Diagnosis - Viessmann VITODENS 200 Start-Up/Service Instructions

Troubleshooting

Diagnosis

Legend
A Display window
B Reset button
C Burner fault indicator
24
Comfortrol Menu driven programming unit Faults with
fault display on control unit
Faults with fault display on control unit
When a fault message is detected, –––– FAULT––––
flashes in the display of the programming unit with the
cover closed.
To trace the fault
1. Open cover:
  FAULT SEARCH "A". Fault code is displayed.
Note: The fault message is cleared when
"ACKNOWLEDGE" is selected.
If an acknowledged fault is not corrected by
24:00 hrs on the same day, the fault message
will reappear.
The acoustic alarm system (only with optional
expansion board installed), is not reactivated.
The meaning of the fault codes is explained in
the table starting on page 27.
2. Close the cover.
To reset the burner
If red light is on or flashing:
1. Press the "EU" button once to reset the burner.
Find nature of sensor fault in plain language
Note: Please refer to the diagnostics table starting on
page 27 for details on required action.
Open the cover:
Menu option Button
 MAIN MENU "D"
 SYSTEM "D"
 INSTALLER SETUP "C"
 CODE PLEASE: "B-C-C-B"
 DIAGNOSIS "A"
 SCAN SENSORS "B"
Select defective sensor with the menu option
CONTINUE "A".
Vitodens 200 WB2 Service