Viessmann Vitodens 111-W Error 103: Control mode

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

Fault code103

Fault 103 means control mode is not working due to an internal communication error with the programming unit. The manual's first action is: “Check cables and plug-in connections between heat management unit and HMI programming unit.”

Model
Viessmann Vitodens 111-W
Display shows
Control mode (103)
Type
Fault code
Source
Manual p. 72

What 103 means

Control mode p. 72

Common causes

  • Internal communication error, programming unit p. 72

What to do

  1. Check cables and plug-in connections between heat management unit and HMI programming unit. p. 72

If 103 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 103; 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.