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Fujitsu · technician tips

Fujitsu service menus, test modes and resets

5 tips for heat pump: access codes, button combinations, test modes and the resets you need at the appliance.

Jump to: Access & passwords (1) · Button combinations (1) · Service & test modes (2) · Settings shortcuts (1)

Access & passwords

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

Enter the indoor function setting mode (wireless remote)

Heat pump · Fujitsu wall-mounted 7-15 (NA ASU/AOU type)

Opens the function settings on the wireless remote; set function 95 before the temperature corrections (30, 31, 92, 93), because changing 95 resets them to 0.

  1. Hold POWERFUL + SET TEMP and press RESET on the remote.
  2. Set function 95 before the temperature corrections (30, 31, 92, 93).
  3. Power the unit off and on after setting.

Applies to: Fujitsu wall-mounted indoor units, 7/9/12/15 sizes (NA)

Source: Fujitsu Wall-mounted 7-9-12-15 (North American trilingual, UTY-RNNUM remotes; e.g. ASU9-12-15 RLF1-RLS familie.pdf - section 11 Function setting. Written in our own words; check the manual for your exact model.

Button combinations

Key presses that open menus, show readouts or switch modes.

Recall the stored error on the indoor lamps

Heat pump · Fujitsu wall-mounted KMCG (ASEH-AOEH 07-14)

The indoor unit keeps the last error in memory through a power cut and shows it on the OPERATION, TIMER and ECONOMY lamps during the start-up wait.

  1. Stop the unit, remove power, then switch power back on.
  2. During the 2 minute 20 second start-up wait, run the unit and press TEST RUN on the remote, or keep MANUAL AUTO pressed on the indoor unit for at least 10 seconds.
  3. Read the lamp flashes against the error table.
  4. To erase it press MANUAL AUTO while the memory is shown (short beep for about 3 seconds).

Applies to: Fujitsu ductless heat pumps: Fujitsu wall-mounted KMCG (ASEH07-14KMCG / AOEH07-14KMCG)

Source: Fujitsu Wall-mounted KMCG (ASEH-AOEH 07-14) - Fujitsu UK; same error-code scheme as NA ASU-AOU units service S.pdf - section 03 Troubleshooting, 1-1 and 1-2 error memory. 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 a forced cooling test run from the indoor unit

Heat pump · Fujitsu wall-mounted 7-15 (NA ASU/AOU type), Fujitsu multi-zone outdoor 18/24 type

Holding MANUAL AUTO on the indoor unit starts forced cooling when the remote is lost or the outdoor unit will not start on room temperature.

  1. Keep MANUAL AUTO pressed longer than 10 seconds.
  2. Watch for the OPERATION and TIMER lamps flashing together.
  3. In the wall unit the heating test run follows about three minutes later when HEAT is chosen on the remote.
  4. Stop with the remote START/STOP key, or press MANUAL AUTO briefly.

Applies to: Fujitsu ductless heat pumps: Fujitsu wall-mounted 7-15 (NA ASU/AOU type); Fujitsu ductless heat pumps: Fujitsu multi-zone outdoor 18/24 type (18 type 2-zone, 24 type 3-zone)

Source: Fujitsu Wall-mounted 7-9-12-15 (North American trilingual, UTY-RNNUM remotes; e.g. ASU9-12-15 RLF1-RLS familie.pdf - section 12 Test run; Fujitsu Outdoor unit 18-24 type (North American trilingual) installation P-N 9374747160.pdf - section 9 Pump down operation. Written in our own words; check the manual for your exact model.

Start a test run from the wired remote

Heat pump · Fujitsu wall-mounted 7-15 (NA ASU/AOU type)

Optional wired remote starts the test run with a two-key press while the unit is stopped.

  1. Stop the air conditioner.
  2. Press the master control key and the fan control key together for 2 seconds or more.
  3. Press START/STOP to end the test run.

Applies to: Fujitsu ductless heat pumps: Fujitsu wall-mounted 7-15 (NA ASU/AOU type)

Source: Fujitsu Wall-mounted 7-9-12-15 (North American trilingual, UTY-RNNUM remotes; e.g. ASU9-12-15 RLF1-RLS familie.pdf - section 12 Test run. 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.

Change the wireless remote custom code (A/B/C/D)

Heat pump · Fujitsu wall-mounted 7-15 (NA ASU/AOU type), Fujitsu slim duct ARU 7-18 (LL type)

The indoor unit only answers to a remote with the same custom code; the default is A and it returns to A when the batteries are replaced.

  1. Press START/STOP until only the clock shows on the remote.
  2. Hold MODE for 5 seconds or more to show the current code.
  3. Press SET TEMP up or down to cycle A, B, C, D.
  4. Press MODE again to return to the clock and store it.
  5. If no key is pressed within 30 seconds the remote goes back to the clock without a change.

Applies to: Fujitsu ductless heat pumps: Fujitsu wall-mounted 7-15 (NA ASU/AOU type); Fujitsu ductless heat pumps: Fujitsu slim duct ARU 7-18 (LL type)

Source: Fujitsu Wall-mounted 7-9-12-15 (North American trilingual, UTY-RNNUM remotes; e.g. ASU9-12-15 RLF1-RLS familie.pdf - section 11 Function setting, step 1 and remote controller custom code setting; Fujitsu Slim duct AR07-09-12-14-18 (ARU-ARYG LL-type equivalent) installation P-N 9381858064.pdf - section 13 Customer guidance. Written in our own words; check the manual for your exact model.

Related

Fujitsu 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.