Fujitsu · Heat pump

44 Human (occupancy) sensor error

Low severity Fujitsu slim duct ARU 7-18 (LL type)

What the control is telling you

The occupancy sensor has failed or is disconnected. Indoor lamps: OPERATION (green) flashes 4x, TIMER (orange) flashes 4x, ECONOMY (green) flashes fast nonstop; wired remote shows 44.

Applies to: Fujitsu ductless heat pumps: Fujitsu slim duct ARU 7-18 (LL type)

Likely causes

Sensor plug
Sensor fault

Test and repair steps

Check sensor connector.
Replace the sensor; then the PCB if needed.

Settings for these units

Operating range and service space · Fujitsu multi-zone outdoor 18/24 type

Other codes on the same units

33 Indoor fan motor power consumption error
35 MANUAL AUTO button error
39 Indoor fan motor power supply error
41 Room (intake air) temperature sensor error
42 Indoor coil (heat exchanger middle) sensor error
51 Indoor fan motor error
53 Drain pump error
57 Damper error

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Source: Fujitsu Slim duct AR07-09-12-14-18 (ARU-ARYG LL-type equivalent) installation P-N 9381858064.pdf - section 14 Error codes. Summarized in our own words; check the original manual for your model.

Homeowner looking at this code? See what it means for you and when to call a technician.

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.