Viessmann Vitodens 111-W Error 540: Burner in a fault state

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

Fault code540

The burner is in a fault state because of condensate backup in the heat cell. The manual's first action is: “Check system for condensate backup. Check the condensate drain and trap. Replace insulation blocks, electrodes and burner gauze assembly if required.”

Model
Viessmann Vitodens 111-W
Display shows
Burner in a fault state (540)
Type
Fault code
Source
Manual p. 82

What 540 means

Burner in a fault state p. 82

Common causes

  • Condensate backup in the heat cell p. 82

What to do

  1. Check system for condensate backup. Check the condensate drain and trap. Replace insulation blocks, electrodes and burner gauze assembly if required. p. 82
  2. Reset the appliance. p. 82

If 540 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 82 All Vitodens 111-W error codes Manual details & download

This page summarises what the manufacturer’s manual says about 540; 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.