Fault 142 means the burner is in a fault state due to communication restriction on CAN bus involving INR. The manual's first action is: “Check the fan unit for correct function. For this, check the stepper motor of the fan unit (reference run with mains ON). If the fault persists, check the plug-in connections and cables of the CAN bus. Check further CAN bus subscribers. If fault occurs repeatedly, replace fan unit.”
- Model
- Viessmann Vitodens 111-W
- Display shows
- Burner in a fault state (142)
- Type
- Fault code
- Source
- Manual p. 72
What 142 means
Burner in a fault state p. 72
Common causes
- Communication restriction on CAN bus. INR p. 72
What to do
- Check the fan unit for correct function. For this, check the stepper motor of the fan unit (reference run with mains ON). If the fault persists, check the plug-in connections and cables of the CAN bus. Check further CAN bus subscribers. If fault occurs repeatedly, replace fan unit. p. 72
If 142 is still not resolved
The manual gives no further instruction for this code. Open the code table in the PDF or contact Viessmann service.
This page summarises what the manufacturer’s manual says about 142; each statement links to the page it comes from, and quoted lines are copied word for word. It is not a substitute for the manual or for a qualified installer. ManualLib is not affiliated with Viessmann. Found a mistake? Report an error.