Diagnosis And Service Scans; Diagnosis - Viessmann FB2A Installation And Service Instructions For Contractors

Diagnosis

Operating data can be scanned in the following areas:
■ General
■ Heating circuit 1
■ Heating circuit 2 (if heating circuit with mixer installed)
■ DHW
■ Solar
■ Brief scan (for further information, see page 81)
■ Reset data
Note
If a sensor that has been scanned is not connected, "- - -" appears on the display.
Calling up operating data
1. Press OK and
approx. 4 s.
2. "Diagnosis"
Resetting operating data
Saved operating data (e.g. hours run) can be reset to 0.
The value "Adjusted outside temp" is reset to the actual value.
1. Press OK and
approx. 4 s.
2. "Diagnosis"
Brief scan
In the brief scan, you can scan temperatures, software versions and connected com-
ponents, for example.
1. Press OK and
approx. 4 s.
2. "Diagnosis"
3. "Brief scan".
simultaneously for
simultaneously for
simultaneously for

Diagnosis and service scans

3. Select required group, e.g. "Gen-
eral".
3. "Reset data"
4. Press OK.
The display shows 8 lines with 6 fields
each.
81