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FlowMax · technician tips

FlowMax service menus, test modes and resets

3 tips for combi boiler: access codes, button combinations, test modes and the resets you need at the appliance.

Jump to: Access & passwords (1) · Service & test modes (1) · Settings shortcuts (1)

Access & passwords

Installer and service menu codes, and how to get into them.

Enter the parameter menu (PL 0)

Combi boiler · FlowMax condensing combi (FLOWMAX-120)

Power-up button combination that opens parameter selection; the display shows PL and 0 when it is ready.

  1. Switch the ON/OFF switch to OFF.
  2. Switch it back ON while holding the + and - buttons.
  3. Release both buttons when PL and 0 appear.
  4. Hold S and press + to choose a parameter number, release S, then press S again to see its value.
  5. Change the value with + or -, press S to confirm, then switch the unit off and on to apply it.

Applies to: FLOWMAX-120 condensing combi

Source: FLOWMAX-120 Instruction Manual, 5.2 Setting the parameters, p.40. Written in our own words; check the manual for your exact model.

Service & test modes

Forced fan, low and high fire, test and diagnostic modes, error history and live data.

Start the flue test (chimney sweeper) function

Combi boiler · FlowMax condensing combi (FLOWMAX-120)

Runs the unit at maximum heating output without modulation for 15 minutes so you can take combustion readings.

  1. Hold the Service button for 7 seconds to start the function.
  2. Take the combustion readings within the 15 minutes.
  3. Press the unit OFF button to stop it early.

Applies to: FLOWMAX-120 condensing combi

Source: FLOWMAX-120 Instruction Manual, 6.11 Diagnostics - Function codes, p.67-68. Written in our own words; check the manual for your exact model.

Settings shortcuts

Where the useful parameters live and what they are set to from the factory.

Show fan frequency on the display (parameter 22)

Combi boiler · FlowMax condensing combi (FLOWMAX-120)

Setting parameter 22 to 01 makes the display show the fan frequency for 10 minutes while the unit runs.

  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.

Applies to: FLOWMAX-120 condensing combi

Source: FLOWMAX-120 Instruction Manual, 5.2 Setting the parameters - Parameter 22, p.46. Written in our own words; check the manual for your exact model.

Related

FlowMax error codes

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For licensed technicians. Installer menus, test modes and access codes change settings that affect safety; only use them if you are trained on the appliance and understand the result. Gas, electrical and refrigerant work must be done by a qualified, licensed person, and the manufacturer’s manual for the exact model and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.