Faults; Fault Display; Fault Memory - Viessmann Vitocrossal 200 CM2 400 Service Instructions Manual

Troubleshooting

Faults

Fault display

The fault display is activated automatically if the burner
control unit switches to a fault state. The most recent
fault will then be displayed. The fault LED is also
illuminated in case of a non-lockout shutdown or flashes
together with the fault code in case of a lockout shutdown.
A Fault code of the most recent fault (see table from
page 55)
1. Correct the fault. For fault codes and measures, see
from page 55. Carry out measures in the indicated order.
2. Press reset button R for longer than 0.5 seconds
The operating display is shown again and the burner
control unit is reset.
54
Vitocrossal 200, CM2 400, 500, 620 and 620 TX Service

Fault memory

The ten most recent faults are saved and may be called up.
The order of scans ranges from the most recent to the
earlier fault codes. The fault memory display is terminated
automatically if no key is pressed within 20 seconds.
Note: If the burner does not start up due to a non-lockout
fault without displaying a fault code, the fault
memory may be able to indicate the cause.
To call up the fault codes, press the following keys:
1. S longer than 2 seconds " " flashes.
2. until "4" is shown under Service.
Y
3. S "4" will be displayed under Status.
4. to scroll through the fault memory display.
Y / B
Service
1
2
3
5. S the selected fault memory display will appear
under Status.
6. to scroll through the fault codes.
Y / B
To clear the fault memory from the operating display,
press the following keys:
1. S longer than 2 seconds " " flashes.
2. until "4" is shown under Service.
Y
3. S "4" will be displayed under Status.
4. until "3" is shown under Service.
Y
5. S "1" is shown under Status and "dEL"under Service.
6. S to confirm the deletion. If deleted successfully,
"1" will be shown under Service, "0" if it failed.
7. S to change to the operating display.
Description
Display fault codes
Detail fault codes
Clear fault memory