Viessmann Vitoligno 300-P Service Instructions For Contractors page 76

Troubleshooting
Fault display
The display signals faults with "Fault" and by flashing the red fault indicator.
A central fault messaging facility connected to plug gÖ will be switched ON.
Checking and acknowledging faults
Note
If an acknowledged fault is not removed,
the fault message will be redisplayed the
following day at 07:00 h.
Press the following keys:
1. d for troubleshooting.
Calling up acknowledged fault messages
Press the following keys:
1. "MENU".
2. |/~ for "Fault messages".
Fault displays in plain text
The following faults are displayed as plain text. The meaning of the fault and the fault
code shown to the right are given in the table on page 78.
■ "Outside sensor"
■ "Sensor 2 M1"
■ "Sensor 2 M2"
■ "Boiler sensor"
■ "Flame sensor"
■ "Lambda probe"
■ "Cylinder sensor"
■ "Buffer sensor"
■ "Collector sensor"
■ "Solar DHW sensor"
■ "Solar control unit"
■ "Programming unit"
■ "Remote control"
76
2. |/~ to display further fault mes-
sages, if several faults exist.
3. d to "Acknowledge" all fault
messages.
4. |/~ for "Yes" or "No".
5. d to confirm.
3. d to confirm.
4. |/~ for the list of current faults.
■ "Room temp.sensor"
■ "Communication"
■ "Coding card"
■ "User fault"
■ "Door open"
■ "HSC tripped"
■ "Not ignited"
■ "No fuel"
■ "Safety chain"
■ "Flue gas fan"
■ "Supply system"
■ "Grate cleaning"
■ "Prim. air damper"