Viessmann VITOCROSSAL 200 CM2 Service Instructions For Contractors page 40

Troubleshooting
Fault indicator
Fault display
The fault display is activated automatically if the burner
control unit switches to a fault state. The most recent
fault is then displayed. The fault LED is also illumina-
ted in the case of a non-lockout fault, or flashes
together with the fault code in the case of a lockout
fault.
Status Service
Fault memory
The 10 most recent faults are saved and can be called
up. The most recent fault code is shown first, followed
by the preceding codes. If no button is pressed within
20 s the fault memory display terminates automatically.
Note
If the burner repeatedly starts up due to a non-lockout fault without displaying a fault code, the fault memory may
give an indication of the cause.
To call up the fault codes, press the following buttons:
1. S longer than 2 s, " " flashes.
2. until "4" is shown under Service.
3. S "4" is displayed under Status.
4. / to scroll through the fault memory display.
Service Description
1 Fault codes display
2 Detailed fault codes
3 Clear fault memory.
5. S the selected fault memory display is shown
under Status.
Fault codes
General process errors
Fault is displayed on the display and programming unit on the burner.
Note
Carry out measures in the order described.
All fault codes are saved to the fault memory and the last 10 can be called up.
40
Fault code of the most
A
recent fault (see table
from page 40)
1. Remedy the fault. For fault codes and measures,
see from page 40. Carry out measures in the
indicated order.
2. Hold down reset button R for longer than 0.5 s.
The operating display appears again. The burner
control unit is reset.
6. / to scroll through the fault codes.
To clear the fault memory from the operating display,
press the following buttons:
1. S longer than 2 s, " " flashes.
2. until "4" is shown under Service.
3. S "4" is displayed under Status.
4. until "3" is shown under Service.
5. S "1" is shown under Status and "dEL" under Serv-
ice.
6. S to confirm the deletion. If deleted successfully,
"1" is shown under Service; if it failed, "0" is
shown.
7. S to change to the operating display.