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Daikin · technician tips

Daikin service menus, test modes and resets

4 tips for furnace: access codes, button combinations, test modes and the resets you need at the appliance.

Jump to: Service & test modes (1) · Reset & cancel (2) · Settings shortcuts (1)

Service & test modes

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

Run the R-32 leak function test (A2u)

Furnace · Daikin DR96TN/DD96TN

Simulates an R-32 leak so you can check the furnace response; it only works when no alarm or fault is active.

  1. Press the left or right switch until A2u shows
  2. Press the center switch, choose yes with the left or right switch
  3. Press the center switch to confirm and start the test
  4. Select no in the same menu to stop it early

Applies to: Daikin DR96TN/DD96TN two-stage furnaces

Source: Daikin DR96TN-DD96TN service RSD6612304 (05-2024), R-32 Information - A2L Verification p.10. Written in our own words; check the manual for your exact model.

Reset & cancel

Clearing lockouts, service reminders and fault history; skipping purge or de-air programs.

Reset the furnace control to factory defaults (rFd)

Furnace · Daikin DR96TN/DD96TN

The rFd menu item returns the control menu settings to factory defaults.

  1. Press the left or right switch until rFd shows
  2. Press the center switch, pick yes or no with the left or right switch
  3. Press the center switch to confirm

Applies to: Daikin DR96TN/DD96TN two-stage furnaces

Source: Daikin DR96TN-DD96TN service RSD6612304 (05-2024), LED Display Menu p.26 and troubleshooting chart p.28. Written in our own words; check the manual for your exact model.

View and clear the stored faults (L6F / F10)

Furnace · Daikin DR96TN/DD96TN

The stored fault list is labelled L6F in the troubleshooting chart and F10 (last 10 faults) in the menu table; the center switch steps through it and clears it.

  1. Press the left or right switch until L6F shows
  2. Press the center switch and read the stored faults
  3. To erase them, keep the center switch pressed for 5 to 30 seconds; the display blinks three dashes three times, then shows L6F again

Applies to: Daikin DR96TN/DD96TN two-stage furnaces

Source: Daikin DR96TN-DD96TN service RSD6612304 (05-2024), LED Display Menu p.26 and troubleshooting chart p.28. 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.

Turn off R-32 monitoring when no R-32 system is fitted (A2E)

Furnace · Daikin DR96TN/DD96TN

If the furnace has no R-32 coil and sensor, A2E must be set to no; otherwise the furnace drops into fan-only mitigation.

  1. Press the left or right switch to scroll to the A2E menu item.
  2. Press the center switch to open it.
  3. Choose no and press the center switch to save.

Applies to: Daikin DR96TN and DD96TN two-stage 96% furnaces

Source: Daikin RSD6612304 (DR96TN/DD96TN service), menu table p.26; R-32 Information p.10; speed selection p.8-9. Written in our own words; check the manual for your exact model.

Related

Daikin 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.