Viessmann Vitodens 111-W Error 104: Depending on configuration of EM-EA1 extension (DIO electronics module)

Viessmann Vitodens 111-W water heater · taken from the manufacturer’s manual, pages cited

Fault code104

Fault 104 indicates a problem with the EM-EA1 extension (DIO electronics module) because an external fault message input is active. The manual's first action is: “Check connected external device.”

Model
Viessmann Vitodens 111-W
Display shows
104
Type
Fault code
Source
Manual p. 72

What 104 means

Depending on configuration of EM-EA1 extension (DIO electronics module) p. 72

Common causes

  • External fault message input active p. 72

What to do

  1. Check connected external device. p. 72

If 104 is still not resolved

The manual gives no further instruction for this code. Open the code table in the PDF or contact Viessmann service.

Open the manual at page 72 All Vitodens 111-W error codes Manual details & download

This page summarises what the manufacturer’s manual says about 104; 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.