FlowMax · Combi boiler

Curve number Compensation curve number display

Menu / mode display FlowMax condensing combi (FLOWMAX-120)

What the display is showing

When only an outdoor sensor is installed, with no remote control, turning the heating temperature knob shows the number of the weather compensation curve being selected. This is a setting readout, not a fault.

Applies to: FLOWMAX-120 with outdoor sensor only

What to do

Turn the central heating knob.
The selected curve number shows on the display.

Settings for these units

Installation clearances · FlowMax condensing combi (FLOWMAX-90/120)
Hot water scald risk by temperature · FlowMax condensing combi (FLOWMAX-90/120)

Other codes on the same units

07 Flue test (chimney sweeper) function active
08 Frost protection active
22 Fan frequency readout (parameter 22)
28 Legionella prevention cycle active
OFF Switched off, frost protection still active
PL 0 Parameter menu entered

Save it for the next call

Star this code in the HVACopedia app and keep the whole library on your phone for jobs with no signal.

Open the app

Source: FLOWMAX-120 Instruction Manual, Regulating the flow temperature by outdoor temperature, p.64. Summarized in our own words; check the original manual for your model.

For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.