Display Codes - Bosch Worcester Greenstar 24 User Instructions

Operation
5.8

DISPLAY CODES

Display
code
20
Description
Inspection due
Button lock active
Trap filling function active
Air purge function active
Excessively rapid increase in CH flow
temperature (temp. gradient monitoring).
Heating mode is disabled for two minutes.
Not applicable in the UK.
Not applicable in the UK
6 720 801 019 (2012/05)