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FlowMax · Combi boiler

22 Fan frequency readout (parameter 22)

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

What the display is showing

When parameter 22 is set to 01, the display shows the fan frequency while the unit is running, for 10 minutes. It is a diagnostic readout, not the E22 programming-request fault.

Applies to: FLOWMAX-120 condensing combi

What to do

  1. Enter the parameter menu (PL 0).
  2. Select parameter 22 and set it to 01 (00 = off).
  3. Confirm with S, then switch the unit off and on.
  4. While the unit runs, the display shows the fan frequency for 10 minutes.

Settings for these units

Other codes on the same units

  • 07 Flue test (chimney sweeper) function active
  • 08 Frost protection active
  • 28 Legionella prevention cycle active
  • Curve number Compensation curve number display
  • OFF Switched off, frost protection still active
  • PL 0 Parameter menu entered

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Source: FLOWMAX-120 Instruction Manual, 5.2 Setting the parameters - Parameter 22, p.46. 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.