4
A Fault display
B Fault symbol
The red fault indicator flashes for every
fault.
A fault in the burner control unit causes
the display to show "E".
The display flashes "Fault" if a fault mes-
sage is issued
Fault
Mo 57
Plain text fault displays:
■ Burner control unit
■ Outside temperature sensor
Checking and acknowledging faults
Note
If an acknowledged fault is not removed,
the fault message will be re-displayed
the following day at 07:00 h.
B
Outside temp.
sensor
1
RESET
°C
C D
10
+
+
OK
­
C Fault number
D Fault code
■ Flow sensor
■ Boiler sensor
■ Mixed flow sensor
■ Cylinder sensor
■ Flue gas sensor
■ DHW outlet sensor
■ Room temperature sensor
■ Collector sensor
■ Solar DHW sensor
■ Remote control
■ Subscriber fault
Press the following keys:
1. c for the current fault.
2. a/b for further fault messages.
Troubleshooting
61